R Takahashi et al 2008 Class. Quantum Grav. 25 114036 doi:10.1088/0264-9381/25/11/114036
R Takahashi1, K Arai1, D Tatsumi1, M Fukushima1, T Yamazaki1, M-K Fujimoto1, K Agatsuma2, Y Arase3, N Nakagawa2, A Takamori4, K Tsubono5, R DeSalvo6, A Bertolini7, S Márka8 and V Sannibale6 (the TAMA Collaboration)
Show affiliationsTAMA300 has been upgraded to improve the sensitivity at low frequencies after the last observation run in 2004. To avoid the noise caused by seismic activities, we installed a new seismic isolation system—the TAMA seismic attenuation system (SAS). Four SAS towers for the test-mass mirrors were sequentially installed from 2005 to 2006. The recycled Fabry–Perot Michelson interferometer was successfully locked with the SAS. We confirmed the reduction of both length and angular fluctuations at frequencies higher than 1 Hz owing to the SAS.
78A60 Lasers, masers, optical bistability, nonlinear optics (See also 81V80)
Instrumentation and measurement
Issue 11 (7 June 2008)
Received 5 November 2007, in final form 25 December 2007
Published 15 May 2008
R Takahashi et al 2008 Class. Quantum Grav. 25 114036
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