Reports until 17:05, Saturday 09 July 2016
H1 General
nutsinee.kijbunchoo@LIGO.ORG - posted 17:05, Saturday 09 July 2016 - last comment - 20:17, Saturday 09 July 2016(28306)
Lockloss 23:42 UTC

ITMX bounce mode was ringing up so I flipped the sign of the gain. Unfortunately I accidentally flipped the wrong gain (instead of ITMX Bounce I flipped ITMX Roll). Likely caused ITMY Roll to ring up and blew the lock.

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nutsinee.kijbunchoo@LIGO.ORG - 19:00, Saturday 09 July 2016 (28308)

Lockloss again due to ETMY PI 15009 Hz rung up.

This time I tried to catch the mode early before power up. I was able to damp it just fine using -60deg -10 gain. However, the mode jumped when the IFO entered COIL_DRIVER (at about -22 mins) and never ring down. I thought I was able to damp it with opposite gain (-12 min) but it rung up shortly after.

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nutsinee.kijbunchoo@LIGO.ORG - 20:17, Saturday 09 July 2016 (28309)DetChar

3:07 UTC Lockloss at COIL_DRIVER

PR gain and SRC seems unstable.  I called Jenne and this seems to be a problem of SRM not following the rest of the SRC (that I didn't know I should be moving). Guardian didn't seems to know that it has lost lock and wouldn't move to DOWN. This happened twice now. I had to requst DOWN manually.  This is already a known problem. Nevermind.

 

There was another lockloss at INCREASE_POWER (02:14 UTC) that I didn't alog. Now that I lost lock around the same place it's becoming a pattern so I thought I would mentioned.

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