研究者詳細 - 石野　宏和

The LiteBIRD Satellite Mission: Sub-Kelvin Instrument 査読

A. Suzuki, P. A.R. Ade, Y. Akiba, D. Alonso, K. Arnold, J. Aumont, C. Baccigalupi, D. Barron, S. Basak, S. Beckman, J. Borrill, F. Boulanger, M. Bucher, E. Calabrese, Y. Chinone, S. Cho, B. Crill, A. Cukierman, D. W. Curtis, T. de Haan, M. Dobbs, A. Dominjon, T. Dotani, L. Duband, A. Ducout, J. Dunkley, J. M. Duval, T. Elleflot, H. K. Eriksen, J. Errard, J. Fischer, T. Fujino, T. Funaki, U. Fuskeland, K. Ganga, N. Goeckner-Wald, J. Grain, N. W. Halverson, T. Hamada, T. Hasebe, M. Hasegawa, K. Hattori, M. Hattori, L. Hayes, M. Hazumi, N. Hidehira, C. A. Hill, G. Hilton, J. Hubmayr, K. Ichiki, T. Iida, H. Imada, M. Inoue, Y. Inoue, K. D. Irwin, H. Ishino, O. Jeong, H. Kanai, D. Kaneko, S. Kashima, N. Katayama, T. Kawasaki, S. A. Kernasovskiy, R. Keskitalo, A. Kibayashi, Y. Kida, K. Kimura, T. Kisner, K. Kohri, E. Komatsu, K. Komatsu, C. L. Kuo, N. A. Kurinsky, A. Kusaka, A. Lazarian, A. T. Lee, D. Li, E. Linder, B. Maffei, A. Mangilli, M. Maki, T. Matsumura, S. Matsuura, D. Meilhan, S. Mima, Y. Minami, K. Mitsuda, L. Montier, M. Nagai, T. Nagasaki, R. Nagata, M. Nakajima, S. Nakamura, T. Namikawa, M. Naruse, H. Nishino, T. Nitta, T. Noguchi, H. Ogawa, S. Oguri, N. Okada, A. Okamoto, T. Okamura, C. Otani, G. Patanchon, G. Pisano, G. Rebeiz, M. Remazeilles, P. L. Richards, S. Sakai, Y. Sakurai, Y. Sato, N. Sato, M. Sawada, Y. Segawa, Y. Sekimoto, U. Seljak, B. D. Sherwin, T. Shimizu, K. Shinozaki, R. Stompor, H. Sugai, H. Sugita, J. Suzuki, O. Tajima, S. Takada, R. Takaku, S. Takakura, S. Takatori, D. Tanabe, E. Taylor, K. L. Thompson, B. Thorne, T. Tomaru, T. Tomida, N. Tomita, M. Tristram, C. Tucker, P. Turin, M. Tsujimoto, S. Uozumi, S. Utsunomiya, Y. Uzawa, F. Vansyngel, I. K. Wehus, B. Westbrook, M. Willer, N. Whitehorn, Y. Yamada, R. Yamamoto, N. Yamasaki, T. Yamashita, M. Yoshida

Journal of Low Temperature Physics 193 ( 5-6 ) 1 - 9 2018年5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：Springer New York LLC

Inflation is the leading theory of the first instant of the universe. Inflation, which postulates that the universe underwent a period of rapid expansion an instant after its birth, provides convincing explanation for cosmological observations. Recent advancements in detector technology have opened opportunities to explore primordial gravitational waves generated by the inflation through “B-mode” (divergent-free) polarization pattern embedded in the cosmic microwave background anisotropies. If detected, these signals would provide strong evidence for inflation, point to the correct model for inflation, and open a window to physics at ultra-high energies. LiteBIRD is a satellite mission with a goal of detecting degree-and-larger-angular-scale B-mode polarization. LiteBIRD will observe at the second Lagrange point with a 400 mm diameter telescope and 2622 detectors. It will survey the entire sky with 15 frequency bands from 40 to 400 GHz to measure and subtract foregrounds. The US LiteBIRD team is proposing to deliver sub-Kelvin instruments that include detectors and readout electronics. A lenslet-coupled sinuous antenna array will cover low-frequency bands (40–235 GHz) with four frequency arrangements of trichroic pixels. An orthomode-transducer-coupled corrugated horn array will cover high-frequency bands (280–402 GHz) with three types of single frequency detectors. The detectors will be made with transition edge sensor (TES) bolometers cooled to a 100 milli-Kelvin base temperature by an adiabatic demagnetization refrigerator. The TES bolometers will be read out using digital frequency multiplexing with Superconducting QUantum Interference Device (SQUID) amplifiers. Up to 78 bolometers will be multiplexed with a single SQUID amplifier. We report on the sub-Kelvin instrument design and ongoing developments for the LiteBIRD mission.

