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Entry  Tue Feb 2 17:09:17 2021, yehonathan, Update, BHD, SOS assembly 20210202_165501.jpg20210202_162452.jpg
    Reply  Tue Feb 2 18:24:54 2021, Koji, Update, BHD, SOS assembly 
       Reply  Thu Feb 4 15:14:55 2021, Yehonathan, Update, BHD, SOS assembly 20210204_144007.jpg
          Reply  Tue Feb 16 13:13:39 2021, Yehonathan, Update, BHD, SOS assembly 
             Reply  Tue Feb 16 15:29:01 2021, Koji, Update, BHD, SOS assembly 
                Reply  Tue Feb 16 22:59:36 2021, Yehonathan, Update, BHD, SOS assembly 
                   Reply  Fri Feb 19 12:21:04 2021, Yehonathan, Update, BHD, SOS assembly 
                      Reply  Fri Mar 26 10:25:37 2021, Yehonathan, Update, BHD, SOS assembly 
                         Reply  Tue Apr 6 15:42:57 2021, Yehonathan, Update, BHD, SOS assembly 20210406_150724.png
                            Reply  Fri Apr 9 20:54:54 2021, Yehonathan, Update, BHD, SOS assembly 20210409_202717.jpg20210409_202755.jpg
                               Reply  Mon Apr 12 17:30:11 2021, Yehonathan, Update, BHD, SOS assembly 20210412_170913.jpg
                                  Reply  Mon May 3 16:49:04 2021, Yehonathan, Update, BHD, SOS assembly 20210503_161422.png20210503_161456.jpg
                                     Reply  Tue Jun 1 16:17:06 2021, Yehonathan, Update, BHD, SOS assembly 
                                        Reply  Wed Jun 2 01:03:19 2021, Koji, Update, BHD, SOS assembly 
                                           Reply  Fri Jun 18 19:02:00 2021, Yehonathan, Update, BHD, SOS assembly 20210618_115017.jpgUntitled_2.png20210618_160041_HDR.jpg
                                              Reply  Fri Jun 18 23:53:08 2021, Koji, Update, BHD, SOS assembly 
                                                 Reply  Tue Jun 22 17:05:26 2021, Yehonathan, Update, BHD, SOS assembly 
                                                    Reply  Tue Jul 27 17:14:18 2021, Yehonathan, Update, BHD, SOS assembly 20210727_154506.png
                                                       Reply  Tue Jul 27 20:12:53 2021, Koji, Update, BHD, SOS assembly 
                                              Reply  Mon Jun 28 12:35:19 2021, Yehonathan, Update, BHD, SOS assembly toomuchglue1.pngtoomuchglue2.pngdirtydumbell.pngcleandumbell.pngassembly_on_metalbracket.png
                                                 Reply  Tue Jun 29 20:45:52 2021, Yehonathan, Update, BHD, SOS assembly 20210629_135736.jpg20210629_135746.jpg
                                                    Reply  Thu Jul 1 16:45:25 2021, Yehonathan, Update, BHD, SOS assembly 
                                                       Reply  Wed Jul 28 12:00:35 2021, Yehonathan, Update, BHD, SOS assembly 
                                                          Reply  Thu Sep 23 18:18:07 2021, Yehonathan, Update, BHD, SOS assembly dumbell_before.pngdumbell_after.png
                                                             Reply  Tue Oct 26 10:17:14 2021, Yehonathan, Update, BHD, SOS assembly 
                                                                Reply  Thu Oct 28 23:13:19 2021, Yehonathan, Update, BHD, SOS assembly OpLev_Setup.jpgsuspended_optic.png20211029_113011.jpg20211029_113052.jpg
                                                                   Reply  Tue Nov 2 15:02:03 2021, Yehonathan, Update, BHD, SOS assembly FreeSwingingSpectra.pdf
                                                                      Reply  Tue Nov 2 22:50:30 2021, Koji, Update, BHD, SOS assembly 
                                                                         Reply  Mon Nov 8 17:22:27 2021, Yehonathan, Update, BHD, SOS assembly Magnets_Positions.pngAdapters_Order.png
                                                                            Reply  Tue Nov 9 11:11:37 2021, Yehonathan, Update, BHD, SOS assembly 20211109_110408.jpg
                                                                               Reply  Fri Nov 12 23:47:29 2021, Yehonathan, Update, BHD, SOS assembly 
                                                                                  Reply  Tue Nov 16 17:42:46 2021, Yehonathan, Update, BHD, SOS assembly 20211115_170320_HDR.jpg20211116_163846.jpgmagnet_height_check(1).pngside_blcok_touching_1.pngside_blcok_touching_2.png
                                                                                     Reply  Tue Nov 16 18:28:53 2021, Koji, Update, BHD, SOS assembly D2100546_Wire_Block.pdfD2100546_Wire_Block.png
                                                                                        Reply  Wed Nov 24 14:15:15 2021, Yehonathan, Update, BHD, SOS assembly 
                                                                                           Reply  Wed Dec 1 12:57:08 2021, Yehonathan, Update, BHD, SOS assembly 7x
                                                                                              Reply  Mon Dec 6 18:23:04 2021, Yehonathan, Update, BHD, SOS assembly signal-2021-12-06-165751_001.jpeg
                                                                                                 Reply  Thu Dec 9 21:57:35 2021, Yehonathan, Update, BHD, SOS assembly balancingsos2.pngFreeSwingingSpectra.pdf
                                                                                                    Reply  Tue Dec 14 14:02:33 2021, Yehonathan, Update, BHD, SOS assembly magnetcentring.pngFreeSwingingSpectra.pdf
                                                                                                       Reply  Wed Dec 15 22:09:53 2021, Yehonathan, Update, BHD, SOS assembly 
                                                                                                          Reply  Thu Dec 16 18:16:36 2021, Yehonathan, Update, BHD, SOS assembly chippedmirror.pngIMG_6311.JPGIMG_6310.JPGIMG_6309.JPG
                                                                                                             Reply  Fri Dec 17 17:50:17 2021, Yehonathan, Update, BHD, SOS assembly AS1rollbalance.pngAS1Magnet_height.pngghostbeam.pnglambdaopticarrow.jpg
                                                                                                                Reply  Fri Dec 17 19:16:45 2021, Koji, Update, BHD, SOS assembly 
                                                                                                                   Reply  Fri Dec 17 22:16:07 2021, Yehonathan, Update, BHD, SOS assembly 
                                                                                                                      Reply  Sat Dec 18 00:56:14 2021, Koji, Update, BHD, SOS assembly 
