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ID Date Author Type Categoryup Subject Text Attachments
  3921   Mon Nov 15 14:36:37 2010 KojiUpdatePSLC1PSL rebooted? Has C1PSL rebooted? Has burtrestore been
forgotten? Even without elog?
We found some settings are wrong
  
  3922   Mon Nov 15 14:42:01 2010 AidanUpdatePSLC1PSL rebooted? Yeah. Joe and I rebooted c1psl a couple
of times this morning. I didn't realize the
burtrestore wasn't automatic.
  
  3924   Mon Nov 15 15:02:00 2010 KojiSummaryPSLpower measurements around the PMC[Valera Yuta Kiwamu Koji]
Kiwamu burtrestored c1psl.  We measured
the power levels around the PMC.
  
  3951   Thu Nov 18 23:45:18 2010 ranaConfigurationPSLPMC Refl CamValera
and Haixing and I installed a PMC REFL camera
 mc2_simulink.png 
  4128   Sun Jan 9 15:50:55 2011 ranaHowToPSLSetting the PMC gain   Untitled.png 
  4137   Tue Jan 11 17:08:43 2011 SureshConfigurationPSLreplaced the pzt-steering mirror on PSL[Rana,
Jenne, Suresh]
Yesterday,
  
  4223   Fri Jan 28 15:50:44 2011 JenneConfigurationPSLThe PSL has a name!Back in the days when we were talking about
getting a new 2W PSL, I was given naming
rights by Rana for this new laser. 
 EdwinTheLaser.jpg 
  4258   Mon Feb 7 21:23:11 2011 ranaConfigurationPSLPSL FSS Temperature Sensor Interface box removedI noticed that the RMTEMP channel was spiking
myteriously when Kiwamu opened the PSL door.
We found out that the LEMO connectors would
 P2070555-1.JPG 
  4301   Tue Feb 15 11:57:06 2011 steve, valeraConfigurationPSLPMC swap We swapped the PMC s/n 2677 for s/n
lho006.
The table below summarizes the power
 P1070421.JPGP1070423.JPG 
  4350   Thu Feb 24 16:47:26 2011 steveConfigurationPSL shutter is back on the PSL outputUniblitz mechanical shutter was placed
into the beam path of the PSL output with
razor beam trap. The output power was 1.39W
 P1070441.JPG 
  4375   Thu Mar 3 20:30:03 2011 ranaSummaryPSLPMC Sweeps @ different input power levels to measure the FinesseIts been well
noted in the past that sweeping the PMC
at high power leads to a distortion of the
  
  4417   Mon Mar 21 13:26:25 2011 KojiUpdatePSLPMC Trans/RFPDDC PMC TRANS/REFL on MEDM showed red values
for long time.
TRANS (a.k.a C1:PSL-PSL_TRANSPD) was
  
  4429   Wed Mar 23 09:48:20 2011 steveUpdatePSLPSL enclosure: gets new window & laserSolid door, numbered 4 at south west corner
of PSL enclosure was replaced by laser protective
window.
 P1070471.JPG 
  4452   Mon Mar 28 21:12:14 2011 JenneUpdatePSLNew PMC Base Riser DesignI (think) I have finished the new PMC base
riser.  The eDrawing of it (so you can
view it on any computer) has been uploaded
 PMC_riser.eprt 
  4453   Mon Mar 28 22:56:14 2011 ranaUpdatePSLNew PMC Base Riser DesignIts going to need some kind of way to locate
the PMC on the top. In the previous design,
we had the 3 balls to decouple the body from
  
  4454   Mon Mar 28 23:51:54 2011 JenneUpdatePSLNew PMC Base Riser Design


   
        
            
  
  4496   Thu Apr 7 11:38:56 2011 steveUpdatePSLenclosure windows on the east side of the PSLThe PSL enclosure now have 4 windows on
each side. The bottom rail guides on the
east side will be replaced by  one 
 P1070538.JPG 
  4633   Thu May 5 10:19:22 2011 steveUpdatePSLPSL-FSS_RMTEMP is backValera and I installed the the temp sensor
and the interface box that Rana fixed. This
may help with diagnosing the PSL drift.
 P1070637.JPG 
  4635   Thu May 5 13:12:06 2011 JenneUpdatePSLTemperature drift, trying to shield PMC with foileeek.  I've been running around
all day, so this is an incomplete elog. 
I'll fill in more stuff in the next hour
 PSL_Temp_drift_5May2011.pngP5050092small.jpg 
  4641   Thu May 5 15:05:06 2011 steveUpdatePSLPSL-FSS_RMTEMP is not back

    
        
 rtnfxd.jpg 
  4648   Thu May 5 20:47:41 2011 KojiUpdatePSLPMC alignedThe PMC exhibited the reduction of the
transmission, so it was aligned.
The misalignment was not the angle
  
  4662   Sun May 8 22:59:40 2011 ranaUpdatePSLPSL reference cavity temperature box modificationsI looked at the PSL temperature box. It
started out as D980400-B-C. Then it was revised
by Peter King as per the LHO mods E020247.
  