DOI： 10.1007/s10909-018-1947-7

Frequency-Domain Multiplexing Readout with a Self-Trigger System for Pulse Signals from Kinetic Inductance Detectors 査読

Y. Yamada, H. Ishino, A. Kibayashi, Y. Kida, N. Hidehira, K. Komatsu, M. Hazumi, N. Sato, K. Sakai, H. Yamamori, F. Hirayama, S. Kohjiro

Journal of Low Temperature Physics 193 ( 3-4 ) 1 - 7 2018年4月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Springer New York LLC

We present the development of a frequency-domain multiplexing readout of kinetic inductance detectors (KIDs) for pulse signals with a self-trigger system. The KIDs consist of an array of superconducting resonators that have different resonant frequencies individually, allowing us to read out multiple channels in the frequency domain with a single wire using a microwave-frequency comb. The energy deposited to the resonators break Cooper pairs, changing the kinetic inductance and, hence, the amplitude and the phase of the probing microwaves. For some applications such as X-ray detections, the deposited energy is detected as a pulse signal shaped by the time constants of the quasiparticle lifetime, the resonator quality factor, and the ballistic phonon lifetime in the substrate, ranging from microseconds to milliseconds. A readout system commonly used converts the frequency-domain data to the time-domain data. For the short pulse signals, the data rate may exceed the data transfer bandwidth, as the short time constant pulses require us to have a high sampling rate. In order to overcome this circumstance, we have developed a KID readout system that contains a self-trigger system to extract relevant signal data and reduces the total data rate with a commercial off-the-shelf FPGA board. We have demonstrated that the system can read out pulse signals of 15 resonators simultaneously with about 10 Hz event rate by irradiating (Formula presented.) particles from (Formula presented.)Am to the silicon substrate on whose surface aluminum KID resonators are formed.

DOI： 10.1007/s10909-018-1911-6

Search for Neutrinos in Super-Kamiokande Associated with the GW170817 Neutron-star Merger 査読

Hayato, Y., Ikeda, M., Iyogi, K., Kameda, J., Kato, Y., Kishimoto, Y., Marti, Ll., Miura, M., Moriyama, S., Nakahata, M., Nakajima, Y., Nakano, Y., Nakayama, S., Orii, A., Pronost, G., Sekiya, H., Shiozawa, M., Sonoda, Y., Takeda, A., Takenaka, A., Tanaka, H., Tasaka, S., Yano, T., Akutsu, R., Kajita, T., Nishimura, Y., Okumura, K., Tsui, K.M., Labarga, L., Fernandez, P., Blaszczyk, F.d.M., Kachulis, C., Kearns, E., Raaf, J.L., Stone, J.L., Sulak, L.R., Berkman, S., Tobayama, S., Bian, J., Elnimr, M., Kropp, W.R., Locke, S., Mine, S., Weatherly, P., Smy, M.B., Sobel, H.W., Takhistov, V., Ganezer, K.S., Hill, J., Kim, J.Y., Lim, I.T., Park, R.G., Li, Z., O'Sullivan, E., Scholberg, K., Walter, C.W., Gonin, M., Imber, J., Mueller, Th.A., Ishizuka, T., Nakamura, T., Jang, J.S., Choi, K., Learned, J.G., Matsuno, S., Amey, J., Litchfield, R.P., Ma, W.Y., Uchida, Y., Wascko, M.O., Catanesi, M.G., Intonti, R.A., Radicioni, E., De Rosa, G., Ali, A., Collazuol, G., Ludovici, L., Cao, S., Friend, M., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Abe, KE., Hasegawa, M., Suzuki, A.T., Takeuchi, Y., Hayashino, T., Hirota, S., Jiang, M., Mori, M., Nakamura, KE., Nakaya, T., Wendell, R.A., Anthony, L.H.V., McCauley, N., Pritchard, A., Fukuda, Y., Itow, Y., Murase, M., Muto, F., Mijakowski, P., Frankiewicz, K., Jung, C.K., Li, X., Palomino, J.L., Santucci, G., Viela, C., Wilking, M.J., Yanagisawa, C., Fukuda, D., Ishino, H., Ito, S., Kibayashi, A., Koshio, Y., Nagata, H., Sakuda, M., Xu, C., Kuno, Y., Wark, D., Di Lodovico, F., Richards, B., Molina Sedgwick, S., Tacik, R., Kim, S.B., Cole, A., Thompson, L., Okazawa, H., Choi, Y., Ito, K., Nishijima, K., Koshiba, M., Suda, Y., Yokoyama, M., Calland, R.G., Hartz, M., Martens, K., Murdoch, M., Quilain, B., Simpson, C., Suzuki, Y., Vagins, M.R., Hamabe, D., Kuze, M., Okajima, Y., Yoshida, T., Ishitsuka, M., Martin, J.F., Nantais, C.M., Tanaka, H.A., Towstego, T., Konaka, A., Chen, S., Wan, L., Minamino, A.

