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

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

3. 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

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

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

6. 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

7. 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

8. 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

9. 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