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  40m Log, Page 157 of 344  Not logged in ELOG logo
ID Dateup Author Type Category Subject Text Attachments
  7848   Tue Dec 18 07:03:40 2012 ManasaUpdateGeneralVent plan: WE VENT TOMORROW

    

       
            
  
  7849   Tue Dec 18 10:43:20 2012 SteveUpdateVACvent has completed The 40m vacuum envelope is at atm   
It took 4.5 hours at ~3 Torr/min speed. Atm1
 
 vent74.pngbvent.pngbefVent.png 
  7850   Tue Dec 18 15:32:29 2012 JenneUpdateSUSTT angle of incidence


   
        
            
  
  7851   Tue Dec 18 15:51:33 2012 JenneUpdateIOOOld G&H TT mirrors' phase maps measuredI took the 2 G&H mirrors that we de-installed
from PR3 and SR3 over to GariLynn to measure
their phase maps. Data is in the same place
  
  7852   Tue Dec 18 16:37:17 2012 JamieUpdateAlignmentPost vent, pre door removal alignment[Jenne, Manasa, Jamie]
Now that we're up to air we relocked
the mode cleaner, tweaked up the alignment,
 mcspot_post_vent.pdf 
  7853   Tue Dec 18 16:37:40 2012 SteveUpdateVAClast RGA scan before vent 
 
 pd74m36d.png36d_vacuum_normal.png 
  7854   Tue Dec 18 16:44:00 2012 rijuUpdate Photodiode transimpedanceToday I measured the dark current of the
PDA10CF. The output of the PD was connected
to the A channel of the network analyzer,
  
  7855   Wed Dec 19 11:14:25 2012 SteveUpdateSUSBeCu wire in stock

    

       
            
  
  7856   Wed Dec 19 11:53:23 2012 SteveUpdateVACAC removed Koji, Manasa, Jenne, Jamie, Bob and
Steve
Access connector removed this morning
 workingatatm.png 
  7857   Wed Dec 19 18:40:00 2012 JenneUpdateIOOPZT1 removed, TT1 in place[Manasa, Jamie, Jenne]
PZT1 has been removed, and is wrapped
in foil and stored in a (labeled) plastic
  
  7858   Wed Dec 19 19:28:12 2012 ManasaUpdateIOOPZT1 removed, TT1 in place

    

       
            
  
  7859   Wed Dec 19 20:18:51 2012 ranaUpdateComputersWe are Changing the Passwerdz next week----Be Prepared
http://xkcd.com/936/
  
  7860   Wed Dec 19 21:35:33 2012 KojiSummaryGeneralFirst Contact Training with Margot[Koji, Steve]
First
Contact Training with Margot
  
  7861   Thu Dec 20 10:11:12 2012 ManasaUpdateIOOTT1 connections[Jamie,Manasa]
We've been trying to figure out the
connector for the TTs. Since, we found the
  
  7862   Thu Dec 20 10:35:27 2012 SteveUpdateIOOTT1 connections

    

       
            
  
  7863   Thu Dec 20 12:14:19 2012 JamieUpdateGeneralproblem with in-vac wiring for TTsNic and I discovered a problem with the
in-vac wiring from the feed-thru to the top
of the table.  Pin 13 at the top of
  
  7864   Thu Dec 20 17:13:56 2012 JamieUpdateGeneralhow to deal with problem with in-vac wiring for TTsSo this is obviously a general problem
for all the TTs.  Our in-vacuum wiring
is unfortunately mirrored relative to that
  
  7865   Thu Dec 20 18:33:52 2012 JamieUpdateGeneralin-vac adapter cables for TTsWe need short cables that mirror the pins:
 invac-adapter-cable.pdf 
  7866   Thu Dec 20 19:46:20 2012 ranaConfigurationEnvironmentControl Room Projector Needs
 StevePurple.JPG 
  7868   Fri Dec 21 09:55:23 2012 SteveUpdateGeneralin-vac adapter cables for TTs 
 Accu-Glass
is closed till Jan 2, 2013
 extensioncable.pdfgenderchanger.pdf 
  7869   Fri Dec 21 16:50:30 2012 RanaUpdateSUSTT in vac DB25 pin swapping[Koji, Rana, Nic, Steve] 
  
  7870   Fri Dec 21 19:49:39 2012 RijuUpdate Photodiode transimpedanceI have repeated the transimpedance measurement
of PDA10CF. Also made the dark current noise
measurement by connecting the PDA10CF output
 PDA10CFrepeat.pdfdarknoiseVpda10cf.pdfdarknoiseApda10cf.pdfPDA10CF_z.pdf 
  7871   Wed Jan 2 06:52:50 2013 KojiUpdateSUSTT in vac DB25 pin swapping[Koji, Rana, Nic, Steve]

I recalled that we used an optical
  
  7872   Wed Jan 2 15:33:23 2013 JenneHowToLockingWe should retry in-air lockingImmediate things to do include finishing
installation of new TTs and re-routing of
oplev paths in the BS chamber, but after
  
  7873   Thu Jan 3 19:19:59 2013 ranaHowToElectronicscable racksToday I found 3 power cables in the
orange Pomona cable tray, put in
so that the cables were 
  
  7874   Thu Jan 3 20:34:43 2013 RijuUpdate Photodiode transimpedanceToday I have measured the transimpedance
and dark-noise of the MC-REFL PD.
For transimpedance measurement I
  
  7875   Fri Jan 4 13:23:10 2013 ranaUpdateElectronicsPhotodiode transimpedanceYou have to correct this transimpedance
ratio by correcting for the different levels
of DC photocurrent in the two devices.
  
