Updated on 2025/08/06

写真a

 
NISHIKAWA Takeshi
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Assistant Professor
Position
Assistant Professor
External link

Degree

  • Ph.D ( Osaka University )

  • Master of Engineering ( Osaka University )

Research Areas

  • Energy Engineering / Applied plasma science

  • Natural Science / Mathematical physics and fundamental theory of condensed matter physics

  • Energy Engineering / Fundamental plasma

Education

  • Osaka University   大学院工学研究科   電気工学専攻

    - 1992

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  • Osaka University   工学部   電気工学科

    - 1989

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Professional Memberships

Committee Memberships

  • プラズマ・核融合学会   代議員  

    2000   

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    Committee type：Academic society

    プラズマ・核融合学会

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  • 日本物理学会   原子・分子分科世話人  

    1998   

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    Committee type：Academic society

    日本物理学会

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Papers

  • Exploring the structural and optical properties in Cs<inf>3</inf>Fe<inf>2</inf>Cl<inf>9</inf> perovskite through ruthenium doping

    Thiri Htun, Hytham Elbohy, Hiroo Suzuki, Kazumasa Horigane, Chiyu Nakano, Takeshi Nishikawa, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    Journal of Materials Science: Materials in Electronics   36 ( 5 )   2025.2

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s10854-025-14382-1

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  • Enhanced capacity of aluminum-ion batteries by adjusting the average pore size of the porous carbon cathode

    Yifeng Chen, Hiroo Suzuki, Shu Fukumoto, Chiyu Nakano, Takeshi Nishikawa, Shigeyuki Umezawa, Yasuhiko Hayashi

    Journal of Materials Chemistry A   13 ( 11 )   8052 - 8058   2025

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    Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    Porous carbon materials exhibit unique performance as cathodes for aluminum-ion batteries (AIBs), with capacity primarily influenced by average pore size, while the effect of specific surface area is relatively limited.

    DOI： 10.1039/d4ta08671f

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  • Optical bandgap tuning in SnO2–MoS2 nanocomposites: manipulating the mass of SnO2 and MoS2 using sonochemical solution mixing

    Chinkhai Ong, Weng Nam Lee, Yee Seng Tan, Patrik Ohberg, Yasuhiko Hayashi, Takeshi Nishikawa, Yuenkiat Yap

    Journal of Materials Science: Materials in Electronics   36 ( 1 )   2024.12

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    This study investigates controlled optical bandgap tuning through precise adjustment of the SnO2 and MoS2 mass in nanocomposites. A sonochemical solution mixing method, coupled with bath sonication, is employed for the preparation of SnO2–MoS2 nanocomposite. This approach allows for comprehensive characterization using UV–Vis FTIR, XRD, EDX, Raman spectroscopies, and FESEM, providing insights into morphology, chemical, and optical properties. Increasing the SnO2 mass leads to a linear decrease in the optical bandgap energy, from 3.0 to 1.7 eV. Similarly, increasing the MoS2 mass also results in a decrease in the optical bandgap energy, with a limitation of around 2.01 eV. This work demonstrates superior control over optical bandgap by manipulating the SnO2 mass compared to MoS2, highlighting the complexities introduced by MoS2 2D nanosheets during sonication. These findings hold significant value for optoelectronic applications, emphasizing enhanced control of optical bandgap through systematic mass manipulation.

    DOI： 10.1007/s10854-024-14061-7

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    Other Link： https://link.springer.com/article/10.1007/s10854-024-14061-7/fulltext.html

  • Phenolphthalein: A Potent Small-Molecule Additive for High-Performance and Ambient-Air-Stable FAPbI3 Perovskite Solar Cells

    Hytham Elbohy, Hiroo Suzuki, Takeshi Nishikawa, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    ACS Applied Energy Materials   2024.3

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    Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/acsaem.4c00158

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  • N‐DMBI Doping of Carbon Nanotube Yarns for Achieving High n‐Type Thermoelectric Power Factor and Figure of Merit

    Hiroo Suzuki, Jun Kametaka, Shinya Nakahori, Yuichiro Tanaka, Mizuki Iwahara, Haolu Lin, Sergei Manzhos, Aung Ko Ko Kyaw, Takeshi Nishikawa, Yasuhiko Hayashi

    Small Methods   2024.3

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    The application of carbon nanotube (CNT) yarns as thermoelectric materials for harvesting energy from low‐grade waste heat including that generated by the human body, is attracting considerable attention. However, the lack of efficient n‐type CNT yarns hinders their practical implementation in thermoelectric devices. This study reports efficient n‐doping of CNT yarns, employing 4‐(1, 3‐dimethyl‐2, 3‐dihydro‐1H‐benzimidazole‐2‐yl) phenyl) dimethylamine (N‐DMBI) in alternative to conventional n‐dopants, with o‐dichlorobenzene emerging as the optimal solvent. The small molecular size of N‐DMBI enables highly efficient doping within a remarkably short duration (10 s) while ensuring prolonged stability in air and at high temperature (150 °C). Furthermore, Joule annealing of the yarns significantly improves the n‐doping efficiency. Consequently, thermoelectric power factors (PFs) of 2800, 2390, and 1534 µW m−1 K−2 are achieved at 200, 150, and 30 °C, respectively. The intercalation of N‐DMBI molecules significantly suppresses the thermal conductivity, resulting in the high figure of merit (ZT) of 1.69×10−2 at 100 °C. Additionally, a π‐type thermoelectric module is successfully demonstrated incorporating both p‐ and n‐doped CNT yarns. This study offers an efficient doping strategy for achieving CNT yarns with high thermoelectric performance, contributing to the realization of lightweight and mechanically flexible CNT‐based thermoelectric devices.

    DOI： 10.1002/smtd.202301387

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  • Influence of Dilution Upon the Ultraviolet-Visible Peak Absorbance and Optical Bandgap Estimation of Tin(IV) Oxide and Tin(IV) Oxide-Molybdenum(IV) Sulfide Solutions

    Chin Khai Ong, Weng Nam Lee, Mohammad Khalid, Muhammad Amirul Aizat Mohd Abdah, Patrik Ohberg, Ling Hong Lim, Yasuhiko Hayashi, Takeshi Nishikawa, Yuenkiat Yap

    Analytical Letters   58 ( 2 )   196 - 212   2024.2

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    Publishing type：Research paper (scientific journal)   Publisher：Informa UK Limited  

    DOI： 10.1080/00032719.2024.2320826

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  • Lead-free iron-doped Cs3Bi2Br9 perovskite with tunable properties

    Thiri Htun, Amr Elattar, Hytham Elbohy, Kosei Tsutsumi, Kazumasa Horigane, Chiyu Nakano, Xiaoyu Gu, Hiroo Suzuki, Takeshi Nishikawa, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    RSC Advances   14 ( 32 )   23177 - 23183   2024

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    Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    The bandgap of lead-free, non-toxic Cs3Bi2Br9 perovskite material is reduced from 2.54 eV to 1.78 eV by changing the crystal structure to Cs3Bi2−xFexBr9, Cs2Bi1−xFexBr5, and CsFeBr4, depending on the varying Fe doping concentrations.

    DOI： 10.1039/d4ra04062g

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  • Benzophenone: A Small Molecule Additive for Enhanced Performance and Stability of Inverted Perovskite Solar Cells. International journal

    Hytham Elbohy, Hiroo Suzuki, Takeshi Nishikawa, Thiri Htun, Kosei Tsutsumi, Chiyu Nakano, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    ACS applied materials & interfaces   2023.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    In this study, we investigated the impact of benzophenone (BP), a small molecule additive, on the performance and stability of inverted perovskite solar cells (PSCs). Specifically, we introduced BP into the perovskite precursor solution of FAPbI3 to fabricate PSCs with an ITO/PEDOT:PSS/BP:FAPbI3/PCBM/C60/PCB/Ag architecture. The incorporation of BP with an optimum concentration of 2 mg mL-1 significantly enhanced the power conversion efficiency (PCE) of the inverted PSC from 13.12 to 18.84% with negligible hysteresis. Notably, the BP-based PSCs retained ∼90% of their initial PCE after being stored in ambient air with 30% relative humidity at 25 °C for 700 h. In contrast, control devices showed rapid degradation, retaining only 30% of their initial value within 300 h under the same conditions. We attributed the superior performance and stability of the BP-based PSCs to the grain boundary passivation of the perovskite film. The improvement was mainly attributed to the intermolecular interaction between the O-donor Lewis base BP material and both Pb2+ and FA+ in FAPbI3. This effectively suppresses trap-assisted recombination and promotes the conversion of the δ-phase to photoactive and stable α-phase FAPbI3. Overall, our findings suggest that BP is a promising additive for improving the performance and stability of inverted PSCs.

    DOI： 10.1021/acsami.3c09835

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  • Dispersion stability of tin(IV) oxide nanoparticles in polar solvents and water aided by ultrasonication

    Chinkhai Ong, Wengnam Lee, Linghong Lim, Wuyi Chong, Jingwen Chew, Yasuhiko Hayashi, Takeshi Nishikawa, Patrik Öhberg, Harith Ahmad, Yuenkiat Yap

    Japanese Journal of Applied Physics   62 ( 3 )   035002 - 035002   2023.3

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    Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    Dispersion stability of tin(IV) oxide nanoparticles dispersed in N-Methy-2-Pyrrolidone (NMP), dimethylformamide (DMF) and distilled water assisted by ultrasonication was investigated, aiming to identify a suitable liquid medium to effectively disperse tin(IV) oxide for many useful applications. The dispersions’ stability was characterized using field emission scanning electron microscopy, ultraviolet–visible spectroscopy and Zeta potential. The results show that distilled water has the highest stability with optimum sonication of 1 h. NMP shows better stability and consistency than DMF at different sonication timings. Good agreement between ultraviolet–visible absorbance and Zeta potentials shows that both distilled water and NMP are good mediums to produce highly stable tin(V) oxide dispersion.

