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Reports until 08:30, Friday 21 February 2014
H1 SEI
hugh.radkins@LIGO.ORG - posted 08:30, Friday 21 February 2014 (10239)
BS HEPI & ISI Tripped

The SUS tripped out the SEIs and I'm bringing them back up.  After bringing HEPI back I checked the ISI Stage1 position/target deltas and I thought 'Self, you just reset those targets yesterday and they are already drifted too far to start the ISI with the T240 in the blend? Geez!"  So I pondered this for a minute or too and longingly looked again and thought, "Hey self, those deltas aren't as large as they were are they?"  And I replied, "Hey self, you are correct sir! These differences are getting smaller!"  And now over the time to write this alog, the ISI offsets have gotten fairly close to zero and the ISI should go up now directly on the Trilliums.  ANd now that I've tried it did.

Not enough time at the moment to look but either the HEPI is just that slow to settle although looking at the Bias screeen, they are pretty much at target when I still see the ISI offsets too large.  The HEPI could still be relaxing into position even though the Actuator/IPSs are at target or the ISI takes some time to creep into position after the HEPI moves into position.  FYI, the HEPI does move/tilt a fair bit on the BS, not sure why and again it would be good to not do this if the alignment could tolerate it.

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