  4663   Mon May 9 09:37:51 2011 valeraUpdatePSLPSL and MC trendsThe attached plot shows 7 day trends of
the MC and PMC power levels, PSL QPDs, and
temperature. The MC stayed locked for ~40
 pslmcdrift2.pdf 
  4666   Mon May 9 15:21:36 2011 josephbUpdatePSLFixed channel names for PSL QPDs, fixed saturation, changed signs[Valera,
Joe]
Software
  
  4672   Mon May 9 20:30:20 2011 ranaUpdatePSLPSL reference cavity temperature box modificationsI re-installed the box (@ ~8:15) after
reflowing some of the solder joints. I will
observe it over night and then remove the
 Untitled.png 
  4677   Tue May 10 10:06:23 2011 josephbUpdatePSLFixed channel names for PSL QPDs, fixed saturation, changed signsI added calculation entries to the /cvs/cds/caltech/target/c1iool0/c1ioo.db
file which are named C1:IOO-QPD_*_*, as the
channels were originally named.  These
  
  4678   Tue May 10 11:14:44 2011 steveUpdatePSLPSL-QPD_ANG qpd optimizedValera and I placed F 572.7 mm lens ~15
cm away  from the ang  qpd (in
the same mount with ND filter) so that two
 qpdangl.jpg 
  4681   Tue May 10 20:57:05 2011 ranaUpdatePSLPSL reference cavity temperature box modifications : after 24 hours still OK

    
        
 Untitled.png 
  4697   Thu May 12 00:59:45 2011 ryan, ranaUpdatePSLReturn of the PSL temperature boxThe PSL temperature box has returned to
service, with some circuit modifications.
The 1k resistors on all the temp. sensor
  
  4798   Thu Jun 9 10:38:30 2011 steveUpdatePSLPMC needs helpThe PMC is losing power.  pmcnothp.jpg 
  4799   Thu Jun 9 12:21:07 2011 kiwamuUpdatePSLRe : PMC needs helpNulling
the slow actuation offset fixed the issue.
 Untitled.png 
  4817   Tue Jun 14 16:38:31 2011 JamieUpdatePSLTweaked input pointing to PMCThe PMC trans power was a little low (0.77V
or so).  I tweaked up the input pointing
and now we're getting about 0.875V transmitted.
  
  4865   Thu Jun 23 10:17:49 2011 steveUpdatePSLAP table is open to PSL againAccess to the north side of the PSL table
is blocked by the    8" beam
guard. This opens the beam pathways between
 P1070911.JPGP1070910.JPG 
  4870   Thu Jun 23 22:39:34 2011 JenneUpdatePSLPMC found unlockedI found the PMC unlocked.  Koji noticed
that the FSS Slow Actuator Adjust was railed
at the positive end of the slider. 
  
  4880   Fri Jun 24 21:21:46 2011 SureshUpdatePSLPlaced labels on the zig-zag mirrors on PSL tableI put labels on the pair of beam steering
mirrors which are at the output end of the
PSL table.  I had changed one of these
  
  4980   Sun Jul 17 18:23:23 2011 JenneUpdatePSLFound the PMC unlockedIt was unlocked since ~4:30am.  No
idea why.  It's relocked so I can try
round N of measuring the PRC length.
 PMCunlocked_17July2011.png 
  4985   Mon Jul 18 21:06:32 2011 PSL Table GuardianOmnistructurePSLDon't leave the PSL table open, unattended!!!!!!!!!!!!11111I found the
PSL table left open, and unattended again. 
  
  5043   Wed Jul 27 10:10:12 2011 steveUpdatePSLlocking status 80 days: PMC is drifting  80dpmcMC.jpg 
  5057   Thu Jul 28 19:49:12 2011 SonaliUpdatePSLPMC trans beam aligned.Kiwamu and I aligned the PMC transmitted
beam the incident beam going to
PMC today.
  
  5064   Sat Jul 30 00:33:33 2011 KojiUpdatePSLABSL Laser crystal temp left largely excited & left unattended for more than 3hoursI
found that the ref cav trans CCD view was
blinking with 30-50 fringe amplitudes. This
  
  5065   Sat Jul 30 02:47:43 2011 ranaUpdatePSLABSL Laser crystal temp left largely excited & left unattended for more than 3hours Hmm. Should have only been +/- 1
GHz. Some setting got changed apparently...
This is a part of the RefCav temperature
  
  5069   Sat Jul 30 10:01:35 2011 JennyUpdatePSLPSL table work I've been working on the PSL table to put
together a setup so that I can measure the
reference cavity's response to a temperature
 modematchpic.pngmodematchinfo.pngLIGO_block_diagram.pngLIGO_block_diagram.pngmodematch_setup_pic.png 
  5071   Sat Jul 30 19:06:25 2011 ryan, ranaUpdatePSLReturn of the PSL temperature box


   
        
            
 rctempbox.png 
  5072   Sat Jul 30 20:41:50 2011 ranaUpdatePSLRefCav Stabilization back on   Untitled.png 
  5075   Sun Jul 31 00:37:57 2011 kiwamuUpdatePSLRe : PSL table work I think you made a simple mistake in your
diagram -- the mixer must be replaced by
  
  5096   Tue Aug 2 17:40:04 2011 JennyUpdatePSLReducing beam intensity incident on photodiodeI am using a PDA255 photodiode to measure
the power outputted by the NPRO beam on the
PSL table. (I'm going to then use a network
  
  5114   Thu Aug 4 00:04:52 2011 JennyUpdatePSLNetwork analyzer and PD set up to measure amplitude response of PZTToday I placed the PDA255 photodiode on
the PSL table to catch the small amount of
beam power reflected by the second polarizing
  
  5126   Fri Aug 5 18:29:35 2011 JennyUpdatePSLNetwork analyzer and PD set up to measure amplitude response of PZT

    

       
            
  
  5144   Mon Aug 8 20:23:14 2011 JennyUpdatePSLNetwork analyzer and PD set up to measure amplitude response of PZT

    

       
            
  
  5149   Tue Aug 9 02:34:26 2011 JennyUpdatePSLPZT transfer function measurementUsing a PDA255 on the PSL table, I measured
the amplitude response of the NPRO PZT, sweeping
from 10kHz to 5 MHz.
  
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