Interferometer design of the KAGRA gravitational wave detector

Interferometer design of the KAGRA gravitational wave detector

Yoichi Aso, ∗ Yuta Michimura, † Kentaro Somiya, ‡ Masaki Ando, 3 Osamu Miyakawa, Takanori Sekiguchi, Daisuke Tatsumi, and Hiroaki Yamamoto (The KAGRA Collaboration) Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, JAPAN Department of Physics, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8550, JAPAN National Astronomical Observatory o...

Triple Michelson Interferometer for a Third-Generation Gravitational Wave Detector

The upcoming European design study ‘Einstein gravitational wave Telescope’ represents the first step towards a substantial, international effort for the design of a third-generation interferometric gravitational wave detector. It is generally believed that third generation instruments cannot be installed into existing infrastructures but will require a new search for optimal detector sites. Con...

Laser Interferometer Gravitational Wave Observatory

Laser Interferometer Gravitational Wave Observatory

We report on a search for gravitational wave bursts using data from the first science run of the LIGO detectors. We focus on bursts with durations ranging from 4 msec to 100 msec, and with significant power in the LIGO sensitivity band of 150 to 3000 Hz. We bound the rate for such detected bursts at less than 1.6 events per day at 90% confidence level. This result is interpreted in terms of the...

Laser Interferometer Gravitational Wave Observatory

We propose a method for in situ measurement of the length of kilometer size Fabry-Perot cavities in laser gravitational wave detectors. The method is based on the vernier, which occurs naturally when the laser incident on the cavity has a sideband. By changing the length of the cavity over several wavelengths we obtain a set of carrier resonances alternating with sideband resonances. From the m...