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ID Date Author Type Category Subjectup Text Attachments
  16070   Thu Apr 22 01:42:38 2021 KojiSummaryElectronicsHV Supply ComparisonNew HV power supply from Company 'M'
has been delivered. So I decided to compare
the noise levels of some HV supplies in the
 HV_Supply_PSD_H.pdfHV_Supply_PSD_K.pdfHV_Supply_PSD_M.pdfHV_Supply_PSD.pdf 
  15552   Tue Sep 1 15:39:04 2020 gautamUpdateElectronicsHV coil driver oscillations fixedSummary:

Increasing the compensation capacitance
(470 pF now instead of 33 pF) seems to have
 testSetup.pdfHVampNoise_driven.pdf 
  15636   Thu Oct 22 11:14:47 2020 gautamUpdateElectronicsHV coil driver packaged into 2U chassisI packaged the HV coil driver into a 2U
chassis, hoping for better shielding from
pickup. There
 HVampNoise_driven_chassis.pdfHVampNoise_dispUnits.pdfD1900163_measurementSetup.zip 
  15638   Thu Oct 22 13:04:42 2020 ranaUpdateElectronicsHV coil driver packaged into 2U chassiswhat is the noise level before the HV stage?
i.e. how well is the acromag noise being
filtered?
  
  15639   Thu Oct 22 22:01:53 2020 gautamUpdateElectronicsHV coil driver packaged into 2U chassisIt's not so easy to directly measure
this I think, because the filtering is rather
aggressive. 
 DACnoiseFilterGain.pdfDACnoiseFilterNoises.pdf 
  15640   Fri Oct 23 09:03:43 2020 anchalUpdateElectronicsHV coil driver packaged into 2U chassisAndrew made a battery-powered 0.7 nVrtHz
input-referred noise pre-amplifier for gain
of 200. That might help you.
  
  16368   Thu Sep 30 14:13:18 2021 AnchalUpdateLSCHV supply to Xend Green laser injection mirrors M1 and M2 PZT restoredLate elog, original date Sep 15th

We found that the power switch
of HV supply that powers the PZT drivers
  
  16206   Wed Jun 16 19:34:18 2021 KojiUpdateGeneralHVACI made a flow sensor with a stick and tissue
paper to check the airflow.

- The HVAC indicator was not lit,
 HVAC_Power.jpegSouth_Arm.jpegSouth_End_Tenperature.jpegVertex.jpegEast_Arm.jpeg 
  15222   Mon Feb 24 08:36:32 2020 ChubUpdateGeneralHVAC repairThe HVAC people replaced a valve and repaired
the pneumatic plumbing on the roof air handler. 
Temperature has been stable during the day
  
  4891   Mon Jun 27 16:57:06 2011 steveUpdatePhotosHaixing is backHe has moved the levitation stuff for his
surf student to Jan's lab in W-Bridge.
 P1070914.JPG 
  4489   Tue Apr 5 19:54:39 2011 KojiSummaryGreen LockingHamamatsu S3399 testSince last Friday I have been testing the
broadband RF photodetector in order to
figure out the capability of S3399 with the
 S3399_test_110405.pngS3399_test_110405.pdf 
  651   Wed Jul 9 12:42:14 2008 JohnUpdateLockingHand off to RF CARMRob, Yoichi, John

Last night we were able to reduce the CARM
 LongLock080709.png 
  15584   Sat Sep 19 18:46:48 2020 KojiUpdateGeneralHand soapI supplied a bottle of hand soap. Don't
put water in the bottle to dilute it as it
makes the soap vulnarable for cotamination.
  