Astrophys.J. 857 ( 1 ) 1 - 6 2018年4月

Atmospheric neutrino oscillation analysis with external constraints in Super-Kamiokande I-IV 査読

Abe, K., Bronner, C., Haga, Y., Hayato, Y., Ikeda, M., Iyogi, K., Kameda, J., Kato, Y., Kishimoto, Y., Marti, Ll., Miura, M., Moriyama, S., Nakahata, M., Nakajima, T., Nakano, Y., Nakayama, S., Okajima, Y., Orii, A., Pronost, G., Sekiya, H., Shiozawa, M., Sonoda, Y., Takeda, A., Takenaka, A., Tanaka, H., Tasaka, S., Tomura, T., Akutsu, R., Irvine, T., Kajita, T., Kametani, I., Kaneyuki, K., Nishimura, Y., Okumura, K., Richard, E., Tsui, K.M., Labarga, L., Fernandez, P., Blaszczyk, F.d. M., Gustafson, J., Kachulis, C., Kearns, E., Raaf, J.L., Stone, J.L., Sulak, L.R., Berkman, S., Tobayama, S., Goldhaber, M., Carminati, G., Elnimr, M., Kropp, W.R., Mine, S., Locke, S., Renshaw, A., Smy, M.B., Sobel, H.W., Takhistov, V., Weatherly, P., Ganezer, K.S., Hartfiel, B.L., Hill, J., Hong, N., Kim, J.Y., Lim, I.T., Park, R.G., Akiri, T., Himmel, A., Li, Z., O'Sullivan, E., Scholberg, K., Walter, C.W., Wongjirad, T., Ishizuka, T., Nakamura, T., Jang, J.S., Choi, K., Learned, J.G., Matsuno, S., Smith, S.N., Amey, J., Litchfield, R.P., Y., W., Ma., Uchida, Y., Wascko, M.O., Cao, S., Friend, M., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Abe, KE., Hasegawa, M., Suzuki, A.T., Takeuchi, Y., Yano, T., Hayashino, T., Hirota, S., Huang, K., Ieki, K., Jiang, M., Kikawa, T., Nakamura, KE., Nakaya, T., Patel, N.D., Suzuki, K., Takahashi, S., Wendell, R.A., Anthony, L.H. V., McCauley, N., Pritchard, A., Fukuda, Y., Itow, Y., Mitsuka, G., Murase, M., Muto, F., Suzuki, T., Mijakowski, P., Frankiewicz, K., Hignight, J., Imber, J., Jung, C.K., Li, X., Palomino, J.L., Santucci, G., Vilela, C., Wilking, M.J., Yanagisawa, C., Ito, S., Fukuda, D., Ishino, H., Kayano, T., Kibayashi, A., Koshio, Y., Mori, T., Nagata, H., Sakuda, M., Xu, C., Kuno, Y., Wark, D., Di Lodovico, F., Richards, B., Tacik, R., Kim, S.B., Cole, A., Thompson, L., Okazawa, H., Choi, Y., Ito, K., Nishijima, K., Koshiba, M., Totsuka, Y., Suda, Y., Yokoyama, M., Calland, R.G., Hartz, M., Martens, K., Quilain, B., Simpson, C., Suzuki, Y., Vagins, M.R., Hamabe, D., Kuze, M., Yoshida, T., Ishitsuka, M., Martin, J.F., Nantais, C.M., de Perio, P., Tanaka, H.A., Konaka, A., Chen, S., Wan, L., Zhang, Y., Wilkes, R.J., Minamino, A.

Phys.Rev.D 97 ( 7 ) 072001 - 072001 2018年4月

Prototype design and evaluation of the nine-layer achromatic half-wave plate for the LiteBIRD low frequency telescope

Kunimoto Komatsu, Tomotake Matsumura, Masashi Hazumi, Hiroaki Imada, Hirokazu Ishino, Nobuhiko Katayama, Yuki Sakurai, Hajime Sugai, Ryota Takaku

MILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY IX 10708 ( 1070847 ) 1 - 17 2018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）出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING

LiteBIRD is a satellite project to measure the polarization of the CMB with an unprecedented accuracy. LiteBIRD observes all sky for three years at the sun-earth second Lagrange point. The goal of LiteBIRD is to observe the B-mode polarization at large angular scales and to measure the tensor-to-scaler ratio r with an accuracy less than 0.001, exploring the energy scale of the inflation. In order to mitigate the system 1/f noise and systematics, we plan to use continuous rotating half-wave plates (HWPs) as a polarization modulator at each aperture of two telescopes. One of the telescopes, called a low frequency telescope (LFT), covers the frequency range from 34 to 270 GHz, requiring the HWP to have a high modulation efficiency in the wide bandwidth. We employ a Pancharatnam-type achromatic HWP (AHWP) to achieve the broadband coverage. The AHWP consists of nine layer stacked HWPs with the optic axes mutually rotated by the angles optimized for the LFT bandwidth. In this paper, we report our development status of the nine layer AHWP and measurement results on the modulation efficiency and the phase as a function of frequency.

