40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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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: 16528     Entry time: Mon Dec 20 17:26:13 2021     In reply to: 16526     Reply to this: 16531
Author: Yehonathan 
Type: Update 
Category: BHD 
Subject: SOS assembly 

{Yehonathan, Anchal}

I released the AS1 wires from the winches, removed the adapter from the SOS tower, and removed the Lambda optic from the adapter. Attachment 1 shows the pencil markings on the optic before cleaning. I cleaned the pencil marking from the side of the optic with acetone using swabs until there were no pencil residues on the swab (attachment 2 shows the swab I used next to an unused swab). I was not able to remove the markings completely though (attachment 3).

I remounted the optic with the arrow rotated by 90 degrees counterclockwise.

We hang the adapter on the winches and adjust the height of the magnet and the adapter roll using the winches. We monitor the height of the adapter using a live stream from the Cannon camera. The camera's tilt was adjusted using straight features on the SOS tower. When we ran out of winch travel we adjust the height using the lower EQ stops and pull tight the wires. Attachment 4 shows the alignment of the side magnet with respect to the SOS tower and a side OSEM.

We checked the ghost beam trajectory and it looks much better (attachment 5)

We started realigning the OpLev. We realize that the height of the beam should be 5+14/32" = 5.437 by measuring the height of the screw holding the side OSEM from the table. The real height from the schematics is 5.425 We make the beam parallel with the table first using an iris and then the QPD.

Today, I balanced the counterweight. First using an iris, then by placing a QPD close to the SOS measuring the reflection from AS1. I locked the counterweight's set screw and the QPD Y readout looks good. Attachment 6 shows the QPD y readout near the beat node between pitch and pos. The node comes very close to zero which indicates that the pitch is balanced.

I measured the free-swinging motion using the QPD x and y axes. Attachment 7 shows the spectra of that motion. The major peaks are at 755mHz, 953mHz, and 1.05Hz.

 

Attachment 1: IMG_6312.JPG  5.073 MB  Uploaded Tue Dec 21 12:23:31 2021  | Hide | Hide all
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Attachment 2: IMG_6315.JPG  4.861 MB  Uploaded Tue Dec 21 12:24:03 2021  | Hide | Hide all
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Attachment 3: IMG_6314.JPG  4.571 MB  Uploaded Tue Dec 21 12:24:25 2021  | Hide | Hide all
IMG_6314.JPG
Attachment 4: AS1adapterbalancing.png  161 kB  Uploaded Tue Dec 21 12:25:34 2021  | Hide | Hide all
AS1adapterbalancing.png
Attachment 5: as1ghostbeam2.png  227 kB  Uploaded Tue Dec 21 12:27:21 2021  | Hide | Hide all
as1ghostbeam2.png
Attachment 6: beat.png  26 kB  Uploaded Tue Dec 21 12:45:40 2021  | Hide | Hide all
beat.png
Attachment 7: FreeSwingingSpectra.pdf  14 kB  Uploaded Tue Dec 21 12:48:42 2021  | Hide | Hide all
FreeSwingingSpectra.pdf
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