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Ultra-stable performance of an underground-based laser interferometer observatory for gravitational waves

S. Sato·S. Miyoki·S. Telada·D. Tatsumi·A. Araya·M. Ohashi·Y. Totsuka·M. Fukushima·M. -K. Fujimoto
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Abstract

In order to detect the rare astrophysical events that generate gravitational wave (GW) radiation, sufficient stability is required for GW antennas to allow long-term observation. In practice, seismic excitation is one of the most common disturbances effecting stable operation of suspended-mirror laser interferometers. A straightforward means to allow more stable operation is therefore to locate the antenna, the ``observatory'', at a ``quiet'' site. A laser interferometer gravitational wave antenna with a baseline length of 20m (LISM) was developed at a site 1000m underground, near Kamioka, Japan. This project was a unique demonstration of a prototype laser interferometer for gravitational wave observation located underground. The extremely stable environment is the prime motivation for going underground. In this paper, the demonstrated ultra-stable operation of the interferometer and a well-maintained antenna sensitivity are reported.

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S. Sato, S. Miyoki, S. Telada, D. Tatsumi, A. Araya, M. Ohashi, Y. Totsuka, M. Fukushima, M. -K. Fujimoto. 2004-03-18. Ultra-stable performance of an underground-based laser interferometer observatory for gravitational waves. https://doi.org/10.1103/physrevd.69.102005

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