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40m Log |
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Mon Oct 25 13:23:45 2021, Anchal, Summary, BHD, Before photos of BSC
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Mon Oct 25 17:37:42 2021, Anchal, Summary, BHD, Part I of BHR upgrade - Removed optics from BSC 
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Tue Oct 26 16:56:22 2021, Paco, Summary, BHD, Part I of BHR upgrade - Locked PMC and IMC
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Wed Oct 27 16:27:16 2021, Anchal, Summary, BHD, Part II of BHR upgrade - Prep 
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Wed Oct 27 16:31:35 2021, Anchal, Summary, BHD, Part III of BHR upgrade - Removal of PR2 Small Suspension
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Thu Oct 28 16:32:32 2021, Paco, Summary, BHD, Part IV of BHR upgrade - Removal of BSC eastern optics
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Fri Nov 5 12:21:16 2021, Anchal, Summary, BHD, Part VI of BHR upgrade - Removal of ITMYC optics  
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Wed Dec 15 16:11:38 2021, Anchal, Summary, BHD, Part VIII of BHR upgrade - Placed LO1
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Wed Dec 15 17:44:18 2021, Koji, Summary, BHD, Part VIII of BHR upgrade - Placed LO1
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Thu Jan 6 21:04:41 2022, Anchal, Summary, BHD, Part VIII of BHR upgrade - LO1 OSEMs inserted
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Mon Jan 10 14:52:51 2022, Anchal, Summary, BHD, LO1 OSEMs roughly calibrated and noise measured 
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Mon Jan 10 18:36:41 2022, Anchal, Summary, BHD, LO1 free swinging test set to trigger
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Tue Jan 11 12:19:12 2022, Anchal, Summary, BHD, LO1 Input Matrix Diagonalization performed. 
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Mon Jan 24 18:53:09 2022, Anchal, Summary, BHD, Part VIII of BHR upgrade - LO2 placed and OSEMs tuned
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Tue Jan 25 10:55:02 2022, Anchal, Summary, BHD, Part VIII of BHR upgrade - LO2 input matrix diagonalization performed.
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Tue Jan 25 16:42:03 2022, Anchal, Summary, BHD, Reduced filter gains in all damped new SOS
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Thu Jan 6 11:54:20 2022, Anchal, Summary, BHD, Part IX of BHR upgrade - Placed AS1 and AS4
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Fri Jan 7 16:17:42 2022, Anchal, Summary, BHD, Part IX of BHR upgrade - Placed AS1 and AS4 filters
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Sat Jan 8 16:01:42 2022, Paco, Summary, BHD, Part IX of BHR upgrade - Placed LO2 filters
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Tue Jan 18 14:26:09 2022, Paco, Summary, BHD, Part IX of BHR upgrade - Placed remaining filters SR2, PR3, PR2
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Tue Jan 11 18:18:29 2022, Anchal, Summary, BHD, Attempted OSEM installation on AS1
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Tue Jan 11 18:40:25 2022, Anchal, Summary, BHD, AS1 Sat Amp has a PCB issue
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Thu Jan 13 09:48:41 2022, Anchal, Summary, BHD, AS1 Sat Amp fixed 
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Thu Jan 13 12:24:08 2022, Anchal, Summary, BHD, AS1 SD and LR magnets broke
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Mon Jan 24 21:18:40 2022, Paco, Summary, BHD, Part IX of BHR upgrade - AS1 placed and OSEM tuned
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Tue Jan 25 11:02:54 2022, Anchal, Summary, BHD, Part IX of BHR upgrade - AS1 free swing test failed
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Thu Jan 27 08:27:34 2022, Paco, Summary, BHD, Part IX of BHR upgrade - AS1 inspection and correction
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Wed Feb 2 16:32:02 2022, Anchal, Summary, BHD, Part IX of BHR upgrade - AS1 free swing test still not good 
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Tue Mar 15 18:42:37 2022, Anchal, Summary, BHD, Part IX of BHR upgrade - AS1 resuspended and OSEMs tuned
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Tue Mar 15 18:45:12 2022, Anchal, Summary, BHD, Part X of BHR upgrade - BHDBS Path setup
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Thu Jan 13 12:29:27 2022, Anchal, Summary, BHD, AS4 LR magnet broke
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Fri Jan 14 18:12:47 2022, Anchal, Summary, BHD, AS4 placed in ITMY Chamber, OSEMs connected
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Tue Jan 18 18:19:22 2022, Koji, Summary, BHD, AS4 placed in ITMY Chamber, OSEMs connected 
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Wed Jan 19 12:56:52 2022, Paco, Summary, BHD, AS4 OSEMs installation
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Thu Jan 20 16:42:55 2022, Paco, Update, BHD, AS4 OSEMs installation - part 2
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Thu Jan 20 18:16:29 2022, Anchal, Update, BHD, AS4 set to trigger free swing test
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Fri Jan 21 16:40:10 2022, Anchal, Update, BHD, AS4 Input Matrix Diagonalization performed. 