DOI： 10.1117/12.2312431

The optical design and physical optics analysis of a cross-Dragonian telescope for LiteBIRD

Hiroaki Imada, Tadayasu Dotani, Takashi Hasebe, Masashi Hazumi, Junji Inatani, Hirokazu Ishino, Shingo Kashima, Nobuhiko Katayama, Kimihiro Kimura, Tomotake Matsumura, Ryo Nagata, Yutaro Sekimoto, Hajime Sugai, Aritoki Suzuki, Shin Utsunomiya

SPACE TELESCOPES AND INSTRUMENTATION 2018: OPTICAL, INFRARED, AND MILLIMETER WAVE 10698 2018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）出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING

The Lite satellite for the studies of B-mode polarization and Inflation from the cosmic microwave background (CMB) Radiation Detection (LiteBIRD) is a next generation CMB satellite dedicated to probing the inflationary universe. It has two telescopes, Low Frequency Telescope (LFT) and High Frequency Telescope (HFT) to cover wide observational bands from 34 GHz to 448 GHz. In this presentation, we report the optical design and characterization of the LFT. We have used the CODE-V to obtain the LFT optical design based on a cross-Dragonian telescope. It is an image-space telecentric system with an F number of 3.5 and 20 x 10 degrees(2) field of view. The main, near and far side lobes at far-field have been calculated by using a combination of HFSS and GRASP 10. It is revealed that the LFT telescope has good main lobe properties to satisfy the requirements. On the other hand, the side lobes are affected by the stray light that stems from the triple reflection and the direct path from feed. In order to avoid the stray light, the way to block these paths is now under study.

DOI： 10.1117/12.2312185

Prototype demonstration of the broadband anti-reflection coating on sapphire using a sub-wavelength structure

T. Matsumura, R. Takaku, S. Hanany, H. Imada, H. Ishino, N. Katayama, Y. Kobayashi, K. Komatsu, K. Konishi, M. Kuwata-Gonokami, S. Nakamura, H. Sakurai, Y. Sakurai, Q. Wen, K. Young, J. Yumoto

2018 29th IEEE International Symposium on Space Terahertz Technology, ISSTT 2018 54 - 60 2018年

掲載種別：研究論文（国際会議プロシーディングス）

© 2018 29th IEEE International Symposium on Space Terahertz Technology, ISSTT 2018.All Rights Reserved. We report the development of the broadband antireflection (AR) coating on sapphire using a sub-wavelength structure for a cosmic microwave background (CMB) polarization experiment. One of the challenges in the CMB polarization experiment is to disentangle the sources of the polarized emission among the CMB and the galactic emissions from our Galaxy. This leads a need of a cryogenically compatible broadband AR coating on a millimeter wave optical element used in a CMB telescope. We design and fabricate the AR subwavelength structure using a laser machining on a sapphire plate, which is a commonly used material as a half-wave plate at millimeter wavelength. We fabricate a prototype sample and evaluate the transmittance of an SWS AR sapphire for the fractional bandwidth of about 1.5. We show the agreement between the measured transmittance and the prediction based on the fabricated shape. The projected transmittance based on the measurement achieves above 90% above 50 GHz. We finally discuss the room of the improvement and the applicability for this technology for a future CMB polarization experiment.

Current design of the electrical architecture for the payload module of LiteBIRD

M. Tsujimoto, H. Nishino, M. Hazumi, Y. Sekimoto, T. Dotani, H. Ishino, A. Kibayashi, Y. Sakurai, T. Matsumura, M. Dobbs, J. F. Cliche, G. Smecher, A. Suzuki, A. T. Lee, K. Arnold, L. Montier, B. Mot, G. Signorelli, P. De Bernardis

Proceedings of SPIE - The International Society for Optical Engineering 10698 2018年

掲載種別：研究論文（国際会議プロシーディングス）

© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. LiteBIRD is a space-borne project for mapping the anisotropy of the linear polarization of the cosmic microwave background (CMB). The project aims to measure the B-mode pattern in a large angular scale to test the cosmic inflation theory. It is currently in the design phase lead by an international team of Japan, US, Canada, and Europe. We report the current status of the design of the electrical architecture of the payload module of the satellite, which is based on the heritages of other cryogenic space science missions using bolometers or microcalorimeters.

DOI： 10.1117/12.2311579

Bandpass mismatch error for satellite CMB experiments I: estimating the spurious signal 査読

Duc Thuong Hoang, Guillaume Patanchon, Martin Bucher, Tomotake Matsumura, Ranajoy Banerji, Hirokazu Ishino, Masashi Hazumi, Jacques Delabrouille

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS 11 ( 11 ) 1 - 26 2017年12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：IOP PUBLISHING LTD

Future Cosmic Microwave Background (CMB) satellite missions aim to use the B mode polarization to measure the tensor-to-scalar ratio r with a sensitivity sigma(r) less than or similar to 10(-3). Achieving this goal will not only require sufficient detector array sensitivity but also unprecedented control of all systematic errors inherent to CMB polarization measurements. Since polarization measurements derive from differences between observations at different times and from different sensors, detector response mismatches introduce leakages from intensity to polarization and thus lead to a spurious B mode signal. Because the expected primordial B mode polarization signal is dwarfed by the known unpolarized intensity signal, such leakages could contribute substantially to the final error budget for measuring r. Using simulations we estimate the magnitude and angular spectrum of the spurious B mode signal resulting from bandpass mismatch between different detectors. It is assumed here that the detectors are calibrated, for example using the CMB dipole, so that their sensitivity to the primordial CMB signal has been perfectly matched. Consequently the mismatch in the frequency bandpass shape between detectors introduces difference in the relative calibration of galactic emission components. We simulate using a range of scanning patterns being considered for future satellite missions. We find that the spurious contribution to r from reionization bump on large angular scales (l < 10) is approximate to 107 assuming large detector arrays and 20 percent of the sky masked. We show how the amplitude of the leakage depends on the angular coverage per pixels that results from the scan pattern.

