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ID Date Authorup Type Category Subject Text Attachments
  8092   Fri Feb 15 21:22:29 2013 yutaUpdateElectronicsAS55 replaced with POP55 PDI temporarily replaced AS55 PD with PD
labeled "POP55(POY55)".
I think POP55 is working because I
  
  8093   Sat Feb 16 17:27:26 2013 yutaUpdateSUSPRM coil balancedPRM coil gains and f2a filters are adjusted
for PRMI work.
It seems like 
 PRM_f2a.png 
  8094   Sat Feb 16 18:32:01 2013 yutaSummaryRF Systemphase tracker: OLTFI measured openloop transfer function of
the phase tracking loop for the first characterization
of phase tracker.
 BEATXFINEPHASE_OLTF.pngBEATYFINEPHASE_OLTF.pngphasetracker.png 
  8095   Sat Feb 16 19:23:17 2013 yutaUpdateLSCPR2 flipped PRMI lockedIt is my pleasure to announce that the
first lock of PR2 flipped PRMI was succeeded.
  
  8099   Mon Feb 18 18:28:01 2013 yutaBureaucracyAlignmentwe are going to pump downWe
will start preparing for pumping down. Main
goal for this is to demonstrate PRFPMI using
  
  8102   Tue Feb 19 00:21:09 2013 yutaUpdateElectronicsPOP path set up but AS55 is brokenHmm......  
I thought AS55 is broken because it
was not responding to the AS beam nor flashlight
  
  8103   Tue Feb 19 02:23:40 2013 yutaBureaucracyGeneralaction items for PRFPMIThese are things need to be done for demonstrating
PRFPMI using ALS.
All of these should be done before
  
  8105   Tue Feb 19 08:06:02 2013 yutaUpdateElectronicsPOP path set up but AS55 is brokenI didn't use LED flash light. We learned
from the past (elog
#7355). I checked that POP55 and REFL55/165/33/11
  
  8112   Tue Feb 19 19:55:52 2013 yutaUpdateIOOMC yaw input tuned[Jenne, Manasa, Yuta]

Since we levelled IMC stack, we had
 MCdecenter_19Feb2013.png 
  8114   Wed Feb 20 03:13:10 2013 yutaUpdateAlignmentclipping centering checklistI attached clipping/centering checklist
for the alignment.
Blue
 ClippingCenteringChecklist.pdf 
  8115   Wed Feb 20 10:13:41 2013 yutaUpdateAlignmentPRC flashing brighter than last weekAfter in-vac alignment work last night,
PRC is flashing brighter than PRMI alignment
last week.
  
  8119   Wed Feb 20 19:48:16 2013 yutaUpdateAlignmentBS table oplev re-arranged[Sendhil, Yuta]

After aligning IFO and putting the
 IFOALIGN_QPDs_OSEMs.png 
  8121   Wed Feb 20 20:15:29 2013 yutaUpdateAlignmentSRM oplev statusCurrently, SRM is misaligned in pitch so
that SRM reflected beam hits on the top edge
of SR3 (not on the mirror, but on the cage
  
  8122   Wed Feb 20 20:58:37 2013 yutaUpdateAlignmentclipping centering checklistBlue
ones are the ones we checked yesterday.
Green
 ClippingCenteringChecklist.pdf 
  8124   Wed Feb 20 21:56:08 2013 yutaUpdateAlignmentclipping centering checklistI'm not sure about the OMC situation at
40m. I think there are no direct beam reflected
back into IFO from OMC path. There must be
  
  8129   Thu Feb 21 15:21:07 2013 yutaUpdateVACall heavy doors on, started pumping down annulus[Steve, Manasa, Jenne, Sendhil, Evan,
Yuta]
  
  8141   Sat Feb 23 00:34:28 2013 yutaUpdateComputerscrontab in op340m deleted and restored (maybe)I
accidentally overwrote crontab in op340m
with an empty file.
  
