Noise behavior of the Garching 30-meter prototype gravitational-wave detector

Details Noise behavior of the Garching 30-meter prototype gravitational-wave detector Noise behavior of the Garching 30-meter prototype gravitational-wave detector

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvd..38..423s&link_type=abstract

Physical Review D (Particles and Fields), Volume 38, Issue 2, 15 July 1988, pp.423-432

Astronomy and Astrophysics

Astrophysics

86

Observational Cosmology

Scientific paper

The prototype gravitational-wave detector at Garching is described: in a laser-illuminated Michelson interferometer having arms 30 m in length, a folded optical path of 3 km is realized. The origin, action, and magnitude of possible noise sources are given. The agreement between the expected and measured noise is good. For a band of astrophysical interest, extending from 1 to 6 kHz, the quantum shot noise corresponding to a light power of P=0.23 W is dominant. In terms of the dimensionless strain h the best sensitivity in a 1-kHz bandwidth is h=3×10-18, comparable to the most sensitive Weber-bar-type antennas.

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