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ID Dateup Author Type Category Subject Text Attachments
  14208   Fri Sep 21 19:50:17 2018 KojiUpdateCDSFrequent time outMultiple realtime processes on c1sus are
suffering from frequent time outs. It eventually
knocks out c1sus (process).
 33.png49.pngScreenshot_from_2018-09-21_21-52-54.png 
  14210   Sat Sep 22 00:21:07 2018 KojiUpdateCDSFrequent time out[Gautam, Koji]

We had another crash of c1sus and
Gautam did full power cycling of c1sus. It
 23.png 
  14211   Sun Sep 23 17:38:48 2018 yukiUpdateASCAlignment of AUX Y end green beam was recovered[ Yuki, Koji, Gautam ]

An alignment of AUX Y end green
beam was bad. With Koji and Gautam's
  
  14212   Sun Sep 23 19:32:23 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Gautam ]

The setup I designed before has
abrupt gouy phase shift between two steering
 Pic_NewSetup0923_AUXYgreen.jpegModeMatchingSolution_Result.pdfModeMatchingSolution_Magnified_0923.jpgpic0923_1.jpgpic0923_2.jpg 
  14213   Sun Sep 23 20:15:35 2018 KojiSummaryOMCMontecarlo simulation of the phase difference between P and S pols for a modeled HR mirror Link to OMC_Lab
ELOG 308
  
  14214   Mon Sep 24 11:09:05 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Steve ]

With Steve's help, we checked
a new lens can be set soon after dichroic
 pic0924_1.jpg 
  14215   Mon Sep 24 15:06:10 2018 gautamUpdateVACc1vac1 reboot + TP1 controller replacement[steve, gautam]

Following the procedure in this
 beforeReboot.pngafterReboot.pngCC1.png 
  14216   Tue Sep 25 18:08:50 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Gautam ]

We want to remotely control steeing
PZT mirrors so its driver is needed.
  
  14217   Wed Sep 26 10:07:16 2018 SteveUpdateVACwhy reboot c1vac1Precondition: c1vac1 & c1vac2 all LED
warning lights green [ atm3 ], the only error
message is in the gauge readings NO COMM,
 NOcomm.pngReboot_&_sawp.pngc1vac1&2_.jpg 
  14218   Thu Sep 27 14:02:55 2018 yukiConfigurationASCPZT driver board verification[ Yuki, Gautam ]

I fixed the input terminal that
had been off, and made sure PZT driver
 PZTdriverSimulationDiagram.pdfPZTdriverSimulationResult.pdfPZTdriverPerformanceCheck_ResultOUT.pdfPZTdriverPerformanceCheck_ResultMON.pdfPZTdriver.asc 
  14219   Sun Sep 30 20:14:51 2018 yukiConfigurationASCQPD calibration[ Yuki, Gautam, Steve ]

Results:
I calibrated a QPD (D1600079, V1009)
 QPDcalibrationXaxis.pdfQPDcalibrationYaxis.pdf 
  14220   Mon Oct 1 12:03:41 2018 not yukiConfigurationASCPZT driver board verificationI assume this QPD set is a D1600079/D1600273
combo.

How much was the SUM output during
  
  14221   Mon Oct 1 13:33:55 2018 yukiConfigurationASCQPD calibration


Quote:


 Pic_QPDcalibration.jpg 
  14222   Mon Oct 1 20:39:09 2018 gautamConfigurationASCc1asyWe need to set up a copy of the c1asx   
  14223   Mon Oct 1 22:20:42 2018 gautamUpdateSUSPrototyping HV Bias CircuitSummary:

I've been plugging away at
Altium prototyping the high-voltage bias
 CoilDriverBias.pdfcurrentNoise.pdfPSRR.pdf 
  14224   Tue Oct 2 18:50:53 2018 yukiConfigurationASCPZT mirror calibration[ Yuki, Gautam ]

I calibrated PZT mirrors. The ROUGH
result was attached. (Note that some errors and
 PZTM1calibrationCH2.pdfPZTM1calibrationCH1.pdfPZTM2calibrationCH2.pdfPZTM2calibrationCH1.pdf 
  14225   Tue Oct 2 23:57:16 2018 gautamUpdatePonderSqueezeSqueezing scenarios[kevin,
gautam]
 PonderSqueeze_NB_LORIN.pdf 
  14226   Wed Oct 3 14:24:40 2018 yukiConfigurationASCY end table upgrade planInterim Procedure Report:

Purpose

The current setup of AUX Y-arm
  
  14227   Wed Oct 3 18:15:34 2018 yukiConfigurationASCAI board improvement[ Yuki, Gautam ]

I improved Anti-Imaging board (D000186-Rev.D),
which will be put between DAC port and
 TF_AIboard.pdf 
  14228   Thu Oct 4 00:44:50 2018 yukiConfigurationASCAI board improvement[ Yuki, Gautam ]

I made a cable which connects DAC
port (40 pins) and AI board (25 pins). I
  
  14229   Thu Oct 4 08:25:50 2018 SteveUpdateVACrga scan pd81 at day 78 

 
 pd81d78.png 
  14230   Thu Oct 4 22:15:30 2018 yukiConfigurationASCY-end table upgradeBefore changing setup at Y-end table, I
measured the status value of the former setup
as follows. These values will be compared
 AUXYGreenLock20180921.jpgPic_FormerSetup.jpegPic_CurrentSetup1004.jpg 
  14231   Fri Oct 5 00:46:17 2018 KojiConfigurationASCY-end table upgrade???