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Mon Jan 24 17:12:27 2022, rana, Update, BHD, AS4 Input Matrix Diagonalization performed.
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Mon Jan 24 20:48:48 2022, Anchal, Update, BHD, AS4 Input Matrix Diagonalization performed.
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Tue Jan 18 15:19:49 2022, Paco, Summary, BHD, Part IV of BHR upgrade - Replaced old SR3 with SOS SR2. OSEM tuning attemtped. 
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Tue Jan 18 18:16:28 2022, Anchal, Summary, BHD, Part IV of BHR upgrade - SR2 Sat Amp Box inspection
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Wed Jan 19 12:50:10 2022, Anchal, Summary, BHD, Part IV of BHR upgrade - SR2 OSEM tuning progress.
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Thu Jan 20 17:03:36 2022, Anchal, Summary, BHD, Part IV of BHR upgrade - SR2 OSEM tuned.
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Thu Jan 20 18:41:55 2022, Anchal, Summary, BHD, SR2 set to trigger free swing test
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Fri Jan 21 11:24:42 2022, Anchal, Summary, BHD, SR2 Input Matrix Diagonalization performed. 
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Thu Oct 28 17:01:54 2021, Anchal, Summary, BHD, Part III of BHR upgrade - Adding temp fixed flat mirror for PR2
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Thu Jan 27 17:57:35 2022, Anchal, Summary, BHD, Part III of BHR upgrade - Replaced small suspended PR3 with new SOS PR3 and OSEM tuning
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Thu Jan 27 18:03:36 2022, Paco, Summary, BHD, Part III of BHR upgrade - Install PR2, balance, and attempt OSEM tuning
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Thu Jan 27 20:46:38 2022, Koji, Summary, BHD, Part III of BHR upgrade - Install PR2, balance, and attempt OSEM tuning 
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Fri Jan 28 10:37:59 2022, Paco, Summary, BHD, Part III of BHR upgrade - PR2 OSEM finalized, reinsall LO1 OSEMs
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Fri Jan 28 11:30:52 2022, Koji, Summary, BHD, Part III of BHR upgrade - PR2 OSEM finalized, reinsall LO1 OSEMs
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Fri Jan 28 16:35:18 2022, Anchal, Summary, BHD, AS1, PR2 and PR3 set to trigger free swing test
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Wed Feb 2 16:22:00 2022, Anchal, Summary, BHD, Part III of BHR upgrade - PR2 inpute matrix diagonalized 
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Wed Feb 2 16:27:57 2022, Anchal, Summary, BHD, Part III of BHR upgrade - PR3 inpute matrix diagonalized 
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Wed Oct 27 16:38:02 2021, Anchal, Summary, BHD, Part II of BHR upgrade - Relocation of TT2 and MMT1/2 alignment
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Wed Oct 27 18:11:37 2021, Koji, Summary, BHD, Part II of BHR upgrade - Relocation of TT2 and MMT1/2 alignment
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Wed Oct 27 18:16:45 2021, Koji, Summary, BHD, Part II of BHR upgrade - Relocation of TT2 and MMT1/2 alignment
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Thu Mar 17 17:23:22 2022, Anchal, Summary, BHD, Part IIa of BHR upgrade - Green laser alignment
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Mon Mar 21 18:24:07 2022, Anchal, Summary, BHD, Part IIa of BHR upgrade - Green laser alignment on Yarm
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Thu Mar 24 19:20:28 2022, Anchal, Summary, BHD, Part IIa of BHR upgrade - Green laser alignment on Yarm
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Fri Mar 25 18:20:28 2022, Anchal, Summary, BHD, Part IIa of BHR upgrade - Green laser alignment on Yarm
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Sat Mar 26 13:04:38 2022, Paco, Summary, BHD, Part IIa of BHR upgrade - Green laser alignment on Yarm
