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| 40m Log |
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 Tue Mar 23 00:31:51 2010, Koji, Update, IOO, MC realigned 
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 Tue Mar 23 09:37:36 2010, steve, Update, IOO, vac envelope has to be sealed as antproof for overnight
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Tue Mar 23 09:55:20 2010, Koji, Update, IOO, vac envelope has to be sealed as antproof for overnight
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Wed Mar 24 02:06:24 2010, Koji, Update, IOO, vac envelope has to be sealed as antproof for overnight
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Message ID: 2699
Entry time: Tue Mar 23 09:37:36 2010
In reply to: 2698
Reply to this: 2700
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| Author: |
steve |
| Type: |
Update |
| Category: |
IOO |
| Subject: |
vac envelope has to be sealed as antproof for overnight |
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| Quote: |
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This is the first touch to the MC mirrors after the earthquake on 16th.
- I made an aluminum access connector so that we can work on the MC even the door is open. We still can be able to open the aluminum tube. The photos are attached. Steve, could you please look it at a glance whether the seal is enough or not.
- MC resonances were flashing. Align MC2 and MC3 so that we have many TEM00s.
- Found c1vmesus2 gone mad. Restarted remotely according to the wiki entry.
- Reset the MC coil output matrix to 1. (Previously, balance was adjusted so that A2L was minimized.)
- Excite MC2 Pitch/Yaw at 8 and 9 Hz, looking at the peaks in the MC-MCL output. Move MC2 Pitch/Yaw so that the peak
is reduced. (*)
- MC1/MC3 were aligned so that we get the maximum transmission (or minimum reflection). (**)
- Repeat (*) and (**)
So far, I have aligned in Yaw such that the yaw peak is minimized.
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This seal is good for daily use- operation only. The IFO has to be sealed with light metal doors every night so ants and other bugs can not find their way in.
Our janitor Kevin is mopping the hole IFO room floor area with 5% ant killing solution in water in order to discourage bugs getting close to our openings of the vented chamber.
You may be sensitive to this chemical too. Do not open chamber till after lunch. |
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