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Message ID: 1917
Entry time: Mon Aug 17 04:16:13 2009
In reply to: 1915
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| Author: |
Yoichi |
| Type: |
Update |
| Category: |
PSL |
| Subject: |
Reference cavity reflection looks bad |
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| Quote: | Rana, Yoichi
- We also moved the Refcav reflection camera to look at the leakage through a reflection steering mirror so that there's less chance of distortion. There was previously a W1 window in there as a pickofff. Also changed the camera to autogain so that we can see something.
- Re-aligned onto the refl pd.
- Tweaked alignment into RC. Mainly in yaw. Transmission went from 5V to 7V. In your face, Aso!
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After our removal of the pick off window and Rana's re-alignment of the beam into the RC, the RC optical gain increased.
FSS was complaining about it by driving the PC feedback crazy.
I reduced the nominal common gain from 12.5dB to 11dB. |