Nobuaki Sato
KEK
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Publication
Featured researches published by Nobuaki Sato.
International Journal of Modern Physics D | 1999
Kazuaki Kuroda; Masatake Ohashi; Shinji Miyoki; Daisuke Tatsumi; Shuichi Sato; Hideki Ishizuka; Masa Katsu Fujimoto; Seiji Kawamura; Ryutaro Takahashi; Toshitaka Yamazaki; Koji Arai; Mitsuhiro Fukushima; Koichi Waseda; Souichi Telada; Akitoshi Ueda; T. Shintomi; Akira Yamamoto; Toshikazu Suzuki; Yoshio Saito; T. Haruyama; Nobuaki Sato; Kimio Tsubono; Keita Kawabe; Masaki Ando; Ken-ichi Ueda; Hitoki Yoneda; Mitsuru Musha; Norikatsu Mio; Shigenori Moriwaki; Akito Araya
We present here the Large-scale Cryogenic Gravitational wave Telescope (LCGT) project which is aimed to improve the sensitivity of the existing gravitational wave projects by ten times. LCGT is the project constructing the km-scale gravitational wave detector in Japan succeeding the TAMA project, which adopts cryogenic mirrors with a higher power laser. We are planing to build it in an underground site in Kamioka mine. If its target sensitivity is attained, we will be able to catch a few events per month.
Journal of the Physical Society of Japan | 1986
M. Nakahata; Katsushi Arisaka; T. Kajita; M. Koshiba; Yuichi Oyama; A. Suzuki; M. Takita; Y. Totsuka; T. Kifune; T. Suda; Nobuaki Sato; Kasuke Takahashi; K. Miyano
The main source of background for nucleon decay experiments is the interaction of atmospheric neutrinos in the detector. To estimate this background a Monte Carlo program was developed, which simulates the neutrino interactions and the nuclear effects of secondary pions. The program reproduced existing neutrino data as well as global features of the contained events in the KAMIOKA nucleon decay experiment. Neutrino induced background for nucleon decay was then calculated.
Physics Letters A | 1998
Takashi Uchiyama; Daisuke Tatsumi; Takayuki Tomaru; M.E. Tobar; Kazuaki Kuroda; T. Suzuki; Nobuaki Sato; Akira Yamamoto; T. Haruyama; T. Shintomi
Abstract The sensitivity of large-scale interferometric gravitational wave detectors currently under construction will be limited by thermal noise in the mirror-suspension system. Cryogenic cooling is made difficult because of the necessarily high laser power (5 kW) incident on the mirrors. An all sapphire system of high conductivity and low loss has been developed. Experiments confirm that mirrors for the TAMA detector could be cooled to as low as 14.5 K. This represents two orders of magnitude reduction in the mirror-suspension thermal noise energy.
Physical Review D | 2006
Kazuhiro Yamamoto; Shinji Miyoki; Takashi Uchiyama; Hideki Ishitsuka; Masatake Ohashi; Kazuaki Kuroda; Takayuki Tomaru; Nobuaki Sato; Toshikazu Suzuki; T. Haruyama; Akira Yamamoto; T. Shintomi; Kenji Numata; Koichi Waseda; Kazuhiko Ito; Koji Watanabe
We have measured the mechanical loss of a dielectric multilayer reflective coating (ion-beam sputtered
Classical and Quantum Gravity | 2003