    DOI： 10.35848/1347-4065/acc0b5

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    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/acc0b5/pdf

  • Mixed-halide copper-based perovskite R2Cu(Cl/Br)(4) with different organic cations for reversible thermochromism

    Amr Elattar, Kosei Tsutsumi, Hiroo Suzuki, Takeshi Nishikawa, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    NEW JOURNAL OF CHEMISTRY   46 ( 45 )   21737 - 21745   2022.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d2nj04693h

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  • Enhancement of the mechanical and thermal transport properties of carbon nanotube yarns by boundary structure modulation

    Ryo Shikata, Hiroo Suzuki, Yuta Hayashi, Taisuke Hasegawa, Yuho Shigeeda, Hirotaka Inoue, Wataru Yajima, Jun Kametaka, Mitsuaki Maetani, Yuichiro Tanaka, Takeshi Nishikawa, Satoshi Maeda, Yasuhiko Hayashi, Masaki Hada

    NANOTECHNOLOGY   33 ( 23 )   2022.6

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/1361-6528/ac57d5

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  • Single Crystals of Mixed-Cation Copper-Based Perovskite with Trimodal Bandgap Behavior

    Amr Elattar, Wenhui Li, Hiroo Suzuki, Takashi Kambe, Takeshi Nishikawa, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    CHEMISTRY-A EUROPEAN JOURNAL   28 ( 26 )   2022.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/chem.202104316

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  • Modeling the wavelength of unresolved transition arrays in the extreme ultraviolet region from Sn to Hf ions by combining theoretical and experimental spectral data

    A. Sasaki, K. Fujii, I. Murakami, H. A. Sakaue, T. Nishikawa, H. Ohashi, N. Nakamura

    AIP ADVANCES   12 ( 2 )   2022.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0077130

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  • Highly Oriented Carbon Nanotube Supercapacitors

    Kohei Komatsubara, Hiroo Suzuki, Hirotaka Inoue, Misaki Kishibuchi, Shona Takahashi, Tatsuki Marui, Shigeyuki Umezawa, Tomohiro Nakagawa, Kyohei Nasu, Mitsuaki Maetani, Yuichiro Tanaka, Miyato Yamada, Takeshi Nishikawa, Yoshifumi Yamashita, Masaki Hada, Yasuhiko Hayashi

    ACS APPLIED NANO MATERIALS   5 ( 1 )   1521 - 1532   2022.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsanm.1c04236

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  • Copper-incorporation for polytypism and bandgap engineering of MAPbBr3 perovskite thin films with enhanced near-Infrared photocurrent-response

    Amr Elattar, Jiban Kangsabanik, Kodai Nakao, Kosei Tsutsumi, Hiroo Suzuki, Takeshi Nishikawa, Kristian S. Thygesen, Yasuhiko Hayashi

    Materials Chemistry Frontiers   6 ( 18 )   2690 - 2702   2022

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    Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    Formation of secondary phase polytypes through incorporation of copper into MAPbBr3 perovskite yields bandgap reduction with generation of near-IR photocarriers.

    DOI： 10.1039/d2qm00491g

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  • Structure modulation for bandgap engineered vacancy-ordered Cs3Bi2Br9 perovskite structures through copper alloying

    Amr Elattar, Libor Kobera, Jiban Kangsabanik, Hiroo Suzuki, Sabina Abbrent, Takeshi Nishikawa, Kristian S. Thygesen, Jiri Brus, Yasuhiko Hayashi

    Journal of Materials Chemistry C   10 ( 35 )   12863 - 12872   2022

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    Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    Light absorption enhancement was achieved through structure modulation of the Cs3Bi2Br9 perovskite crystal via Cu-alloying. The Cs3Bi2Br9 perovskite retains its matrix structure with homogeneously distributed Cs2CuBr4 large domains.

    DOI： 10.1039/d2tc01762h

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  • Improved room-temperature thermoelectric characteristics in F4TCNQ-doped CNT yarn/P3HT composite by controlled doping

    May Thu Zar Myint, Takeshi Nishikawa, Hirotaka Inoue, Kazuki Omoto, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    ORGANIC ELECTRONICS   90   2021.3

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2020.106056

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  • Single crystal of two-dimensional mixed-halide copper-based perovskites with reversible thermochromism

    Amr Elattar, Hiroo Suzuki, Ryuji Mishima, Kodai Nakao, Hiromi Ota, Takeshi Nishikawa, Hirotaka Inoue, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    Journal of Materials Chemistry C   9 ( 9 )   3264 - 3270   2021

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d0tc04307a

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  • Synthesis and characterization of conductive flexible cellulose carbon nanohorn sheets for human tissue applications. International journal

    Karthik Paneer Selvam, Taichi Nagahata, Kosuke Kato, Mayuko Koreishi, Toshiyuki Nakamura, Yoshimasa Nakamura, Takeshi Nishikawa, Ayano Satoh, Yasuhiko Hayashi

    Biomaterials research   24   18 - 18   2020

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    Language：English   Publishing type：Research paper (scientific journal)  

    Background: Conductive sheets of cellulose and carbon nanomaterials and its human skin applications are an interesting research aspect as they have potential for applications for skin compatibility. Hence it is needed to explore the effects and shed light on these applications. Method: To fabricate wearable, portable, flexible, lightweight, inexpensive, and biocompatible composite materials, carbon nanohorns (CNHs) and hydroxyethylcellulose (HEC) were used as precursors to prepare CNH-HEC (Cnh-cel) composite sheets. Cnh-cel sheets were prepared with different loading concentrations of CNHs (10, 20 50,100 mg) in 200 mg cellulose. To fabricate the bio-compatible sheets, a pristine composite of CNHs and HEC was prepared without any pretreatment of the materials. Results: The obtained sheets possess a conductivity of 1.83 × 10- 10 S/m and bio-compatible with human skin. Analysis for skin-compatibility was performed for Cnh-cel sheets by h-CLAT in vitro skin sensitization tests to evaluate the activation of THP-1 cells. It was found that THP-1 cells were not activated by Cnh-cel; hence Cnh-cel is a safe biomaterial for human skin. It was also found that the composite allowed only a maximum loading of 100 mg to retain the consistent geometry of free-standing sheets of < 100 μm thickness. Since CNHs have a unique arrangement of aggregates (dahlia structure), the composite is homogeneous, as verified by transmission electron microscopy (TEM) and, scanning electron microscopy (SEM), and other functional properties investigated by Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), conductivity measurement, tensile strength measurement, and skin sensitization. Conclusion: It can be concluded that cellulose and CNHs sheets are conductive and compatible to human skin applications.

    DOI： 10.1186/s40824-020-00194-3

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  • Influence of pressure of nitrogen gas on structure and thermoelectric properties of acid-treated PEDOT:PSS films Reviewed

    May Thu Zar Myint, Hirotaka Inoue, Susumu Ichimura, Takeshi Nishikawa, Yuta Nishina, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    Journal of Materials Science: Materials in Electronics   30 ( 14 )   13534 - 13542   2019.7

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s10854-019-01721-2

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  • Bond Dissociation Triggering Molecular Disorder in Amorphous H2O Reviewed

    M Hada, Y Shigeeda, S Koshihara, T Nishikawa, Y Yamashita, Y Hayashi

    The Journal of Physical Chemistry A   122 ( 49 )   9579 - 9584   2018.11

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  • Rapid growth of tall and dense double-wall carbon nanotubes and its wire application by dry spinning process

    8 ( 1 )   29 - 33   2017.7

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  • Investigation of the ionization balance of bismuth-to-tin plasmas for the extreme ultraviolet light source based on a computer-generated collisional radiative model Reviewed

    Akira Sasaki, Atsushi Sunahara, Katsunobu Nishihara, Takeshi Nishikawa

    AIP ADVANCES   6 ( 10 )   2016.10

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4964496

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  • Atomic process modeling in dense hydrogenic plasmas by nearest neighbor approximation Reviewed

    T. Nishikawa*

    Journal of Physics: Conference Series   688 ( 1 )   2016.4

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/1742-6596/688/1/012077

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  • Atomic process modeling in dense hydrogenic plasmas by nearest neighbor approximation Reviewed

    Takeshi Nishikawa

    Journal of Physics: Conference Series   688 ( 1 )   2016.3

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/1742-6596/688/1/012099

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  • Atomic processes and equation of state of high Z plasmas for EUV sources and their effects on the spatial and temporal evolution of the plasmas Reviewed

    Akira Sasaki, Atushi Sunahara, Hiroyuki Furukawa, Katsunobu Nishihara, Takeshi Nishikawa, Fumihiro Koike

    8TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2013)   688 ( 1 )   2016

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1088/1742-6596/688/1/012099

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  • 22aAE-1 Evaluation of Ionic and Atomic Potential Considering Electron Distribution in Plasmas and Its Application for Computing Electron State Densities

    NISHIKAWA Takeshi

    Meeting Abstracts of the Physical Society of Japan   71   965 - 965   2016

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

    DOI： 10.11316/jpsgaiyo.71.1.0_965

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  • Self-Assembled C-60 Fullerene Cylindrical Nanotubes by LLIP method Reviewed

    Venkata Krishna R. Rao, P. S. Karthik, Venkata K. Abhinav, Zaw Lin, May Thu Zar Myint, Takeshi Nishikawa, Masaki Hada, Yoshifumi Yamashita, Yasuhiko Hayashi, Surya Prakash Singh

    2016 IEEE 16TH INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO)   303 - 306   2016

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  • 19aCP-12 Definition of bound state in atomic process model based on nearest neighbor approximation

    NISHIKAWA Takeshi

    Meeting Abstracts of the Physical Society of Japan   70   705 - 705   2015

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

    DOI： 10.11316/jpsgaiyo.70.2.0_705

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  • 21aCJ-9 Partial dislocation motion incidental to the shrinkage of stacking fault introduced by electron beam irradiation in 4H-SiC epi-film

    Yamashita Y., Shimomura T., Nishikawa T., Hayashi Y.