DOI： 10.1088/1475-7516/2017/12/015

Search for an Excess of Events in the Super-Kamiokande Detector in the Directions of the Astrophysical Neutrinos Reported by the IceCube Collaboration 査読

K. Abe e, l, Super-Kamiokande Collaboration

ASTROPHYSICAL JOURNAL 850 ( 2 ) 1 - 7 2017年12月

Search for nucleon decay into charged antilepton plus meson in 0.316 megaton$\cdot$years exposure of the Super-Kamiokande water Cherenkov detector 査読

Abe, K., Hayato, Y., Ikeda, M., Iyogi, K., Kameda, J., Kishimoto, Y., Marti, Ll., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Okajima, Y., Orii, A., Sekiya, H., Shiozawa, M., Sonoda, Y., Takeda, A., Tanaka, H., Tasaka, S., Tomura, T., Akutsu, R., Kajita, T., Kaneyuki, K., Nishimura, Y., Okumura, K., Tsui, K.M., Labarga, L., Fernandez, P., Blaszczyk, F.d.M., Gustafson, J., Kachulis, C., Kearns, E., Raaf, J.L., Stone, J.L., Sulak, L.R., Berkman, S., Tobayama, S., Goldhaber, M., Elnimr, M., Kropp, W.R., Mine, S., Locke, S., Weatherly, P., Smy, M.B., Sobel, H.W., Takhistov, V., Ganezer, K.S., Hill, J., Kim, J.Y., Lim, I.T., Park, R.G., Himmel, A., Li, Z., O'Sullivan, E., Scholberg, K., Walter, C.W., Ishizuka, T., Nakamura, T., Jang, J.S., Choi, K., Learned, J.G., Matsuno, S., Smith, S.N., Friend, M., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Nakano, Y., Suzuki, A.T., Takeuchi, Y., Yano, T., Cao, S.V., Hayashino, T., Hiraki, T., Hirota, S., Huang, K., Jiang, M., Minamino, A., Nakaya, T., Quilain, B., Patel, N.D., Wendell, R.A., Fukuda, Y., Itow, Y., Muto, F., Mijakowski, P., Frankiewicz, K., Jung, C.K., Li, X., Palomino, J.L., Santucci, G., Vilela, C., Wilking, M.J., Yanagisawa, C., Fukuda, D., Ishino, H., Kibayashi, A., Koshio, Y., Nagata, H., Sakuda, M., Xu, C., Kuno, Y., Tacik, R., Kim, S.B., Okazawa, H., Choi, Y., Ito, K., Nishijima, K., Koshiba, M., Totsuka, Y., Suda, Y., Yokoyama, M., Bronner, C., Calland, R.G., Hartz, M., Martens, K., Suzuki, Y., Vagins, M.R., Martin, J.F., Nantais, C.M., Tanaka, H.A., Konaka, A., Chen, S., Wan, L., Zhang, Y., Wilkes, R.J.

Phys.Rev.D 96 ( 1 ) 012003 - 012003 2017年7月

Development of an Optical Coupling with Ground-Side Absorption for Antenna-Coupled Kinetic Inductance Detectors 査読

Hiroki Watanabe, Satoru Mima, Shugo Oguri, Mitsuhiro Yoshida, Masashi Hazumi, Hirokazu Ishino, Hikaru Ishitsuka, Atsuko Kibayashi, Chiko Otani, Nobuaki Sato, Osamu Tajima, Nozomu Tomita

IEICE TRANSACTIONS ON ELECTRONICS E100C ( 3 ) 298 - 304 2017年3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：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG

Antenna-coupled kinetic inductance detectors (KIDs) have recently shown great promise as microwave detection systems with a large number of channels. However, this technique, still has difficulties in eliminating the radiation loss of the resonator signals. To solve this problem, we propose a design in which the absorption area connected to an antenna is located on the ground-side of a coplanar waveguide. Thereby, radiation loss due to leakage from the resonator to the antenna can be considerably reduced. This simple design also enables the use of a contact aligner for fabrication. We have developed KIDs with this design, named as the ground-side absorption (GSA)-KIDs and demonstrated that they have higher quality factors than those of the existing KIDs, while maintaining a good total sensitivity.

