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40m Log |
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Tue Feb 2 17:09:17 2021, yehonathan, Update, BHD, SOS assembly 
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Tue Feb 2 18:24:54 2021, Koji, Update, BHD, SOS assembly
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Thu Feb 4 15:14:55 2021, Yehonathan, Update, BHD, SOS assembly
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Tue Feb 16 13:13:39 2021, Yehonathan, Update, BHD, SOS assembly
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Tue Feb 16 15:29:01 2021, Koji, Update, BHD, SOS assembly
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Tue Feb 16 22:59:36 2021, Yehonathan, Update, BHD, SOS assembly
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Fri Feb 19 12:21:04 2021, Yehonathan, Update, BHD, SOS assembly
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Fri Mar 26 10:25:37 2021, Yehonathan, Update, BHD, SOS assembly
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Tue Apr 6 15:42:57 2021, Yehonathan, Update, BHD, SOS assembly
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Fri Apr 9 20:54:54 2021, Yehonathan, Update, BHD, SOS assembly 
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Mon Apr 12 17:30:11 2021, Yehonathan, Update, BHD, SOS assembly
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Mon May 3 16:49:04 2021, Yehonathan, Update, BHD, SOS assembly 
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Tue Jun 1 16:17:06 2021, Yehonathan, Update, BHD, SOS assembly
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Wed Jun 2 01:03:19 2021, Koji, Update, BHD, SOS assembly
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Fri Jun 18 19:02:00 2021, Yehonathan, Update, BHD, SOS assembly  
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Fri Jun 18 23:53:08 2021, Koji, Update, BHD, SOS assembly
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Tue Jun 22 17:05:26 2021, Yehonathan, Update, BHD, SOS assembly
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Tue Jul 27 17:14:18 2021, Yehonathan, Update, BHD, SOS assembly
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Tue Jul 27 20:12:53 2021, Koji, Update, BHD, SOS assembly
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Mon Jun 28 12:35:19 2021, Yehonathan, Update, BHD, SOS assembly    
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Tue Jun 29 20:45:52 2021, Yehonathan, Update, BHD, SOS assembly 
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Thu Jul 1 16:45:25 2021, Yehonathan, Update, BHD, SOS assembly
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Wed Jul 28 12:00:35 2021, Yehonathan, Update, BHD, SOS assembly
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Thu Sep 23 18:18:07 2021, Yehonathan, Update, BHD, SOS assembly 
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Tue Oct 26 10:17:14 2021, Yehonathan, Update, BHD, SOS assembly
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Thu Oct 28 23:13:19 2021, Yehonathan, Update, BHD, SOS assembly   
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Tue Nov 2 15:02:03 2021, Yehonathan, Update, BHD, SOS assembly
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Tue Nov 2 22:50:30 2021, Koji, Update, BHD, SOS assembly
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Mon Nov 8 17:22:27 2021, Yehonathan, Update, BHD, SOS assembly 
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Tue Nov 9 11:11:37 2021, Yehonathan, Update, BHD, SOS assembly
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Fri Nov 12 23:47:29 2021, Yehonathan, Update, BHD, SOS assembly
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Tue Nov 16 17:42:46 2021, Yehonathan, Update, BHD, SOS assembly    
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Tue Nov 16 18:28:53 2021, Koji, Update, BHD, SOS assembly 
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Wed Nov 24 14:15:15 2021, Yehonathan, Update, BHD, SOS assembly
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Wed Dec 1 12:57:08 2021, Yehonathan, Update, BHD, SOS assembly 7x
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Mon Dec 6 18:23:04 2021, Yehonathan, Update, BHD, SOS assembly
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Thu Dec 9 21:57:35 2021, Yehonathan, Update, BHD, SOS assembly 
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Tue Dec 14 14:02:33 2021, Yehonathan, Update, BHD, SOS assembly 
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Wed Dec 15 22:09:53 2021, Yehonathan, Update, BHD, SOS assembly
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Thu Dec 16 18:16:36 2021, Yehonathan, Update, BHD, SOS assembly   
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Fri Dec 17 17:50:17 2021, Yehonathan, Update, BHD, SOS assembly   