    Meeting Abstracts of the Physical Society of Japan   70   2683 - 2683   2015

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    Language：Japanese   Publisher：The Physical Society of Japan (JPS)  

    DOI： 10.11316/jpsgaiyo.70.1.0_2683

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  • Modeling of free electronic state density in hydrogenic plasmas based on nearest neighbor approximation Reviewed

    Takeshi Nishikawa

    PHYSICS OF PLASMAS   21 ( 7 )   072713   2014.7

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4891440

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  • Modeling of radiative properties of Sn plasmas for extreme-ultraviolet source (vol 107, 113303, 2010)

    Akira Sasaki, Atsushi Sunahara, Hiroyuki Furukawa, Katsunobu Nishihara, Shinsuke Fujioka, Takeshi Nishikawa, Fumihiro Koike, Hayato Ohashi, Hajime Tanuma

    JOURNAL OF APPLIED PHYSICS   108 ( 2 )   2010.7

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  • Atomic processes in the LPP and LA-DPP EUV sources

    Akira Sasaki, Katsunobu Nishihara, Atsushi Sunahara, Hiroyuki Furukawa, Takeshi Nishikawa, Fumihiro Koike

    ALTERNATIVE LITHOGRAPHIC TECHNOLOGIES   7271   2009

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1117/12.814026

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  • Plasma physics and radiation hydrodynamics in developing an extreme ultraviolet light source for lithography Reviewed

    Katsunobu Nishihara, Atsushi Sunahara, Akira Sasaki, Masanori Nunami, Hajime Tanuma, Shinsuke Fujioka, Yoshinori Shimada, Kazumi Fujima, Hiroyuki Furukawa, Takako Kato, Fumihiro Koike, Richard More, Masakatsu Murakami, Takeshi Nishikawa, Vasilii Zhakhovskii, Kouhei Gamata, Akira Takata, Hirofumi Ueda, Hiroaki Nishimura, Yasukazu Izawa, Noriaki Miyanaga, Kunoki Mima

    PHYSICS OF PLASMAS   15 ( 5 )   056708-1 - 056708-11   2008.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.2907154

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  • EUV Source Design Flexibility for Lithography Reviewed

    T Nishikawa, A Sunahara, A Sasaki, and K Nishihara

    Journal of Physics: Conference Series   112   42065   2008.4

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  • Detailed atomic modeling of Sn plasmas for the EUV source Reviewed

    A. Sasaki, A. Sunahara, K. Nishihawra, T. Nishikawa, F. Koike, and H.Tanuma

    Journal of Physics: Conference Series   112   42062   2008.4

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  • Advanced laser-produced EUV light source for HVM with conversion efficiency of 5-7% and B-field mitigation of ions

    K. Nishihara, A. Sunahara, A. Sasaki, S. Fujioka, Y. Shimada, M. Nunami, H. Tanuma, M. Murakami, T. Aota, K. Fujima, H. Furukawa, T. Nishikawa, F. Koike, R. More, T. Kato, V. Zhakhovskii, K. Gamata, H. Ueda, H. Nishimura, Y. Yuba, K. Nagai, N. Miyanaga, Y. Izawa, K. Mima

    Proceedings of SPIE - The International Society for Optical Engineering   6921 ( 33 )   2008.2

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1117/12.769086

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  • レーザー生成スズプラズマからの極端紫外光発生の放射流体シミュレーション Reviewed

    砂原淳、佐々木明、田沼肇、西原功修、*西川亘、小池文博、藤岡慎介、青田達也、山浦道照、島田義則、西村博明、井澤靖和、宮永憲明、三間圀興

    プラズマ・核融合学会誌   920   2007.4

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  • Theoretical and experimental databases for high average power EUV light source by laser produced plasma Reviewed

    H. Nishimura, K. Nishihara, S. Fujioka, T. Aota, T. Ando, M. Shimomura, K. Sakaguchi, Y. Simada, M. Yamaura, K. Nagai, T. Norimatsu, A. Sunahara, M. Murakami, A. Sasaki, H. Tanuma, F. Koike, K. Fuijma, C. Suzuki, S. Morita, T. Kato, T. Kagawa, T. Nishikawa, N. Miyanaga, Y. Izawa, K. Mima

    AIP Conference Proceedings   926   270 - 280   2007

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1063/1.2768859

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  • Development of EUV Lithography Source Based on Laser-Produced Plasma

    The Review of Laser Engineering   35 ( Supplement )   S13 - S14   2007

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    Language：Japanese   Publisher：The Laser Society of Japan  

    DOI： 10.2184/lsj.35.s13

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  • Development of EUV light source by laser-produced plasma

    Y. Izawa, N. Miyanaga, H. Nishimura, S. Fujioka, T. Aota, Y. Tao, S. Uchida, Y. Shimada, K. Hashimoto, M. Yamaura, K. Nishihara, M. Murakami, A. Sunahara, H. Furukawa, A. Sasaki, W. Nishikawa, H. Tanuma, T. Norimatsu, K. Nagai, Q. Gu, M. Nakatsuka, H. Fujita, K. Tsubakimoto, H. Yoshida, K. Mima

    Journal De Physique. IV : JP   133   1161 - 1165   2006.6

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    DOI： 10.1051/jp4:2006133237

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  • Numerical analysis of energy trasport by intense resonance line in Lithium plasmas

    *T. Nishikawa, K. Gamada, A. Sunahara, K. Nishihara

    Journal de physique IV   2006.6

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  • Conversion efficiency of LPP sources

    Katsunobu Nishihara, Akira Sasaki, Atsushi Sunahara, Takeshi Nishikawa

    EUV Sources for Lithography   339 - 370   2006.2

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    Language：English   Publishing type：Part of collection (book)   Publisher：SPIE  

    DOI： 10.1117/3.613774.Ch11

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  • Progress in LPP EUV source development at Osaka University

    Noriaki Miyanaga, Hiroaki Nishimura, Shinsuke Fujioka, Tatsuya Aota, Shigeaki Uchida, Michiteru Yamaura, Yoshinori Shimada, Kazuhisa Hashimoto, Keiji Nagai, Takayoshi Norimatsu, Katsunobu Nishihara, Masakatsu Murakami, Vasilli Zhakhovskii, Young Gwang Kang, Atsushi Sunahara, Hiroyuki Furukawa, Akira Sasaki, Takeshi Nishikawa, Masahiro Nakatsuka, Hisanori Fujita, Koji Tsubakimoto, Hidetsugu Yoshida, Yasukazu Izawa, Kunioki Mima

    EMERGING LITHOGRAPHIC TECHNOLOGIES X, PTS 1 AND 2   6151   U567 - U574   2006

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1117/12.656555

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  • Opacity effect on extreme ultraviolet radiation from laser-produced tin plasmas

    Shinsuke Fujioka, Hiroaki Nishimura, Katsunobu Nishihara, Akira Sasaki, Atsushi Sunahara, Tomoharu Okuno, Nobuyoshi Ueda, Tsuyoshi Ando, Yezheng Tao, Yoshinori Shimada, Kazuhisa Hashimoto, Michiteru Yamaura, Keisuke Shigemori, Mitsuo Nakai, Keiji Nagai, Takayoshi Norimatsu, Takeshi Nishikawa, Noriaki Miyanaga, Yasukazu Izawa, Kunioki Mima

    Physical Review Letters   95 ( 23 )   2005.12

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevLett.95.235004

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  • Characterization of extreme ultraviolet emission from laser-produced spherical tin plasma generated with multiple laser beams

    Y. Shimada, H. Nishimura, M. Nakai, K. Hashimoto, M. Yamaura, Y. Tao, K. Shigemori, T. Okuno, K. Nishihara, T. Kawamura, A. Sunahara, T. Nishikawa, A. Sasaki, K. Nagai, T. Norimatsu, S. Fujioka, S. Uchida, N. Miyanaga, Y. Izawa, C. Yamanaka

    Applied Physics Letters   86 ( 5 )   1 - 3   2005.1

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.1856697

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  • Estimations on high energy ions and neutral particles from LPP EUV light sources Reviewed

    H. Furukawa, T. Kawamura, T. Nishikawa, A. Sasaki, K. Fujima, S. Fujioka, H. Nishimura, K. Nishihara, N. Miyanaga, Y. Izawa, C. Yamanaka

    Progress in Biomedical Optics and Imaging - Proceedings of SPIE   5751 ( II )   789 - 797   2005

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    DOI： 10.1117/12.597959

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  • Effect of the satellite lines and opacity on the extreme ultraviolet emission from high-density Xe plasmas

    SASAKI A.

    Applied Physics Letters   85   5857 - 5859   2004.12

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  • レーザー生成球対称Snプラズマからの極短紫外線(EUV)放射特性

    西村博明25名20番目

    プラズマ・核融合学会誌   2004.4

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  • Estimation of emission efficiency for laser-produced EUV-plasmas

    Tohru Kawamura, Atsushi Sunahara, Kouhei Gamada, Kazumi Fujima, Fumihiro Koike, Hiroyuki Furukawa, Takeshi Nishikawa, Akira Sasaki, Takashi Kagawa, Richard More, Takako Kato, Masakatsu Murakami, Vasilli Zhakhovskii, Hajime Tanuma, Takashi Fujimoto, Yoshinori Shimada, Michiteru Yamaura, Kazuhisa Hashimoto, Shigeaki Uchida, Chiyoe Yamanaka, Tomoharu Okuno, Takahiro Hibino, Nobuyoshi Ueda, Ryoji Matsui, Yezheng Tao, Mitsuo Nakai, Keisuke Shigemori, Shinsuke Fujioka, Keiji Nagai, Takayoshi Norimatsu, Hiroaki Nishimura, Katsunobu Nishihara, Noriaki Miyanaga, Yasukazu Izawa

    Proceedings of SPIE - The International Society for Optical Engineering   5374 ( PART 2 )   918 - 925   2004.4

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1117/12.535031

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  • Theoretical simulation of extreme UV radiation source for lithography

    K. Fujima, K. Nishihara, T. Kawamura, H. Furukawa, T. Kagawa, F. Koike, R. More, M. Murakami, *T. Nishikawa, A. Sasaki, A. Sunahara, V. Zhakhovskii, T. Fujimoto, H. Tanuma

    Proc. SPIE   2004.4

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  • Simulation of the EUV spectrum of Xe and Sn plasmas

    Akira Sasaki, Katsunobu Nishihara, Fumihiro Koike, Takashi Kagawa, *Takeshi Nishikawa, Kazumi Fujima, Tohru Kawamura and Hiroyuki Furukawa

    special issue of the IEEE, Journal of Selected Topics in Quantum Electronics on "Short wavelength and EUV Lasers"   2004.1

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  • Theoretical modeling of laser-produced plasmas for development of extreme UV radiation source for lithography Reviewed

    Nishihara K, Nishikawa T, Sasaki A, Kawamura T, Sunahara A, Furukawa H, Murakami M, Nishimura H, Shimada Y, Nakai M, Fujioka S, Shigemori K, Uchida S, Fujima K, More R, Koike F, Kagawa T, Zhakhovskii V, Hashimoto K, Yamaura M, Matsui R, Hibino T, Okuno T, Tao Y, Sohnatzadeh F.L, Nagai K, Norimatsu T, Tanuma H, Miyanaga N, Izawa Y

    Inertial Fusion Sciences and Applications 2003   1069 - 1073   2004

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    Other Link： http://orcid.org/0000-0002-3978-8427

  • Simple atomic model based on the plasma microfield

    Takeshi NISHIKAWA

    Proceedings of Second International Conference on Inertial Fusion Sciences and Applications 2001, September 9-14, 2001, Kyoto (IFSA2001)   2001.4

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  • Novel Laboratory Fusion Sources

    T. Kenmotsu, *T. Nishikawa, R. More

    Proceedings of Second International Conference on Inertial Fusion Sciences and Applications 2001, September 9-14, 2001, Kyoto (IFSA2001)   2001.4

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  • Energy level data recommendation by screening constant

