Progress of the Large-Scale Cryogenic Gravitational Wave Telescope Kagra
Yuki Inoue on behalf of KAGRA1*
1Institute of Physics, Academia Sinica, Taipei, Taiwan
* Presenter:Yuki Inoue on behalf of KAGRA
LIGO’s discovery of gravitational wave marked an opening of a new era of GW astronomy. In order to explore the new physics under the extreme gravity condition and eventually challenge the Einstein’s theory of gravity in high precision, accurate calibration of the GW form is essential.
KAGRA is a 3-km Large-Scale Cryogenic Gravitational Wave Telescope, which is placed at the underground site of Kamioka mine, Japan. The stable underground site provide us the low seismic and Newtonian noise. Also, it will employ the cryogenic mirrors to reduce thermal noise. We will start the operation of KAGRA at 2018.

Recently, we are currently working in calibration system of KAGRA.
Development and improvement of photon calibrator is also a challenge in KAGRA as well as future GW detectors network.
The photon calibrator can push the mirror surface with photon pressure. Therefor, we can cross-calibrate the absolute displacement by comparing the absolute laser power of each photon calibrator. We newly start the cross-calibration study between each world wide GW detector.

In this talk, we report the progress of the KAGRA and future plans.

Keywords: Gravitational wave, KAGRA, Photon calibrator