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Thu Mar 31 18:58:16 2022, Ian MacMillan, Summary, BHD, Part IIa of BHR upgrade - IR laser alignment on Xarm
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Tue Apr 5 18:15:06 2022, Anchal, Summary, BHD, Part IIa of BHR upgrade - IR laser alignment on Xarm
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Wed Apr 6 01:20:48 2022, Koji, Summary, BHD, Part IIa of BHR upgrade - IR laser alignment on Xarm   
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Wed Apr 6 22:51:47 2022, Koji, Summary, BHD, Part IIa of BHR upgrade - IR laser alignment on Xarm 
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Wed Apr 6 12:03:51 2022, Anchal, Summary, BHD, Part IIa of BHR upgrade - IR laser alignment on Yarm
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Thu Apr 7 17:59:51 2022, Anchal, Summary, BHD, Part IIa of BHR upgrade - IR laser alignment on Yarm
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Fri Apr 8 17:21:31 2022, Ian MacMillan, Summary, BHD, Part IIa of BHR upgrade - IR laser alignment on Yarm
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Mon Apr 11 21:13:21 2022, Paco, Summary, BHD, Part IIa of BHR upgrade - POY11 debugging
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Mon Apr 11 21:44:14 2022, Koji, Summary, BHD, Part IIa of BHR upgrade - POY11 debugging  
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Thu Apr 14 11:52:57 2022, yehonathan, Summary, BHD, Part IIa of BHR upgrade - POY11 debugging 
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Thu Apr 14 18:39:13 2022, Paco, Summary, BHD, Part IIa of BHR upgrade - POY11 debugging
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Mon Apr 18 17:53:45 2022, Paco, Summary, BHD, Part IIa of BHR upgrade - POY11 debugging
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Message ID: 16433
Entry time: Wed Oct 27 16:38:02 2021
In reply to: 16431
Reply to this: 16434
16435
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Author: |
Anchal |
Type: |
Summary |
Category: |
BHD |
Subject: |
Part II of BHR upgrade - Relocation of TT2 and MMT1/2 alignment |
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[Anchal, Paco]
We opened BSC and Injection Chamber doors. We removed two stacked counterweights from near the center of the BS table, from behind TT2 and placed them in the Xend flow bench. Then we unscrewed TT2 and relocated it to the new BHR layout position. This provided us with the target for the alignment of MMT1 and MMT2 mirrors.
While aligning MMT1 and MMT2, we realized that the BHR layout underestimated the clearance of the beam from MMT2 to TT2, from the TT1 suspension unit. The TT1 suspension stage was clipping our beam going to TT2. To rectify this, we decided to move the MMT2 mirror mount about a cm South and retry. We were able to align the beam to the TT2 optic, but it is a bit off-center. The reflection of TT2 now is going in the general direction of the ITMX chamber. We stopped our work here as fatigue was setting in. Following are some thoughts and future directions:
- We realized that the output beam from the mode cleaner moves a lot (by more than a cm at MMT2) between different locks. Maybe that's just because of our presence. But we wonder how much clearance all beams must have from MC3 to TT2.
- Currently, we think the Faraday Isolator might be less than 2 cm away from the beam between MMT1 and MMT2 and the TT1 suspension is less than 2 cm away from MMT2 and TT2.
- Maybe we can fix these by simply changing the alignment on TT1 which was fixed for our purposes.
- We definitely need to discuss the robustness of our path a bit more before we proceed to the next part of the upgrade.
Thu Oct 28 17:00:52 2021 After Photos: https://photos.app.goo.gl/wNL4dxPyEgYTKQFG9 |