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 Thu Jun 12 01:51:23 2008, rob, Update, Locking, report 
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 Thu Jun 12 15:09:33 2008, alan, Update, Locking, report
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Thu Jun 12 15:55:15 2008, rob, Update, Locking, report
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Message ID: 531
Entry time: Thu Jun 12 01:51:23 2008
Reply to this: 532
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| Author: |
rob |
| Type: |
Update |
| Category: |
Locking |
| Subject: |
report |
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rob, john
We've been working (nights) on getting the IFO locked this week. There's been fairly steady incremental progress each night, and tonight we managed to control CARM(MCL) using PO-DC, with the CARM(AO) path also on PO-DC. In the past, reaching this state has usually meant we're home free, as we could just crank the gain on the common mode servo and merrily reduce the CARM offset. Tonight, however, this state has been very twitchy, and efforts to ramp up the gain have been unsuccessful.
I've attached a diagram which I hope makes clear where we are in the stages of lock acquisition. |
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