Reports until 16:32, Tuesday 11 January 2022
H1 ISC
marc.pirello@LIGO.ORG - posted 16:32, Tuesday 11 January 2022 - last comment - 15:59, Wednesday 12 January 2022(61271)
Baffle PD gain decreased

I pulled the two baffle PD's at the corner and reduced the gain per WP10149 and E1900033.  Gain was reduced by a factor of 10 and chasiss were tested and reinstalled in the biergarten.

Chassis modified - S1400066, S1400065 (H1-SUS-R5-ITMX)  

Remaining chasiss to be modified S1400075 (H1-SUS-R1-EX), S1400064 (H1-SUS-R1-EY)

Comments related to this report
marc.pirello@LIGO.ORG - 15:59, Wednesday 12 January 2022 (61281)
Link

I pulled the remaining two Baffle PD Amplifiers from end-x and end-y, applied the gain reduction modification and reinstalled the chassis.  Both chassis were tested before reinstallation.

Chassis Modified - S1400075 (end X), S1400064 (end Y)