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Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aipc..456..217s&link_type=abstract
The second international laser interferometer space antenna symposium (LISA) on the detection and observation of gravitational w
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5
Gravitational Wave Detectors And Experiments, Gravitational Radiation Detectors, Mass Spectrometers, And Other Instrumentation And Techniques
Scientific paper
The last few years have brought a great break-through in the quest for earth-bound detection of gravitational waves: on five sites the world over, detectors of armlengths from 0.3 to 4 km are being built. These projects have in common that one prominent noise source, the shot noise, is reduced by the use of power recycling. The British-German project GEO 600, although only intermediate in size (600 m), has good chances for a competitive sensitivity by using advanced optical technologies early on. Particularly the use of special narrow-banding schemes, the so-called signal recycling, will allow to search for faint sources of only slowly varying frequency (pulsars, close binaries). We will describe the particular GEO 600 interferometer topology, characterized by the use of a four-pass delay line and power as well as signal recycling. The current status of the construction of GEO 600 will be outlined (civil engineering, vacuum, optics). Also, recent results from the Garching 30-m prototype interferometer, used as a testbed for GEO 600, will be reported. First operation of GEO 600, and also of other ground-based interferometers, is expected around the year 2000.
Geo 600 Team
Schilling Roland
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