    T Nishikawa

    JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER   67 ( 1 )   43 - 54   2000.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0022-4073(99)00192-2

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  • Simple expression of occupation probability in the "chemical picture"

    T Nishikawa

    ASTROPHYSICAL JOURNAL   532 ( 1 )   670 - 672   2000.3

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  • SOFT-X-RAY SPECTRA OF HIGHLY IONIZED ELEMENTS WITH ATOMIC NUMBERS RANGING FROM 57 TO 82 PRODUCED BY COMPACT LASERS

    GM ZENG, H DAIDO, T NISHIKAWA, H TAKABE, S NAKAYAMA, H ARITOME, K MURAI, Y KATO, M NAKATSUKA, S NAKAI

    JOURNAL OF APPLIED PHYSICS   75 ( 4 )   1923 - 1930   1994.2

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    DOI： 10.1063/1.356339

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  • COMPUTATIONAL MODEL FOR NON-LTE ATOMIC PROCESS IN LASER-PRODUCED PLASMAS

    H TAKABE, T NISHIKAWA

    JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER   51 ( 1-2 )   379 - 395   1994.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/0022-4073(94)90101-5

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  • PLASMA X-RAY SOURCE OF VARIOUS MATERIALS PRODUCED BY COMPACT SOLID-STATE LASERS

    GM ZENG, H DAIDO, S NAKAYAMA, K MURAI, T NISHIKAWA, S KIYOKAWA, H TAKABE, H ARITOME, M NAKATSUKA, Y KATO, S NAKAI

    APPLICATIONS OF LASER PLASMA RADIATION   2015   45 - 56   1994

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1117/12.168000

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  • LINE-PROFILE MODELING FOR NON-LTE PARTIALLY IONIZED PLASMAS BASED ON AVERAGE ATOM MODEL WITH L-SPLITTING

    T NISHIKAWA, H TAKABE, K MIMA

    LASER AND PARTICLE BEAMS   11 ( 1 )   81 - 87   1993

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  • NON-LTE ATOMIC MODELING FOR LASER-PRODUCED PLASMAS

    H TAKABE, S NAKAMURA, T NISHIKAWA

    LASER AND PARTICLE BEAMS   11 ( 1 )   119 - 126   1993

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  • Statistical Approach for Calculating Opacities of High-Z Plasmas

    Journal Plasma Fusion Research   68,145   1992

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  • 統計手法を用いた高Zプラズマの原子モデル

    核融合研究   68,145   1992

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  • X-RAY-EMISSION AND TRANSPORT IN GOLD PLASMAS GENERATED BY 351-NM LASER IRRADIATION

    H NISHIMURA, H TAKABE, K KONDO, T ENDO, H SHIRAGA, K SUGIMOTO, T NISHIKAWA, Y KATO, S NAKAI

    PHYSICAL REVIEW A   43 ( 6 )   3073 - 3085   1991.3

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    DOI： 10.1103/PhysRevA.43.3073

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  • ION KINETIC EFFECT ON FUSION REACTION-RATE

    T NISHIKAWA, H TAKABE, K MIMA

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS   28 ( 10 )   2004 - 2010   1989.10

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Books

  • EUV Sources for Lithography

    Katsunobu Nishihara, Akira Sasaki, Atsushi Sunahara, *Takeshi Nishikawa（ Role： Sole author ,  Chapter 11 Conversion Efficiency of LPP Sources）

    SPIE Press  2005.4 

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    Responsible for pages：339-370  

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  • Simple atomic model based on the plasma microfield

    Elsevier, Proceedings of Second International Conference on Inertial Fusion Sciences and Applications 2001, September 9-14, 2001, Kyoto (IFSA2001)  2001 

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  • Novel Laboratory Fusion Sources(共著)

    Elsevier, Proceedings of Second International Conference on Inertial Fusion Sciences and Applications, September 9-14, 2001, Kyoto (IFSA2001)  2001 

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MISC

  • エネルギー輸送の違いから見たカーボンナノチューブの通電加熱の効果

    中條大樹, 井上寛隆, 黒田泰平, 森本大我, 林拓磨, 徳永知春, 池田直, 横谷尚睦, 藤森和博, 羽田真毅, 西川亘, 山下善文, 紀和利彦, 林靖彦

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   65th   2018

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  • ポリジアセチレンの熱・光誘起による相転移とそれに伴う構造変化

    森光生, 羽田真毅, 林靖彦, 山下善文, 西川亘, 井上寛隆, 伊東千尋, 腰原伸也

    応用物理・物理系学会中国四国支部合同学術講演会講演予稿集   2018   2018

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  • 高分子線材/CNT紡績糸マルチフィラメント・ソフトアクチュエータの開発

    井上寛隆, 吉山貴之, 中條大樹, 齋藤慶考, 羽田真毅, 西川亘, 山下善文, 宝田亘, 松本英俊, 林靖彦

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   65th   2018

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  • 時間分解電子線回折法を用いたEuBaCo2O5.38の構造ダイナミクス計測

    羽田 真毅, 鈴木 達也, 阿部 伸行, 有馬 孝尚, 沖本 洋一, 腰原 伸也, 慶尾 直哉, 村上 寛虎, 西川 亘, 山下 善文, 林 靖彦, 横谷 尚睦, 松尾 二郎, 浅香 透

    日本物理学会講演概要集   72   1128 - 1128   2017.1

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    Language：Japanese   Publisher：一般社団法人 日本物理学会  

    DOI： 10.11316/jpsgaiyo.72.2.0_1128

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  • 10aAE-4 Threading dislocation motion in Sb-doped SiGe thin films with various Ge content

    Yamashita Yoshifumi, Maki Shinya, Fushimi Tatsuya, Ohno Yutaka, Yonenaga Ichiro, Nishikawa Takeshi, Hayashi Yasuhiko

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   706 - 706   2014.8

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  • 28pAM-12 Partial dislocation motion in 4H-SiC with/without electron beam irradiation

    Yamashita Yoshifumi, Shimomura Takuya, Fujii Yuji, Nishikawa Takeshi, Hayashi Yasuhiko

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   933 - 933   2014.3

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  • 26pGY-3 Atomic Process Modeling base on the distribution of the nearest neighbor atom

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   257 - 257   2011.3

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  • 25pQA-15 State Density of Electrons and Average Charge Calculation Based on the Plasma Microfield

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   65 ( 2 )   200 - 200   2010.8

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  • 20aTJ-13 State Density of Electrons and Average Charge Calculation Based on the Binary Collision of Ions

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   225 - 225   2010.3

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  • 23pRA-11 Atomic Modeling of the plasma EUV sources

    Sasaki A., Nishihara K., Sunahara A., Nishikawa T., Koike F., Tanuma H.

    Meeting abstracts of the Physical Society of Japan   63 ( 1 )   154 - 154   2008.2

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  • Analysis of the emission spectrum of Xe and Sn

    A. Sasaki, K. Nishihara, A. Sunahara, T. Nishikawa, F. Koike, K. Kagawa, H. Tanuma

    EMERGING LITHOGRAPHIC TECHNOLOGIES X, PTS 1 AND 2   6151   61513W   2006

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  • 19pXK-5 Atomic modeling of the Euv sources

    Sasaki A., Nishihara C., Maehara H., Nishikawa T., Sunahara A., Koike F., Kagawa T., Tanuma H.

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   98 - 98   2005.8

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  • 19pXK-4 Simulation on laser ablation with time dependent population kinetics

    Furnkawa Hiroyuki, Sasaki Akira, Nishikawa Takeshi, Nishihara Katsunobu, Mima Kunioki

    Meeting abstracts of the Physical Society of Japan   60 ( 2 )   98 - 98   2005.8

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  • 24aXG-14 Opacity structure and conversion efficiency of EUV emitting plasmas

    Fujioka S., Nishimura H., OkunoT.

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   197 - 197   2005.3

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  • 30pWH-8 New Screened Hydrogenic Model involving n, l-splitting

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   59 ( 1 )   249 - 249   2004.3

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  • 28aB02 Characterization of EVU emission from Laser Produced Plasma

    NISHIMURA Hiroaki, SHIGEMORI Keisuke, NAKAI Mitsuo, FUJIOKA Shinsuke, Sohnatzadeh F.L, Zhakhovickii V, More R

    プラズマ・核融合学会年会予稿集   ( 20 )   2003.11

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    Language：Japanese   Publisher：The Japan Society of Plasma Science and Nuclear Fusion Research  

    DOI： 10.1585/jspf.80.325

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  • State density of free electrons including ionic potential in a plasma

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   56 ( 2 )   148 - 148   2001.9

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  • Atomic model based on semi-classical theory II

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   56 ( 1 )   128 - 128   2001.3

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  • Atomic model based on semi-classical theory

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   55 ( 1 )   121 - 121   2000.3

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  • Plasma effects reduced into elementary atomic processes

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   55 ( 1 )   114 - 114   2000.3

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  • 25aB-1 Calculation of statistical weight of highly excited states using the Stark effect by plasma microfield

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   54 ( 2 )   104 - 104   1999.9

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  • Calculation of statistical weight of highly excited states using the Stark effect by plasma microfield

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   53 ( 2 )   898 - 898   1998.9

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  • Calculation of Stark Profile of Lβ line by first Order Pertubed Wavefunction

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   53 ( 1 )   824 - 824   1998.3

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  • 7p-YN-4 Theoretical Calculation on Stark Effect Base on 1st Order Perturbed Wavefunction

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   52 ( 2 )   942 - 942   1997.9

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  • Theoretical Calculation of the Hydrogen Spectrum

    NISHIKAWA Takeshi

    1997 ( 26 )   7 - 10   1997.5

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  • 31a-YG-5 X-ray spectroscopic analysis of laser-produced plasmas

    NISHIKAWA Takeshi

    Meeting abstracts of the Physical Society of Japan   52 ( 1 )   867 - 867   1997.3

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  • 27a-YA-6 Energy Level Description of He-like Ions by Screened Hydrogenic Model

    Nishikawa T

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1995 ( 4 )   19 - 19   1995.9

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  • 30a-R-1 Electronic Population of High-Z plasma including I-distribution

    Nishikawa T.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1995 ( 4 )   213 - 213   1995.9

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  • Recommended Atomic Data for Collisional-radiatire Model of LI-like Ions and Gain Cakulation for la Li-like Ai Ions in the Recombining Plasmas

    NIFS-DATA-30, NATIPMA; OMSTOTITE FPR FISOPM SCOEMCE   9103p   1995

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  • 2a-L-11 Screened Hydorgenic Model for Opacity Calculations

    Nishikawa T

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1994 ( 4 )   23 - 23   1994.8

