Reports until 12:00, Wednesday 17 December 2014
H1 TCS
eleanor.king@LIGO.ORG - posted 12:00, Wednesday 17 December 2014 - last comment - 15:56, Wednesday 17 December 2014(15678)
ITMx and ITMy HWS aligned

Thomas V, Elli

The ITMy and ITMx Hartmann wavefront sensors are now aligned to their respective SLEDS.

We took the HWS plates out and centered the SLED beam on the camera using the periscope mirrors and the final mirror before the HWS (pictures of the final alignment on the camera are included).

The ITMx image is a lot dimmer than the ITMy image, however the H1:TCS-ITMX_HWS_SLEDPOWERMON  said 5mW whereas H1:TCS-ITMY_HWS_SLEDPOWERMON says 1.8 mW.  We were watching to maximise image brightness as we made the adjustments so I don't know why ITMx image is so much dimmer.

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thomas.vo@LIGO.ORG - 15:56, Wednesday 17 December 2014 (15691)

We also observed some tarnishing or something on one of the HWS plates, picture attached.  Some light wiping with an ipa wipe did not get it off, so we swapped the plate with a spare.

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