Kazuaki Kuroda; Masatake Ohashi; Shinji Miyoki; Takashi Uchiyama; Hideki Ishitsuka; Kazuhiro Yamamoto; K. Kasahara; M. K. Fujimoto; Seiji Kawamura; Ryutaro Takahashi; Toshitaka Yamazaki; Koji Arai; Daisuke Tatsumi; Akitoshi Ueda; Mitsuhiro Fukushima; Shuichi Sato; Shigeo Nagano; Y. Tsunesada; Zong Hong Zhu; T. Shintomi; Akira Yamamoto; T. Suzuki; Yoshio Saito; T. Haruyama; Nobuaki Sato; Yasuo Higashi; Takayuki Tomaru; Kimio Tsubono; Masaki Ando; A. Takamori
{\mathrm{SiO}}_{2}
Classical and Quantum Gravity | 2006
Shinji Miyoki; Takashi Uchiyama; Kazuhiro Yamamoto; Masatake Ohashi; Kazuaki Kuroda; Tomotada Akutsu; S. Kamagasako; Noriyasu Nakagawa; Masao Tokunari; K. Kasahara; Souichi Telada; Takayuki Tomaru; T. Suzuki; Nobuaki Sato; T. Shintomi; T. Haruyama; Akira Yamamoto; Daisuke Tatsumi; Masaki Ando; Akito Araya; A. Takamori; Shuzo Takemoto; H Momose; H Hayakawa; Wataru Morii; Junpei Akamatsu
and
Classical and Quantum Gravity | 2009
Koji Arai; Ryutaro Takahashi; Daisuke Tatsumi; K. Izumi; Yaka Wakabayashi; H. Ishizaki; Mitsuhiro Fukushima; Toshitaka Yamazaki; M. K. Fujimoto; A. Takamori; Kimio Tsubono; R. DeSalvo; A. Bertolini; S. Márka; V. Sannibale; Takashi Uchiyama; O. Miyakawa; Shinji Miyoki; K. Agatsuma; Takanori Saito; Masatake Ohashi; Kenta Kuroda; I. Nakatani; Souichi Telada; Kazuhiro Yamamoto; Takayuki Tomaru; T. Suzuki; T. Haruyama; Nobuaki Sato; Akira Yamamoto
{\mathrm{Ta}}_{2}{\mathrm{O}}_{5}
Classical and Quantum Gravity | 2002
Kazuaki Kuroda; Masatake Ohashi; Shinji Miyoki; Hideki Ishizuka; C.T Taylor; Kazuhiro Yamamoto; O. Miyakawa; M. K. Fujimoto; Seiji Kawamura; Ryutaro Takahashi; Toshitaka Yamazaki; Koji Arai; Daisuke Tatsumi; Akitoshi Ueda; Mitsuhiro Fukushima; Shuichi Sato; Takakazu Shintomi; Akira Yamamoto; Toshikazu Suzuki; Yoshio Saito; T. Haruyama; Nobuaki Sato; Yasuo Higashi; Takashi Uchiyama; Takayuki Tomaru; Kimio Tsubono; Masaki Ando; A. Takamori; Kenji Numata; Ken-ichi Ueda
) in cooled mirrors. The loss was nearly independent of the temperature (
Classical and Quantum Gravity | 2004
Shinji Miyoki; Takashi Uchiyama; Kazuhiro Yamamoto; H Hayakawa; K. Kasahara; Hideki Ishitsuka; Masatake Ohashi; Kazuaki Kuroda; Daisuke Tatsumi; Souichi Telada; Masaki Ando; Takayuki Tomaru; T. Suzuki; Nobuaki Sato; T. Haruyama; Y Higashi; Y. Saito; Akira Yamamoto; T. Shintomi; Akito Araya; Shuzo Takemoto; Toshihiro Higashi; H Momose; Junpei Akamatsu; Wataru Morii
4\text{ }\text{ }\mathrm{K}\ensuremath{\sim}300\text{ }\text{ }\mathrm{K}
Classical and Quantum Gravity | 2003
Masatake Ohashi; Kazuaki Kuroda; Shinji Miyoki; Takashi Uchiyama; Kazuhiro Yamamoto; K. Kasahara; T. Shintomi; Akira Yamamoto; T. Haruyama; Yoshio Saito; Yasuo Higashi; T. Suzuki; Nobuaki Sato; Takayuki Tomaru; Daisuke Tatsumi; Souichi Telada; Masaki Ando; Akito Araya; Shuzo Takemoto; Toshihiro Higashi; H Momose; Junpei Akamatsu; Wataru Morii
), frequency, optical loss, and stress caused by the coating, and the details of the manufacturing processes. The loss angle was
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