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New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Type Category Subjectup Text Attachments
  279   Tue Jun 6 00:49:48 2017 KojiGeneralConfigurationTrans RF PD setupLast week, I further worked on the RF system
to install 20dB coupler on the agilent unit
and setup the R channel. This allowed me
  
  280   Tue Jun 6 22:00:36 2017 KojiGeneralConfigurationTrans RF PD setup- Replaced the PZT with the one used from
the beginning. This must be PZT #21. After
the replacement, the spot positions look
  
  134   Fri May 31 14:07:54 2013 KojiOpticsCharacterizationTransverse Mode Spacing measurement afte the baking Measurement for pitch
Free Spectral Range
(FSR): 264.9703 +/− 0.0007 MHz
 Cav_scan_response_130530_Pitch.pdfCav_scan_response_130530_Yaw.pdf 
  265   Mon Aug 22 12:58:16 2016 KojiGeneralGeneralUV bond samples -> Garilynn- FS base + Mounting Prism

- FS or SF2 1/2" piece + FS
or SF2 1/2" piece
  
  62   Thu Feb 7 23:01:45 2013 KojiOpticsCharacterizationUV epoxy gluing test [Jeff, Yuta, Koji]
Gluing test with UV-cure epoxy
Optocast 3553-LV-UTF-HM
  
  89   Mon Apr 1 03:23:48 2013 KojiOpticsGeneralUV power calibration[Koji Lisa Jeff Zach]
Eric G bought a UV power meter from
American Ultraviolet.
  
  239   Sun Sep 6 16:50:51 2015 KojiElectronicsGeneralUnit test of the EOM/AOM Driver S1500118TEST
Result: S1500118

Additional
 P9037810.JPGRF_AM_spectra.pdf 
  11   Tue Jul 24 11:41:29 2012 KojiGeneralGeneralUseful referencesNicolas Smith,
LIGO Document T0900383-v1
  
  32   Wed Nov 7 01:28:20 2012 KojiOpticsCharacterizationWedge angle test (A1)Wedge
angle test
Result: Wedge angle of Prism A1:
 wedge_measurement.pngwedge_measurement_setup.png 
  56   Sat Jan 19 20:47:41 2013 KojiOpticsCharacterizationWedge measurement with the autocollimatorThe wedge angle of the prism "A1"
was measured with the autocollimator (AC).
The range of the AC is 40 arcmin.
 autocollimator_wedge_measurement.pdf 
  59   Mon Feb 4 00:39:08 2013 KojiOpticsCharacterizationWedge measurement with the autocollimator and the rotation stageMethod:

    Mount the tombstone prism
on the prism mount. The mount is fixed on
 autocollimator_wedge_measurement.pdf 
  60   Wed Feb 6 02:34:10 2013 KojiOpticsCharacterizationWedge measurement with the autocollimator and the rotation stageMeasurement:

    A6:   α
= 0.665 deg, β = +3.0 arcmin (1.5 div
  
  66   Fri Mar 1 23:52:18 2013 KojiOpticsCharacterizationWedge measurement with the autocollimator and the rotation stageMeasurement:

    E1:   α = 
0.672 deg, β = +0.0  arcmin (0 div up)
  
  53   Thu Jan 10 18:37:50 2013 KojiOpticsCharacterizationWedging of the PZTsYesterday I measured the thickness of the
PZTs in order to get an idea how much the
PZTs are wedged.
 PZT_wedging.pdf 
  373   Thu Aug 29 11:51:49 2019 shrutiOpticsCharacterizationWedging of the debonded PZTs - CalculationUsing the measurements of PZTs 12,13 taken
by Stephen, I estimated the wedging angle
and orientation following Section 2.3.1 of
 PZT_Wedging_Results.pdfPZT_Wedging_Calc.pdf 
  371   Thu Aug 22 12:35:53 2019 StephenOpticsCharacterizationWedging of the debonded PZTs 2019 AugustWedge and thickness measurements of PZTs
12 and 13 took place after debonding and
cleaning - results are shown in the first
 IMG_4775.JPGIMG_4770.JPG 
  361   Wed May 15 19:07:53 2019 KojiCleanGeneralWhat is this???Suddenly something dirty emerged in the
lab. What is this? It looks like an insulation
foam or similar, but is quite degraded and
 P_20190515_185602.jpgP_20190515_185844.jpg 
  418   Thu Jul 21 13:21:27 2022 KojiGeneralConfigurationWindows laptop for WincamD Beam'R2 recoveryThe Windows laptop for WincamD/Beam'R2
(DELL Vostro3300) was not functional. 
- Windows 7 got stuck in the starting
 IMG_1102.JPG 
  28   Tue Oct 16 15:50:09 2012 KojiGeneralGeneralWork completed in August/September [!]
    Work done
   

