Speaker
Mr
Koki Okutomi
(Sokendai (GUAS))
Description
KAGRA is a Japanese interferometric gravitational-wave telescope with an arm length of 3 km. Main features of KAGRA are 1) placing underground and 2) cooling down mirrors to cryogenic temperature. The test operation with room temperature is over in April 2016.
We achieve vibration isolation of mirrors with long multistage suspension systems called seismic attenuation systems (SAS.) Each stage has functions to lower its resonant frequency. Because the whole of suspension system has to be operated with the interferometer, its control system becomes very complicated. I report an overview of KAGRA's vibration isolation systems and results of suspension performance in the first operation.
Primary authors
Dr
Ayala Shoda
(NAOJ)
Mr
Koki Okutomi
(Sokendai (GUAS))
Dr
Ryutaro Takahashi
(NAOJ)
Mr
Yoshinori Fujii
(Dept. of Astronomy, Univ. of Tokyo)
Co-authors
Mr
Bungo Ikenoue
(NAOJ)
Dr
DeSalvo Reccard
(Univ. Sannio)
Dr
Ettore Majorana
(INFN Rome)
Dr
Fabián Erasmo Peña Arellano
(NAOJ)
Mr
Fumihiro Uraguchi
(NAOJ)
Mr
Hideharu Ishizaki
(NAOJ)
Dr
Joris van Heijningen
(NIKHEF)
Dr
Kazuhiro Agatsuma
(NIKHEF)
Dr
Kazuhiro Yamamoto
(ICRR, Univ. of Tokyo)
Dr
Mark Barton
(NAOJ)
Dr
Masahiro Kamiizumi
(ICRR, Univ. of Tokyo)
Mr
Mitsuhiro Fukushima
(NAOJ)
Mr
Naoatsu Hirata
(NAOJ)
Dr
Naoko Ohishi
(NAOJ)
Dr
Osamu Miyakawa
(ICRR, Univ. of Tokyo)
Prof.
Raffaele Flaminio
(NAOJ)
Mr
Sakae Saitou
(NAOJ)
Dr
Takanori Sekiguchi
(ICRR, Univ. of Tokyo)
Dr
Takashi Uchiyama
(ICRR, Univ. of Tokyo)
Dr
Tomotada Akutsu
(NAOJ)
Dr
Yoichi Aso
(NAOJ)
Mr
Yoshiyuki Obuchi
(NAOJ)
