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  40m Log, Page 146 of 344  Not logged in ELOG logo
ID Datedown Author Type Category Subject Text Attachments
  9980   Wed May 21 09:35:33 2014 SteveUpdateSUS razor beam dumps ETMX_ISCT

    

       
            
 9rbdETMY.jpg 
  9979   Wed May 21 05:05:39 2014 JenneUpdateLSCREFL 165 vs 33 investigations[Rana, Jenne]
We spent some time tonight looking
at locking the PRMI with REFL165 vs. REFL33,
  
  9978   Wed May 21 00:18:40 2014 JenneUpdateLSCPRMI locked with REFL33 vs. REFL165Since Q has found that REFL165 will be
better for holding the PRMI while we reduce
the CARM offset, I had a look at locking
 PRMI_outofloop_20May2014.pdf 
  9977   Tue May 20 22:42:28 2014 ericqUpdateLSC3f Stability Here's the angles of MICH and PRCL
from the my earlier plot by themselves; this
shows that the individual demod angles in
 PRCangles.pdf 
  9976   Tue May 20 16:48:52 2014 ericqUpdateLSC3f StabilitySo, I really should have done this as soon
as Manasa
measured the arm lengths... I've
 3fs.pdfCARMsweepPrcFields.pdf 
  9975   Tue May 20 15:54:39 2014 ranaSummarySUSETMX oplev qpd board This QPD circuit (D980325-C1 )
uses the nice OP497 Quad FET opamp as the
transimpedance amplifier. It has a low enough
  
  9974   Tue May 20 11:48:22 2014 SteveUpdateSUSbeam dumps added to ETMX_ISCTAnodized aluminum dumps replaced by 6 razor
beam dumps.
Two more razor beam dumps added this
 razorbeamdumps.jpgrazorbeamdumpss.jpg 
  9973   Tue May 20 09:12:25 2014 SteveSummarySUSETMX oplev qpd board

    

       
            
 ETMXOLQPD121.jpgETMXOLQPDface121.jpgETMXolSUM.png 
  9972   Tue May 20 02:12:35 2014 JenneUpdateLSCALS X noise investigation[Rana, Jenne]
We
have looked at a few things that do and don't
 ALS_outofloop_19May2013.pdfXbeatSaturate.png 
  9971   Mon May 19 22:44:21 2014 denUpdatePEMxend sei isolation kit is set

    

       
            
  
  9970   Mon May 19 09:19:44 2014 SteveUpdateLSChappy IFO15 hours  whenthinksareworking.png 
  9969   Sun May 18 17:57:54 2014 ranaUpdateLSCETMX transients due to unseated bias cable The daytime crew had noticed that
there were some ETMX angular shifts happening
without any control or intention.
 ETMXbiasCableSeated.pdf 
  9968   Sun May 18 14:36:04 2014 denUpdateLSCoffsets in 3f and drmi stable lock on 1fEric, Den
We noticed that PRMI RIN is high
when the cavity is locked on RELF33 I&Q
 prmi_rin.pdfdrmi_power.pngsrc_ol.pdf 
  9967   Sat May 17 14:48:06 2014 denUpdatePEMyend sei isolation kit is setYend seismometer isolation kit (elog
8461) hosts Guralp seismometer. I made
a cable for inside connection, assembled
 IMG_1405.JPGIMG_1406.JPG 
  9966   Fri May 16 20:55:18 2014 JamieFrogsloreun-full-screening Ubuntu windows with F11Last week Rana and I struggled to figure
out how to un-full-screen windows on the
Ubuntu workstations that appeared to be stuck
  
  9965   Fri May 16 16:08:12 2014 steveUpdateLSCIsolating base plates Electronic components should be ISOLATED
as they are installed on the optical tables.
This is essential to avoid ground
 ISObaseplates.jpg 
  9964   Fri May 16 11:22:23 2014 SteveUpdateLSCX Arm ALS Noise coming in and out

    

       
            
  
  9963   Fri May 16 10:54:42 2014 ericqUpdateLSCX Arm ALS Noise coming in and outDen and I spent some time with the interferometer
last night with hopes of bringing in the
AO path, but were stymied by the (re)occurrence
  
  9962   Fri May 16 10:48:32 2014 SteveUpdateLSCY arm T- qpd is getting light guard extension tubeThe qpd was removed from the east end table
and threaded adaptor ring epoxied on it's
shell.
 TRYepox.jpg 
  9961   Fri May 16 09:46:05 2014 SteveUpdatePSLpointing monitoring

    

       
            
  
  9960   Fri May 16 00:25:53 2014 ranaUpdatePSLPMC realign Tonight I noticed that the drop in
PMC transmission was ~1V, more than the usual
of ~0.5V from the daily drift.
  