        
  
  12   Tue Jul 31 21:29:43 2012 KojiGeneralGeneralWork completed in July [!]
    Completed Work: Facility/Supplies

   
        
  
  47   Mon Dec 31 01:45:04 2012 KojiGeneralGeneralWork completed in Nov and Dec [!]Completed work of the previous months:
[Jul]
[Aug]
  
  33   Wed Nov 7 20:21:42 2012 KojiGeneralGeneralWork completed in October [!]Completed work of the previous months:
[Jul]
[Aug]
  
  300   Mon Jul 2 15:27:31 2018 Rich AbbottElectronicsGeneralWork on EOM (3rd IFO unit)Koji, Rich

We took apart the unit removed
from the 3rd IFO (Unit serial number aLIGO
 EOM3_aLIGO_3rdIfo.JPG 
  19   Wed Aug 22 20:16:43 2012 KojiFacilityGeneralWorkbenches have been installed / Clean room stoolsLast Friday, new workbenches were installed.
Vladimir got a new table and a cleanroom
stool.
 P8171968.jpgP8171969.jpg 
  144   Fri Jun 14 06:35:21 2013 JeffGeneralGeneral[LLO] L1 OMC statushttps://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=7410
Weights:
Suspension cage and transportation
 preamp_arrangement.png 
  142   Thu Jun 13 12:04:57 2013 KojiGeneralGeneral[LLO] OMC Optical Test - completedhttps://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=7373   
  141   Mon Jun 10 10:04:37 2013 KojiGeneralGeneral[LLO] OMC Test[Koji Zach]
We worked on the OMC test over
the weekend.
 OMC_pow_cal.pdfresponsivity.pdfOMC_pow_cal_compensated.pdf 
  143   Thu Jun 13 12:12:20 2013 ZachGeneralGeneral[LLO] OMC and OMCS in LVEAhttps://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=7395
  
  140   Fri Jun 7 16:04:44 2013 KojiGeneralGeneral[LLO] OMC arrived[Koji Zach Suresh]
The OMC arrived at LLO without any
destruction!
  
  146   Tue Jun 18 15:45:38 2013 KojiGeneralGeneral[LLO] OMC installation in HAM6OMC installed
in HAM6!
  
  74   Wed Mar 20 09:38:02 2013 ZachOpticsCharacterization[LLO] OMC test bench modified For various reasons, I had to switch
NPROs (from the LightWave 126 to the Innolight
Prometheus).
 new_setup_traced.jpg 
  153   Fri Aug 16 17:21:38 2013 KojiGeneralGeneral[OMC002] Build started[Jeff Koji]

The breadboard (SN2) was loaded
on the transportation fixture.
  
  291   Thu Feb 22 20:21:02 2018 KojiOpticsCharacterizationaLIGO EOM testPOSTED
to 40m ELOG
  
  292   Mon Apr 2 17:27:04 2018 KojiOpticsCharacterizationaLIGO EOM test2nd optical test http://nodus.ligo.caltech.edu:8080/40m/13725   
  67   Tue Mar 5 19:37:00 2013 ZachOpticsCharacterizationeLIGO OMC visibility vs. power measurement detailsEDIT (ZK): Koji points out that (1 -
Ti) should really be the non-resonant reflectivity
of the aligned cavity, which is much closer
 eOMC_visibility_3_4_13.png 
  68   Wed Mar 6 23:24:58 2013 ZachOpticsCharacterizationeLIGO OMC visibility vs. power measurement detailsI found that, in fact, I had lowered
the modulation depth since when I measured
it to be 0.45 rads --> Psb = 0.1.
 TEK00005.PNGTEK00007.PNGeOMC_visibility_3_4_13.pngeOMC_AMTF_vs_power_3_6_13.png 
  107   Wed Apr 10 00:40:30 2013 ZachOpticsConfigurationfauxMC locked[Koji, Zach]
 fauxMC_labeled.jpg 
  362   Thu May 16 12:41:28 2019 ChubGeneralGeneralfire pillow found on optics tableThat is an expanding fire pillow, also
known as firebrick.  It is used to create
a fire block where holes in fire-rated walls
  
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