研究者詳細 - 植田　浩史

論文 - 植田　浩史

分割表示 161 件中 101 - 120 件目／全件表示 >>

医薬用タンパク質の超電導高勾配磁気分離装置の開発査読

植田浩史, 柁川一弘, 上岡泰晴, 我妻洸, 淵野修一郎, 古瀬充穂, 飯塚倫尋, 中村秀一

低温工学 49 ( 1 ) 25 - 34 2014年1月

Spatial and Temporal Behavior of Magnetic Field Distribution Due to Shielding Current in HTS Coil for Cyclotron Application 査読国際誌

Hiroshi Ueda, Mitsuhiro Fukuda, Kichiji Hatanaka, Tao Wang, Atsushi Ishiyama, So Noguchi

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 23 ( 3 ) 4100805 2013年6月

HTS magnet to polarize ultra cold neutrons

K. Hatanaka, M. Fukuda, N. Hamatani, K. Kamakura, T. Saito, H. Ueda, T. Yorita, Y. Yasuda, T. Kawaguchi

Proceedings of the 4th International Particle Accelerator Conference 3522 - 3524 2013年6月

Conceptual Design of Next Generation HTS Cyclotron 査読国際誌

Hiroshi Ueda, Mitsuhiro Fukuda, Kichiji Hatanaka, Tao Wang, Xudong Wang, Atsushi Ishiyama, So Noguchi, Shigeo Nagaya, Naoji Kashima, Nobuyuki Miyahara

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 23 ( 3 ) 4100205 2013年6月

Numerical simulation of screening current distribution in HTS tape of high field magnet 査読

Ryusei Itoh, Yuki Oga, So Noguchi, Hajime Igarashi, Hiroshi Ueda

Physica C: Superconductivity and its Applications 484 300 - 304 2013年1月

Quench Detection and Protection of Cryocooler-Cooled YBCO Pancake Coil for SMES 査読国際誌

Hiroshi Ueda, Atsushi Ishiyama, Kazuki Muromachi, Takahiro Suzuki, Koji Shikimachi, Naoki Hirano, Shigeo Nagaya

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 22 ( 3 ) 4702804 2012年6月

Transport and emittance study for 18 GHz superconducting-ECR ion source at RCNP 査読

T. Yorita, K. Hatanaka, M. Fukuda, H. Ueda, M. Kibayashi, S. Morinobu, A. Tamii

REVIEW OF SCIENTIFIC INSTRUMENTS 83 ( 2 ) 2012年2月

Developments of hts magnets

Kichiji Hatanaka, Mitsuhiro Fukuda, Nobuhiko Izumi, Takane Saito, Hiroshi Ueda, Tetsuhiko Yorita, Yuusuke Yasuda, Keita Kamakura, Noriaki Hamatani, Takeo Kawaguchi

IPAC 2012 - International Particle Accelerator Conference 2012 1095 - 1097 2012年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

We have been developing mgnets utilizing hightemperature superconducting (HTS) wiresfor a decade. We have investigated the performance of HTS wires excited by alternatingcurrents as well as direct currents. A scanning magnet was designed, fabricated, and testedfor its suitability as a beam scanner. After successful cooling tests, the magnetperformance was investigated in AC mode. The magnet was operated at frequencies of 10- 20Hzand 20K. The power loss dissipated in the coils was measured and compared with the modelcalculations. In order to check feasibilities of pulse magnet using HTS wire, we havefabricated a super-ferric dipole magnet to be operated by lumping currents. Preliminaryperformance is described. Copyright © 2012 by IEEE.

Scopus

researchmap

Evaluation of Positional Stability in Active Magnetic Levitation Using Spherical HTS Bulk for Inertial Nuclear Fusion 査読

Tao Wang, Hiroshi Ueda, Koh Agatsuma, Atsushi Ishiyama

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 21 ( 3 ) 1579 - 1583 2011年6月

Current Margin Against the Fault Current in REBCO Coated Conductors 査読

Atsusi Ishiyama, Hiroshi Momotari, Xudong Wang, Michio Arai, Hiroshi Ueda, Masayoshi Ohya, Kazuya Ohmatsu, Noboru Fujiwara

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 21 ( 3 ) 3033 - 3036 2011年6月

Degradation of YBCO Coated Conductors Due to an Over-Current Pulse 査読

Atsushi Ishiyama, Michio Arai, Hiroshi Momotari, Xudong Wang, Hiroshi Ueda, Takashi Saito, Yuji Aoki, Masashi Yagi, Takato Machi, Noboru Fujiwara

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 21 ( 3 ) 3025 - 3028 2011年6月

Quench Behavior and Protection in Cryocooler-Cooled YBCO Pancake Coil for SMES 査読

Atsushi Ishiyama, Hiroshi Ueda, Yoshiaki Aoki, Koji Shikimachi, Naoki Hirano, Shigeo Nagaya

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 21 ( 3 ) 2398 - 2401 2011年6月

Over-Current Characteristics of 275-kV Class YBCO Power Cable

Atsushi Ishiyama, Xudong Wang, Hiroshi Ueda, Toshikuni Uryu, Masashi Yagi, Noboru Fujiwara

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 21 ( 3 ) 1017 - 1020 2011年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

In Japan, a project for the development of a 275-kV class YBCO power cable started in 2008. High-temperature superconducting (HTS) power cables typically consist of a copper former, an HTS conductor layer, an electrical insulation layer, an HTS shield layer, and a copper shield layer. In practical applications, the 275-kV class transmission line may be subjected to short-circuit fault currents such as 63 kA(rms) for a duration of 0.6 s. Therefore, in order to ensure the stability and demonstrate the feasibility of the cable, it is important to estimate the current distribution and temperature increase under the fault condition. We designed the copper former, copper shield layer, and copper plating of the YBCO coated conductor carefully so as to fulfill the requirements of practical applications. In this study, we carried out over-current experiments on a 2-m long YBCO model cable and performed numerical simulations by a computer program developed using the finite element method (FEM) and an electric circuit model. We investigated the electromagnetic and thermal behaviors of the cable under fault conditions from the experimental and simulation results.

