Torsion-Bar Antenna for Low-Frequency Gravitational-Wave Observations

Details Torsion-Bar Antenna for Low-Frequency Gravitational-Wave Observations Torsion-Bar Antenna for Low-Frequency Gravitational-Wave Observations

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010phrvl.105p1101a&link_type=abstract

Physical Review Letters, vol. 105, Issue 16, id. 161101

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3

Gravitational Wave Detectors And Experiments, Interferometers, Gravitational Radiation Detectors, Mass Spectrometers, And Other Instrumentation And Techniques

Scientific paper

We propose a novel type of gravitational-wave antenna, formed by two bar-shaped test masses and laser-interferometric sensors to monitor their differential angular fluctuations. This antenna has a fundamental sensitivity to low-frequency signals below 1 Hz, even with a ground-based configuration. In addition, it is possible to expand the observation band to a lower limit determined by the observation time, by using modulation and up-conversion of gravitational-wave signals by rotation of the antenna. The potential sensitivity of this antenna is superior to those of current detectors in a 1 mHz-10 Hz frequency band and is sufficient for observations of gravitational waves radiated from in-spiral and merger events of intermediate-mass black holes.

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