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Fri Dec 17 19:16:45 2021, Koji, Update, BHD, SOS assembly
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Fri Dec 17 22:16:07 2021, Yehonathan, Update, BHD, SOS assembly
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Sat Dec 18 00:56:14 2021, Koji, Update, BHD, SOS assembly
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Mon Dec 20 13:52:01 2021, Koji, Update, BHD, SOS assembly
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Mon Dec 20 17:26:13 2021, Yehonathan, Update, BHD, SOS assembly 7x
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Tue Dec 21 18:04:46 2021, Yehonathan, Update, BHD, SOS assembly
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Tue Jan 4 18:27:23 2022, Paco, Update, BHD, SOS assembly -- PR3    
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Wed Jan 5 19:18:06 2022, Yehonathan, Update, BHD, SOS assembly -- AS4  
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Thu Jan 6 17:00:20 2022, Yehonathan, Update, BHD, SOS assembly -- LO2  
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Thu Jan 6 17:16:51 2022, Yehonathan, Update, BHD, Using Peek screws/nuts
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Fri Jan 7 17:59:45 2022, Yehonathan, Update, BHD, SOS assembly -- SR2  
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Fri Jan 7 18:24:25 2022, Koji, Update, BHD, SOS assembly -- SR2
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Mon Jan 10 14:00:44 2022, not Koji, Update, BHD, SOS assembly -- SR2
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Tue Jan 11 09:53:14 2022, not Koji, Update, BHD, SOS assembly -- Peek screws and nuts
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Thu Jan 13 16:08:00 2022, Yehonathan, Update, BHD, gluing magnets after AS1/4 misfortune
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Fri Jan 14 17:33:10 2022, Yehonathan, Update, BHD, AS4 resurrection  
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Wed Jan 19 18:15:34 2022, Yehonathan, Update, BHD, AS1 resurrection   
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Thu Jan 20 12:10:51 2022, Yehonathan, Update, BHD, AS1 resurrection  
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Mon Jan 24 17:58:21 2022, Yehonathan, Update, BHD, PR2 Suspension
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Tue Jan 25 18:37:12 2022, TYehonathan, Update, BHD, PR2 Suspension  
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Thu Feb 24 18:05:58 2022, Yehonathan, Update, BHD, Re-susspension of AS1 
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Wed Mar 2 14:02:43 2022, Yehonathan, Update, BHD, Re-susspension of AS1
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Thu Mar 3 17:09:46 2022, Paco, Update, BHD, Re-susspension of AS1
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Mon Mar 7 16:56:08 2022, Yehonathan, Update, BHD, Re-susspension of AS1  
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Mon Mar 7 18:53:16 2022, Koji, Update, BHD, Re-susspension of AS1
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Tue Mar 8 12:24:13 2022, Yehonathan, Update, BHD, Re-susspension of AS1  
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Tue Mar 8 19:29:36 2022, Paco, Update, BHD, Re-balance of AS1
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Wed Mar 9 09:35:26 2022, Paco, Update, BHD, Re-balance of AS1
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Message ID: 16550
Entry time: Thu Jan 6 17:00:20 2022
In reply to: 16544
Reply to this: 16551
16556
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Author: |
Yehonathan |
Type: |
Update |
Category: |
BHD |
Subject: |
SOS assembly -- LO2 |
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{Paco, Yehonathan}
Today we suspended LO2 (E1800089) which Anchal has loaded into the thick optic adapter. Attachments 1,2 show the height and roll balance adjustments.
I realigned the opLev setup and balanced the suspended mass. We figured that if we use 2 counterweights we will be 1 short. We decided to use 1 mass at the back of the adapter. This has the additional advantage that the Viton tip on lower back EQ stop can touch it and act normally. The optic was successfully balanced in this way. Attachment 3 shows the motion spectra on the QPD. There are major peaks at 712 mHz, 854 mHz, 876 mHz, and 996 mHz. As expected using only 1 counterweight raised the center of mass and lowered the pitch resonance frequency. The optic was locked keeping the alignment fixed on the center of the QPD, OSEMs were inserted and the SOS tower was engraved.
We should apply some glue to the counterweight to prevent it from spinning on the setscrew. |
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