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  • 30p-E-5 Model dependence of atomic process in simulating population inversion of recombining Li-like Aluminum Plasma II

    Nishikawa T, Nishihara K

    Abstracts of the meeting of the Physical Society of Japan. Annual meeting   49 ( 2 )   391 - 391   1994.3

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  • 15a-DA-1 Model dependence of atomic process in simulating population inversion of recombining Li-like Aluminum Plasma

    Nishikawa T., Nishihara K.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting   1993 ( 2 )   461 - 461   1993.9

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  • Atomic Modeling and Radiation Transport in Laser Produced Plasmas

    Technology Reports of the Osaka University   41,253   1991

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Presentations

  • レーザー、放電励起EUV光源における原子過程および放電初期過程の考察

    佐々木明,西原功修,砂原淳,*西川亘,小池文博,古河裕之

    第70回応用物理学会学術講演会 

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    Event date： 2009.9.8

    Presentation type：Oral presentation (general)  

    Venue：富山大学  

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  • The atomic model of the Sn plasmas for the EUV sources International conference

    Akira Sasaki, Atsushi Sunahara, Katsunobu Nishihara, Takeshi Nishikawa, Fumihiro Koike, Hajime Tanuma

    14th Internationl Conference on the Physics of Highly Charged Ions 

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    Event date： 2008.9.2

    Presentation type：Poster presentation  

    Venue：Chofu, Tokyo, JAPAN  

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  • EUV~軟X線領域のプラズマ 光源のモデリング

    佐々木 明、1西原 功修、2砂原 淳、 3西川 亘、4小池 文博、2古河 裕之

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    Event date： 2008.4

    Presentation type：Oral presentation (general)  

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  • Advanced laser-produced EUV light source for HVM with conversion efficiency of 5-6% and B-field mitigation of ions (Invited Paper) International conference

    Katsunobu Nishihara, 間に8名, Takeshi Nishikawa*, 後ろに7名

    EUV Source II, SPIE Advance Lithography 

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    Event date： 2008.2.27

    Presentation type：Oral presentation (general)  

    Venue：San Jose, California, USA  

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  • EUV Source Desgin Flexility for Lithography

    *Nishikawa Takeshi, Sunahara Atsushi, Sasaki Akira, Nishihara Katsunobu

    Fifth International Conference on Inertial Fusion Science and Applications 

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    Event date： 2007.9.11

    Venue：Kobe  

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  • Snの輻射放出・吸収係数に対する発光線波長の精度の影響

    佐々木明、西原功修、砂原淳、*西川亘、小池文博、香川貴司、田沼肇

    第５４回応用物理学関係連合講演会 

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    Event date： 2007.3.29

    Venue：青山学院大学 相模原キャンパス  

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  • レーザー生成錫プラズマからの極端紫外光発生の最適化

    砂原淳、西原功修、佐々木明、*西川亘、藤岡慎介、青田達也、山浦道照、島田義則、西村博明、宮永憲明、井澤靖和、三間圀興

    レーザー学会学術講演会第２７回年次大会 

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    Event date： 2007.1.18

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  • Detailed Modeling of Atomic Process and Radiative Transfer of the EUV Source Plasmas

    Akira Sasaki, Atsushi Sunahara, Katsunobu Nishihara, *Takeshi Nishikawa, Fumihiro Koike, Takashi Kagawa, Hajime Tanuma

    EUV Source Workshop 

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    Event date： 2006.10.19

    Venue：Barcelona, Spain  

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  • Laser and Target Optimization for the Highest Conversion to 13.5 nm EUV Light with Laser Produced, Minimum-Mass Tin Plasma

    Hiroaki Nishimura他18名11番目

    5nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2006.10.15

    Venue：Barcelona, Spain  

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  • Radiation Hydrodynamic Simulation for LPP EUV Sources

    Atsushi Sunahara他11名4番目

    5nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2006.10.15

    Venue：Barcelona, Spain  

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  • Systematics of Atomic 4d-4f Transitions of Atomic Ions in EUVL Source Plasmas and Neighboring Atomic Numbers

    Fumihiro Koike, Akira Sasaki, Katsunobu Nishihara, Atsushi Sunahara, Takeshi Nishikawa, Takashi Kagawa, Hajime Tanuma

    5nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2006.10.15

    Venue：Barcelona, Spain  

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  • Theoretical Guidelines of LPP-EUV Sources for HVM

    Katsunobu Nishihara他21名10番目

    5nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2006.10.15

    Venue：Barcelona, Spain  

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  • Modeling of the Atomic Processes in EUVL Source Plasmas

    Akira Sasaki, Katsunobu Nishihara, Atsushi Sunahara, *Takeshi Nishikawa, Fumihiro. Koike, Takashi Kagawa, Hajime Tanuma

    5nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2006.10.15

    Venue：Barcelona, Spain  

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  • EUV光源用Sn, Xeの詳細原子モデル

    佐々木明、西原功修、砂原淳、*西川亘、小池文博、香川貴司、田沼肇

    日本物理学科２００６年秋季大会 

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    Event date： 2006.9.23

    Venue：千葉大学西千葉キャンパス  

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  • レーザー生成プラズマからの極端紫外光発生の２次元シミュレーションII

    砂原淳、西原功修、佐々木明、西川亘、青田達也、山浦道照、藤岡慎介、島田義則、西村博明、宮永憲明、井澤靖和、三間国興

    第６７回応用物理学会学術講演会 

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    Event date： 2006.8.30

    Venue：立命館大学びわこ・くさつキャンパス  

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  • EUV光源の原子過程モデルの高精度化

    佐々木明、西原功修、砂原淳、西川亘、香川貴司、小池文博、田沼肇

    第６７回応用物理学会学術講演会 

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    Event date： 2006.8.30

    Venue：立命館大学びわこ・くさつキャンパス  

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  • Xe, Snプラズマの原子モデル改良の課題

    佐々木明、西原功修、前原宏昭、砂原淳、*西川亘、小池文博、香川貴司、田沼肇

    応用物理学会 

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    Event date： 2006.3.24

    Venue：武蔵工業大学世田谷キャンパス  

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  • LPP EUV光源のターゲット材料としてのスズ、およびスズ化合物の理論解析

    *西川亘、砂原淳、佐々木明、西原功修

    応用物理学会 

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    Event date： 2006.3.24

    Venue：武蔵工業大学世田谷キャンパス  

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  • レーザー生成プラズマからの極端紫外光発生の２次元放射流体シミュレーション

    砂原淳、西原功修、佐々木明、*西川亘、古河裕之、前原宏昭、山浦道照、藤岡慎介、島田義則、西村博明、宮永憲明、井澤靖和、三間圀興

    応用物理学会 

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    Event date： 2006.3.24

    Venue：武蔵工業大学世田谷キャンパス  

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  • Analysis of the emission spectrum of Xe and Sn

    A. Sasaki, K. Nishihara, F. Koike, T. Kagawa, *T. Nishikawa, A. Sunahara, H. Tanuma

    SPIE microlithography 2006 

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    Event date： 2006.2.23

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  • レーザープラズマによるEUVリソグラフィー用光源の開発

    宮永憲明他31名30番目

    レーザー学会学術講演会第２７回年次大会 

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    Event date： 2006.1.17

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  • Characteristics of Emission Lines from Xe, Sn, and Other Species at EUV Region

    F. Koike, K. Nishihara, A. Sunahara, H. Maehara, *T. Nishikawa, A. Sasaki, T. Kagawa, H. Tanuma

    4nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2005.11.7 - 2005.11.9

    Venue：San Diego, CA, USA  

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  • High Conversion to 13.5 nm EUV and Debris Mitigation with Mass-limited Plasmas Generated with Laser

    Hiroaki Nishimura他24人14番目

    4nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2005.11.7 - 2005.11.9

    Venue：San Diego, CA, USA  

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  • Progress in LPP EUV Source Development by Japan MEXT Project

    Yasukazu Izawa他23人18番目

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    Event date： 2005.11.7 - 2005.11.9

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  • Radiative properties of Xe and Sn plasmas

    A. Sasaki, K. Nishihara, A. Sunahara, H. Maehara, *T. Nishikawa, F. Koike, T. Kagawa, H. Tanuma

    4nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2005.11.7 - 2005.11.9

    Venue：San Diego, CA, USA  

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  • Theoretical Modeling and Optimization of LPP EUV Light Source

    K. Nishihara他23人12番目

    4nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2005.11.7 - 2005.11.9

    Venue：San Diego, CA, USA  

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  • Physics of laser-produced Li plasma EUV light source

    *T. Nishikawa, A. Sunahara, A. Sasaki, K. Nishihara

    4nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2005.11.7 - 2005.11.9

    Venue：San Diego, CA, USA  

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  • EUV光源プラズマの原子モデルの特性

    佐々木明、西原功修、前原宏昭、*西川亘、砂原淳、小池文博、田沼肇

    日本物理学会 

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    Event date： 2005.9.19

    Venue：同志社大学京田辺キャンパス  

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  • 時間依存の原子過程を含んだレーザーアブレーションのシミュレーション

    古河裕之、佐々木明、*西川亘、西原功修、三間圀興

    日本物理学会 

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    Event date： 2005.9.19

    Venue：同志社大学京田辺キャンパス  

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  • Xe, Snプラズマのemissivity, opacityの特性

    佐々木明、西原功修、前原宏昭、砂原淳、*西川亘、小池文博、香川貴司、田沼肇

    応用物理学会 

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    Event date： 2005.9.10

    Venue：徳島大学 常三島キャンパス  

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  • レーザー生成EUVプラズマからの高エネルギー粒子に関する考察

    古河裕之、佐々木明、*西川亘、藤岡慎介、西村博明、西原功修、宮永憲明、井澤靖和、三間圀興、山中千代衛

    応用物理学会 

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    Event date： 2005.9.10

    Venue：徳島大学 常三島キャンパス  

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  • 輻射励起を考慮したレーザー生成プラズマからのEUV光発生特性

    前原宏昭、西原功修、砂原淳、古河裕之、佐々木明、*西川亘

    応用物理学会 

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    Event date： 2005.9.10

    Venue：徳島大学 常三島キャンパス  

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  • 小委員会活動による教育改善活動・・・岡山大学工学部電気電子工学科

    小西正躬、藤原耕二、金範錫、佐薙稔、*西川亘、石山武、野木茂次

    電気学会教育フロンティア研究会 

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    Event date： 2005.8.4

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  • EUV光源のターゲット材料としてのリチウムの理論解析

    *西川亘、蒲田康平、古河裕之、砂原淳、佐々木明、西原功修

    応用物理学会 

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    Event date： 2005.3.31

    Venue：埼玉大学  

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  • 輻射流体シミュレーションによるレーザー生成プラズマからの極端紫外光放射特性解析

