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| 40m Log |
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 Tue Feb 4 16:43:50 2014, manasa, Update, General, IFO alignment update
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 Tue Feb 4 17:40:19 2014, manasa, Update, General, Ready for pump down??
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Tue Feb 4 23:01:24 2014, Jenne, Update, General, Ready for pump down??
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Wed Feb 5 15:26:57 2014, manasa, Update, General, Ready for pump down??
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Mon Feb 10 16:02:12 2014, Jenne, Update, General, PRM oplev clipped in vacuum 
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Mon Feb 10 16:20:28 2014, Jenne, Update, General, PRM QPD recentered
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Mon Feb 10 18:59:25 2014, Jenne, Update, ASC, PRM ASC better, but not great yet
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Mon Feb 10 19:56:10 2014, rana, Update, ASC, PRM ASC better, but not great yet
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Message ID: 9597
Entry time: Tue Feb 4 17:40:19 2014
In reply to: 9596
Reply to this: 9598
9616
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| Author: |
manasa |
| Type: |
Update |
| Category: |
General |
| Subject: |
Ready for pump down?? |
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| Quote: |
* PRM suspension has not been behaving well. PRM is being kicked around every 5-10 seconds when the PRC is aligned (as seen on REFL camera). We are not sure where this is coming from. The first time we saw this happening was when we were trying to lock PRC at low power even before we took the heavy doors off. So we are pretty sure this is not caused by the foil cover on the OSEMs. We tried turning ON/OFF the oplev servo, turning ON/OFF the damping loops and also checked the connections in the feedthrough and satellite box for the PRM. The OSEM sensor values for the suspension also seem to match the ones on the wiki.
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This is solved.
The ASC for PRC for left turned ON. Turning it OFF solved the problem.
If there is no feedback regarding the POP alignment or anything to check with modified PRC length, we will close tomorrow morning. |