  9959   Thu May 15 16:46:35 2014 ericqUpdateLSCPossible Path to AO path It's taken a lot of trial and error,
but I've found a path through MATLAB loops
that seems like it may be stable
 AOtransitionSteps.pdfAOtransitionBodes.pdfAOCarmLoop.zip 
  9958   Thu May 15 15:10:02 2014 SteveUpdatePEMseismic activities Our only seismometer is at the east end
now.
Atm1, Ditch Day morning puzzle. The
 DichDay.pngDitchday8am.jpgAztecsGone.jpg 
  9957   Thu May 15 02:52:51 2014 JenneUpdateLSCStarted engaging the AO path, not getting all the way yet 
 In addition to a transparent
legend, we need the corresponding CM crossover
  
  9956   Thu May 15 02:32:01 2014 JenneUpdateLSCStarted engaging the AO path, not getting all the way yetI tried many times this evening to engage
the AO path, with limited success.
Q's new scripts worked really well,
 TFSR785_15-05-2014_011008.pdf 
  9955   Thu May 15 01:42:07 2014 ranaUpdateCDS/frames space cleared up, daqd stabilized Script seems to be working now:
nodus:~>df -h | grep
frames
  
  9954   Wed May 14 17:36:32 2014 ericqUpdateCDSNew netgpib scripts for SR785 I have redone the SPSR785 (spectrum measurement)   
  9953   Wed May 14 14:39:31 2014 JenneUpdateSUSNew buttons on IFO_ALIGN screenIt's starting to get a little crowded,
but I modified the IFO_ALIGN screen to have
new buttons to show the aligned / misaligned
 Screenshot-Untitled_Window.png 
  9952   Wed May 14 10:04:06 2014 SteveSummarySUS oplev laser and temperature ETMX oplev qpd gain has to be increased.
 
 TempRules.png 
  9951   Wed May 14 02:37:58 2014 JenneUpdateLSCNo big locking newsTonight was mostly cleaning up some scripts,
including the re-writing the restore and
align scripts for the optics. 
  
  9950   Tue May 13 22:55:57 2014 JenneSummarySUSETMX oplev: cleanupI believe that the Xend aux laser was turned
off earlier today, for Steve's work swapping
out the oplev.  When I went down there,
  
  9949   Tue May 13 17:45:21 2014 ranaUpdateCDS/frames space cleared up, daqd stabilized 
 Late last night we were getting
some problems with DAQD again. Turned out
  
  9948   Tue May 13 17:31:32 2014 JenneSummarySUSETMX oplev laser replaced: New oplev gains setI took loop measurements of ETMX pit and
yaw, and set the upper UGF to be ~6Hz for
both.  This required a pitch gain of
 OLerr_13May2014.pdfOLfb_13May2014.pdf 
  9947   Tue May 13 17:03:05 2014 SteveSummarySUSETMX oplev laser replaced

    

       
            
  
  9946   Tue May 13 13:27:58 2014 SteveSummarySUSOptical Lever Servos setting table

    

       
            
 OLsums.png 
  9945   Tue May 13 03:30:10 2014 JenneUpdateLSCLocking activities - no progress[Jenne, Rana, EricQ]
We tried a few times to engage
the AO path while holding CARM on sqrtTrans
 ALS_outofloop.pdf 
  9944   Tue May 13 00:46:58 2014 ranaHowToPSLPMC relockingThe PMC runs out of range sometimes due
to the daily temperature swing. The voltage
swings up after sunset and then starts to
  
  9943   Mon May 12 22:52:59 2014 JenneSummarySUSOptical Lever Filters are all differentWe need to go back and have a look at all
of our optical lever control filters, and
make sure they make sense. 
 OpLevFilters.pdf 
  9942   Mon May 12 22:42:19 2014 ranaSummarySUSOptical Lever QPD Sum trends: they're almost all too weakFor some reason or another, I decided that
we should see if the optical lever servos
were injecting too much noise into the test
 OL-FB.pngarms_140512.pdf 
  9941   Mon May 12 14:42:25 2014 steveUpdateendtable upgradeoptical table enclosure wall proposal and table at ETMY

    

       
            
 Hilite70.jpgETMY-ISCT.jpgRoscoThermashield.pdf 
  9940   Mon May 12 10:42:01 2014 ranaUpdateSUSsome Arm maintenanceI ran the ASS/ADS for the arms because
the X-arm was way out. There was also some
problem with its locking due to bad ramps
  
  9939   Fri May 9 21:18:51 2014 KojiUpdateGreen LockingReverted X green light power It is actually very tricky to measure the
green power at the output of the doubling
crystal as the IR often leaks into the measurement.
  
  9938   Fri May 9 14:01:24 2014 JenneUpdateLSCCM board boost turn-on checkoutNote:  I thought I was editing elog
9935, but somehow this became a whole
 17x 
  9937   Fri May 9 11:23:11 2014 steveUpdateGreen Lockingdecreased X green light power Green light power decreased from 3 mW to
1 mW at the ETMX-ISCT shutter. More later.
  
  9936   Fri May 9 04:51:13 2014 ericqSummaryLSCREFL_DC handoff didn't work last night

    

       
            
  
  9935   Fri May 9 04:09:39 2014 JenneUpdateLSCCM board boost turn-on checkoutAs part of checking the common mode board
before we get too carried away with using
it, I looked at the time series of the
  
  9934   Fri May 9 01:36:28 2014 ranaSummarySUSOptical Lever QPD Sum trends: they're almost all too weak We want there to be ~16000 cts of
signal per quadrant on the optical levers.
I think that most of the QPDs have been modified
 OLtrend.png 
  9933   Thu May 8 17:25:17 2014 steveUpdateLSCTRY 60Hz noise hunt I
worked at the ETMY-ISCT this morning and
  
  9932   Thu May 8 17:00:56 2014 rana, QSummaryLSCREFL_DC handoff didn't work last nightLast
night after checking cabling and turning
on ISS, we tried several times to handoff
  
  9931   Thu May 8 15:55:43 2014 jamieUpdateCDSpython issues

    

       
            
  
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