Prospects for improving the sensitivity of KAGRA gravitational wave detector

Understand

KAGRA is a new gravitational wave detector which aims to begin joint observation with Advanced LIGO and Advanced Virgo from late 2019.

• Here, we present KAGRA's possible upgrade plans to improve the sensitivity in the decade ahead.
• Unlike other state-of-the-art detectors, KAGRA requires different investigations for the upgrade since it is the only detector which employs cryogenic cooling of the test mass mirrors.
• In this paper, investigations on the upgrade plans which can be realized by changing the input laser power, increasing the mirror mass, and injecting frequency dependent squeezed vacuum are presented.