                                                                                                                         Reply  Mon Dec 20 13:52:01 2021, Koji, Update, BHD, SOS assembly 
                                                                                                                            Reply  Mon Dec 20 17:26:13 2021, Yehonathan, Update, BHD, SOS assembly 7x
                                                                                                                               Reply  Tue Dec 21 18:04:46 2021, Yehonathan, Update, BHD, SOS assembly 
                                                                                                                                  Reply  Tue Jan 4 18:27:23 2022, Paco, Update, BHD, SOS assembly -- PR3 PR3_roll_balance.pngPR3_magnet_height.pngFreeSwingingSpectra.pdfPXL_20220104_231742123.jpgPXL_20220104_232809203.jpg
                                                                                                                                     Reply  Wed Jan 5 19:18:06 2022, Yehonathan, Update, BHD, SOS assembly -- AS4 AS4_roll_balance.pngAS_4_magnet_height.pngFreeSwingingSpectra.pdf
                                                                                                                                        Reply  Thu Jan 6 17:00:20 2022, Yehonathan, Update, BHD, SOS assembly -- LO2 LO2_roll_balance.pngLO2_magnet_height.pngFreeSwingingSpectra.pdf
                                                                                                                                           Reply  Thu Jan 6 17:16:51 2022, Yehonathan, Update, BHD, Using Peek screws/nuts 
                                                                                                                                           Reply  Fri Jan 7 17:59:45 2022, Yehonathan, Update, BHD, SOS assembly -- SR2 SR2_roll_balance.pngSR2_magnet_height.pngFreeSwingingSpectra.pdf
                                                                                                                                              Reply  Fri Jan 7 18:24:25 2022, Koji, Update, BHD, SOS assembly -- SR2 
                                                                                                                                                 Reply  Mon Jan 10 14:00:44 2022, not Koji, Update, BHD, SOS assembly -- SR2 
                                                                                                                                                    Reply  Tue Jan 11 09:53:14 2022, not Koji, Update, BHD, SOS assembly -- Peek screws and nuts 
                                                                                                                                                       Reply  Thu Jan 13 16:08:00 2022, Yehonathan, Update, BHD, gluing magnets after AS1/4 misfortune 
                                                                                                                                                          Reply  Fri Jan 14 17:33:10 2022, Yehonathan, Update, BHD, AS4 resurrection AS4_roll_balance2.pngAS4_magnet_height2.pngFreeSwingingSpectra.pdf
                                                                                                                                                             Reply  Wed Jan 19 18:15:34 2022, Yehonathan, Update, BHD, AS1 resurrection AS1_roll_balance2.pngAS1_magnet_heigh2.pngFreeSwingingSpectra.pdfIMG_6324.JPG
                                                                                                                                                                Reply  Thu Jan 20 12:10:51 2022, Yehonathan, Update, BHD, AS1 resurrection FreeSwingingSpectra.pdfFreeSwingingSpectra_div_20mV.pdfFreeSwingingSpectra_div_50mV.pdf
                                                                                                                                                                   Reply  Mon Jan 24 17:58:21 2022, Yehonathan, Update, BHD, PR2 Suspension 
                                                                                                                                                                      Reply  Tue Jan 25 18:37:12 2022, TYehonathan, Update, BHD, PR2 Suspension PR2_magnet_height.pngPR2_roll_balance.pngFreeSwingingSpectra_div_50mV.pdf
                                                                                                                                                                         Reply  Thu Feb 24 18:05:58 2022, Yehonathan, Update, BHD, Re-susspension of AS1 signal-2022-02-24-173933_003.jpegsignal-2022-02-24-173933_002.jpeg
                                                                                                                                                                            Reply  Wed Mar 2 14:02:43 2022, Yehonathan, Update, BHD, Re-susspension of AS1 
                                                                                                                                                                               Reply  Thu Mar 3 17:09:46 2022, Paco, Update, BHD, Re-susspension of AS1 
                                                                                                                                                                                  Reply  Mon Mar 7 16:56:08 2022, Yehonathan, Update, BHD, Re-susspension of AS1 signal-2022-03-07-171520_001.pngsignal-2022-03-07-172659_001.jpegsignal-2022-03-07-172659_003.jpeg
                                                                                                                                                                                     Reply  Mon Mar 7 18:53:16 2022, Koji, Update, BHD, Re-susspension of AS1 
                                                                                                                                                                                     Reply  Tue Mar 8 12:24:13 2022, Yehonathan, Update, BHD, Re-susspension of AS1 AS1_Roll_Balance.pngAS1_Height_Balance.pngFreeSwingingSpectra_new.pdf
                                                                                                                                                                                        Reply  Tue Mar 8 19:29:36 2022, Paco, Update, BHD, Re-balance of AS1 
                                                                                                                                                                                           Reply  Wed Mar 9 09:35:26 2022, Paco, Update, BHD, Re-balance of AS1 
Message ID: 16505     Entry time: Tue Dec 14 14:02:33 2021     In reply to: 16497     Reply to this: 16511
Author: Yehonathan 
Type: Update 
Category: BHD 
Subject: SOS assembly 

