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  40m Log, Page 336 of 341  Not logged in ELOG logo
ID Date Authorup Type Category Subject Text Attachments
  3943   Thu Nov 18 00:40:31 2010 yutaUpdateIOOPRM reflected beam reached AP table(Kiwamu, Yuta)

Summary:
  
  3948   Thu Nov 18 16:32:21 2010 yutaSummaryCDScurrent damping status for all optics c1sus handlesSummary:
   I set Q-values for each
ringdown of PRM, BS, ITMX, ITMY, MC1, MC2,
 c1susdampings.png 
  3957   Fri Nov 19 17:12:22 2010 yutaUpdateCDSETMX damped, but with weird TO_COIL matrixBackground:
  c1iscex machine is currently
being setup and RT model c1scx is running.
 ETMXdamping.png 
  3959   Sat Nov 20 01:58:56 2010 yutaHowToCDSeditting RT models and MEDM screens(Suresh, Yuta)

If you come up with a good idea and
  
  3960   Sat Nov 20 02:25:30 2010 yutaUpdateCDS2 LOCKINs for suspension models(Suresh, Koji, Yuta)

Background:
 LockinRoll.png 
  3961   Sat Nov 20 03:37:11 2010 yutaSummaryCDSCDS time delay measurement - the ripple(Koji, Joe, Yuta)

Motivation:
 c1tst16Kdelay.png 
  6654   Mon May 21 21:27:39 2012 yutaUpdateCDSMEDM suspension screens using macroBackground:
 We need more organized MEDM
screens. Let's use macro.
  
  6663   Tue May 22 20:46:38 2012 yutaUpdateCDSMEDM suspension screens using macroI fixed the problem Jamie pointed out in
elog #6657
and #6659.
  
  6677   Thu May 24 16:13:05 2012 yutaUpdateComputersASS scripts on new ubuntu machines[Den, Yuta]

Background:
  
  6709   Tue May 29 21:05:30 2012 yutaUpdateIOOPMC, MC alignment are shit

    

       
            
  
  6713   Wed May 30 01:35:15 2012 yutaUpdateGreen Lockingaligned Y arm green beam[Jenne, Yuta]
We aligned the Y arm for IR (C1:LSC-TRY_OUT
is now ~ 0.9), and aligned the green beam
  
  6715   Wed May 30 15:51:22 2012 yutaUpdateIOOMC beam spot oscillation[Koji, Suresh, Jenne, Yuta]
Background:
  We noticed that the beam spots
 specMC3_onoff_localdamping.pdf 
  6718   Wed May 30 19:27:38 2012 yutaUpdateIOOMC beam spot oscillation[Koji, Yuta]  
We found that C1:SUS-MC{1,2,3}_TO_COIL_3_4_GAIN
  
  6724   Thu May 31 01:27:16 2012 yutaUpdateGreen LockingPSL and Y arm green beams aligned[Jenne, Yuta]
We aligned the PSL green optics so
that the PSL green beam and Y arm green beam
  
  6725   Thu May 31 01:36:17 2012 yutaUpdateGreen LockingGREEN_TRX/GREEN_TRY PDsI did the cabling for monitoring DC transmission
of the green beam from the end table.
The two PDs are called GREEN TRX and
  
  6726   Thu May 31 02:27:24 2012 yutaUpdateIOOscript for reliefing MC WFSI wrote a simple script for reliefing MC
WFS servo. The script is located at /opt/rtcds/caltech/c1/scripts/MC/reliefMCWFS.
  