  7876   Fri Jan 4 15:11:28 2013 JenneUpdate TT[Jenne, Koji]
D - UL
B - UR
  
  7877   Mon Jan 7 00:08:16 2013 JenneHowToAlignmentIn-vac planList of things to do, in order:
* Remove BS heavy door. 
Steve,
  
  7878   Mon Jan 7 16:45:30 2013 JenneUpdateAlignmentRisers to bring TTs to correct beam height are wrong[Jenne, with backup from Koji and Steve]
Short version:
TT1 was installed without a riser,
 SR3_7Jan2013_ExtraHoleMachinedAtCorner.JPGTT1_7Jan2013_BasePlateAndRiserHoleMismatch.JPG 
  7879   Mon Jan 7 19:23:19 2013 ranaUpdateElectronicsJamie's 1811 PS from 1998   SOLA-1021-1026.pdfjamie98.jpg 
  7880   Tue Jan 8 14:01:21 2013 RijuUpdate Photodiode transimpedance Here I upload the plots corresponding
to my last day's measurements.
 
 TFreflpd.pdfREFL_z.pdfdarknoiseVreflpd.pdfdarknoiseAreflpd.pdf 
  7881   Tue Jan 8 14:07:04 2013 RijuUpdateElectronicsPhotodiode transimpedance

    

       
            
  
  7882   Tue Jan 8 15:28:41 2013 RijuUpdateElectronicsPhotodiode transimpedance

    

       
            
 analyzernoiseV.pdf 
  7883   Tue Jan 8 17:54:34 2013 JenneUpdateAlignmentRisers to bring TTs to correct beam height are in use 
 [Jenne, EricQ, Nic, MattA]
* TT1 is in place, aligned so beam
  
  7884   Tue Jan 8 18:10:41 2013 JenneUpdateSUSPRM, SRM, BS oplevs offI don't know why (I'm just leaving the
lab right now....) but BS, PRM, SRM all have
no light on their oplev PDs. I have turned
  
  7885   Wed Jan 9 13:34:34 2013 KojiSummaryGeneralThe projector lamp ended its life?[Koji, Manasa]
- A new projector lamp installed.
- The old lamp lasted 8751 "equivalent
  
  7886   Wed Jan 9 18:59:01 2013 JenneUpdateAlignmentTT2 installed, PRM oplev layout changed[Jenne, Manasa]
PZT2 was removed from the BS table,
and packed away in a foil-lined plastic box.
  
  7887   Wed Jan 9 19:32:24 2013 RijuUpdate Photodiode transimpedanceSummary:
Today I have tested the MC transmission-end
RF photodiode PDA255 for transimpedance and
 PDA255.pdfPDA255_z.pdfdarknoiseVpda255.pdfdarknoiseApda255.pdfdarknoise_comparison.pdf 
  7888   Thu Jan 10 12:22:36 2013 JenneUpdateAlignmentTT matrix is funny


   
        
            
  
  7889   Thu Jan 10 12:41:06 2013 ManasaConfiguration40m UpgradingEndtable upgrade for auxiliary green laser : wiki page 
I have created a wiki page linked here with
  
  7890   Thu Jan 10 15:30:33 2013 JenneUpdateAlignmentTT2 pins swapped, ITMX door open 
[Bob, Manasa, Jenne]
We opened the ITMX heavy door. 
  
  7891   Fri Jan 11 11:07:04 2013 ManasaUpdateGeneralIFO status update - PMC problemsI came in this morning to see that the
PMC was down. The PZT voltage had drifted
to below 50V. I adjusted the FSS slow controls
  
  7892   Fri Jan 11 16:13:47 2013 JenneUpdateGeneralIFO status update - PMC fixed


   
        
            
  
  7893   Fri Jan 11 17:32:10 2013 ManasaUpdateAlignmentTT2 connections 
 Manasa, Jenne
We started off to try and get TT2
  
  7894   Fri Jan 11 19:12:20 2013 KojiUpdateAlignmentTT2 connectionsWas the connection   
  7895   Mon Jan 14 09:08:37 2013 SteveUpdatePSLPMC is only ok short term 
 The PMC PZT voltage slider
seemed sticky.  First it would not do
 pmc8d.png 
  7896   Mon Jan 14 10:12:09 2013 JenneUpdateAlignmentTT2 connections


   
        
            
  
  7897   Mon Jan 14 12:08:39 2013 jamieUpdateAlignmentTT2 connections

    

       
            
  
  7898   Mon Jan 14 15:15:04 2013 JenneUpdate TT 
[Manasa, Jenne]
First plug in only one of the quadrupus
 TT2_stuck_unstuck_14Jan2013.png 
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