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VIS (EY)
ryutaro.takahashi - 18:14 Tuesday 09 January 2024 (28212) Print this report
Recovery of Type-A

I performed the recovery of the Type-A system in EY.

  1. Reset the WD and DK for the pre-isolator, the GAS filters, and the cryo-payload.
  2. Guardian went to the ISOLATED state soon.
  3. I offloaded F1 GAS and IP_L&T.
  4. Guardian tried to go to the LOCK_ACCUISITION state, but MN_DAMP failed soon, and the state went back to the ISOLATED.
Comments to this report:
takafumi.ushiba - 19:31 Tuesday 09 January 2024 (28216) Print this report

ETMY TM OpLev beams were not hit on the QPDs, when ETMY was ISOLATED state.
So, we need to manually tweek the ETMY alignment to roughly align the OpLev beams to QPDs before requesting LOCK_ACQUISITION state to ETMY guardian.

kenta.tanaka - 9:17 Thursday 11 January 2024 (28246) Print this report

I tweaked the ETMY alignment with MN OPTICALIGN and succeeded in centering the TM oplev. However because the beam is not centered in MN TILT oplev in this state, MNOLDAMP is not working well as like IX. So we need to perform the centering for MN oplev.

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