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New entries since:Wed Dec 31 16:00:00 1969
ID Datedown Author Type Category Subject Text Attachments
  463   Tue Nov 29 15:54:47 2022 KojiGeneralConfigurationWindows laptop for WincamD Beam'R2 recoveryAaron took the set to Cryo lab

 
  
  462   Mon Nov 21 19:13:35 2022 KojiGeneralGeneralTransmission measurement (2nd deep cleaning of OMC #1)OMC Transmission measurement after
the 2nd deep cleaning

The 2nd deep cleaning didn't
 PXL_20221122_030736513.jpgOMC_loss.pdf 
  461   Fri Nov 18 18:41:05 2022 Camille MakaremGeneralGeneral2nd deep cleaning of OMC #1The four cavity mirrors in OMC #1 were
each scrubbed using acetone and a cotton
swab.
 PXL_20221118_213955948.jpg 
  460   Thu Nov 17 19:50:00 2022 KojiOpticsCharacterizationConclusion on the cleaning of OMC #001Conclusion on the cleaning of OMC
#001

- After a couple of first contact
 OMC_loss.pdf 
  459   Thu Nov 17 18:56:22 2022 KojiOpticsGeneral Transmission measurements of OMC #1 after deep cleaning[Camille, Koji]

- Removed the first contact we
left on Monday.
 PXL_20221117_232145418.jpgScreen_Shot_2022-11-17_at_19.02.31.png 
  458   Tue Nov 15 11:12:24 2022 KojiOpticsGeneralOMC #1 fogging on the AR side of BS1 cleaned[Camille, Koji]

Photo of the BS1 AR cleaning process

Attachment 1: Before cleaning.
 PXL_20221114_225338114.jpgPXL_20221114_232824245.jpgPXL_20221114_233714774.jpgPXL_20221114_233748631.jpg 
  457   Tue Nov 15 10:58:53 2022 KojiOpticsGeneralOMC #1 damaged black glass removal[Camille, Koji]

The damaged black glass was removed
from the OMC breadboard leaving the glass
 PXL_20221114_222641455.jpgPXL_20221114_222544330.jpgPXL_20221114_222555849.jpgPXL_20221114_233748631.jpg 
  456   Tue Nov 15 07:46:58 2022 Camille MakaremOpticsGeneralcleaning OMC #1Monday, November 14, 2022

Camille and Koji did a "deep
cleaning" of OMC#1:
  
  455   Mon Nov 14 09:27:13 2022 KojiOpticsCharacterizationtransmission measurements through OMC #1 (before cleaning)The measured total optical loss of the
OMC was

1st:   0.015 +/- 0.003
 OMC_Powerbudget.xlsx 
  454   Mon Nov 14 08:34:45 2022 CamilleOpticsCharacterizationtransmission measurements through OMC #1 (before cleaning)[Camille, Koji]

Friday, Nov 11th, 2022

Setting up OMC #1 for transmission
 PXL_20221111_200942943.jpgPXL_20221111_200957951.jpg 
  453   Fri Nov 11 19:07:48 2022 KojiSupplyGeneralSupply OrderClean Supply Ordered


TexWipe TX8410 AlphaSat
Vectra Alpha 10 50 sheets x 12 pk  (VWR
  
  452   Mon Nov 7 22:00:33 2022 KojiOpticsConfigurationSetting up the fiber couplersFiber matching: 43.2/56.7 = 76%
S/P-pol ratio 0.7/43.2 = 1.6%

 
  
  451   Mon Nov 7 21:16:16 2022 CamilleOpticsConfigurationSetting up the fiber couplers[Camille, Koji]

Began setting up fiber assembly
for OMC testing:
 PXL_20221108_003849213.jpgPXL_20221108_003909265.jpgPXL_20221108_003929309.jpg 
  450   Mon Sep 26 14:27:49 2022 KojiGeneralGeneralLLO OMC ICS workOMC
#001


ICS Link: https://ics.ligo-la.caltech.edu/JIRA/browse/ASSY-D1201439-1
Already
  
  449   Tue Sep 20 08:54:33 2022 KojiGeneralGeneralPD cage arrangementUpon the LLO work, the current PD arrangement
in the cages are:
CAGE B
  
  448   Fri Aug 26 22:29:02 2022 KojiGeneralGeneralTool Shipping PrepShipping preparation for the LLO
trip

Started
July 15, 2022 and finished Aug 30. So it
 PXL_20220831_025623318.jpgPXL_20220831_024518032.jpgPXL_20220831_030234581.jpg 
  447   Thu Aug 25 20:05:00 2022 KojiGeneralGeneralLLO OMC #001 Ballast Mass investigationHere is the balance mass info for the LLO
OMC#001 analyzed from the photographs


Added masses are: 50+10g,
 balance_mass_config_LLO.pdf 
  446   Thu Aug 25 14:22:08 2022 KojiGeneralGeneralLLO OMC #001 Ballast Mass investigationInspected the past LLO add-on mass configuration.

