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ID Date Author Type Categoryup Subject Text Attachments
  6608   Sat May 5 20:42:59 2012 DenUpdatePSLPMC[Koji, Den]
Koji was right that I misaligned
everything during the alignment work. I assumed
  
  6753   Tue Jun 5 09:44:14 2012 steveUpdatePSLref cavity ion pump must be pumped

    

       
            
  
  6839   Wed Jun 20 18:00:10 2012 ranaSummaryPSLsummaries Nice PSL summaries from LHO:
https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=3187
  
  6978   Mon Jul 16 16:41:49 2012 JenneUpdatePSLPMC locked in funny place - PSL laser temp changedThe PMC was unlocked earlier this morning,
for ~20min, presumably from the rocks next
door.  I relocked it.
  
  6995   Fri Jul 20 12:12:25 2012 ranaUpdatePSLPMC problems examinedJenne, Den, Rana
The PMC transmission has been varying
a lot and the MC seems unstable. Superstitious
 Untitled.png 
  6998   Sat Jul 21 14:05:21 2012 DenUpdatePSLPMC problems examined

    

       
            
 fss_slowm.png 
  7006   Mon Jul 23 18:38:58 2012 JenneUpdatePSLPSL channels added to IOO modelI added a subblock to the IOO model, and
gave it a top_names of PSL, so the channels
show up as C1:PSL-......
  
  7010   Mon Jul 23 19:13:12 2012 JenneUpdatePSLPSL channels added to IOO model

    

       
            
  
  7047   Mon Jul 30 09:00:18 2012 steveUpdatePSLPMC is still not fixedThe PMC was locking right the way, but
it's transmission would not go up. 
Finally I get it back up by moving the "sticky"
 pmcA.pngpmcB.png 
  7048   Mon Jul 30 10:05:29 2012 JenneUpdatePSLPMC is still not fixed

    

       
            
  
  7265   Thu Aug 23 22:44:32 2012 KojiUpdatePSLFSS Slow DC servo is turned off (not temporary)[Koji Rana]
The FSS Slow DC servo was turned
off.
  
  7273   Fri Aug 24 20:48:10 2012 KojiUpdatePSLPMC alignedas usual.   
  7292   Tue Aug 28 00:23:54 2012 JenneUpdatePSLPMC alignment going badPMC transmission started going down this
afternoon, around 3pm-ish.  Right now
it's 0.775, which is very, very low. 
 PMC_transmission_GoingDown_27Aug2012.png 
  7294   Tue Aug 28 11:28:31 2012 ericqUpdatePSLPMC alignment going bad

    

       
            
  
  7295   Tue Aug 28 16:27:22 2012 ericqUpdatePSLPBS and Half Wave plates introduced[Jenne, Eric]
We installed a Half Wave Plate ->
Polarized Beam Splitter -> Half Wave Plate
  
  7297   Tue Aug 28 17:16:54 2012 ericqUpdatePSLPower reduced!We have now reduced the power being
input to the MC from 1.25W to 10mW, and changed
out the MC refl BS for a mirror. 
  
  7298   Tue Aug 28 17:43:04 2012 JenneUpdatePSLPower reduced!

    

       
            
  
  7299   Tue Aug 28 17:51:39 2012 JenneUpdatePSLPBS and Half Wave plates introduced

    

       
            
  
  7308   Wed Aug 29 17:02:41 2012 ericqUpdatePSLPower reduced!

    

       
            
  
  7310   Wed Aug 29 17:35:34 2012 KojiUpdatePSLPower reduced!The biggest reason why we could not lock
the MC was that the beam was not properly hitting
  
  7337   Tue Sep 4 13:50:26 2012 ericqUpdatePSLPMC Realigned, power adjusted I adjusted the PMC alignment this
morning, brought the transmission up to 0.83V.
After the lunch meeting, we found
  
  7382   Fri Sep 14 00:33:31 2012 ranaUpdatePSLPMC alignment - mystery in reflected powerThe PMC reflection made it seem that the
beam going into it was misaligned. I went
to the table and aligned the input beam to
 pmcr.jpge.pnga.png 
  7403   Tue Sep 18 20:32:42 2012 ManasaConfigurationPSLAOM installation {Jan, Manasa}
We tried towards calibrating the
RF driver of the AOM. We decided to use the
  
  7409   Wed Sep 19 11:39:37 2012 ManasaConfigurationPSLAOM installation

    

       
            
 ALC_25.png 
  7411   Wed Sep 19 15:41:27 2012 ManasaConfigurationPSLAOM installation 
 AOM driver has been removed
from the PSL table for testing. However the
  
  7414   Wed Sep 19 23:17:25 2012 ranaConfigurationPSLAOM installationMannasa and Unni and I looked at the
RF driver for the AOM. It was fine.
With the ALC input left unconnected,
  
  7416   Thu Sep 20 01:29:04 2012 ManasaConfigurationPSLAOM installation

    

       
            
