A few months ago, we reported on a theoretical paper that discussed the potential advantages of a gravity wave detector based on a torsion bar, which the creators called TOBA. In the intervening time, the team has not been idle, as they have a small-scale test bar up and running. Deep in the night of August 15, 2009, they performed a test run to look for gravity waves—not gravity induced pressure fluctuations in Earth's atmospheric pressure, but stretching space-time.
The good thing about the TOBA experiment is that it fills an important spectral gap in the current generation of gravity wave detectors. Cosmological and astronomical observations can be used to look for extremely low frequency (10-6Hz) gravitational waves, while the laser interferometer detector (LIGO), and other Earth-bound instruments are used to look for gravity waves with frequencies in the 100Hz plus range. TOBA is designed to operate in the 0.1-1Hz range.
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Source: http://feeds.arstechnica.com/~r/arstechnica/index/~3/dT9FtPc8QDk/toba-is-a-swingin.ars
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