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| 40m Log |
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 Tue Apr 19 18:10:10 2022, Paco, Update, BHD, Part V of BHR upgrade - POX11 path, LO path, and ITMX Oplev 
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 Wed Apr 20 08:20:22 2022, Paco, Update, BHD, Part V of BHR upgrade - PR2 weirdness
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Wed Apr 20 18:50:03 2022, Koji, Update, BHD, Part V of BHR upgrade - PR2 weirdness
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Thu Apr 21 16:49:01 2022, Paco, Update, BHD, Part V of BHR upgrade - BS Oplev + LO1 offset
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Thu Apr 21 18:42:47 2022, Tega, Update, BHD, Part V of BHR upgrade - Align LO and AS beams to BHD BS
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Thu Apr 21 20:33:31 2022, Koji, Update, BHD, AS1 UR OSEM problem localized in the chamber
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Fri Apr 22 12:03:09 2022, Tega, Update, BHD, AS1 UR OSEM problem localized in the chamber
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Fri Apr 22 12:15:08 2022, Anchal, Update, BHD, Cable post installation
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Mon Apr 25 16:57:57 2022, Anchal, Update, BHD, Cable post installation
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Message ID: 16797
Entry time: Thu Apr 21 16:49:01 2022
In reply to: 16788
Reply to this: 16800
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| Author: |
Paco |
| Type: |
Update |
| Category: |
BHD |
| Subject: |
Part V of BHR upgrade - BS Oplev + LO1 offset |
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[Paco, JC, Yuta]
We aligned the BS oplev using the new BSOL mirror pair. The main change is now the AOI of the oplev on the BS is quite normal. The output beam in the in-air table was quite large (diverging?) so we had to place a short FL lens in front of the QPD.
Separately, I added the LO1 YAW offset of ~ -2500 counts (before the coil driver changes it was -24500 counts) and saw LO beam hitting LO2. This means the alignment of the LO beam can move downstream. |