  8143   Sat Feb 23 07:14:58 2013 yutaUpdateLSCcan't lock Y armI tried to align and lock Y arm for the
first time after pumping.
But I couldn't lock Y arm for more
 TRYPOY.png 
  8146   Sat Feb 23 15:26:26 2013 yutaUpdateComputerscrontab in op340m updatedI found some daily cron jobs for op340m
I missed last night. Also, I edited timings
of hourly jobs to maintain consistency with
  
  8150   Sat Feb 23 17:14:59 2013 yutaUpdateLSCcan't lock Y armJenne found that;
  0. If all mirrors are "aligned,"
Yarm flashes.
  
  8157   Mon Feb 25 15:30:29 2013 yutaUpdateAlignmentY arm locked, both colors[Koji, Yuta]

We aligned Y arm to Y green and tweaked
  
  8162   Mon Feb 25 21:25:14 2013 yutaUpdateAlignmentboth arms locked in IR[Jenne, Evan, Yuta]

After Y alignment, X arm is aligned
 QUAD1_1045890588.png 
  8164   Mon Feb 25 22:42:32 2013 yutaSummaryAlignmentcurrent IFO situation[Jenne,Yuta]

Both arms are aligned starting from
 IPANGdrift.png 
  8177   Wed Feb 27 01:09:53 2013 yutaUpdateLockingPRMI sideband/carrier locked[Jenne,Yuta]

We succeeded in locking PRMI in sideband
 6x 
  8181   Wed Feb 27 11:22:54 2013 yutaUpdateComputersbackup crontabI made a simple script to backup crontab
(/opt/rtcds/caltech/c1/scripts/crontab/backupCrontab).
  
  8182   Wed Feb 27 11:59:43 2013 yutaUpdateSUSPRM/BS coil re-balancedI re-adjusted coil gains and f2a filters
for PRM and BS.
I'm not sure what happened to PRM
 PRM_f2a20130227.pngBS_f2a20130227.png 
  8196   Thu Feb 28 02:43:49 2013 yutaUpdateLSCsome qualitative evidence of PRMI sideband lock[Manasa, Yuta]

Since we have setup POP22 PD now(
 PRMIsideband.png 
  8197   Thu Feb 28 03:25:27 2013 yutaUpdateLSCPR gain ~ 25 from PRMI carrier lock[Manasa, Yuta]

We locked PRMI in carrier. 
 PRMIcarrier.png 
  8199   Thu Feb 28 05:54:54 2013 yutaUpdateRF Systemphase tracker: calibrationI swept the frequency of RF input to the
beatbox to calibrate and check linearity
range of phase tracker.
 ALS-BEATX_FINE_PHASE_OUT.pngALS-BEATY_FINE_PHASE_OUT.png 
  8200   Thu Feb 28 06:51:17 2013 yutaUpdateRF Systemphase tracker: noise levelI measured noise level of the phase tracker
by inputting constant frequency RF signal
from marconi.
 frequencynoise.png 
  8208   Fri Mar 1 16:58:37 2013 yutaUpdateLSCXarm oscillation stoppedPOX11 oscillation at 630 Hz was stopped
by installing 630 Hz resonant gain to LSC_XARM.
After few hours, oscillation stopped.
 POX11_630Hz.png 
  8212   Sat Mar 2 05:53:15 2013 yutaUpdateLSCstable lock of PRMII tuned alignment, gains and filters to
achieve stable lock of PRMI.
It now locks quite stably with UGF
 LSCMICHOLTF_PRMI.pngLSCPRCLOLTF_PRMI.pngPRMtoAS55REFL55.png 
  8214   Sat Mar 2 20:09:12 2013 yutaUpdateRF Systemphase tracker: DAQ noise limited[Koji, Yuta]

We found that our phase tracker noise
 frequencynoisewhitening.png 
  8221   Mon Mar 4 16:46:31 2013 yutaUpdateSUSoplev calibration for PRM[Manasa, Sendhil, Yuta]

