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Tue Sep 18 20:32:42 2012, Manasa, Configuration, PSL, AOM installation
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Wed Sep 19 11:39:37 2012, Manasa, Configuration, PSL, AOM installation
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Wed Sep 19 15:41:27 2012, Manasa, Configuration, PSL, AOM installation
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Wed Sep 19 23:17:25 2012, rana, Configuration, PSL, AOM installation
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Thu Sep 20 01:29:04 2012, Manasa, Configuration, PSL, AOM installation
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Fri Sep 21 12:12:56 2012, Manasa, Configuration, PSL, AOM installation
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Tue Oct 2 16:15:22 2012, Manasa, Configuration, PSL, AOM installation
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Wed Oct 3 16:52:16 2012, Manasa, Configuration, PSL, AOM installation
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Wed Oct 3 23:36:54 2012, Koji, Configuration, PSL, AOM installation
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Thu Oct 4 17:54:59 2012, Manasa, Configuration, PSL, AOM installation
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Thu Oct 4 18:48:04 2012, janosch, Configuration, PSL, AOM installation
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Thu Oct 4 20:57:43 2012, Manasa, Configuration, PSL, AOM installation
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Thu Oct 4 22:16:28 2012, Koji, Configuration, PSL, AOM installation
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Fri Oct 5 18:08:17 2012, Manasa, Configuration, PSL, AOM installation
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Message ID: 7494
Entry time: Fri Oct 5 18:08:17 2012
In reply to: 7482
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Author: |
Manasa |
Type: |
Configuration |
Category: |
PSL |
Subject: |
AOM installation |
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Quote: |
Do more investigation to understand what is causing the power reduction.
Is the alignment inadequate? Check the in-lock ccd image.
Is the incident power reduced? (by what?) Use dataviewer.
Is the AOM doing something? Is it active? Then how much power is it eating?
BY THE WAY, how the deflected beam is dumped?
If you don't have anything for blocking the 1st order beam, you have to expect Steve coming to you.
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The PMC has been aligned and is all happy happy 
I have installed an iris to dump the higher order beams deflected by the AOM. After installing the iris, I found that the PMC trans dropped to 0.58V and the PMC misaligned in pitch. So I've touched the 2 steering mirrors before the PMC. Now it is satisfactorily locked with PMC trans at 0.84.
I have also checked the alignment with AOM switched on. PMC trans drops to 0.15 with AOM on and comes back to 0.84 when AOM is switched off without losing lock . |