DOI： 10.1587/transele.E100.C.298

SEARCH for NEUTRINOS in SUPER-KAMIOKANDE ASSOCIATED with GRAVITATIONAL-WAVE EVENTS GW150914 and GW151226 査読

K. Abe, K. Haga, Y. Hayato, M. Ikeda, K. Iyogi, J. Kameda, Y. Kishimoto, M. Miura, S. Moriyama, M, Nakahata,T, Nakajima, Y. Nakano, S. Nakayama, A. Orii, H. Sekiya, M. Shiozawa, A. Takeda, H. Tanaka, S. Tasaka, T. Tomura, R. Akutsu, T. Kajita, K. Kaneyuki, Y. Nishimura,E. Rich

Astrophysical Journal Letters 830 ( 1 ) 1 - 6 2016年10月

Solar Neutrino Measurements in Super-Kamiokande-IV 査読

Abe, K., Haga, Y., Hayato, Y., Ikeda, M., Iyogi, K., Kameda, J., Kishimoto, Y., Marti, Ll., Miura, M., Moriyama, S., Nakahata, M., Nakajima, T., Nakayama, S., Orii, A., Sekiya, H., Shiozawa, M., Sonoda, Y., Takeda, A., Tanaka, H., Takenaga, Y., Tasaka, S., Tomura, T., Ueno, K., Yokozawa, T., Akutsu, R., Irvine, T., Kaji, H., Kajita, T., Kametani, I., Kaneyuki, K., Lee, K.P., Nishimura, Y., McLachlan, T., Okumura, K., Richard, E., Labarga, L., Fernandez, P., Blaszczyk, F.d.M., Gustafson, J., Kachulis, C., Kearns, E., Raaf, J.L., Stone, J.L., Sulak, L.R., Berkman, S., Tobayama, S., Goldhaber, M., Bays, K., Carminati, G., Griskevich, N.J., Kropp, W.R., Mine, S., Renshaw, A., Smy, M.B., Sobel, H.W., Takhistov, V., Weatherly, P., Ganezer, K.S., Hartfiel, B.L., Hill, J., Keig, W.E., Hong, N., Kim, J.Y., Lim, I.T., Park, R.G., Akiri, T., Albert, J.B., Himmel, A., Li, Z., O'Sullivan, E., Scholberg, K., Walter, C.W., Wongjirad, T., Ishizuka, T., Nakamura, T., Jang, J.S., Choi, K., Learned, J.G., Matsuno, S., Smith, S.N., Friend, M., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Nishikawa, K., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Nakano, Y., Suzuki, A.T., Takeuchi, Y., Yano, T., Cao, S.V., Hayashino, T., Hiraki, T., Hirota, S., Huang, K., Ieki, K., Jiang, M., Kikawa, T., Minamino, A., Murakami, A., Nakaya, T., Patel, N.D., Suzuki, K., Takahashi, S., Wendell, R.A., Fukuda, Y., Itow, Y., Mitsuka, G., Muto, F., Suzuki, T., Mijakowski, P., Frankiewicz, K., Hignight, J., Imber, J., Jung, C.K., Li, X., Palomino, J.L., Santucci, G., Taylor, I., Vilela, C., Wilking, M.J., Yanagisawa, C., Fukuda, D., Ishino, H., Kayano, T., Kibayashi, A., Koshio, Y., Mori, T., Sakuda, M., Takeuchi, J., Yamaguchi, R., Kuno, Y., Tacik, R., Kim, S.B., Okazawa, H., Choi, Y., Ito, K., Nishijima, K., Koshiba, M., Totsuka, Y., Suda, Y., Yokoyama, M., Bronner, C., Calland, R.G., Hartz, M., Martens, K., Obayashi, Y., Suzuki, Y., Vagins, M.R., Nantais, C.M., Martin, J.F., de Perio, P., Tanaka, H.A., Konaka, A., Chen, S., Sui, H., Wan, L., Yang, Z., Zhang, H., Zhang, Y., Connolly, K., Dziomba, M., Wilkes, R.J.

Phys.Rev.D 94 ( 5 ) 052010 - 052010 2016年9月

Measurements of the atmospheric neutrino flux by Super-Kamiokande: energy spectra, geomagnetic effects, and solar modulation 査読

Richard, E., Okumura, K., Abe, K., Haga, Y., Hayato, Y., Ikeda, M., Iyogi, K., Kameda, J., Kishimoto, Y., Miura, M., Moriyama, S., Nakahata, M., Nakajima, T., Nakano, Y., Nakayama, S., Orii, A., Sekiya, H., Shiozawa, M., Takeda, A., H. A. Tanaka, Tomura, T., Wendell, R.A., Akutsu, R., Irvine, T., Kajita, T., Kaneyuki, K., Nishimura, Y., Luis Labarga, Fernandez, P., Gustafson, J., Kachulis, C., Kearns, E., Raaf, J.L., Stone, J.L., Sulak, L.R., Berkman, S., Nantais, C.M., H. A. Tanaka, Tobayama, S., Goldhaber, M., Kropp, W.R., Mine, S., Weatherly, P., Smy, M.B., Sobel, H.W., Takhistov, V., Ganezer, K.S., Hartfiel, B.L., Hill, J., Hong, N., Kim, J.Y., Lim, I.T., Park, R.G., Alexander Himmel, Li, Z., O'Sullivan, E., Scholberg, K., Walter, C.W., Wongjirad, T., Ishizuka, T., Tasaka, S., Jang, J.S., Learned, J.G., Matsuno, S., Smith, S.N., Friend, M., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Suzuki, A.T., Takeuchi, Y., Yano, T., Cao, S.V., Hiraki, T., Hirota, S., Huang, K., Kikawa, T., Minamino, A., Nakaya, T., Suzuki, K., Fukuda, Y., Choi, K., Itow, Y., Suzuki, T., Mijakowski, P., Frankiewicz, K., Hignight, J., Imber, J., Jung, C.K., Li, X., Palomino, J.L., Wilking, M.J., Yanagisawa, C., Fukuda, D., Ishino, H., Kayano, T., Kibayashi, A., Koshio, Y., Mori, T., Sakuda, M., Xu, C., Kuno, Y., Tacik, R., Kim, S.B., Okazawa, H., Choi, Y., Nishijima, K., Koshiba, M., Totsuka, Y., Suda, Y., Masashi Yokoyama, Bronner, C., Hartz, M., Martens, K., Marti, Ll., Suzuki, Y., Vagins, M.R., Martin, J.F., Konaka, A., Chen, S., Yang Zhang, Wilkes, R.J.