We calibrated oplev for PRM. Calibration
 PRM_PIT.pngPRM_YAW.png 
  8222   Mon Mar 4 17:32:26 2013 yutaBureaucracyGeneralflowchart for PRMI g-factor measurementI made a very useful flowchart for the
week. Our goal for the week is to measure
g-factor of PRC in PRMI.
 PRMIgfactorPlan.png 
  8230   Tue Mar 5 06:27:14 2013 yutaUpdateLSCintra-cavity power dependence on mirror misalignmentI measured intra-cavity power dependance
on mirror misalignment.
Intra-cavity
 PRM_PIT_20130305a.pngPRM_YAW_20130305b.pngITMX_YAW_20130305.pngITMY_YAW_20130305.png 
  8232   Tue Mar 5 17:09:30 2013 yutaUpdateSUSoplev calibration for ITMY[Manasa, Sendhil, Yuta]

We calibrated oplev for ITMY. Calibration
 ITMY_PIT.pngITMY_YAW.png 
  8235   Tue Mar 5 23:00:08 2013 yutaUpdateLSCYarm and PRC g-factor from misalignment measurementI fitted intra-cavity power dependance
on mirror misalignment plot with parabola
to get the g-factor.
 ITMY_YAW_20130305_DC.pngPRM_PIT_20130305a_DC.pngPRM_YAW_20130305b_DC.png 
  8236   Tue Mar 5 23:37:11 2013 yutaUpdateSUSPRM angular motion spectraI measured PRM angular motion spectra (in
daytime today).
PRM angular motion is 
 PRMangularmotion.png 
  8248   Thu Mar 7 01:43:35 2013 yutaUpdateLSCcalibrated MI differential length spectraFree swing MI differential length is 86 nm
RMS and residual length when locked
 LSCMICHOLTF_MI.pngMImotion.png 
  8252   Thu Mar 7 18:12:03 2013 yutaUpdateAlignmentInput beam drift ~ 0.1 mrad/h in pitch[Jenne, Manasa, Yuta]

We temporarily centered the beam on
 IPangulardrift.png 
  8254   Thu Mar 7 18:48:43 2013 yutaUpdateComputer Scripts / Programsreleasing my secret scriptsI released/updated my secret scripts to
real scripts directory.
I checked they run correctly (but
  
  8255   Fri Mar 8 02:17:04 2013 yutaUpdateLSCcalibration of PRM actuator[Manasa, Yuta]

We measured AC response of PRM actuator
 calibREFL55Q.pngactcalibPRM.pngOLTF_PRCL.png 
  8256   Fri Mar 8 03:07:19 2013 yutaUpdateLSCcalibrated PRM-ITMY length spectraMeasured free swing PRM-ITMY length was
230
nm RMS.
 LSCPRCLOLTF_PRITMY.pngPRITMYmotion.png 
  8259   Fri Mar 8 15:27:42 2013 yutaUpdateGreen LockingPSL green shutter installed[Manasa, Yuta]

Mechanical shutter for PSL green is
  
  8261   Fri Mar 8 16:05:56 2013 yutaBureaucracyGeneralaction items for PRMI / ALS-FPMIWe should focus our work both on PRMI and
ALS-FPMI (elog
#8250).
  
  8283   Wed Mar 13 08:34:33 2013 yutaUpdateLockingTWO arms TWO colors- I took the shutter from AS table to use
it for the PSL green. It was sitting near
MC REFL path unused (elog
  
  3778   Mon Oct 25 20:20:59 2010 yuta, JoeUpdateCDSDAQ channel number etc[U][B]Summary:[/B][/U]
  We split the old SDSEN filters to SDSEN,
SDSIDE, SDCOIL last week.
  
  11732   Wed Nov 4 20:16:58 2015 yutaroUpdateElectronicsoffset voltage vs. gain of common mode servoAt 1Y2 rack, I measured offset voltage
of the common mode servo (D040180-B)
with the gain of it varied.
  
  11737   Thu Nov 5 10:48:21 2015 yutaroUpdateElectronicsoffset voltage vs. gain of common mode servoI report the results of the measurement
to know how offset voltage of common
mode servo changes when the gain is changed.
 offset.pngoffsets.zipoffsetout.png 
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