aLIGO LHO Logbook

H1 AOS

filiberto.clara@LIGO.ORG - posted 13:45, Wednesday 17 January 2024 - last comment - 10:05, Monday 22 January 2024(75450)

LVEA High Voltage Power Supplies Powered Off

Procedure M1300464

The following high voltage power supplies/electronics were powered off in preparation for the corner vent.

1. CER Mezzanine - ESD HV
2. CER Mezzanine - Fast Shutter
3. CER Mezzanine - OMC PZT
4. CER - SR3 and ITM heaters
5. LVEA - Fast Shutter Driver Chassis - Disabled and powered off
6. MER Mezzanine - HAM7 PSAMS
7. MER Mezzanine - HAM7 Piezo

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Comments related to this report

camilla.compton@LIGO.ORG - 10:05, Monday 22 January 2024 (75500)SQZ

Link

In future, before turning off the HAM7 piezo HV, we should slowly ramp ZM4 and ZM5 PSAMs to 0V. Sheila has now turned this to 0V before Fil re-enables the HV- WP 11636. I will plan to add this to the M1300464 checklist.