Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Shigemi Otsuka"'
Publikováno v:
Journal of Physics: Conference Series. 32:451-456
A suspension point interferometer (SPI) is a high-performance active vibrationisolation scheme for laser interferometric gravitational wave detectors. By making use of auxiliary interferometers installed at the suspension points of the interferometer
Autor:
Shigemi Otsuka, Kenji Numata, Masaki Ando, Kazuhiro Yamamoto, Hidehiko Ishimoto, Keita Kawabe, Kimio Tsubono
Publikováno v:
Physics Letters A. 327:263-271
We systematically measured and compared the mechanical losses of various kinds of bulk fused silica. Their quality factors ranged widely from 7x10^5 to 4x10^7, the latter being one of the highest reported among bulk fused silica. We observed frequenc
Publikováno v:
Physics Letters A. 321:79-86
Our recent theoretical research [Phys. Lett. A 305 (2002) 18] showed that the actual thermal noise of mirrors with an inhomogeneous loss in interferometric gravitational wave detectors is largely different from the traditional evaluation by modal exp
Autor:
Akitoshi Ueda, Takashi Nakamura, Nobuki Kawashima, Masaki Ando, Shigeo Nagano, Ken'ichi Nakagawa, Koji Arai, Kozo Ueda, Norihiko Kamikubota, Masatake Ohashi, Akito Araya, Daisuke Tatsumi, Eiichi Mizuno, Nobuyuki Kanda, Atsushi Sekiya, Shigenori Moriwaki, Shinji Miyoki, Kuniharu Tochikubo, Mitsuru Musha, Ryutaro Takahashi, Takahiro Tanaka, Ken-ichi Ueda, Norikatsu Mio, Sumihiro Matsumura, Kazuaki Kuroda, N. Ohishi, Shuichi Sato, Misao Sasaki, Shoken M. Miyama, M. A. Barton, Nobuhiro Tsuda, Toshitaka Yamazaki, Hideki Ishizuka, Koichi Waseda, Takayuki Tomaru, Hideki Asada, Ken-ichi Oohara, Masaru Shibata, Osamu Miyakawa, Gen'ichi Horikoshi, Yujiro Ogawa, Akiteru Takamori, Kazuhiro Yamamoto, Yoshihide Kozai, Hideyuki Tagoshi, Shigemi Otsuka, Mitsuhiro Fukushima, Toshikazu Suzuki, Yasufumi Kojima, Keita Kawabe, Toshifumi Futamase, Ken-ichi Nakao, Shinsuke Taniguchi, Namio Matsuda, Seiji Kawamura, Takashi Uchiyama, Masa-Katsu Fujimoto, Kimio Tsubono, Yoshio Saito, Souichi Telada
Publikováno v:
Review of Scientific Instruments. 74:4176-4183
Laser frequency stabilization is essential for interferometric gravitational-wave detectors to attain their target sensitivity. We have designed a multistage laser frequency stabilization system which has been applied in the development of the TAMA 3
Publikováno v:
Classical and Quantum Gravity. 19:1689-1696
The normal modal expansion is the most frequently used method to estimate the thermal noise of interferometric gravitational wave detectors. However, the method does not agree with new estimation methods, direct approaches, when the loss is distribut
Publikováno v:
Classical and Quantum Gravity. 19:1697-1702
We systematically measured the intrinsic mechanical quality factors of 13 kinds of bulk fused silica from four companies using a nodal support system. Some of them have actually been adopted as mirror substrates in interferometric gravitational wave
Autor:
Kimio Tsubono, Shigemi Otsuka, Mitsuru Tanaka, Kenji Numata, Masaki Ando, Giuseppe Bertolotto Bianc, Keita Kawabe
Publikováno v:
Physics Letters A. 284:162-171
We measured the mechanical loss of crystalline anisotropic samples (silicon and sapphire) using a nodal support. The measured quality factor of the silicon sample reached 1.0×10 8 at room temperature. The sapphire sample showed lower quality factors
Autor:
Kimio Tsubono, Yoshio Saito, Akito Araya, Toshitaka Yamazaki, Souichi Telada, Osamu Miyakawa, Yasufumi Kojima, Hiromi Yakura, Kazuaki Kuroda, Akitoshi Ueda, Seiji Kawamura, Takashi Uchiyama, K. Oohara, Youich Aso, Shigemi Otsuka, Koichi Waseda, Kazuhiro Kondo, Ken-ichi Nakao, Nobuhiro Tsuda, Toshikazu Suzuki, Namio Matsuda, Yuko Watanabe, Yoshinori Kobayashi, Kuniharu Tochikubo, Satoshi Okutomi, Ken'ichi Nakagawa, Hideki Ishizuka, Yujiro Ogawa, Akiteru Takamori, Takahiro Tanaka, Norihiko Kamikubota, Kazuhiro Yamamoto, Ryutaro Takahashi, Daisuke Tatsumi, Naoko Ohishi, Hideki Asada, Yoshihide Kozai, Hideyuki Tagoshi, Masaki Ando, Mitsuru Musha, Takashi Nakamura, Norikatsu Mio, Shigeo Nagano, Keita Kawabe, Kazuyuki Miura, Masaru Shibata, Masa Katsu Fujimoto, Shuichi Sato, Mitsuhiro Fukushima, Shoken M. Miyama, Gen'ichi Horikoshi, Takayuki Tomaru, M. Ohashi, Nobuki Kawashima, Kentaro Somiya, Kenji Numata, Kazuhiro Hayama, Shigenori Moriwaki, Ken-ichi Ueda, Nobuyuki Kanda, Toshifumi Futamase, Atsushi Sekiya, Shinji Miyoki, Misao Sasaki, Koji Arai, M. A. Barton, Shinsuke Taniguchi, Gerhard Heinzel
Publikováno v:
Physical Review Letters. 86:3950-3954
TAMA300, an interferometric gravitational-wave detector with 300-m baseline length, has been developed and operated with sufficient sensitivity to detect gravitational-wave events within our galaxy and sufficient stability for observations; the inter
Publikováno v:
Physics Letters A. 280:289-296
The thermal fluctuation of a mechanical system with an inhomogeneously distributed loss was measured to prove the invalidity of the normal-mode expansion method which is commonly used to calculate the thermal noise of mechanical oscillators. The meas
Publikováno v:
Physics Letters A. 266:228-233
We present a new method for estimating the thermal noise at off-resonant frequencies in a mechanical system. In this method, the mechanical conductance is directly measured at anti-resonant frequencies, and then the fluctuation-dissipation theorem is