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We started improvements of the detector and developments of observation technique
in 1995 using the 300m interferometer gravitational antenna TAMA300
in Mitaka campus of the national astronomical observatory of Japan.
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The aim of the project is to develop advanced techniques needed for a future km-sized interferometer and catch gravitational waves that may occur within our local group of galaxies.
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The present sensitivity of TAMA300 is h = 10-21 [1/Hz1/2] at 1kHz. It is possible to detect gravitational waves from coalescing neutron-star binaries in our galaxy. However it is considered that the event rate is once a few 100,000 year within a galaxy. In order to catch gravitaional waves several times a year, KAGRA(LCGT) with the sensitivity one hundred times better than the present one is necessary.
=>KAGRA |
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TAMA adopts a Fabry-Perot Michelson Interferometer with recycling. We started installaion of a next genaration technique RSE.
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