georgia.mansell@LIGO.ORG - posted 21:59, Wednesday 03 October 2018 - last comment - 15:27, Thursday 04 October 2018(44329)
ITMX Hartmann iris closed over again
TVo and I closed the iris to cover the problematic back reflection on HWS ITMX this evening. Screenshot with the Hartmann plate off attached.
We looked on the ccd for some dust that would cause the circular fringes in the image but it looked clean.
We restarted the Hartmann code for ITMX at 1222663398. At this time the ifo was locked at 2W and there was 500 mW of CO2X on.
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Opened up the iris and restarted the ITMX HWS code, the IFO status was unlocked at 2 watts and 0.5 Watts of CO2 pre-heating