Masatake Ohashi
University of Tokyo
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Publication
Featured researches published by Masatake Ohashi.
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}
Physical Review Letters | 2012
Takashi Uchiyama; Shinji Miyoki; Souichi Telada; Kazuhiro Yamamoto; Masatake Ohashi; K. Agatsuma; Koji Arai; Masa-Katsu Fujimoto; T. Haruyama; Seiji Kawamura; O. Miyakawa; Naoko Ohishi; Takanori Saito; T. Shintomi; Toshikazu Suzuki; Ryutaro Takahashi; Daisuke Tatsumi
and
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
{\mathrm{Ta}}_{2}{\mathrm{O}}_{5}
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
) in cooled mirrors. The loss was nearly independent of the temperature (
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
4\text{ }\text{ }\mathrm{K}\ensuremath{\sim}300\text{ }\text{ }\mathrm{K}
Classical and Quantum Gravity | 2002
Takayuki Tomaru; Toshikazu Suzuki; Shinji Miyoki; Takashi Uchiyama; C. T. Taylor; Akira Yamamoto; Takakazu Shintomi; Masatake Ohashi; Kazuaki Kuroda
), frequency, optical loss, and stress caused by the coating, and the details of the manufacturing processes. The loss angle was
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\ensuremath{\sim}6)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}
Applied Optics | 1997
Akito Araya; Norikatsu Mio; Kimio Tsubono; Koya Suehiro; Souichi Telada; Masatake Ohashi; Masa-Katsu Fujimoto
. The temperature independence of this loss implies that the amplitude of the coating thermal noise, which is a severe limit in any precise measurement, is proportional to the square root of the temperature. Sapphire mirrors at 20 K satisfy the requirement concerning the thermal noise of even future interferometric gravitational wave detector projects on the ground, for example, LCGT.
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
The large-scale cryogenic gravitational wave telescope (LCGT) is the future project of the Japanese gravitational wave group. Two sets of 3 km arm length laser interferometric gravitational wave detectors will be built in a tunnel of Kamioka mine in Japan. LCGT will detect chirp waves from binary neutron star coalescence at 240 Mpc away with a S/N of 10. The expected number of detectable events in a year is two or three. To achieve the required sensitivity, several advanced techniques will be employed such as a low-frequency vibration-isolation system, a suspension point interferometer, cryogenic mirrors, a resonant side band extraction method, a high-power laser system and so on. We hope that the beginning of the project will be in 2005 and the observations will start in 2009.
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National Institute of Advanced Industrial Science and Technology
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