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40m Log |
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Tue Feb 21 16:10:29 2012, kiwamu, Update, IOO, degradation in input PZT1
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Mon Mar 5 03:50:49 2012, kiwamu, Update, IOO, PZT1 PITCH railing
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Mon Mar 5 17:07:58 2012, kiwamu, Update, IOO, realigned MC
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Thu Mar 8 23:37:03 2012, kiwamu, Update, IOO, dither Y arm dither script
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Wed Mar 14 04:03:37 2012, kiwamu, Update, IOO, PZT1 and associate extra works
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Message ID: 6410
Entry time: Wed Mar 14 04:03:37 2012
In reply to: 6357
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Author: |
kiwamu |
Type: |
Update |
Category: |
IOO |
Subject: |
PZT1 and associate extra works |
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As the PZT1 has not been functional, I have been aligning the Y arm to the input beam instead of aligning the beam to the Y arm.
It turned out that this procedure leads to two extra works everytime after alignments of the Y arm:
- The Y green beam must be always aligned to the Y arm
- The amount of the misalignment was found to be relatively big compared with how it used to be.
- The PSL beat note setup must be always realigned because the Y green path is determined by the orientation of the Y arm.
- In the past I didn't often realign the beat note path, but currently it needs to be pay more attentions.
Sad ..
Quote from #6357 |
The polarity for controlling the PZT1 PITCH seems to have flipped for some reason.
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