    砂原淳、西原功修、蒲田幸平、前原宏昭、佐々木明、*西川亘、古河裕之、島田義則、山浦道照、陶業争、内田成明、藤岡慎介、西村博明、宮永憲明、井澤靖和

    応用物理学会 

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    Event date： 2005.3.31

    Venue：埼玉大学  

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  • 詳細原子モデルによるXe, Snプラズマのemissivity, opacity

    佐々木明、西原功修、蒲田幸平、砂原淳、*西川亘、小池文博、香川貴司、田沼肇

    応用物理学会 

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    Event date： 2005.3.31

    Venue：埼玉大学  

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  • 種々のターゲット物質のEUV変換効率と輻射輸送

    蒲田幸平、西原功修、砂原淳、古河裕之、佐々木明、*西川亘、河村徹

    応用物理学会 

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    Event date： 2005.3.31

    Venue：埼玉大学  

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  • LPP-UEV光における輻射励起・電離の効果

    前原宏昭、西原功修、蒲田幸平、砂原淳、古河裕之、佐々木明、*西川亘

    応用物理学会 

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    Event date： 2005.3.31

    Venue：埼玉大学  

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  • LPP-EUV光源から発生する光速イオンの速度分布モデルリング

    村上匡且、姜永光、西原功修、西村博明、藤岡慎介、陶業争、山浦道照、長井圭治、内田成明、宮永憲明、砂原淳、*西川亘、佐々木明、井澤靖和

    応用物理学会 

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    Event date： 2005.3.31

    Venue：埼玉大学  

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  • レーザー生成EUV Xeプラズマからの高エネルギー粒子に関する考察

    古河裕之、河村徹、*西川亘、佐々木明、藤間一美、藤岡慎介、西村博明、西原功修、宮永憲明、井澤靖和、山中千代衛

    応用物理学会 

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    Event date： 2005.3.31

    Venue：埼玉大学  

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  • EUV放射プラズマのオパシティー構造と放射効率の関係

    藤岡慎介、西村博明、奥野智晴、島田義則、橋本和久、一木理史、重森啓介、中井光男、陶業争、上田修義、安藤強史、谷勤翠、長井圭治、乗松孝好、佐々木明、*西川亘、砂原淳、西原功修、宮永憲明、井澤靖和田沼肇

    日本物理学会 

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    Event date： 2005.3.24

    Venue：東京理科大学野田キャンパス  

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  • EUV光源用Xe, Snプラズマの原子過程モデリング

    佐々木明、西原功修、蒲田幸平、*西川亘、砂原淳、小池文博、香川貴司、田沼肇

    日本物理学会 

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    Event date： 2005.3.24

    Venue：東京理科大学野田キャンパス  

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  • Estiamtions on high energy ions and neutral particles from LPP EUV light sources

    H. Furukawa, T. Kawamura, *T. Nishikawa, A. Sasaki, K. Fujima, S. Fujioka, H. Nishimura, K. Nishihara, N. Miyanaga, Y. Izawa, C. Yamanaka

    SPIE 30th Annual International Symposium on Microlithography 

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    Event date： 2005.2.27 - 2005.3.4

    Venue：San Jose  

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  • Modeling of the atomic processes in the laser-plamsa EUV sources

    A. Sasaki, K. Nishihaar, F. Koike, K. Kagawa, H. Tanuma, A. Sunahara, K. Gamada, *T. Nishikawa

    SPIE 30th Annual International Symposium on Microlithography 

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    Event date： 2005.2.27 - 2005.3.4

    Venue：San Jose  

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  • EUV light source design by Li target LPP

    *T. Nishikawa, K. Gamada, K. Nishihara

    EUVL Source Workshop 

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    Event date： 2005.2.27

    Venue：San Jose, USA  

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  • レーザー生成スズプラズマからのEUV光発生の放射流体シミュレーション

    砂原淳、西原功修、蒲田幸平、*西川亘、佐々木明、古河裕之、島田義則、山浦道照、内田成明、藤岡慎介、西村博明、宮永憲明、井澤靖和

    プラズマ・核融合学会第２１回年会 

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    Event date： 2004.11.24

    Venue：静岡コンベンションアーツセンター「グランシップ」  

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  • 新しい遮蔽水素モデルを用いたEUV放射プラズマの原子過程モデル

    *西川亘、佐々木明、砂原淳、古河裕之、西原功修

    プラズマ・核融合学会第２１回年会 

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    Event date： 2004.11.24

    Venue：静岡コンベンションアーツセンター「グランシップ」  

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  • Modeling of LPP EUV Light Source at Japan MEXT Leading Project

    K. Nishihara他21名11番目

    3nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2004.11.1 - 2004.11.4

    Venue：Miyazaki, Japan  

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  • Atomic models for radiation transport in laser plasma hydrodynamic simulation of EUV light source

    *Takeshi Nishikawa, Akira Sasaki, Hiroyuki Furukawa, Atsushi Sunahara, and Katsunobu Nishihara

    3nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2004.11.1 - 2004.11.4

    Venue：Miyazaki, Japan  

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  • Experimental Database of LPP EUV Sources at ILE and ILT

    N. Miyanaga他28人27番目

    3nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2004.11.1 - 2004.11.4

    Venue：Miyazaki, Japan  

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  • Numerical Analysis of Extreme Ultra-Violet Emission from Laser-Produced Tin Plasmas

    Atsushi Sunahara他14人3番目

    3nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2004.11.1 - 2004.11.4

    Venue：Miyazaki, Japan  

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  • The Role of Interference and Correlations in 13.5 nm Radiations of Sn and Xe Atomic Ions -- For Precise and Accurate Determination of Sprctral

    F. Koike, K. Nishihara, A. Sasaki, T. Kagawa, *T. Nishikawa, K. Fujima, T. Kawamura, and H. Furukawa

    3nd International Extreme Ultra-Violet Lithography (EUVL) Symposium 

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    Event date： 2004.11.1 - 2004.11.4

    Venue：Miyazaki, Japan  

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  • Atomic Data for Laser Produced Plasma Extreme Ultra Violet Light Source

    K. Nishihara他21人11番目

    Joint Meeting 14th International Toki Conference on Plasma Physics and Controlled Nuclear Fusion 4th International Conference on Atomic and Molecular Data and Their Applications 

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    Event date： 2004.10.5 - 2004.10.8

    Venue：Toki, Gifu, Japan  

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  • Precise and Accurate Calculations of Electronic Transitions in Heavy Atomic Ions Relevant to Extreme Ultra-Violet Light Sources

    F. Koike, K. Nishihara, A. Sasaki, T. Kagawa, *T. Nishikawa, K. Fujima, T. Kawamura, H. Furukawa

    Joint Meeting 14th International Toki Conference on Plasma Physics and Controlled Nuclear Fusion 4th International Conference on Atomic and Molecular Data and Their Applications 

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    Event date： 2004.10.5 - 2004.10.8

    Venue：Toki, Gifu, Japan  

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  • EUV光源プラズマの原子過程モデルと流体シミュレーション

    *西川亘、砂原淳、佐々木明、古河裕之、西原功修

    日本物理学会 

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    Event date： 2004.9.12

    Venue：青森大学  

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  • Interference effects in correlated transitions of heavy atomic ions

    F. Koike, K. Nishihara, A. Sasaki, T. Kagawa, *T. Nishikawa, K. Fujima, T. Kawamura, H. Furukawa

    12th International Conference on the Physics of Highly Charged Ions 

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    Event date： 2004.9.6 - 2004.9.11

    Venue：Vilnus, Lithuania  

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  • パワーバランス解析モデルを用いたEUV2%BWへの変換効率の考察

    蒲田幸平、西原功修、砂原淳、古河裕之、佐々木明、*西川亘、河村徹

    応用物理学会 

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    Event date： 2004.9.2

    Venue：東北学院大学（泉キャンパス）  

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  • EUV光源プラズマ流体シミュレーションのための原子過程モデルとデータセット

    *西川亘、佐々木明、古河裕之、砂原淳、西原功修

    応用物理学会 

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    Event date： 2004.9.2

    Venue：東北学院大学（泉キャンパス）  

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  • 輻射流体シミュレーションによるEUV放射の波長依存性の解析

    砂原淳、西原功修、*西川亘、佐々木明、古河裕之、蒲田幸平、山浦道照、藤岡慎介、島田義則、内田成明、橋本和久、西村博明、井澤靖和

    応用物理学会 

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    Event date： 2004.9.2

    Venue：東北学院大学（泉キャンパス）  

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  • Xe,Snプラズマの詳細原子モデル

    佐々木明、西原功修、砂原淳、*西川亘

    応用物理学会 

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    Event date： 2004.9.2

    Venue：東北学院大学（泉キャンパス）  

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  • Simulations on laser ablation and its applications

    Hiroyuki Furukawa, Tohru Kawamura, Atsushi Sunahara, *Takeshi Nishikawa, Katsunobu Nishihara, Chiyoe Yamanaka

    High-Power Laser Ablation 2004 

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    Event date： 2004.4.25 - 2004.4.30

    Venue：Taos, New Mexico, USA  

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  • n, l分離を含んだ新しい遮蔽水素モデル

    西川亘

    日本物理学会 

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    Event date： 2004.3.30

    Venue：九州大学箱崎キャンパス  

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  • EUV光源プラズマのスペクトルの構造の解析

    佐々木明、西原功修、西村博明、河村徹、砂原淳、古河裕之、西川亘、小池文博、藤間一美、香川貴司、加藤隆子、R. More

    日本物理学会 

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    Event date： 2004.3.30

    Venue：九州大学箱崎キャンパス  

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  • 相変化、詳細なレーザー吸収過程を考慮したEUVプラズマ輻射流体シミュレーション

    古河裕之、河村徹、砂原淳、島田義則、山浦道照、西川亘、蒲太幸平、西原功修、宮永憲明、井澤靖和

    応用物理学会 

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    Event date： 2004.3.30

    Venue：東京工科大学  

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  • 輻射流体シミュレーションによるレーザー生成プラズマからのEUV放射の解析

    砂原淳、西川亘、古河裕之、河村徹、蒲太幸平、西原功修、島田義則、藤岡慎介、西村博明、宮永憲明、山浦道照、内田成明、井澤靖和

    応用物理学会 

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    Event date： 2004.3.30

    Venue：東京工科大学  

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  • 自然科学の楽しさを伝えたい?岡山大学サイエンス・スクールの試み?