 TEK00000.PNG 
  7425   Fri Sep 21 12:12:56 2012 ManasaConfigurationPSLAOM installation    {Jan, Manasa}
We installed the AOM driver back
on the PSL table this morning. To calibrate
 PSL.png 
  7464   Tue Oct 2 16:15:22 2012 ManasaConfigurationPSLAOM installation

    

       
            
 psl_aom.png 
  7471   Wed Oct 3 16:52:16 2012 ManasaConfigurationPSLAOM installation{Jan, Manasa}
We set start to check the performance
of the AOM on the PSL table. The AOM driver
  
  7474   Wed Oct 3 23:36:54 2012 KojiConfigurationPSLAOM installationAfter the AOM work the beam wasn't well
aligned to the PMC. The PMC REFL CCD shows
large misalignment in yaw.
 PMCTRANS.png 
  7479   Thu Oct 4 17:54:59 2012 ManasaConfigurationPSLAOM installation

    

       
            
  
  7480   Thu Oct 4 18:48:04 2012 janoschConfigurationPSLAOM installation
  
  7481   Thu Oct 4 20:57:43 2012 ManasaConfigurationPSLAOM installation

    

       
            
  
  7482   Thu Oct 4 22:16:28 2012 KojiConfigurationPSLAOM installationDo
more investigation to understand what is
causing the power reduction.
  
  7483   Thu Oct 4 22:16:40 2012 DenUpdatePSLPMC is lockedPZT monitor is not lying to us, I've measured
it with a voltmeter. But PMC SERVO is still
interesting. If I break the loop after PMCERR
  
  7492   Fri Oct 5 14:53:29 2012 JenneUpdatePSLTTFSS board not fully seated![Den, Jenne]
Den noticed that the -15V LED on
the TTFSS board was not illuminated. 
  
  7494   Fri Oct 5 18:08:17 2012 ManasaConfigurationPSLAOM installation

    

       
            
  
  7501   Mon Oct 8 11:15:53 2012 JenneUpdatePSLPMC and FSS had a weird weekendSomething bizarre-o was going on with the
PMC and FSS over the weekend.  On the
striptool, PMC's PZT looks like it was doing
 PMC_sawtooth_FSSweird_8Oct2012_10dayTrend.pngPMC_sawtooth_FSSweird_8Oct2012_1dayTrend.pngPMC_sawtooth_FSSweird_8Oct2012_1dayTrend.png 
  7590   Mon Oct 22 21:20:36 2012 JenneUpdatePSLBeam attenuation optics in place[Jenne, Raji (before dinner)]
We put the beam attenuation optics
in place.  Before putting any optics
  
  7766   Fri Nov 30 11:38:35 2012 SteveUpdatePSLfoil removed from enclosureAluminum foil replaced by sheet metal on
Enclosure and AP table.
 IMG_1822.JPG 
  7778   Mon Dec 3 17:04:12 2012 AyakaUpdatePSLPMC calibration for MC_F calibrationIn order to calibrate MC_F signal, I need
to know the calibration value from thorlab's
PZT driver to laser frequency.
 DSC_4955.JPGsweep_PZTdriver.pngPMC_PZT_FSR.pdftrans_fit.pngPMC-PZTcal_121203.zip 
  7779   Tue Dec 4 01:43:37 2012 ranaUpdatePSLPMC calibration for MC_F calibration  If you can't find the PMC sidebands
in the transmission, its because the SNR
is too small.
  
  7782   Tue Dec 4 11:30:36 2012 ZachUpdatePSLPMC calibration for MC_F calibrationIn order to have less unknown, you can
calibrate the PMC PZT separately. Lock the
PMC and take a transfer function from either
  
  7810   Tue Dec 11 11:40:07 2012 Manasa, AyakaUpdatePSLPMC drift[Manasa, Ayaka]
I found that MC got unstable this
morning. This is caused by the drift of PMC.
 PMCdrift121211.pdf 
  7811   Tue Dec 11 19:51:36 2012 KojiUpdatePSLPMC gain was too low / EPICS alerting value for PMC updated[Ayaka, Koji]
Ayaka pointed out that the PMC has
too low unity gain frequency. We checked
  
  7823   Thu Dec 13 17:24:53 2012 AyakaUpdatePSLPMC calibration for MC_F calibration I calibrated MC_F signal into Hz/rtHz
unit using the transfer function from
MC_F to PMC feedback signal.
 6x 
  7836   Fri Dec 14 17:12:19 2012 Evan HallUpdatePSLPMC yaw tune-up (from Wednesday night)Wednesday night, there was ~0.4 V on the
PMC transmission PD. I adjusted the steering
mirrors into the PMC and got the transmission
  
  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 
  7983   Fri Feb 1 12:34:55 2013 JenneUpdatePSLToo much power injected into vacuumI noticed (while relocking the MC after
Jamie and I zeroed the LSC offsets) that
the MC refl power was 4.8 V.  Usually
  
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