There are unknown masses at the
DCPD side. It looks like a small SS mass
 DSCN0917.JPGDSCN0922.JPGP6108705.JPGP6108707.JPGP6108706.JPG 
  445   Wed Aug 24 11:29:47 2022 KojiGeneralGeneralOMC #002 ready for shipment[Stephen Koji]

The OMC #002 is ready for
shipment.
 IMG_1207.JPGPXL_20220825_004259850.jpgPXL_20220825_004307204.jpgPXL_20220825_005423342.jpgPXL_20220825_005549985.jpg 
  444   Wed Aug 24 03:26:43 2022 KojiGeneralGeneralOMC #002 Delamination repair Part2 (3)Inspection

 
 8x 
  443   Wed Aug 24 03:20:59 2022 KojiGeneralGeneralOMC #002 Delamination repair Part2 (2)Bonding  11x 
  442   Wed Aug 24 02:57:43 2022 KojiGeneralGeneralEP30-2 bonding setupEP30-2 bonding setup  IMG_1178.JPGIMG_1179.JPGIMG_1180.JPG 
  441   Wed Aug 24 02:53:46 2022 KojiGeneralGeneralOMC #002 Delamination repair Part2 (1)Inspection of the delaminations in the
optics side
 IMG_1168.JPGIMG_1169.JPGIMG_1170.JPGIMG_1171.JPGIMG_1175.JPG 
  440   Wed Aug 24 02:51:23 2022 KojiGeneralGeneralOMC #002 Delamination repair Part1 (3)Inspection of the bonding on the
suspension interface side. All look good.
 8x 
  439   Mon Aug 15 22:49:03 2022 KojiGeneralGeneralOMC #002 Delamination repair Part1 (2)EP30-2
preparation


Two Al foil cups + A sheet
 7x 
  438   Mon Aug 15 22:43:35 2022 KojiGeneralGeneralOMC #002 Delamination repair Part1 (1)[Stephen Koji]

Checked the delamination
status:
 IMG_1926.JPGPXL_20220816_011346581.jpg 
  437   Mon Aug 15 22:06:18 2022 KojiGeneralGeneralOMC #002 new cable tie installed[Stephen Koji]

New cable ties were installed on
the cable pegs attached to the long sides
 IMG_1929.JPGIMG_1930.JPG 
  436   Mon Aug 15 21:31:56 2022 KojiGeneralGeneralOMC #002 Cable bracket replacement (6) The cable bracket was successfully
replaced.


Looking from the QPD side
 IMG_1155.JPGIMG_1149.JPGIMG_1150.JPG 
  435   Thu Aug 11 15:24:57 2022 KojiGeneralGeneralOMC #002 Cable bracket replacement (5)- The hole size extension
is going forwared now.
  
  434   Wed Aug 10 18:42:27 2022 KojiGeneralGeneralOMC #002 Cable bracket replacement (4)[Stephen Koji]

Now we got the C&Bed parts
to continue to work on the cable bracket
 PXL_20220809_235457354.jpgPXL_20220811_011910569.jpgPXL_20220811_013746139.jpg 
  433   Thu Jul 28 00:46:47 2022 KojiGeneralGeneral Subject: OMC #002 Cable bracket replacement (3)Checking the spare parts 

- Conclusion for OMC#2:
need PEEK cable
 IMG_1137.JPGIMG_1148.JPGIMG_1138.JPG 
  432   Thu Jul 28 00:28:15 2022 KojiGeneralGeneral OMC #002 Cable bracket replacement (2) Connector
unmounting

- (Attachment 1)
 IMG_1132.JPGIMG_1133.JPGIMG_1136.JPG 
  431   Wed Jul 27 23:52:18 2022 KojiGeneralGeneralOMC #002 Cable bracket replacement (1)Parts
check