The SHG crystal has the conversion
efficiency of ~2%W (i.e. if you have 1W input
  
  14232   Fri Oct 5 17:32:38 2018 yukiConfigurationASCY-end table upgradeI measured it with the wrong setting of
a powermeter. The correct ones are here:


beam power going into doubling
  
  14233   Fri Oct 5 17:47:55 2018 gautamConfigurationASCY-end table upgradeWhat
about just copying the Xend
  
  14234   Fri Oct 5 22:49:22 2018 yukiConfigurationASCY-end table upgradeI designed a new layout. It has good mode-matching
efficiency, reasonable sensitivity to component
positions, good Gouy phase separation. I'm
  
  14235   Sun Oct 7 16:51:03 2018 gautamConfigurationLSCYarm triggering changedTo facilitate Yuki's alignment of the
EY green beam into the Yarm cavity, I have changed
  
  14236   Sun Oct 7 22:30:42 2018 yukiConfigurationLSCYarm Green locking was recoveredI finished installation of optics in the
Y-end and recovered green locking. Current
ALS-TRY_OUTPUT is about 0.25, which is lower
 Pic_NewLayout1007.jpgYendGreenModeMatching.zip 
  14237   Mon Oct 8 00:46:35 2018 yukiConfigurationASCY-end table upgrade


Quote:


  
  14238   Mon Oct 8 18:56:52 2018 gautamConfigurationASCc1asx filter coefficient file missingWhile pointing Yuki to the c1asx servo
system, I noticed that the filter
file for c1asx is missing in the usual chans
  
  14239   Tue Oct 9 16:05:29 2018 gautamConfigurationASCc1tst deleted, c1asy deployed.Setting up c1asy:


Backed up old c1tst.mdl
as c1tst_old_bak.mdl in /opt/rtcds/userapps/release/cds/c1/models
Copied
 CDSoverview_ASY.png 
  14240   Tue Oct 9 23:03:43 2018 yukiConfigurationLSCYarm Green locking was recovered[ Yuki, Gautam, Steve ]

To align the green beam in Y-end
these hardware were installed:
 Pic_1Y4.jpgPic_PZTcable.jpg 
  14241   Wed Oct 10 12:38:27 2018 yukiConfigurationLSCAll hardware was installedI connected DAC - AIboard - PZTdriver -
PZT mirrors and made sure the PZT mirrors
were moving when changing the signal
  
  14243   Thu Oct 11 13:40:51 2018 yukiUpdateComputer Scripts / Programsloss measurements


Quote:


  
  14244   Fri Oct 12 08:27:05 2018 SteveUpdateVACdrypumpGautam and Steve,

Our TP3 drypump seal is at 360
mT [0.25A load on small turbo]  after
 forepump.png 
  14245   Fri Oct 12 12:29:34 2018 yukiUpdateComputer Scripts / Programsloss measurementsWith Gautam's help, Y-arm was locked.
Then I ran the script "armloss_dcrefl_asdcpd_scope.py"
which gets the signals from oscilloscope.
  
  14247   Fri Oct 12 17:37:03 2018 SteveUpdateVACpressure gauge choices We want to measure the pressure gradient
in the 40m IFO

Our old MKS cold cathodes are out
  
  14248   Fri Oct 12 20:20:29 2018 yukiUpdateComputer Scripts / Programsloss measurementsI ran the script for measuring arm-loss
and calculated rough Y-arm round trip loss
temporally. The result was 89.6ppm. (The
  
  14251   Sat Oct 13 20:11:10 2018 yukiUpdateComputer Scripts / Programsloss measurements


Quote:


  
  14253   Sun Oct 14 16:55:15 2018 not gautamUpdateCDSpianosa upgradeDASWG is not what we want to use for config;
we should use the K. Thorne LLO
instructions, like I did for ROSSA.
  
  14254   Mon Oct 15 10:32:13 2018 yukiUpdateComputer Scripts / Programsloss measurementsI used these values for measuring armloss:


Transmissivitity of ITM
= 1.384e-2 * (1 +/- 1e-2) 
Transmissivitity
 XARM_20181015_1500.pdfYARM_20181015_1500.pdf 
  14255   Mon Oct 15 12:52:54 2018 yukiUpdateComputer Scripts / Programsadditional comments


Quote:


  
  14256   Mon Oct 15 13:59:42 2018 SteveUpdateVACdrypump replacedSteve & Bob,

Bob removed the head cover from
the housing to inspect the condition of the
 drypump_swap.png 
  14257   Mon Oct 15 20:11:56 2018 yukiConfigurationASCY end table upgrade planFinal Procedure Report for Green Locking
in YARM:

Purpose
  
  14258   Tue Oct 16 00:44:29 2018 yukiUpdateComputer Scripts / Programsloss measurementsThe scripts for measuring armloss are in
the directory "/opt/rtcds/caltech/c1/scripts/lossmap_scripts/armloss_scope".


armloss_derefl_asdcpd_scope.py:
  
  14259   Wed Oct 17 09:31:24 2018 SteveUpdatePSLmain laser offThe main laser went off when PSL doors
were opened-closed. It was turned back on
and the PSL is locked.
 Inno2wFlipped_off.png 
  14260   Wed Oct 17 20:46:24 2018 yukiConfigurationASCY end table upgrade planTo do for Green Locking in YARM:

The auto-alignment servo should
be completed. This servo requires many parameters
  
  14261   Thu Oct 18 00:27:37 2018 KojiUpdateSUSSUS PD Whitening board inspection[Gautam, Koji]

As a part of the preparation for
the replacement of c1susaux with Acromag,
 43.png 
  14262   Mon Oct 22 15:19:05 2018 SteveUpdateVACMaglev controller servicedGautam & Steve,

Our controller is back with Osaka
maintenace completed. We swapped it in this
 our_controller_is_back.png 
  14263   Thu Oct 25 16:17:14 2018 SteveUpdatesafetysafety trainingChub Osthelder
received 40m specific basic safety traning
today.
  
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