40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 152 of 344  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  5646   Mon Oct 10 18:53:04 2011 KatrinUpdateGreen LockingMirrors whose angle of incidence is not 45The angle of incidence of light is for
some mirrors on the YARM end table different
from 45° even though the mirrors are
  
  5647   Tue Oct 11 00:59:55 2011 SureshUpdateIOOPreliminary locking of WFS loops[Kiwamu, Koji, Suresh]
After correcting several errors in
the WFS loops, we turned them on today and
 6x 
  5648   Tue Oct 11 03:35:16 2011 kiwamuUpdateLSCBS actuator reponse at low frequency : measuredThe response
of the BS actuator in a low frequency regime
 BSactuator.png 
  5649   Tue Oct 11 15:14:50 2011 ranaUpdateLSCBS actuator reponse at low frequency : measured

    

       
            
  
  5652   Tue Oct 11 19:11:25 2011 kiwamuUpdateLSCRe: BS actuator reponse at low frequency : measuredI think
the precision due to the loop gain uncertainty
  
  5653   Tue Oct 11 21:23:51 2011 JenneUpdateLSCArm absl lengths

    

       
            
  
  5654   Wed Oct 12 00:35:42 2011 kiwamuUpdateLSCTRY path realignedThe
TRY (TRansmitted light from Y arm ) path
was a bit realigned because there had been
  
  5655   Wed Oct 12 08:43:30 2011 steveUpdateSUSITMX oplev improved a bit Atm2 is before optical path adjustment.
The idea was to remove possible clipping
in vacuum.
 ITMXoplev.pngITMXoplevservo_ON.png 
  5656   Wed Oct 12 17:53:01 2011 kiwamuUpdateLSCBS actuator response : fitting done and histroy of delaysAn
update on calibration of the BS actuator
: A fitting has been done.
 bode_BSactuator.png 
  5657   Wed Oct 12 18:54:02 2011 KatrinUpdateGreen Locking60 Hz oscillation due to broken BNC cableThere was a 60 Hz and 120 Hz oscillation
on the green PDH photo diode output. After
a long search, I could identify that
  
  5658   Wed Oct 12 19:58:32 2011 KatrinUpdateGreen LockingPower splitter is unbalancedThe mini circuit power splitter ZFRSC-42S+
used at the YARM has no balanced output as
it should have according to the data sheet.
  
  5659   Thu Oct 13 03:22:53 2011 kiwamuUpdateLSCmeasurement of sensing matrix : just began- status update on LSC activity :
The
measurement of the LSC sensing matrix has
  
  5660   Thu Oct 13 14:23:09 2011 steveUpdateSUSITMX oplev with 3 mm beam on qpd I replaced the JDSU-Uniphase 1125P
by 1103P He/Ne laser. This new laser had
2.8 mW output yesterday. It degraded to 0.5
 ITMXoplev1103p#2.pngITMXoplev.png 
  5661   Thu Oct 13 20:25:32 2011 KatrinUpdateGreen LockingLPF transfer function YARMIt is a 4th order filter with
cut of frequency of 120 kHz.
 
 designLPF.pngLC_LPF.TIF 
  5663   Thu Oct 13 21:44:48 2011 MirkoUpdateCDSSeismic BLRMS channels, new RMS calculation[Rana, Koji, Mirko]

We looked into the CDS RMS block c-code
 New_RMS_vs_old_RMS.pngOriginal_RMS_LP_slower_than_0.1Hz.png 
  5664   Thu Oct 13 23:58:38 2011 KojiUpdateLSCfixing REFL165 I already have reported in
this entry that REFL165 shows too high
DC output which does not depend on the light
 PA131612.jpgPA131618.jpg 
  5665   Fri Oct 14 04:35:45 2011 kiwamuUpdateLSClocking tonightThe
lock of DRMI wasn't stable enough to measure
the sensing matrix. Failed. 
 Screen_shot_2011-10-14_at_4.24.01.png 
  5666   Fri Oct 14 16:20:11 2011 ZachUpdateSUSC1:SUS-ETMX_SPDMon fixedI offered to help Kiwamu with some of the
40m work. The first task was to figure out
why the ETMX side OSEM monitor was so low,
 board_works.pngrut_roh_raggie.pngScreen_shot_2011-10-14_at_4.09.45_PM.png 
  5667   Fri Oct 14 18:38:41 2011 kiwamuUpdateSUSC1:SUS-ETMX_SPDMon fixed

    

       
            
  
  5668   Sat Oct 15 04:53:41 2011 SureshUpdateIOOMC WFS Output Matrix determinationAfter we had a
rough idea of what the output matrix looks
like (see this elog),
 WFS1P_RespTo_MC1andMC2.pdfWFS1_IQphase20111015_1.pdfWFS2_IQphase20111015_1.pdfWFS1_IQphase20111015_2.pdfWFS2_IQphase20111015_2.pdf 
  5669   Sat Oct 15 10:58:32 2011 ranaUpdateIOOMC WFS Output Matrix determinationIn order to save time and sanity, you
should not measure the pitch ->yaw and
yaw-> pitch. It makes things too complicated
  
  5670   Sat Oct 15 16:01:26 2011 kiwamuUpdateIOOabout LOCKIN module

    

       
            
  
  5671   Sat Oct 15 16:42:08 2011 KojiUpdateLSCTesting REFL165  Test results of new REFL165 (the
first attachment)
- The resonant freq 166.2MHz, 
 REFL165_test_111014_KA.pdfREFL165_transimpedance2.pdf 
  5672   Sat Oct 15 17:06:20 2011 KojiUpdateLSCInstallation REFL165 REFL165 was installed on the AP table last
night.
Meanwhile I found the DC power level
  