Phys.Rev.D 94 ( 5 ) 052001 - 052001 2016年9月

Measurements of the atmospheric neutrino flux by Super-Kamiokande: Energy spectra, geomagnetic effects, and solar modulation 査読

E. Richard, K. Okumura, K. Abe, Y. Haga, Y. Hayato, M. Ikeda, K. Iyogi, J. Kameda, Y. Kishimoto, M. Miura, S. Moriyama, M. Nakahata, T. Nakajima, Y. Nakano, S. Nakayama, A. Orii, H. Sekiya, M. Shiozawa, A. Takeda, H. Tanaka, T. Tomura, R. A. Wendell, R. Akutsu, T. Irvine, T. Kajita, K. Kaneyuki, Y. Nishimura, L. Labarga, P. Fernandez, J. Gustafson, C. Kachulis, E. Kearns, J. L. Raaf, J. L. Stone, L. R. Sulak, S. Berkman, C. M. Nantais, H. A. Tanaka, S. Tobayama, M. Goldhaber, W. R. Kropp, S. Mine, P. Weatherly, M. B. Smy, H. W. Sobel, V. Takhistov, K. S. Ganezer, B. L. Hartfiel, J. Hill, N. Hong, J. Y. Kim, I. T. Lim, R. G. Park, A. Himmel, Z. Li, E. O'Sullivan, K. Scholberg, C. W. Walter, T. Wongjirad, T. Ishizuka, S. Tasaka, J. S. Jang, J. G. Learned, S. Matsuno, S. N. Smith, M. Friend, T. Hasegawa, T. Ishida, T. Ishii, T. Kobayashi, T. Nakadaira, K. Nakamura, Y. Oyama, K. Sakashita, T. Sekiguchi, T. Tsukamoto, A. T. Suzuki, Y. Takeuchi, T. Yano, S. V. Cao, T. Hiraki, S. Hirota, K. Huang, T. Kikawa, A. Minamino, T. Nakaya, K. Suzuki, Y. Fukuda, K. Choi, Y. Itow, T. Suzuki, P. Mijakowski, K. Frankiewicz, J. Hignight, J. Imber, C. K. Jung, X. Li, J. L. Palomino, M. J. Wilking, C. Yanagisawa, D. Fukuda, H. Ishino, T. Kayano, A. Kibayashi, Y. Koshio, T. Mori, M. Sakuda, C. Xu, Y. Kuno, R. Tacik, S. B. Kim, H. Okazawa, Y. Choi, K. Nishijima, M. Koshiba, Y. Totsuka, Y. Suda, M. Yokoyama, C. Bronner, M. Hartz, K. Martens, Ll. Marti, Y. Suzuki, M. R. Vagins, J. F. Martin, A. Konaka, S. Chen, Y. Zhang, R. J. Wilkes

PHYSICAL REVIEW D 94 ( 5 ) 1 - 31 2016年9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：AMER PHYSICAL SOC

A comprehensive study of the atmospheric neutrino flux in the energy region from sub-GeV up to several TeV using the Super-Kamiokande (SK) water Cherenkov detector is presented in this paper. The energy and azimuthal spectra, and variation over time, of the atmospheric nu(e) + (nu) over bar (e) and nu(mu) + (nu) over bar (mu) fluxes are measured. The energy spectra are obtained using an iterative unfolding method by combining various event topologies with differing energy responses. The azimuthal spectra depending on energy and zenith angle, and their modulation by geomagnetic effects, are also studied. A predicted east-west asymmetry is observed in both the nu(e) and nu(mu) samples at 8.0 sigma and 6.0 sigma significance, respectively, and an indication that the asymmetry dipole angle changes depending on the zenith angle was seen at the 2.2 sigma level. The measured energy and azimuthal spectra are consistent with the current flux models within the estimated systematic uncertainties. A study of the long-term correlation between the atmospheric neutrino flux and the solar magnetic activity cycle is performed, and a weak preference for a correlation was seen at the 1.1 sigma level, using SK-I-SK-IV data spanning a 20-year period. For several particularly strong solar activity periods, corresponding to Forbush decrease events, no theoretical prediction is available but a deviation below the typical neutrino event rate is seen at the 2.4 sigma level. The seasonal modulation of the neutrino flux is also examined, but the change in flux at the SK site is predicted to be negligible, and, as expected, no evidence for a seasonal correlation is seen.