- D1300052-V3 SN001 is going to
 IMG_1126.JPGIMG_1135.JPGIMG_1127.JPGIMG_1129.JPGIMG_1130.JPG 
  430   Wed Jul 27 10:34:30 2022 KojiGeneralGeneralOMC #002 Protective FirstContact PaintThe optical surfaces were coated with FirstContact
to keep them clean / somewhat protected during
the transportation.
 IMG_1125.JPG 
  429   Wed Jul 27 10:34:09 2022 KojiGeneralGeneralHigh QE PD: QE measurements 2- DLPCA-200 trans-impedance amplifier was
calibrated.
  Keithley source meter 2450
 IMG_1119.JPGIMG_1120.JPG 
  428   Wed Jul 27 10:09:51 2022 KojiGeneralGeneral4+4 wire clamp in handRegarding: D1200971

- 4 CLASS A wire clamp obtained
 PXL_20220727_072154009.jpg 
  427   Tue Jul 26 00:12:58 2022 KojiGeneralGeneralHigh QE PD: QE measurements- Installed the High QE PDs to OMC #002


B1-22@Cage B1 was
installed to the transmission DCPD
B1-23@Cage
 IMG_1118.JPG 
  426   Tue Jul 26 00:01:59 2022 KojiGeneralGeneralOMC #002 delamination check 2More epoxy delamination check:

DCPD R (Attachment 1):
Found half delaminated
 IMG_1106.JPGIMG_1107.JPGIMG_1110.JPG 
  425   Mon Jul 25 18:25:04 2022 KojiGeneralGeneralA/C Filter was replaced
New filter PN
Grainger
TK70457312T Mini-Pleat Air Filter,
  
  424   Fri Jul 22 17:47:38 2022 KojiGeneralGeneralC&B request for the reinforcement blocksOMC Reinforcement blocks

1. P/N D1600316; Version v4; Type
01; Qty 30; Source Chemistry Machine Shop
 PXL_20220722_222013127.jpg 
  423   Fri Jul 22 17:41:01 2022 KojiGeneralGeneralSRS LCR meter SRS720 returned to DownsSRS LCR meter SRS720 was returned to Downs
as before.

 
 PXL_20220723_002330805.jpg 
  422   Fri Jul 22 00:31:17 2022 KojiGeneralGeneralOMC #002 backscatter measurementMeasure the power ratio between the forward-propagating
and reverse-propagating beams.


Place a small deflecting
 OMC_backscatter.pdf 
  421   Thu Jul 21 17:47:00 2022 KojiGeneralGeneralThe profile of the beam incident on the fiber input couplerThe profile of the beam incident on the
fiber input

The fiber input was deflected by
 fiber_beam_profile.pdf 
  420   Thu Jul 21 14:55:48 2022 KojiGeneralGeneralOptics bonding for the backscatter measurementThe backscatter beam is supposed to appear
in the backpropagation path. The transmission
of the OMC has a couple of optics, it's
 IMG_1098.JPG 
  419   Thu Jul 21 14:35:35 2022 KojiGeneralGeneralBond reinforcement blocks for the invar bracketsBond reinforcement blocks for the
invar brackets:


Attachment 1:
 IMG_1095.JPGIMG_1091.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 
  417   Thu Jul 21 02:55:06 2022 KojiGeneralGeneralOMC #002 Power Budget after mirror cleaningo Power Budget after FirstContact
cleaning (2022/07/20)
NPRO ADJ -50 (min)
  
  416   Tue Jul 19 03:17:56 2022 KojiGeneralGeneralOMC #002 Power Budget before mirror cleaningo Power Budget (2022/07/18)
NPRO ADJ -50 (min)
Fiber incident 62.8mW
  
  415   Mon Jul 18 14:20:09 2022 KojiGeneralGeneralOMC #002 Plan Portal==
Initial Preparation ==


[Done] OMC #002
  
  414   Fri Jul 15 22:14:14 2022 KojiGeneralGeneralOMC Lab recovery for the OMC #002 test- The lab is chilly (18degC)

- Cleaned the lab and the optical
table a bit so that the delicate work can
 PXL_20220716_035922673.jpgPXL_20220716_025319391.MP.jpgPXL_20220716_025334324.jpgPXL_20220716_035309066.jpgPXL_20220716_035411435.NIGHT.jpg 
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