Large Scale Cryogenic Gravitational Wave Telescope

Large scale Cryogenic Gravitational wave Telescope (LCGT) is proposed to detect directly gravitational waves from neutron binary star coalescences at 240 Mpc away from our galaxy with signal to noise ration of 10. The designed strain sensitivity is 3×10 −24 1/ √ Hz at 100Hz. To realize this sensitivity, LCGT is to be set in a stable and low seismic noise environment such as the Kamioka mine, to have sapphire cryogenic mirrors and suspension fibers, and to utilize broad band RSE technique combining with power recycling technique. Two identical telescopes are set in the same site to enhance the signal confidence. We will introduce the refined LCGT design