Reports until 19:15, Wednesday 25 July 2018
H1 TCS (TCS)
georgia.mansell@LIGO.ORG - posted 19:15, Wednesday 25 July 2018 - last comment - 20:08, Wednesday 25 July 2018(43077)
HWS table alignment tweaked, CO2X laser blocked on-table

Danny, TJ, Georgia

This afternoon while the arms were locked in green and team ALS were checking the DIFF PLL, we checked and tweaked up the alignment of the ITMX and ITMY Hartmann wavefront sensors.

With the new alignment as of this afternoon (see attached screenshot of sliders during this work) green beams from ITMX and ITMY made it out to the Hartmann table. We tweaked both the ITM HWS table periscope mirrors to get the beams onto their respective sensors.

We also tweaked up the alignment of the SLED for ITMY, which was misaligned on the first periscope for some reason. We should possibly check that everything on the SLED path is appropriately bolted down?

To get the HWS cameras to stream TJ had to run a thinning script as the computer was full. We streamed images from the Hartmann cameras, and steered around the periscope mirrors to see the SR3 baffle and Hartmann baffle on the ITMX sensor, and SR3 baffle on the ITMY sensor. Danny will comment with screenshots of the stream.

Meanwhile, Danny has blocked CO2X on table for the time being.

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daniel.vander-hyde@LIGO.ORG - 20:08, Wednesday 25 July 2018 (43078)AWC

HWSX and HWSY camera images with their respective beams. There is a visible back-reflection in the HWSX image (bottom left) as well as baffle clipping in both.

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