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Improvement of the vibration isolation system for TAMA300

Ryutaro Takahashi, Koji Arai and the TAMA collaboration

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The vibration isolation system for TAMA300 has a vibration isolation ratio large enough to achieve the requirement in the observation band around 300 Hz. At a lower frequency range, it is necessary to reduce the large fluctuation of mirrors for stable operation of the interferometer. With this aim, the mirror suspension systems were modified and an active vibration isolation system using pneumatic actuators was installed. These improvements contributed to the realization of a continuous interferometer lock for more than 24 h.


PACS

04.80.Nn Gravitational wave detectors and experiments

07.07.Tw Servo and control equipment; robots

07.60.Ly Interferometers

07.10.Fq Vibration isolation

MSC

83C35 Gravitational waves

Subjects

Instrumentation and measurement

Gravitation and cosmology

Dates

Issue 7 (7 April 2002)

Received 29 October 2001, in final form 22 November 2001

Published 14 March 2002



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