DOI： 10.1109/TASC.2010.2085413

Web of Science

researchmap

Development of high-quality intense proton beam at the rcnp cyclotron facility 査読

M. Fukuda, K. Hatanaka, T. Yorita, H. Yamamoto, T. Saito, H. Ueda, H. Tamura, M. Kibayashi, K. Nagayama, Y. Yasuda, S. Morinobu, S. Kurashima

IPAC 2011 - 2nd International Particle Accelerator Conference 2694 - 2696 2011年

掲載種別：研究論文（国際会議プロシーディングス）

An upgrade program for increase of beam intensity and improvement of beam quality is in progress at the cyclotron facility of Research Center for Nuclear Physics(RCNP). A 2.45 GHz ECR proton source was modified to increase 392 MeV proton beam intensity. Rated output power of a microwave power supply was increased from 200 W to 2 kW. A water-cooled waveguide system for high power microwave transfer is being installed for the proton source. A 15 keV proton beam with intensity of 0.6 mA was stably produced for output microwave power of 200 W. Emittance of 50 to 100 mm-mrad was obtained for 0.05 to 0.1 mA proton beams in the LEBT system. Beam transmission, defined by the ratio of the beam intensity between a Faraday cup placed in the axial injection beam line and an inflector electrode of the AVF cyclotron, was improved from 25 % for a 0.07 mA proton beam to more than 90 % for 0.03 mA, which indicated that the beam transmission was limited by the acceptance of the axial injection beam line. A new active gradient corrector is being designed for horizontal beam focusing in the extraction region of the AVF cyclotron and for reducing a beam loss at the vacuum chamber in the extraction region. An asymmetric dee voltage distribution at an acceleration gap is being analyzed for improvement of a flat-top acceleration system of the AVF cyclotron. Copyright © 2011 by IPAC'11/EPS-AG.

Scopus

researchmap

Design of hts sector magnets for the rcnp new injector cyclotron

Kichiji Hatanaka, Mitsuhiro Fukuda, Tetsuhiko Yorita, Hiroshi Ueda, Hitoshi Tamura, Mitsuru Kibayashi, Keichi Nagayama, Yuusuke Yasuda, Takane Saito, Shunpei Morinobu, Nobuhiko Izumi, Takeo Kawaguchi

IPAC 2011 - 2nd International Particle Accelerator Conference 2460 - 2462 2011年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

The RCNP cyclotron cascade system consists of K140 AVF cyclotron and K400 ring cyclotron and is providing high quality beams for various experiments. There are increasing demands for high intensity beams and even to improve the quality. In order to increase the physics research opportunities, a new injector cyclotron is recently proposed, which has four separated sector magnets and two accelerating cavities. Sector magnets are designed to use High Temperature Superconducting (HTS) wire. At RCNP we have been developing magnets with HTS wires for a decade. In this paper, we will report recent results of developed HTS magnets and the design of sector magnets for the new injector SSC. Copyright © 2011 by IPAC'11/EPS-AG.

Scopus

researchmap

Degradation characteristics of YBCO coated conductors due to fault-current in power cable applications 査読

H. Kono, X. Wang, H. Ueda, A. Ishiyama, T. Saitoh, Y. Aoki, M. Yagi, S. Mukoyama, N. Fujiwara

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 470 ( 20 ) 1334 - 1337 2010年11月

Design and evaluation of 66 kV class RE-123 superconducting cable 査読

T. Minamino, M. Ohya, H. Yumura, T. Masuda, T. Nagaishi, Y. Shingai, X. Wang, H. Ueda, A. Ishiyama, N. Fujiwara

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 470 ( 20 ) 1576 - 1579 2010年11月

Computer simulation of fault current characteristics in 275 kV class YBCO power cable 査読

S. Sato, X. Wang, H. Ueda, A. Ishiyama, M. Yagi, S. Mukoyama, T. Saitoh, Y. Aoki, N. Fujiwara

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 470 ( 20 ) 1572 - 1575 2010年11月

Numerical simulation on fault current condition in 66 kV class RE-123 superconducting cable 査読

X. Wang, H. Ueda, A. Ishiyama, M. Ohya, H. Yumura, N. Fujiwara

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 470 ( 20 ) 1580 - 1583 2010年11月

Determination of stabilizer thickness for YBCO coated conductors based on coil protection 査読

Y. Kawai, A. Ishiyama, H. Ueda, S. Nagaya, K. Shikimachi, N. Hirano

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 470 ( 20 ) 1865 - 1869 2010年11月

　前のページ - 次のページ　

<植田 浩史>

論文 - 植田 浩史

<植田　浩史>

論文 - 植田　浩史