Koichi Waseda

LARGE-SCALE CRYOGENIC GRAVITATIONAL WAVE TELESCOPE

We present here the Large-scale Cryogenic Gravitational wave Telescope (LCGT) project which is aimed to improve the sensitivity of the existing gravitational wave projects by ten times. LCGT is the project constructing the km-scale gravitational wave detector in Japan succeeding the TAMA project, which adopts cryogenic mirrors with a higher power laser. We are planing to build it in an underground site in Kamioka mine. If its target sensitivity is attained, we will be able to catch a few events per month.

Measurement of the mechanical loss of a cooled reflective coating for gravitational wave detection

We have measured the mechanical loss of a dielectric multilayer reflective coating (ion-beam sputtered

Mechanical loss of the reflective coating and fluorite at low temperature

{\mathrm{SiO}}_{2}

High-gain power recycling of a Fabry-Perot Michelson interferometer for a gravitational-wave antenna

and

Manufacture of a 10-km-scale radius-of-curvature surface by use of a thin-film coating technique

{\mathrm{Ta}}_{2}{\mathrm{O}}_{5}

Measurement of the mechanical loss of a dielectric multilayer reflective coating at low temperature

) in cooled mirrors. The loss was nearly independent of the temperature (