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: 16710     Entry time: Mon Mar 7 16:56:08 2022     In reply to: 16698     Reply to this: 16711   16714
Author: Yehonathan 
Type: Update 
Category: BHD 
Subject: Re-susspension of AS1 

{Paco, Yehonathan}

We tried to roughly balance the adapter with two counterweights at the front, like with the other thin optics using an iris. As before, we couldn't get the beam above the iris hole no matter how much we inserted the counterweights into the adapter. We noticed that one of the side blocks is actually the one where the clearance for the wire was made on the wrong side. So there was clearance on both the up and bottom sides of the side block (see attachment 1).

Could this be the cause of the balancing issue? Running out of ideas on how to fix it we gave it a try and replaced it with a spare side block. We also found that the wire on the other side block was kinked so we replaced the wire on this one as well.

After inserting new wires into the side blocks, we hung the adapter on the winches and the beam was above the iris aperture! How could this tiny amount of missing mass make this much difference?

We were able to roughly balance the adapter.

We then tried to balance the roll of the adapter but accidentally knocked off the side magnet 😫.

We usually glue several side magnets together and they all together support the metallic plate on which the magnets are magnetically attached to. This time we had only one side magnet to glue so instead of trying to glue the magnet vertically we are trying to glue it horizontally using a flat surface and a stage to clamp it (attachments 2,3).

BTW, the HeNe was not working when we came into the cleanroom. We realized it was the old HeNe that we already determined to be broken but there was no sign on it. I attached a "BAD" sign on it and replaced it with the new HeNe. The OpLeve beam was realigned. All of this happened before all the things described above

Attachment 1: signal-2022-03-07-171520_001.png  379 kB  | Hide | Hide all
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Attachment 2: signal-2022-03-07-172659_001.jpeg  217 kB  | Hide | Hide all
signal-2022-03-07-172659_001.jpeg
Attachment 3: signal-2022-03-07-172659_003.jpeg  366 kB  | Hide | Hide all
signal-2022-03-07-172659_003.jpeg
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