  6727   Thu May 31 04:03:17 2012 yutaUpdateIOOscript for MC beam spot measurementI wrote a wrapping script for measuring
MC beam spot. We had to run several scripts
for the measurement (see elog #6688),
  
  6731   Thu May 31 16:19:07 2012 yutaUpdateGreen Lockingtemperature setting for PSL doubling crystalI fixed the temperature control of the
oven for the PSL doubling crystal.
The PID settings were not good, and
  
  6746   Sat Jun 2 03:19:37 2012 yutaUpdateGreen LockingY green beat note found? - too smallSummary:
  I tried to find Y arm green
beat in order to do the mode scan.
 CIMG1437.JPG 
  6757   Tue Jun 5 21:09:40 2012 yutaUpdateComputer Scripts / Programshacked ezca toolsCurrently, ezca tools are flakey and fails
too much.
So, I hacked ezca tools just like
  
  6763   Wed Jun 6 02:28:02 2012 yutaUpdateGreen Lockingtried to see Yarm length change with weak beat note[Jenne, Yuta]

Summary:
 beatycoarseringdown20120605.pngbeatysetup20120605.png 
  6767   Wed Jun 6 15:16:00 2012 yutaUpdateIOOMC WFS offsets adjustedMC reflection (C1:IOO-MC_RFPD_INMON) got
worse when WFS servos were on. After aligning
MC optics, it will be ~0.5 but if I turned
  
  6771   Wed Jun 6 21:11:45 2012 yutaUpdateGreen Lockingimproved Y arm green alignmentSummary:
  Y arm green transmission to
the PSL table improved from ~ 20 uW to 61
 beatygreenpower20120606.png 
  6775   Thu Jun 7 01:46:05 2012 yutaSummaryGreen LockingY green beat - found it!!I found the big big Y green beat. Details
will be posted later.
 CIMG1504.JPG 
  6776   Thu Jun 7 02:25:27 2012 yutaUpdateGreen Lockingimproved Y arm green alignment - even more[Koji, Yuta]

Summary:
 beatygreenpower20120607.png 
  6777   Thu Jun 7 02:59:31 2012 yutaUpdateGreen LockingY green beat - found it!!Summary:
  I found the big green beat
note for the Y arm. The alignment of the
  
  6778   Thu Jun 7 03:37:26 2012 yutaUpdateCDSmx_stream restarted on c1lsc, c1ioo c1lsc and c1ioo computers had FB net statuses
all red. So, I restarted mx_stream on each
computer. 
  
  6779   Thu Jun 7 05:39:41 2012 yutaUpdateGreen Lockingcoarsely stabilized Y arm length with ALSI coarsely stabilized Y arm length to off
resonance point for IR using ALS.
Currently, ASL servo loop is unstable
 MyFirstALS20120607.png 
  6788   Thu Jun 7 18:46:13 2012 yutaUpdateSUSPRM oplev centeredPRM oplev beam was not hitting on the QPD
since Jun 1, so I centered it. I reverted
the oplev servo gains and now oplev servo
  
  6789   Fri Jun 8 15:08:27 2012 yutaUpdateGreen Lockingaligned/mode-matched Y green beat setupLaser temperature settings for Y arm green
work today are;
  
  6794   Mon Jun 11 21:50:08 2012 yutaUpdateGreen Lockingbeatbox looks OKSummary:
  We need I-Q frequency deiscriminator
to control the arm length fine and continuously.
 CIMG1522.JPG 
  6798   Tue Jun 12 01:58:33 2012 yutaUpdateGreen Lockingaligned Y arm to Y end green[Jenne, Yuta]

We aligned Y arm to the Y end green
  
  6808   Tue Jun 12 20:35:46 2012 yutaUpdateGreen Lockingc1gcv recompiled[Jamie, Yuta]

We recompiled c1gcv because the order
 c1gcv20120612-2.png 
  6809   Tue Jun 12 23:18:18 2012 yutaUpdateGreen LockingI-Q signals for the beat[Mengyao, Yuta]

 FINEIQplot20120612.pngCOARSEIQplot20120612.pngbeatysetup20120612.png 
  6810   Wed Jun 13 02:11:59 2012 yutaUpdateGreen Lockingmy first modescan (sort of)I stabilized Y arm length by using only
I phase coarse signal from the beat(C1:ALS-BEATY_COARSE_I_ERR).
I sweeped the arm length by injecting
 modescan20120612_1.png 
  6812   Wed Jun 13 03:03:38 2012 yutaUpdateGreen Lockingmy first modescan (sort of)Linear range df of the delay line technique
is about df ~ c/(2D). So, the linear range
for the fine signal(delay line length D=30m)
  
