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New entries since:Wed Dec 31 16:00:00 1969
ID Date Authorup Type Category Subject Text Attachments
  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
  
  16827   Tue May 3 21:05:23 2022 yutaUpdateBHDAS path alignment, removing a lot of green stuff[Tega, Yehonathan, Koji, Yuta]

We tried to align AS path this afternoon.
 7x 
  16850   Thu May 12 20:24:29 2022 yutaUpdateBHDPOX and POY investigation[Anchal, Yuta]

We checked POX and POY RF signal chains
 POY.JPG 
  16856   Mon May 16 13:22:59 2022 yutaUpdateBHDREFL and AS paths aligned at AP tableAfter Xarm and Yarm were aligned by Anchal
et al, I aligned AS and REFL path
in the AP table.
 REFLPOP.JPGPOPAS.JPG 
  16865   Thu May 19 18:56:08 2022 yutaUpdateBHDCurrent OSEM sensor values with all the suspensions alignedCurrent OSEM sensor values with all the
suspensions aligned are attached.
For 'BS','ITMX','ETMX','ITMY','ETMY','PRM','SRM','LO1','LO2',
 OSEMS.txt 
  16873   Wed May 25 16:38:27 2022 yutaUpdateSUSSuspensions quick health check[JC, Yuta]

We did a quick health check of
suspesions after the pump down.
 Screenshot_2022-05-25_16-46-13.pngOSEMcheck.JPG 
  16875   Wed May 25 17:34:47 2022 yutaConfigurationBHDIFO recovery - IFO alignmentIFO aligned to maximize flashings, except
for GRY and LO-AS.
 Screenshot_2022-05-25_17-47-57.png 
  16877   Thu May 26 19:55:43 2022 yutaConfigurationBHDOplevs centered, BHD DCPDs are now online[Paco, Yuta]

We have aligned the IFO (except
for LO-AS and GRY), and centered
 elog_1Y2.JPGelog_BHD.JPGelog_box.JPGScreenshot_2022-05-26_17-37-27_IFOaligned_OplevCentered.pngScreenshot_2022-05-26_20-35-02.png 
  16880   Fri May 27 17:45:53 2022 yutaConfigurationBHDBHD camera installed, GRY aligned[JC, Paco, Yuta]

After the IFO recovery (elog 40m/16881),
  
  16884   Wed Jun 1 11:56:28 2022 yutaUpdateALSShutter driver for GRY replaced[JC, Yuta]

We replaced a shutter driver for GRY
 Screenshot_2022-06-01_12-01-53.png 
  16886   Thu Jun 2 20:05:37 2022 yutaConfigurationPSLIMC input power recovered to 1W, some alignment works[Paco, Yuta]

We have
 Before.JPGAfter.JPG 
  16888   Fri Jun 3 15:22:51 2022 yutaUpdateLSCBoth arms locked with POY/POX, IR beam centered on TMs with ASS[JC, Paco, Yuta]

We locked both Y and X arms with POY11
 IRBeamsOnTMs.JPGScreenshot_2022-06-03_15-03-51.png 
  16889   Fri Jun 3 17:42:50 2022 yutaUpdateLSCMICH locks with AS55_QAS path at AP table as re-aligned and confirmed
that MICH can be locked with AS55 Q.
 Screenshot_2022-06-03_17-41-55.png 
  16894   Mon Jun 6 21:01:22 2022 yutaUpdateIMCMC1 OSEM sensor sign flipped, MC1/2/3 free swinging overnight for inmat diagonalization[Tomislav Andric, Rana, Yuta]

We put -1 to MC1 OSEM sensor gains
and re-tuned MC1 damping.
 Screenshot_2022-06-06_21-05-28.png 
  16896   Tue Jun 7 17:26:21 2022 yutaUpdateSUSITMY ULCOIL mystery not solved[Paco, Yuta]

We investigated the ITMY ULCOIL
issue (40m/16873).
 ULCoilInductance.JPGULCoilResistance.JPGWrongSetting.JPG 
  16898   Tue Jun 7 19:13:12 2022 yutaUpdateSUSAgreement on suspension damping loop polarity conventionsAnchal, Paco and I agreed to follow
the polarity conventions below for suspension
damping loops.
 NoteBeforeChanges.JPG 
  16903   Wed Jun 8 18:16:20 2022 yutaUpdateSUSITMY ULCOIL mystery: Coil driver swap testTo see if the ULCOIL channel of the ITMY coil driver
is working or not, I swapped ITMY coil
 Screenshot_2022-06-08_18-10-44.pngSWAP.JPG 
  16905   Fri Jun 10 13:02:14 2022 yutaUpdateSUSITMY ULCOIL mystery: Coil driver swap testITMY ULCOIL was measured to have ~3.3 mH
as measured from the flange. RTFE 40m/16896
.
  
  16907   Fri Jun 10 15:02:04 2022 yutaUpdateSUSServo gain sign flipped for MC1 WFS reliefThe servo gain for MC1 in /opt/rtcds/caltech/c1/Git/40m/scripts/MC/WFS/reliefWFS
was flipped to account for COIL_GAIN flip
done in 40m/16898.
 Screenshot_2022-06-10_15-04-46.png 
  16909   Fri Jun 10 20:11:46 2022 yutaUpdateASCYarm ASS re-tuning in progress[Anchal, Yuta]

We tried to re-tune Yarm ASS today.
 Screenshot_2022-06-10_20-10-52.png 
  16910   Fri Jun 10 21:10:01 2022 yutaUpdateSUSITMY ULCOIL mystery: Coil driver swap testWe checked the photos we have, but we didn't
have the photos which show ULCOIL situation
clearly.
  
  16911   Mon Jun 13 20:26:09 2022 yutaUpdateASCYarm ASS re-tuning in progress -part 2-[Anchal, Yuta]

We are still in the progress of re-commissioning
 Screenshot_2022-06-13_20-47-12.pngScreenshot_2022-06-13_20-44-43.png 
  16914   Tue Jun 14 19:34:06 2022 yutaUpdateSUSResonant frequency identification from the free swing test[JC, Anchal, Yuta]

We are working on resonant frequency
idendification from the free swing test done
 7x 
  16919   Wed Jun 15 15:45:37 2022 yutaUpdateSUSLO1 LLCOIL now working, it was loose connectionWe tracked the issue of LO1 LLCOIL not
actuating LO1, and found that the DB9 cable
from the coil driver to the sat amp was loose.
 Measurement.JPGBAD.JPGScreenshot_2022-06-15_15-59-05.png 
  16920   Wed Jun 15 17:03:17 2022 yutaUpdateSUSITMY ULCOIL issue solved, loose connection in sat amp box[Anchal, Yuta]

We fixed the issue of ITMY ULCOIL
 Measured16Ohms.JPGSatAmpTerminator.JPGBAD.JPGSUCCESSFUL_KICK.png 
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