  5673   Sun Oct 16 02:30:00 2011 ranaUpdateElectronicsTesting REFL165 Unless the bias feedback circuit has been
tuned for the 1 mm diode, its possible that
you are seeing some C(V) effects. Its easy
  
  5674   Sun Oct 16 05:35:18 2011 ranaUpdateComputer Scripts / ProgramsFailing to set SUS summary screen values

    

       
            
  
  5675   Mon Oct 17 07:57:24 2011 steveUpdateSUSETMX sus damping restored    
  5676   Mon Oct 17 10:43:14 2011 MirkoUpdateCDSCommited changes to c1rfmI want to make changes to c1rfm. Found
uncommited changes to it from Sept 27. Since
we recompiled it since then it should be
  
  5677   Mon Oct 17 11:06:31 2011 MirkoUpdateCDSPiping data from c1lsc to c1oafChanged, recompiled, installed and restarted
c1rfm and c1oaf to get the MC1-3 Pitch and
Yaw data into the c1oaf model.
  
  5678   Mon Oct 17 11:40:44 2011 KojiUpdateLSCREFL165 removed from the tableREFL165 removed from the table for the
C(V) test
  
  5679   Mon Oct 17 14:26:22 2011 MirkoUpdateCDSSeismic BLRMS channels, new RMS calculation


   
        
            
  
  5680   Mon Oct 17 17:07:30 2011 steveUpdateSUSETMX oplev returning beam od 3 mm ETMX oplev had 6 mm diameter beam
on the qpd.  I relayed the beam path
with 2 lenses  to get back  3 mm
 ETMX-oplev.jpg 
  5681   Mon Oct 17 22:20:42 2011 KojiUpdateLSCREFL165 removed from the table

    

       
            
  
  5682   Mon Oct 17 23:28:32 2011 ranaUpdateElectronicsStochMonTo get to the bottom of the RFAM mystery,
we've got to resurrect the StochMon to trend
the RFAM after the IMC.
  
  5683   Mon Oct 17 23:56:34 2011 SureshUpdateIOOMC WFS Integrators switched on and WFS_MASTER screen updated[Rana, Suresh]
     To see if
the loops will stay locked when the Integrators
 WFS_MASTER_screenshot_20111017.png 
  5684   Tue Oct 18 04:04:27 2011 kiwamuUpdateLSCmeasurement of sensing matrix : touchy SRMI made
some attempts to measure the sensing matrix
  
  5685   Tue Oct 18 10:04:41 2011 KojiUpdateLSCREFL165 removed from the tableThe original REFL165 had ~50MHz/A dependence
on the DC photocurrent.
The resistr R21, which was 2670 Ohm
 REFL165_original.pdfREFL165_new.pdfREFL165_schematic_111017_KA.pdf 
  5687   Tue Oct 18 20:50:19 2011 SureshUpdateIOOC1IOO and WFS associated screensIn keeping with the current protocol, 
I have started to move all the user-built
medm screens associated with C1IOO into the
  
  5690   Wed Oct 19 04:23:58 2011 kiwamuUpdateSUSSRM free swinging testThe following optics were kicked:
SRM
Wed Oct 19 04:22:53 PDT 2011
  
  5691   Wed Oct 19 05:15:44 2011 kiwamuUpdateSUStaking care of SRMI
made some efforts to fix the situation of
SRM but it is still bad.
 f2pSRM.png 
  5692   Wed Oct 19 08:34:16 2011 steveUpdateSUSSRM sus damping restoredSorry Kiwamu, I realized too late that
you were freeswigging. Hopefully 4 hrs was
enough.
 SRM.png 
  5693   Wed Oct 19 09:44:10 2011 steveUpdateSUSETMX oplev power spectrum


   
        
            
 ETMXoplev2lens.png 
  5694   Wed Oct 19 10:49:35 2011 kiwamuUpdateSUSSRM oscillation removed


   
        
            
 SRMoplevKWMtune.png 
  5695   Wed Oct 19 12:06:26 2011 MirkoUpdateCDSIncluded the MC servo channel in CDS[Jamie, Mirko]
Included the 'Servo' output from
the D040180 in c1ioo, which I hoped would
 MC_F_versus_MC_SERVO.pngCoh_MC_F_MC_SERVO.png 
  5696   Wed Oct 19 12:25:58 2011 SureshUpdate40m UpgradingActive Tiptilts from LLO moved to clean shelf along X armI have moved the active tip tilts that
we brought over from LLO to the Clean Bureau
along the X arm (closest to the ETMX). There
  
  5697   Wed Oct 19 13:45:11 2011 SureshUpdate40m UpgradingActive Tiptilts from LLO moved to clean shelf along X armI have moved the active tip tilts that
we brought over from LLO to the Clean Bureau
along the X arm (closest to the ETMX). There
  
  5698   Wed Oct 19 14:03:41 2011 kiwamuUpdateGeneralvent prep : dichroic mirrorsStatus update on dichroic mirror:
 I got the specification sheet
of an aLIGO 2" dichroic mirror from
  
  5699   Wed Oct 19 15:46:49 2011 kiwamuUpdateSUStaking care of SRM


   
        
            
 SRM.png 
  5700   Wed Oct 19 15:48:20 2011 MirkoUpdatePEMMoved the STS1 from x-arm end to vortex[Jenne, Mirko]

We moved our one STS1 from the x-arm
 19102011061.jpg 
  5701   Wed Oct 19 16:28:35 2011 steveUpdateGreen LockingETMY mechanical shutter is working


   
        
            
  
ELOG V3.1.3-