  6815   Wed Jun 13 17:39:13 2012 yutaUpdateGreen Lockingcalibrating the beatbox[Jenne, Yuta]

We put 0 dBm sine wave to the RF input
 ALS-BEATY_COARSE_I_IN1_DQ.pngALS-BEATY_COARSE_Q_IN1_DQ.pngALS-BEATY_FINE_I_IN1_DQ.pngALS-BEATY_FINE_Q_IN1_DQ.png 
  6816   Thu Jun 14 01:36:34 2012 yutaUpdateGreen Lockingcan't scan Y arm for 1FSR[Jenne, Koji, Yuta]

We tried to scan of the Y arm but
 BEATY_COARSE_LoopOnOff.png 
  6817   Thu Jun 14 04:53:39 2012 yutaSummaryGreen Lockingdesigning ALS loop for mode scan[[Requirement]]
 Arm cavity FWHM for IR is 
 ALSloop.pngALSopenloop.pngyarmlength.png 
  6818   Thu Jun 14 21:37:37 2012 yutaUpdateGreen Lockingsucceeded in 1FSR mode scan[Jenne, Yuta]

We couldn't scan the Y arm for 1FSR
 YarmScan20120614.png 
  6819   Fri Jun 15 00:50:54 2012 yutaUpdateGreen Lockingscanned Y arm for 5FSRI scanned Y arm for 5FSR (below).
I could done this after I put a whitening
filter.
 YarmScan20120614_2.png 
  6821   Fri Jun 15 13:33:39 2012 yutaUpdateGreen LockingADC noise contribution to ALSADC noise is not a limiting noise source
in a current ALS setup.
 YarmALSnoise20120615.png 
  6822   Sat Jun 16 01:03:21 2012 yutaUpdateGreen Lockingused longer delay line for mode scan[Mengyao, Yuta]

Last night, I used 1.5 m delay line
 YarmScan20120615.png 
  6824   Sat Jun 16 13:01:17 2012 yutaUpdateGreen Lockingscanned Y arm for 5FSR

    

       
            
 YarmScanDV.png 
  6825   Sat Jun 16 18:17:00 2012 yutaUpdateGreen LockingY arm length using 5FSR scanCalibrating error signal to beat
frequency;
  I injected 0 dBm RF sine wave
 ALS-BEATY_COARSE_I_IN1_DQ.pngCalibYarmScan20120614_2.png 
  6827   Sat Jun 16 19:32:11 2012 yutaUpdateGreen LockingY arm length using 5FSR scanI know!
But I think there's some error (~
10% ?) in calibrating the beatbox. In elog
  
  6828   Mon Jun 18 02:31:43 2012 yutaSummaryGreen Lockinganalysis of mode scan dataI analyzed mode scan data from last week.
Mode matching ratio for Y arm is 86.7
 coarse5FSRscan.pngfine1FSRscan.pngHOMRFSB.pngcoarse5FSRscanHOMRFSB.png 
  6830   Mon Jun 18 17:28:03 2012 yutaSummaryComputersbugs in CDS_PARTS/simLinkParts/FcnFcn module in CDS_PARTS is used to include
a user defined function in a model.
We should be able to use this by entering
 model_sindegbug.pngdv_sindegbug.png 
  6832   Mon Jun 18 23:54:31 2012 yutaUpdateGreen Lockingphase tracker for ALS[Koji, Jenne, Yuta]

Summary:
 newIQLOCK.pngYarmScan20120618.pngfine8FSRscan.png 
  6834   Tue Jun 19 23:36:19 2012 yutaUpdateLSCcalibrated POY error signal[Jenne, Yuta]

We calibrated POY error signal(C1:LSC-POY11_I_ERR).
 LSCyarmTF_usingITMY.pngLSCyarm_HAover1plusG.pngPOYerrorcalibration.png 
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