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ID Date Author Type Categorydown Subject Text Attachments
  389   Thu Feb 27 14:31:13 2020 KojiGeneralGeneralItem lendingItem lending as per Ian's request:
Particle Counter from OMC Lab to QIL

 
 P_20200227_134755_vHDR_On.jpg 
  390   Mon Aug 10 15:29:54 2020 KojiGeneralGeneralItem lendingThe particle counter came back to the OMC
lab on Aug 10, 2020

 
  
  392   Mon Aug 10 15:53:46 2020 KojiGeneralGeneralLab status checkCheck-in to the OMC lab to see the status.
Nothing seemed changed. No bug. The HEPA
is running normal. The particle level was
  
  393   Mon Sep 28 16:03:13 2020 ranaGeneralGeneralOMC Beam Dump Production Cure Bake
are there any measurements of the BRDF
of these things? I'm curious how much
light is backscattered into the incoming
  
  394   Mon Sep 28 16:13:08 2020 KojiGeneralGeneralOMC Beam Dump Production Cure BakeAccording to the past backscatter test
of the OMC (and the black glass beamdump:
not V type but triangular type on a hexagonal-mount),
  
  396   Fri Oct 9 01:01:01 2020 KojiGeneralGeneralTFT Monitor mountingTo spare some room on the optical table,
I wanted to mount the two TFT monitor units
on the HEPA enclosure frame.
 20201008214515_IMG_0152.jpg20201008214519_IMG_0153.jpg20201008214536_IMG_0154.jpg20201008220955_IMG_0155.jpg20201008221019_IMG_0156_2.jpg 
  397   Fri Oct 16 00:53:29 2020 KojiGeneralGeneralTFT Monitor mountingThe image flipping of the display unit
was fixed. The vendor told me how to fix
it.
  
  398   Fri Oct 23 19:09:54 2020 KojiGeneralGeneralParticle counter transfered to RadhikaSee this entry: https://nodus.ligo.caltech.edu:8081/40m/15642   
  399   Fri Nov 6 18:38:00 2020 KojiGeneralGeneralPowermeter lent from OMC Lab to 2um ECDLThorlabs' powermeter controler +
S401C head was lent from OMC Lab. Returned
to OMC Jul 15, 2022 KA
  
  400   Mon Nov 9 22:06:18 2020 KojiMechanicsGeneral5th OMC Transport FixtureI helped to complete the 5th OMC Transport
Fixture. It was built at the 40m clean room
and brought to the OMC lab. The fixture hardware
 IMG_0211.jpgIMG_0221.jpg 
  401   Fri Nov 20 18:51:23 2020 KojiGeneralGeneralInstrument loanFEMTO DLPCA200 low noise preamp (brand
new)

Keithley Source Meter 2450 (brand
  
  407   Fri Feb 5 07:40:37 2021 StephenSupplyGeneralOMC Unit 4 Build Machined PartsOMC Unit 4 Build Machined Parts are currently
located in Stephen's office. See image
of large blue box from office, below.
 IMG_8117.JPG 
  408   Thu May 20 17:03:50 2021 KojiGeneralGeneralSRS LCR meter SRS720 borrowed from DownsItem loan: SRS LCR meter SRS720 borrowed
from Downs. The unit is at the 40m right
now for testing with an excelitas PD. Once
 P_20210520_154841.jpg 
  409   Sun May 30 15:17:16 2021 KojiGeneralGeneralDCPD AF capacitance measirementAttachment 1: System diagram.
The reverse bias voltage is controlled by
DS335. This can produce a voltage offset
 PD_cap_meas.pdf20210529013015_IMG_0577.jpeg20210529013114_IMG_0580_2.jpeg20210529013200_IMG_0584.jpeg20210529013229_IMG_0586.jpeg 
  410   Sun May 30 15:32:56 2021 KojiGeneralGeneralDCPD AF capacitance measirementMeasurement result:

