aLIGO LHO Logbook

H1 TCS

jeffrey.kissel@LIGO.ORG - posted 11:29, Wednesday 24 May 2017 - last comment - 14:04, Wednesday 24 May 2017(36374)

ITM TCS Ring Heater Drivers Turned Back On, Restored to Nominal Heating

J. Kissel, K. Izumi, (A. Brooks by phone)

We had restored the ITM ring heater settings, but failed to see any measured current. After calling Aidan, he told us to check the drivers in the CER. We found they were OFF. We've turned the drivers back ON and restored the settings. ITMs are now being toasted as normal.

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kyle.ryan@LIGO.ORG - 11:57, Wednesday 24 May 2017 (36376)

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This may have happened close in time to when I was taking RGA scans.  Is there any time stamp data that would confirm when these were actually energized?

jeffrey.kissel@LIGO.ORG - 12:12, Wednesday 24 May 2017 (36379)

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I can't give you super precision, but Kiwamu and I flipped on the switches, then immediately walked to the control room and turned on the requested power. The requested power came on at 18:20 UTC, or 11:20 PDT (May 24th 2017), so maybe energizing happened 5 minutes prior.

kyle.ryan@LIGO.ORG - 14:04, Wednesday 24 May 2017 (36384)

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Thanks Jeff, this is well after my data collecting.