CLIO underground in mine

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Presentation transcript:

CLIO underground in mine 40min drive From Toyama Air port Kamioka Tokyo Google Earth 220km L-V meeting at Arcadia, CA 3/17/2009

L-V meeting at Arcadia, CA 3/17/2009 CLIO in Kamioka mine L-V meeting at Arcadia, CA 3/17/2009

CLIO as a key prototype for LCGT Osamu Miyakawa, ICRR Univ. Tokyo, Japan and CLIO team 100 meter scale, cryogenic interferometer Under ground in Kamioka mine, very quiet seismic environment Locked-FP type (Caltech old 40meter Mark II style) 2W laser, 10m MC, Suspensions designed for cooling Prototype for LCGT, km scale project in Japan Reached to suspension/mirror thermal noise in room temperature Ready to cool down soon! L-V meeting at Arcadia, CA 3/17/2009

Remarkable seismic environment in Kamioka mine L-V meeting at Arcadia, CA 3/17/2009

L-V meeting at Arcadia, CA 3/17/2009 CLIO in Kamioka mine L-V meeting at Arcadia, CA 3/17/2009

CLIO target sensitivity Laser power : 250mW for one arm Mirror Mass : 1.8 kg Thermal Noises limit the sensitivity around 100Hz, and they will be reduced after cooling. Occupation factor to be SQL will be ~3 after cooling, or less with higher power. L-V meeting at Arcadia, CA 3/17/2009

CLIO reached to thermal noise in the room temperature Problem: Eddy current in aluminum coil holders induced by magnets attached on mirror added mechanical loss on pendulum thermal noise Pendulum thermal Mirror thermal Solution: Aluminum holders were exchanged to ceramic and daifron holders. L-V meeting at Arcadia, CA 3/17/2009

Displacement noise compared with other projects CLIO is comparable to other projects in displacement, of course different a lot in strain. We may say that we are qualified to have a km scale interferometer in Japan. L-V meeting at Arcadia, CA 3/17/2009

L-V meeting at Arcadia, CA 3/17/2009 Noise budget We start cooling this year to observe improved thermal noise! L-V meeting at Arcadia, CA 3/17/2009