    長屋智之、奈良重俊、*西川亘、山下信彦、稲田佳彦、味野道信、木村吉伸

    電気学会教育フロンティア研究会 

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    Event date： 2004.3.4

    Venue：岡山  

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  • Estimation of emission efficiency for laser-produced EUV-plasmas

    T. Kawamura, K. Fujima, F. Koike, H. Furukawa, A. Sunahara, T. Nishikawa, A. Sasaki, T. Kagawa, R. More, M. Murakami, V. Zhakhovskii, T. Fujimoto, H. Tanuma, K. Nishihara

    SPIE 29th Annual International Symposium on Microlithography 

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    Event date： 2004.2.26

    Venue：anta Clara, CA, USA  

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  • Theoretical simulation of extreme UV radiation source for lithography

    K. Fujima, K. Nishihara, T. Kawamura, H. Furukawa, T. Kagawa, F. Koike, R. More, M. Murakami, T. Nishikawa, A. Sasaki, A. Sunahara, V. Zhakhovskii, T. Fujimoto, H. Tanuma

    SPIE 29th Annual International Symposium on Microlithography 

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    Event date： 2004.2.25

    Venue：anta Clara, CA, USA  

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  • Atomic models and hydrodynamic simulation for laser-plasma EUV source

    Takeshi Nishikawa, Akira Sasaki, Hiroyuki Furukawa, Atsushi Sunahara, Katsunobu Nishihara

    EUVL Source Workshop 

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    Event date： 2004.2.22

    Venue：Santa Clara, USA  

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  • 輻射流体コードによるEUV放射の数値シミュレーション

    砂原淳、古河裕之、河村徹、西川亘、村上匡且、西原功修、宮永憲明、井澤靖和

    プラズマ・核融合学会年会 

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    Event date： 2003.11.28

    Venue：茨城県立県民文化センター  

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  • レーザー生成プラズマからの極短紫外線(EUV)放射特性

    西村博明他36名中25番目

    プラズマ・核融合学会年会 

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    Event date： 2003.11.28

    Venue：茨城県立県民文化センター  

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  • EUV光源開発のためのレーザーアブレーション輻射流体シミュレーション

    古河裕之、河村徹、砂原淳、西川亘、藤間一美、西原功修、宮永憲明、井澤靖和

    プラズマ・核融合学会年会 

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    Event date： 2003.11.23

    Venue：茨城県立県民文化センター  

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  • Simulation of the EUV spectrum of Xe and Sn plasmas

    N. Miyanaga他36名のうち19番目

    Progress in Understanding of Laser-Produced Plasmas for EUV Source 16th Annual Meeting of IEEE, Laser and Electro-Optics Society, (LEOS2003) 

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    Event date： 2003.10.27 - 2003.10.30

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  • Laser-Produced-Plasma for EUV Light Source for Lithography

    K. Nishihara他36名の2番目

    Ultrashort high-energy radiation and matter 

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    Event date： 2003.10.7 - 2003.10.10

    Venue：Varenna, Italy  

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  • Radiation Hydrodynamic Simulation of Laser-Produced Plasma for EUVL

    A. Sunahara, H. Furukawa, T. Kawamura, T. Nishikawa, M. Murakami, K. Nishihara

    2nd International Extreme UltraViolet Symposium 

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    Event date： 2003.9.30 - 2003.10.2

    Venue：Antwerp, Belgium  

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  • Japan MEXT Leading Project for Laser-Produced-Plasma EUV Light Source Development

    K. Nishihara他36名の10番目

    2nd International Extreme UltraViolet Symposium 

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    Event date： 2003.9.30 - 2003.10.2

    Venue：Antwerp, Belgium  

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  • Characterization of EUV Emission from Laser Produced Low-Density Tin-oxidized plasmas

    H. Nishimura他17名の17番目

    2nd International Extreme UltraViolet Symposium 

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    Event date： 2003.9.30 - 2003.10.2

    Venue：Antwerp, Belgium  

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  • Experimental Study on Basic Properties of Laser-Produced Plasma as an EUV Source on GEKKO XII

    M. Nakai他24名の24番目

    2nd International Extreme UltraViolet Symposium 

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    Event date： 2003.9.30 - 2003.10.2

    Venue：Antwerp, Belgium  

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  • Evaluation of Emission Efficiency at 13.5-nm EUV Source form One-Dimensional Spherical Plasma without Lateral Heat Transport an Density Gradient

    M. Yamaura他23名23番目

    2nd International Extreme Ultra-Violet Lithography Symposium 

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    Event date： 2003.9.30 - 2003.10.2

    Venue：Antwerp, Belgium  

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  • Dependence of EUV Emission Properties on Drive Laser Wavelength

    M. Yamaura他23名の23番目

    2nd International Extreme UltraViolet Symposium 

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    Event date： 2003.9.30 - 2003.10.2

    Venue：Antwerp, Belgium  

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  • EUV光源開発のためのレーザーアブレーション輻射流体シミュレーション

    古河裕之、河村徹、砂原淳、西川亘、藤間一美、佐々木明、村上匡且、西原功修、宮永憲明、井澤靖和

    応用物理学会 

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    Event date： 2003.9.30

    Venue：福岡大学  

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  • EUV光源プラズマ流体シミュレーションのための簡便な平均イオンモデル

    西川亘、古河裕之、砂原淳、西原功修

    応用物理学会 

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    Event date： 2003.9.30

    Venue：福岡大学  

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  • Theoretical Modeling of Laser-Produced Plasma for Development of Extreme UV Radiation Source for Lithography

    K. Nishihara, *T. Nishikawa, A. Sasaki, T. Kawamura, A. Sunahara, H. Furukawa, M. Murakami, R. More, K. Fujima, F. Koike, T. Kagawa, V. Zhakhovskii, T. Kato, H. Tanuma, H. Nishimura, M. Nakai, 他20名

    International Conference of Fusion Science 2003 

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    Event date： 2003.9.7 - 2003.9.12

    Venue：Monterey  

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  • 岡山大学電気電子工学科における実験科目への取り組み?物理学実験?

    小笠原悟司、藤原耕二、鶴田健二、佐薙稔、山下善文、石山武、西竜志、*西川亘、東辻千枝子、宮城大輔、小松原均、中野正典、安原清隆

    電気学会教育フロンティア研究会資料FIE-03-13 

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    Event date： 2003.5.30

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  • EUV光源開発のためのXeイオンのエネルギー準位の評価

    古河裕之、香川貴司、小池文博、佐々木明、藤間一美、西川亘、More Richard、西原功修

    第５０回応用物理学関係連合講演会 

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    Event date： 2003.3.29

    Venue：横浜  

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  • XeプラズマのEUVスペクトルの理論解析

    佐々木明、西原功修、西村博明、古河裕之、西川亘、藤間一美、More Richard、小池文博、香川貴司

    第５０回応用物理学関係連合講演会 

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    Event date： 2003.3.29

    Venue：横浜  

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  • 水熱量計を用いた交流電力測定の学生実験

    西川亘、数乗有、八田和道、藤田英明

    日本物理学会 

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    Event date： 2002.3.25

    Venue：草津  

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  • イオンポテンシャルを考慮したプラズマ中自由電子の状態密度II

    西川亘、数乗有、八田和道、藤田英明

    日本物理学会 

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    Event date： 2002.3.24

    Venue：草津  

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  • イオンポテンシャルを考慮したプラズマ中自由電子の状態密度

    西川 亘

    日本物理学会 

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    Event date： 2001.9.19

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  • Simple atomic model based on the plasma microfield

    Takeshi NISHIKAWA

    Second International Conference on Inertial Fusion Sciences and Applications 

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    Event date： 2001.9.13

    Venue：Kyoto  

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  • Novel Laboratory Fusion Sources

    T. Kenmotsu*, T. Nishikawa, R. More* *核融合科学研究所

    Second International Conference on Inertial Fusion Sciences and Applications 

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    Event date： 2001.9.10

    Venue：Kyoto  

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  • 水熱量計を用いた交流電力測定の学生実験

    西川亘、数乗有、八田和道、藤田英明

    電気・情報関連学会中国支部第５２回連合大会講演論文集 

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    Event date： 2001.4

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  • 半古典近似を用いた原子モデルII

    西川 亘

    日本物理学会 

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    Event date： 2001.3.29

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  • 半古典近似を用いた原子モデ

    西川 亘

    日本物理学会 

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    Event date： 2001.3.25

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  • プラズマ効果の原子素過程への要素還元

    西川 亘

    日本物理学会 

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    Event date： 2001.3.24

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  • シュタルク効果に基づく高励起状態数の計算

    西川亘

    日本物理学会 

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    Event date： 1999.9.25

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Research Projects

  • Development of lightweight artificial muscle with polymer threads and carbon nanotube yarn towards true human support

    Grant number：19K21946  2019.06 - 2021.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Exploratory)

    Hayashi Yasuhiko

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    Grant amount：\6370000 （ Direct expense: \4900000 、 Indirect expense：\1470000 ）

    To realize an artificial muscle that stretches and contracts elastomeric yarns using Joule heat generated by applying an electric current to carbon nanotube (CNT) webs, the concept of a "stiff" actuator mechanism, which has been developed so far, cannot be used. The elastic modulus of the CNTs is larger than that of the elastomer, which prevents the elastomeric yarn from stretching and thus prevents the elastomeric yarn from stretching sufficiently. In order to solve this problem, we proposed a method of wrapping CNT webs around elastomeric yarns, and by optimizing the fabrication procedures, we were able to achieve higher force generation than that of bio-muscular or nylon 6,6 yarns.

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  • Development of ultra high strength more than 6GPa ultra light wegiht carbon nanotube spun yarn

    Grant number：18H01708  2018.04 - 2021.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    HAYASHI Yasuhiko

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    Grant amount：\17810000 （ Direct expense: \13700000 、 Indirect expense：\4110000 ）

    In this study, carbon nanotube (CNT) yarns were fabricated from tall and high-density, few-walled CNT forest synthesized on the substrate by dry spinning method to achieve CNT yarns with tensile strength exceeding the strength of carbon fibers, which is a benchmark for practical use. The shape and diameter change of the catalytic metal particles from room temperature to the initial temperature of CNT synthesis was clarified, which enabled the selective synthesis of double-layer CNTs. We also found that the removal of residual amorphous carbon and the structural change to graphene occurred simultaneously when the entire CNT yarn was heated by joule heating in vacuum and extreme ethane gas. Furthermore, by using a spinning technique to orient the CNTs in one direction, a high strength of over 2.5 GPa was achieved.