The capacitance at no bias was
460~500pF. This goes down to below 300pF
 highQEPD_capacitance.pdfC30665_capacitance.pdf 
  411   Wed Jul 7 14:21:50 2021 StephenSupplyGeneralOMC Unit 4 Build Machined PartsMore explicit insights into the inventory
for the Unit 4 build. Image of inventory
included below.
 IMG_9238.JPGIMG_9236.JPG 
  412   Thu Jun 23 21:03:33 2022 KojiFacilityGeneralMoving the small optical table to CAML (TCS Lab)I've cleared the small optical table
and wondered how to move it out of the room.
Fortunately, the north side of the big table
 PXL_20220624_035628602.jpg 
  413   Tue Jun 28 16:13:34 2022 KojiGeneralGeneralThe small optical table not small enough to get outThe table width was an inch too large compared
to the door width. We need to tilt the table
and it seemed too much for us. Let's
 IMG-5203.jpg 
  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 
  415   Mon Jul 18 14:20:09 2022 KojiGeneralGeneralOMC #002 Plan Portal==
Initial Preparation ==


[Done] OMC #002
  
  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
  
  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)
  
  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 
  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 
  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 
  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 
  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 
  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 
  425   Mon Jul 25 18:25:04 2022 KojiGeneralGeneralA/C Filter was replaced
New filter PN
Grainger
TK70457312T Mini-Pleat Air Filter,
  
  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 
  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 
  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 
  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 
  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 
  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 
  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 
  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 
  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 
  435   Thu Aug 11 15:24:57 2022 KojiGeneralGeneralOMC #002 Cable bracket replacement (4)- The hole size extension
is going forwared now.
  
  4   Wed Jun 20 20:37:45 2012 ZachOpticsConfigurationTopology / parameter selectionEDIT (ZK): All the plots here were generated  8x 
  5   Thu Jun 21 03:07:27 2012 ZachOpticsConfigurationParameter selection / mode definitionEDIT 2 (ZK): As with the   geom_bowtie.pnggeom_non-bowtie.png 
  36   Thu Nov 8 19:47:55 2012 KojiElectronicsConfigurationSolder for PZTsRich saids:
I
  
  38   Thu Nov 8 20:12:10 2012 KojiOpticsConfigurationHow many glass components we need for a plateOptical prisms 50pcs (A14+B12+C6+E18)
Curved Mirrors 25pcs (C13+D12)
  
  55   Fri Jan 18 13:25:17 2013 KojiOpticsConfigurationAutocollimator calibrationAn autocollimator (AC) should show (0,0)
if a retroreflector is placed in front of
the AC.
 autocollimator_calibration.pdf 
  63   Thu Feb 21 18:44:18 2013 KojiOpticsConfigurationPerpendicularity testPerpendicularity test of the mounting
prisms:
The perpendicularity of the prism
 perpendicularity_test.pdfP2203206.JPG 
  64   Wed Feb 27 18:18:48 2013 KojiOpticsConfigurationMore perpendicularity testMounting Prisms:
(criteria: 30arcsec = 145urad =>
0.36mm spot shift)
  
  65   Fri Mar 1 23:06:15 2013 KojiOpticsConfigurationMore perpendicularity test finalPerpendicularity of the "E" mirror
was measured.

Mounting Prisms:
  
  86   Thu Mar 28 03:37:07 2013 ZachOpticsConfigurationTest setup input optics progress[Lisa, Zach]
Last night (Tuesday), I finished
setting up and aligning most of the input
 OMC_test_setup_IO.jpg2013-03-27_05.48.20.jpg2013-03-28_02.29.36.jpg 
  87   Fri Mar 29 08:55:00 2013 ZachOpticsConfigurationBeam launched into fiber

    

       
            
  
  94   Thu Apr 4 00:35:42 2013 ZachOpticsConfigurationMMT installed on breadboard, periscope built[Koji, Zach]
 2013-04-03_23.43.00.jpg 
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