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Reports until 07:51, Thursday 24 September 2015
H1 General
corey.gray@LIGO.ORG - posted 07:51, Thursday 24 September 2015 (21882)
H1 Lockloss @ 12:35: Unknown Cause

12:35 H1 Lockloss (nothing obvious:  seismic quiet, and all the H1 strip tools showed nothing obvious before lockloss)

During Lock Acquisition, during 2nd locking attempt, had issues with ALS XARM:

1) You can either misalign SRM using the SUS_SRM guardian, or use a new state in ALIGN_IFO called SET_SUS_FOR_PRMI_W_ALS. 

2) Request OFFLOAD_PRMI from the DRMI guardian.

3) Once PRMI locks adjust PRM and BS alignment until you get about 80 counts on POP90 and 50 counts on POP18.  

4)Realign SRM by undoing whatever change you made in step 1.

5) Request DRMI_1F_OFFFLOADED from the ISC_DRMI guardian.

Waited for DRMI to lock again.  Several times I had a Verbal Alarm which sounded like "Slip Mode"?  What do we do about this?  It looked ugly on AS-AIR video.  Had "Slip Mode" alarms a few times while waiting for DRMI, and then the Vancouver earthquake arrived!

After recovering ISIs and ETMy, took ISC_LOCK to LOCKING_ALS, but haven't made it there yet (the guardian log keeps saying "Waiting for arms to settle").  The 0.03-0.1Hz seismic band was ramping down, but flattened out at 0.3um/s (which is over an order of magnitude from normal quiet levels).  Perhaps we should wait for this to come down to normal levels.

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