DOI： 10.1103/PhysRevD.94.052001

Radiation Tolerance of Aluminum Microwave Kinetic Inductance Detector 査読

K. Karatsu, A. Dominjon, T. Fujino, T. Funaki, M. Hazumi, F. Irie, H. Ishino, Y. Kida, T. Matsumura, K. Mizukami, M. Naruse, T. Nitta, T. Noguchi, N. Oka, S. Sekiguchi, Y. Sekimoto, M. Sekine, S. Shu, Y. Yamada, T. Yamashita

JOURNAL OF LOW TEMPERATURE PHYSICS 184 ( 3-4 ) 540 - 546 2016年8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：SPRINGER/PLENUM PUBLISHERS

Microwave kinetic inductance detector (MKID) is one of the candidates of focal plane detector for future satellite missions such as LiteBIRD. For the space use of MKIDs, the radiation tolerance is one of the challenges to be characterized prior to the launch. Aluminum (Al) MKIDs with 50 nm thickness on silicon substrate and on sapphire substrate were irradiated with a proton beam of 160 MeV at the heavy ion medical accelerator in Chiba. The total water-equivalent absorbed dose was 10 krad which should simulate the worst radiation absorption of 5 years observation at the Lagrange point L2. We measured characteristics of these MKIDs before and after the irradiation. We found no significant changes on resonator quality factor, responsivity, and recombination time of quasi-particles. The change on electrical noise equivalent power was also evaluated, and no significant increase was found at the noise level of W/root Hz.

DOI： 10.1007/s10909-016-1523-y

LiteBIRD: Mission Overview and Focal Plane Layout 査読

T. Matsumura, Y. Akiba, K. Arnold, J. Borrill, R. Chendra, Y. Chinone, A. Cukierman, T. de Haan, M. Dobbs, A. Dominjon, T. Elleflot, J. Errard, T. Fujino, H. Fuke, N. Goeckner-wald, N. Halverson, P. Harvey, M. Hasegawa, K. Hattori, M. Hattori, M. Hazumi, C. Hill, G. Hilton, W. Holzapfel, Y. Hori, J. Hubmayr, K. Ichiki, J. Inatani, M. Inoue, Y. Inoue, F. Irie, K. Irwin, H. Ishino, H. Ishitsuka, O. Jeong, K. Karatsu, S. Kashima, N. Katayama, I. Kawano, B. Keating, A. Kibayashi, Y. Kibe, Y. Kida, K. Kimura, N. Kimura, K. Kohri, E. Komatsu, C. L. Kuo, S. Kuromiya, A. Kusaka, A. Lee, E. Linder, H. Matsuhara, S. Matsuoka, S. Matsuura, S. Mima, K. Mitsuda, K. Mizukami, H. Morii, T. Morishima, M. Nagai, T. Nagasaki, R. Nagata, M. Nakajima, S. Nakamura, T. Namikawa, M. Naruse, K. Natsume, T. Nishibori, K. Nishijo, H. Nishino, T. Nitta, A. Noda, T. Noguchi, H. Ogawa, S. Oguri, I. S. Ohta, C. Otani, N. Okada, A. Okamoto, A. Okamoto, T. Okamura, G. Rebeiz, P. Richards, S. Sakai, N. Sato, Y. Sato, Y. Segawa, S. Sekiguchi, Y. Sekimoto, M. Sekine, U. Seljak, B. Sherwin, K. Shinozaki, S. Shu, R. Stompor, H. Sugai, H. Sugita, T. Suzuki, A. Suzuki, O. Tajima, S. Takada, S. Takakura, K. Takano, Y. Takei, T. Tomaru, N. Tomita, P. Turin, S. Utsunomiya, Y. Uzawa, T. Wada, H. Watanabe, B. Westbrook, N. Whitehorn, Y. Yamada, N. Yamasaki, T. Yamashita, M. Yoshida, T. Yoshida, Y. Yotsumoto

JOURNAL OF LOW TEMPERATURE PHYSICS 184 ( 3-4 ) 824 - 831 2016年8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：SPRINGER/PLENUM PUBLISHERS

LiteBIRD is a proposed CMB polarization satellite project to probe the inflationary B-mode signal. The satellite is designed to measure the tensor-to-scalar ratio with a 68 % confidence level uncertainty of , including statistical, instrumental systematic, and foreground uncertainties. LiteBIRD will observe the full sky from the second Lagrange point for 3 years. We have a focal plane layout for observing frequency coverage that spans 40-402 GHz to characterize the galactic foregrounds. We have two detector candidates, transition-edge sensor bolometers and microwave kinetic inductance detectors. In both cases, a telecentric focal plane consists of approximately superconducting detectors. We will present the mission overview of LiteBIRD, the project status, and the TES focal plane layout.

DOI： 10.1007/s10909-016-1542-8