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Thu Apr 11 02:00:21 2013, Jenne, Update, Locking, TRY gone???
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Sun Apr 14 15:03:17 2013, Manasa, Update, Locking, Fixing - progress
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Sun Apr 14 17:30:14 2013, Manasa, Update, Locking, Fixed
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Sun Apr 14 23:20:42 2013, Den, Update, Locking, Fixed
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Thu Apr 18 21:12:56 2013, Manasa, Update, Locking, Fixed
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Message ID: 8455
Entry time: Sun Apr 14 23:20:42 2013
In reply to: 8453
Reply to this: 8463
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Author: |
Den |
Type: |
Update |
Category: |
Locking |
Subject: |
Fixed |
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Quote: |
TRY path fixed and ready for normalization.
I used 2" BS at R=50 and R=98 to reflect the Y arm transmission at QPD-Y and TRY PD respectively. The residual beam transmitted by the BS is now steered by a Y1mirror to the camera. With Y arm locked, transmission currently measures 40mW against the expected 70mW. TRY shows 0.45 counts in dataviewer.
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I think it is too much. Incident power to IFO is 1.3 W. Even if we assume no losses and pick-offs on the path to the arms, we should get ~100 uW out of the cavity. I measured X and Y arms transmission to be 60 uW. Did you disable triggering during your measurement? |