National Astronomical Observatory of Japan

Interferometric gravitational wave antenna


What is the interferometric gravitational wave antenna TAMA300?

We constructed the interferometric gravitational wave antenna TAMA300, with a 300 m baseline length, in NAOJ Mitaka Campus starting from 1995. Since then, we have improved the sensitivity of the detector and developed new observation techniques. Our goal was to detect gravitational waves emitted from astronomical phenomena where massive objects violently move and transform. Gravitational wave astronomy aims to investigate the nature of various phenomena that cannot be observed with other methods. TAMA300 was completed before gravitational wave detectors in Europe and America. It produced many results such as achieving the world's highest sensitivity at that time and succeeded in long-term observational operations using a large interferometer. We are now working to develop technologies for the Large-scale Cryogenic Gravitational Wave Telescope KAGRA which is under construction in Hida, Gifu Prefecture, Japan.

Interferometric gravitational wave antenna TAMA300


LocationMitaka Campus (Osawa, Mitaka, Tokyo, JAPAN)
DetectorLaser interferometer (Michelson interferometer)
Baseline length300 m


1995TAMA300 construction started in Mitaka Campus.
September 1999TAMA300 observation operations started.