  16   Thu Oct 25 23:35:36 2007 waldmanOtherOMCHang the OMC![Pinkesh, Sam]

We tried,  convicted and hung the OMC today.
 IMG_1483.jpgIMG_1481.jpg 
  21   Sat Oct 27 19:00:44 2007 waldmanConfigurationOMCHanging, locked OMC with REFL extracted.I got the OMC locked to the fiber output today.
 It was much more difficult than I expected
and I spent about 30 minutes or so flailing
  
  4262   Tue Feb 8 16:04:58 2011 josephbUpdateCDSHard coded decimation filters need to be fixed[Joe, Rana]
Filter definitions for the decimation
filters to epics readback channels (like
  
  8935   Mon Jul 29 21:57:45 2013 gautamConfigurationendtable upgradeHardware installed at 1X9 The following hardware   
  2826   Wed Apr 21 16:48:38 2010 josephbUpdateCDSHardware updateAlberto and myself went to downs and acquired
the 3rd 4x processor (Dual core, so 8x cores
total) computer.  We also retrieved
 irwin.jpg 
  4374   Thu Mar 3 18:32:33 2011 Larisa ThorneUpdateElectronicsHarmonic distortion calculations for RF distribution boxFinished calculations for harmonic distortion
at each of the 10 outputs of the RF distribution
box. The diagram can be found on Suresh's
 RFdistribboxcalcs.pdf 
  4377   Fri Mar 4 09:47:46 2011 SureshUpdateElectronicsHarmonic distortion calculations for RF distribution box 
Fast work indeed! It would be nice
if we could have the following details filled
  
  5630   Fri Oct 7 14:04:48 2011 steveUpdateSUSHe/Ne intensity noise effect on oplevsThe SRM bounce peak 18.33 Hz. Suresh helped
me to retune filter through Foton, but we
failed to remove it.
 7x 
  10678   Thu Nov 6 11:40:58 2014 SteveUpdateGeneralHe/Ne telescopeLiyuan is measuring the He/Ne telescopes
in the Y arm between the tube and CES wall.
He'll be here till 1pm
  
  10684   Fri Nov 7 10:29:56 2014 SteveUpdateGeneralHe/Ne telescope

    

       
            
  
  10731   Fri Nov 21 13:58:51 2014 ericqUpdateOptical LeversHeNe RIN test Steve had me measure the RIN of a
JDSU HeNe laser. I used a PDA520, and measured
the RIN after the laser had been running
 2014-11-21_HeNeRIN.zipRIN_P893519.pdf 
  150   Fri Nov 30 20:13:57 2007 dmassSummaryGeneralHeNe UniPhase LaserData for the Uniphase 1.9 mW HeNe laser (labeled:
"051507 From ISCT-BS") SN: 1284131 Model:
1103P
 Matlabcode.zipUniPhaseWaist.jpg 
  10517   Thu Sep 18 09:17:47 2014 SteveUpdateSUSHeNe laser test TEST QPD sn 222 was calibrated with 1103P
directly looking into it from 1 m. ND2 filter
was on the qpd.
 calibrated_16hrs.pngQPD222cal.jpg1103P40s40min.png 
  10522   Mon Sep 22 10:14:07 2014 SteveUpdateSUSHeNe laser test

    

       
            
 1103Pmon3d.png 
  10525   Tue Sep 23 08:34:14 2014 SteveUpdateSUSHeNe laser test  
 The room temp drops 1 degree
C on the 4th day. The weather has changed.
 tempDrop.png 
  10537   Thu Sep 25 10:53:32 2014 SteveUpdateSUSHeNe laser test  
 
 centeredDay6.png 
  10459   Fri Sep 5 15:28:38 2014 SteveUpdateSUSHeNe laser test preparationThe SRM qpd was moved to accommodate the
HeNe laser qualification test for LIGO Oplev
use.
 beforeRSMqpdMoved.jpgafterSRMqpdMoved.jpg1103Ptest.pngND1onQPD.png 
  10475   Tue Sep 9 08:22:28 2014 SteveUpdateSUSHeNe laser test preparation

    

       
            
 HeNecompared.png 
  10479   Tue Sep 9 16:59:32 2014 SteveUpdateSUSHeNe laser test preparation

    

       
            
 1103PqpdTranss.png 
  10489   Wed Sep 10 15:31:16 2014 SteveUpdateSUSHeNe laser test preparation

    

       
            
 SRMqpdisBack0nSRMsus.pngslowVSfast.png 
  10504   Fri Sep 12 16:30:48 2014 SteveUpdateSUSHeNe laser test preparation

