aLIGO LHO Logbook

H1 TCS

thomas.vo@LIGO.ORG - posted 17:32, Tuesday 20 May 2014 - last comment - 09:31, Wednesday 21 May 2014(11998)

CO2P X-laser update

Thomas, Greg, David

HWS 
- X-end of table continued to be aligned.

TCSX -
- managed to get the FLIR camera to be connected up to a laptop. Will look to mount on-table tomorrow.
- measurements made to calibrate the on-table output power meter.  Maximum power of 2.36W for a rotation angle of 82.5degrees. 
- maximum measured power after the two polarizers was 40.85W.
- maximum measured power after the mask was 10.1W 
--> this would indicate that a maximum power of ~5W could be incident on the CP. Will investigate further.
TCSX laser will be left operating overnight.

Comments related to this report

aidan.brooks@LIGO.ORG - 09:31, Wednesday 21 May 2014 (12008)

Link

The low transmission through the central mask is because 
 - that mask was designed for use in the central heating path 
 - the beam size in the annular heating beam path is ~2.5x larger than in the central heating path.