{Yehonathan, Paco}

I fixed the overall height of the adapter (attachment 1). I put an OSEM next to the side magnet. I positioned a camera in front of the SOS and connected it to my laptop for live streaming. I painted a line indicating the height of the OSEM plates and a line in between with the mean height. I discarded the wire clamp on the suspension block I released the wires from the winches and pulled on them until the magnet was roughly in the right position. I clamped the wires back on the winches and adjusted them until the magnet was on the middle line. I also verified that the roll of the adapter is aligned as before by making sure that the horizontal features on the adapter are parallel to the horizontal features on the SOS tower.

The wires were clamped to the suspension block using a new wire clamp.

I Found that locking the counterweight setscrew changes the alignment. Today we verified this effect. We released the setscrew and pre-compensated by adjusting the counterweight such that when the setscrew was locked the mirror was aligned.

We measured mechanical resonances (attachment 2). This time the yaw motion was very quiet so we got a smaller peak for the yaw. The peaks are the same as before. Y readout has peaks around the pitch and pos resonances that don't appear in the X readout. I'm not sure what they are. Maybe coming from the QPD electronics.

We locked the adapter using the EQ stops. We made sure the alignment stays close to ideal.

We installed OSEMs on the SOS. We chose suboptimal OSEMs because LO1 will only be used for steering. I made a spreadsheet copying the OSEM catalog into it. There we mark which OSEM goes where.

I cleaned the optic using the ion gun with a pressure of 30 PSI.

The next steps are:

1. Engrave the SOS tower.

2. Cut the wire at the winches and remove the winch adapter plate.

3. Wrap the SOS with foil.

4. Install the SOS in the vacuum chamber.

 

 

Attachment 1: magnetcentring.png  59 kB  | Hide | Hide all
magnetcentring.png
Attachment 2: FreeSwingingSpectra.pdf  14 kB  Uploaded Tue Dec 14 23:35:08 2021  | Hide | Hide all
FreeSwingingSpectra.pdf
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