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  • Modeling of structure formation in the intial stage of laser plasma interaction and its application to the study of EUV source

    Grant number：26610195  2014.04 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Sasaki Akira

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    Grant amount：\3120000 （ Direct expense: \2400000 、 Indirect expense：\720000 ）

    Theoretical investigation of the particle emission from short pulse laser irradiated solid targets is carried out, and simulation code is developed, for its application to the analysis of laser pumped plasma (LPP) Extreme Ultra-Violet (EUV) light source.
    We develop the algorithms for the reorganization of mesh, along the distribution of the material, for the 2 dimensional Lagrangian hydrodynamics model. Furthermore, the liquid-to-gas transition is taken into account firstly by determining the ratio of volumes of liquid and gas region corresponding to the average temperature and density, and secondly by splitting the target cell and redistributing the mass and internal energy to the divided cells. Test calculations are carried out for uniformly heated tin cylinder to show the initial bubble formation to subsequent decomposition of the target into particles.

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  • Investigation of phase transition processes arises from atomic and radiative property of plasmas for EUV and X-ray laser applications

    Grant number：23340185  2011.04 - 2014.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    SASAKI Akira, NISHIHARA Katsunobu, SUNAHARA Atsushi, FURUKAWA Hiroyuki, NISHIKAWA Takeshi, KOIKE Fumihiro

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    Grant amount：\17550000 （ Direct expense: \13500000 、 Indirect expense：\4050000 ）

    We investigate the mechanism of formation of the inhomogeneous structure in laser produced plasmas and discharge plasmas, by taking the phase transition processes into account, which originate from atomic and radiative properties of plasmas. We develop a detailed atomic model of tungsten, which is interested in fusion plasmas. The size of the model is parameterized, and accuracy of the calculation of mean charge and radiative power loss is improved by sensitivity studies and benchmark calculations. We also investigate percolation transition in discharge plasmas. We investigate development of discharge in SF6 based on its material properties such as ionization and attachment coefficient to reproduce experimental observations from initial partial discharge to later growth of the stepped leader to cause breakdown. By combining both atomic model, radiative transfer model and phase transition model understanding of structure formation in the plasmas will be improved.

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  • Development of an integrated model of the hybrid pumping plasma light source based on laser assisted discharge

    Grant number：20340166  2008 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    SASAKI Akira, NISHIHARA Katsunobu, SUNAHARA Atsushi, FURUKAWA Hiroyuki, KOIKE Fumihiro, NISHIKAWA Takeshi, KAI Takeshi, NUNAMI Masanori

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    Grant amount：\17030000 （ Direct expense: \13100000 、 Indirect expense：\3930000 ）

    Modeling methods of laser-plasma hybrid pumping plasma light sources are investigated. On the modeling of plasma atomic processes, a model, which calculates level population, emissivity and opacity of the plasma with a reasonable accuracy and is capable of reproducing emission spectrum, is developed. Calculated dependence of the plasma radiation pressure, which shows non-monotonic behavior with respect to density, suggests instability of the plasmas. The model is also applied to evaluate the emission characteristics of Tb plasma for future EUV applications. On the modeling of plasma radiation hydrodynamics, importance of modeling methods, which can calculate the temporal and spatial structure formation, is discussed. Instead of existing MHD and other fluid and particle approach, it is found that using the percolation model, the initial structure of the discharge can be reproduced.

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  • Control and Information Processing Functions using Chaotic Dynamics in Neural Network Model and Cellular Automata

    Grant number：16500131  2004 - 2006

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    NARA Shigetoshi, NAGAYA Tomoyuki, KUROIWA Jousuke, NISHIKAWA Takeshi

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    Grant amount：\3400000 （ Direct expense: \3400000 ）

    It is shown that complex dynamics including chaos can be useful in realizing of complex functions and complex control by means of simple rule (s) . The two computer experiments have been done. One is to use a neural network model and the other is to use cellular automata The former enables us to understand a possible mechanism of memory dynamics in brain and excellent control observed in biological control. The latter enables us not only to analyze complexity contained in sound signal, music and voices, but also to compress data in completely reversible way. Using the neural network model, computer experiment to solve two-dimensional maze which is set as a typical ill-posed problem was done. The performance is evaluated by numerical methods. A plan of hardware implementation is proposed. All works were reported in conference meetings and were submitted to several scientific or engineering journals.

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  • Observation of One-dimensional Spinodal Decomposition in a Liquid Crystal

    Grant number：15540371  2003 - 2004

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    NAGAYA Tomoyuki, NARA Shigetoshi, NISHIKAWA Takeshi

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    Grant amount：\3600000 （ Direct expense: \3600000 ）

    The zigzag instability coarsening of a splay-bend wall formed in a nematic liquid crystal under external fields is investigated experimentally as a study of a one-dimensional analog of the spinodal decomposition in a conserved order parameter system. When an electric field is applied on the liquid crystal, a sinusoidal modulation first appears, then the shape of wall changes to zigzag. In the late stage, the coarsening of zigzag vertexes proceeds due to the coalescence of zigzag vertexes.
    1.In the late stage of coarsening, a characteristic length, i.e.the mean width of the zigzag period, shows logarithmic increase in time, which agrees with the theoretical prediction.
    2.The structure function and the correlation function for the Ising domain and the density correlation of zinzag vertexes are analyzed. Then it is clarified that the dynamical scaling law holds in the late stage of coarsening.
    3.The kink-antikink kinetics of one-dimensional phase ordering is studied numerically. The logarithmic growth of the mean width of domains is also confirmed. The distribution of domain size and the correlation function are shown to satisfy a scaling relation. The two-time autocorrelation function follows a power law whose exponent depends on the start time of the calculation.
    4.The time evolution of the sinusoidal modulation in the early stage of coarsening is analyzed experimentally. It is found that the sinusoidal modulation develops exponentially up to an equilibrium value as expected in the theory of spinodal decomposition. Basing our study on the linear stability analysis of the splay-bend wall equation of motion, the growth rate of the sinusoidal modulation is discussed. In the vicinity of the zigzag instability, the experimental result agrees with the prediction form the linear stability analysis.

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  • Ion Cluster Model for Super-Dense Plasmas

    Grant number：07680508  1995 - 1996

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    FURUTANI Yoichiro, TKABE Hideaki, NISHIKAWA Takeshi, FUKUYAMA Atsushi, TOTSUJI Hiroo

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    Grant amount：\1200000 （ Direct expense: \1200000 ）

    With recourse to the Thomas-Fermi-Dirac-Weizasacker (TFDW) statistical model of atoms, based on the Density Functional Theory (DFT), we have carried out numerical analysis of the internal structure of compressed atoms, diatomic and triatomic molecules, the smallest candidates for the ion cluster, immersed in such dense matters as a laser-imploded plasma.
    1. DFT for compressed diatomic molecules
    Substituting as an initial input the effective potential for a diatomic molecule into the potential-energy term of the two-dimensional Kohn-Sham equation and coupling it with Poisson's equation, we solve them by iterative method to obtain the one-electron state (DFT). We have concentrated only to the analytical aspect of the problem, expounded in the attached research report. As for numerical analysis, a relevant code is not completely explored yet, so that no numerical result is available at present.
    2. Formulation of the triatomic molecule
    With regards the ion cluster model, we have formulated the problem of the triatomic molecule, considered as the smallest example of the ion cluster, the content of which we present in the attached research report. Since the triatomic molecule loses whatsoever symmetry, numerical analysis turns out to be three-dimensional. Though a formal extension of the two-dimensional code to the three-dimensional one within the free-boundary finite difference scheme is straightforward, the latter code can not be handled by Workstation of our group. We envisage a tight collaboration with the theoretical group of ILE (Osaka University) which disposes of a high-quality supercomputer.
    3. Analysis of the two-temperature model of heavy atoms
    As was already explained in the brief report of the 1996 fiscal year, the two-temperature model is a model out of equilibrium, composed of closed shells at their ground state and the peripheral clad electron gas at finite temperatures. After the presentation, with success, at the 12th International Conference on Laser Interaction and Related Plasma Phenomena on April 1995, the reults was published in J.PHys.Soc.Jpn. (Vol.65, No.8, pp.2463-2471).
    4. Analysis of the Thomas-Fermi (TF) atom in super-intense magnetic fields
    It is conjectured that there exist super-intense magnetic fields of the order of 10^<12> to 10^<14> Gausss on pulsar surfaces and of the order of 10^6 to 10^8 Gauss on the surface of a laser-imploded plasma due to the anisotropic compression. We have carried out numerical analysis of the internal structure of spherically symmetric TF atoms at their ground stae, subject to such super-intense magnetic fields. Extention of the TF to the TFDW atoms, by inclusion of the gradient correction of the elctron density and of the exchange-correlation potentials, is now in progress. A solution of the Kohn-Sham equation applied to a strongly magnetized TFDW atoms is also envisaged in view of distinguishing spherical from non-spherical atomic shapes.

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  • レーザー生成高ZプラズマからのX線輻射輸送に関する理論的研究

    Grant number：05780359  1993

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    西川 亘

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    Grant amount：\900000 （ Direct expense: \900000 ）

    ハートリー・フォック・スレーターモデル(HFS)を用いて、レーザー照射によって生成されたプラズマ中に存在する部分電離高Zイオンのエネルギー凖位と振動子強度を計算するコードを作成した。従来の流体コード中で用いられている放射、吸収係数を計算した原子モデルのうち、金プラズマの束縛-束縛遷移の遷移エネルギーと振動子強度について、HFSモデルの計算結果と比較した。
    束縛-束縛過程の遷移エネルギーについては、流体コード中で用いられている簡単なPerrotのモデルでも最大で15%程度の違いに収まることがわかった。しかしながら、金などの高Zイオンでは内部量子数(j)が違うことによるエネルギー凖位の分離が無視できないほど大きいことがわかった。主量子数と方位量子数で分けた従来のモデルで得られるエネルギー凖位は、実際には内部量子数の違う2つのエネルギー凖位に分かれ、その結果、従来のモデルでは含めることのできていない束縛-束縛遷移があることがわかった。現在その効果を入れた平均イオンモデルを作成中である。
    吸収振動子強度は同じ殻の束縛電子の電子数が変化しても単調な変化をし、従来の流体コード中で用いられているモデルでは開殻の電子数が少ないイオンではよく一致していることを確認した。しかしながら、殻の電子数が変化しても同じ値を用いているため、殻に電子がほとんど詰まっている閉殻に近い状態では、正確な値からの差が拡大し、最大100%程度の違いがあることがわかった。特に、低電離プラズマのシミュレーションをする場合にはこの傾向は大きくなり改善する必要があることがわかった。

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  • オパシティーの理論・数値計算に関する研究

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  • Atomic Modeling based on semi-classical theory

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  • Study on theory and numerical calulation of Opacity

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  • 半古典近似を用いた原子モデル

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