    

       
            
 ND2.pngqpd222ND21103P.jpg 
  506   Fri May 30 12:03:08 2008 josephb, AndreyConfigurationCamerasHead to head comparison of camerasAndrey and myself - Joseph B. - have examined
the output of the GC650 (CCD) and GC750 (CMOS)
prosilica cameras.  We did several live motion
 Waveform_Reconstruction_May30-2008.pdf 
  12308   Mon Jul 18 05:05:05 2016 AakashUpdateGeneralHeater for Seismometer Enclosure | SURF 2016I took off the silicon rubber heaters which
were used by a SURF last year for heating
the enclosure. The heater data sheet has
 HEATERS.jpegHEATERS.jpeg 
  14110   Sat Jul 28 00:45:11 2018 terra, sandrineSummaryThermal CompensationHeater measurements overview[Sandrine, Koji, Terra]

Summary: We
completed multiple scans at different heating
 7x 
  14050   Tue Jul 10 23:44:23 2018 AnnalisaConfigurationThermal CompensationHeater setup assembly[Annalisa, Koji]

Today both the heater and the reflector
were delivered, and we set down the setup
 8x 
  14078   Tue Jul 17 17:37:46 2018 Annalisa, TerraConfigurationThermal CompensationHeaters installationSummary

We
installed two heaters setup on the ETMY bench
in order to try inducing some radius of curvature
 6x 
  12571   Wed Oct 19 16:41:55 2016 gautamUpdateGeneralHeavy doors back on[ericq, lydia, steve, gautam]


We aligned the arms, and
centered the in-air AS beam onto the PDs
 8x 
  14373   Thu Dec 20 10:28:43 2018 gautamUpdateVACHeavy doors back on for pumpdown 82[Chub, Koji, Gautam]

We replaced the EY and IOO chamber
heavy doors by 10:10 am PST. Torquing was
  
  12480   Fri Sep 9 17:50:02 2016 gautamUpdateSUSHeavy doors on BS-PRM, ETMY chambers[steve, teng, johannes, lydia, gautam]


we set about doing some
final checks on the Y arm while Johannes
  
  11021   Fri Feb 13 03:44:56 2015 JenneUpdateLSCHeld using ALS for a while at "0" CARM offset with PRMI[Jenne, Rana]

We wanted to jump right in and
see if we were ready to try the new "ALS
 QPDsaturation_12Feb2015.pdfALSfool_12Feb2015.pdf 
  4618   Tue May 3 17:19:25 2011 kiwamuUpdateElectronicsHeliax connectors on 1Y2 rack : tightenedMy observation wasn't accurate enough.
The
looseness came from the fact that the N-SMA
  
  130   Wed Nov 28 12:43:53 2007 AndreyBureaucracy Here was the PDF-file of my presentation
I was  making a report with powerpoint presentation
during that Wednesday's 40-m meeting.
  
  3421   Fri Aug 13 15:29:35 2010 AidanFrogsPhotosHere's the 40m team   40m_team.JPG 
  3424   Mon Aug 16 13:33:06 2010 ZachFrogsPhotosHere's the 40m team One day I'll get to be part of the
krew
  
  15044   Thu Nov 21 19:08:58 2019 gautamUpdateLSCHigh BW lock of Y arm length to PSL frequencySummary:

The Y arm cavity length was locked
to the PSL frequency with ~26kHz
 highBW_POY.pdfCM_UGF.pdfIN2_ACcoupling.pdf 
  10002   Thu May 29 02:16:02 2014 ericqUpdateLSCHigh Bandwidth power recycled Yarm. I'll put more detail in the morning, but
I was able to get the PRM/ITMY/ETMY coupled
cavities locked with 32kHz bandwidth using
 quickOLTFs.pdf 
  10004   Thu May 29 14:40:17 2014 KojiUpdateLSCHigh Bandwidth power recycled Yarm. Wait. It is not so clear.
Do you mean that the IFO was locked
with REFL11I for the first time? 
  
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