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ID Date Author Typeup Category Subject Text Attachments
  268   Fri Sep 9 14:34:31 2016 KojiGeneralGeneralItem lendingTo 40m

First Contact Kit by Calum

Class A Kapton sheets
  
  272   Wed Dec 7 21:18:35 2016 KojiGeneralGeneralOMC placed on the table / the beam roughly alignedThe OMC mode matching sled was fixed on
the nominal part of the table. Then the OMC
was located at the nominal position marked
 DSC_0082.jpgDSC_0084.jpg 
  273   Thu Dec 8 21:17:09 2016 KojiGeneralGeneralOMC placed on the table / the beam roughly alignedThe OMC cavity was locked. The alignment
was precisely adjusted. The mode matching
was optimized by the lens positions. The
  
  278   Fri May 26 21:53:20 2017 KojiGeneralConfigurationTrans RF PD setupRecent work

- DC output of the trans RF PD
was connected to the BNC patch panel. =>
  
  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
  
  284   Sat Jul 1 21:33:18 2017 KojiGeneralGeneralSome purchase notes- Forgot to close the cylinder valve...

v HEPA prefilter (20"x20"x1"
MERV 7)
  
  285   Wed Jul 5 16:59:44 2017 KojiGeneralGeneralThe OMC #002 was packed[Stephen Koji]

The OMC #002 was packed for the
transportation to Downs.
 DSC_0360.JPG 
  289   Mon Nov 27 20:24:24 2017 KojiGeneralGeneralA former LHO PD (Trans) removed from the OMC #002 for the shipment to StockholmAttachment 1: The PD was
removed from the transmission side of the
OMC #002 (former LHO OMC - the one blasted
 6x 
  290   Thu Nov 30 12:18:41 2017 StephenGeneralGeneralPreparation for Modal Testing on 4 DecemberNorna Robertson, Stephen Appert || 
29 Nov 2017, 2 pm to 4 pm  || 
227 Downs, CIT
  
  293   Thu May 3 21:45:58 2018 awadeGeneralLoan / LendingBorrowed toaster ovenI’ve borrowed the black and decker
toaster oven to dry some sonicated parts.
It is temporarly located in the QIL lab. 
 9CE80545-7A58-4236-B7E3-1EE6C4042DAA.jpeg 
  305   Wed Aug 8 17:32:56 2018 Rich AbbottGeneralCharacterizationModulation Index Test Setup at 40m LabAttached is a block diagram of the test
setup used in the 40m lab to measure the
modulation index of the IO modulator
 40mLabModIndexSetup.pdf 
  306   Thu Aug 9 11:24:29 2018 KojiGeneralCharacterizationModulation Index Test Setup at 40m Lab[Rich Koji]

The impedances of the new LLO EOM
were measured with the beat note setup at
 modulation_depth.pdfmodulation_depth_zoom.pdf 
  307   Wed Aug 29 11:06:30 2018 KojiGeneralGeneralRF AM RIN and dBc conversion0. If you have an RF signal whose waveform
is , the amplitude is constant and 1.
  
  319   Tue Mar 19 17:30:25 2019 KojiGeneralCharacterizationOMC (002) Test itemsOMC #002 Optical tests


FSR
measurement (done, 2019/1/8-9, 2019/4/1)
  
  325   Fri Apr 5 23:30:20 2019 KojiGeneralGeneralOMC (002) repair completedOMC(002)
repair completed

When the cable harness of OMC(004)
 P_20190405_222401.jpgP_20190405_222509.jpgP_20190405_222529.jpg 
  326   Wed Apr 10 19:22:24 2019 KojiGeneralGeneralOMC(004): preparation for the PZT subassembly bonding Preparation for the PZT subassembly
bonding (Section 6.2 and 7.3 of T1500060
(aLIGO OMC optical testing procedure)
  
  327   Thu Apr 11 10:54:38 2019 StephenGeneralGeneralOMC(004): preparation for the PZT subassembly bonding


Quote:


  
  330   Thu Apr 11 21:22:58 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly air baking[Stephen Koji]

The baking of the PZT subassemblies
was more complicated than we initially thought.
 temp_profile.pdfbake.xlsx 
  331   Sun Apr 14 23:58:49 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection[Koji Stephen]

(Friday afternoon) We retrieved
the PZT sub-assemblies to the clean room.
  
  332   Mon Apr 15 00:08:32 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #7)Sub-ASSY
#7

Probably the best glued unit among
 6x 
  333   Mon Apr 15 00:39:04 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #8)Sub-ASSY
#8

Probably the best glued unit among
 8x 
  334   Mon Apr 15 01:07:30 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #9)Sub-ASSY
#9

The most fractured unit among four.
 7x 
  335   Mon Apr 15 01:23:45 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #10) Sub-ASSY
#10

Attachment #1: Mounting
 IMG_7589.jpgIMG_7590.jpgIMG_7591.jpgIMG_7592.jpg 
  339   Tue Apr 16 16:40:26 2019 KojiGeneralConfigurationOMC(004): A Mirror selectionWe are going to use A5 and A14
for FM1 and FM2. (The role of these
two can be swapped)
 A_Mirror_selection.pdf 
  343   Tue Apr 16 23:11:43 2019 KojiGeneralGeneralBorrowed items from the other labsApr 16, 2019
Borrowed
two laser goggles from the 40m. (Returned
  
  344   Wed Apr 17 09:08:47 2019 StephenGeneralGeneralOMC(004): Unwrapping and preparing breadboard[Stephen, Philip, Koji, Joe]

Breadboard D1200105 SN06 was selected
as described in eLOG
 IMG_7635_packaging_of_sn06.JPGIMG_7637_engraving_of_sn06.JPGIMG_7641_particulate_before_top_gun_large_face.JPGIMG_7644_particulate_before_top_gun_small_face.JPGIMG_7646_particulate_after_top_gun.JPG 
  348   Fri Apr 19 09:35:28 2019 JoeGeneral Adjusting cavity axis, re-alignment of OMC and locking[koji,philip,
joe, liyuan,
steven]
 FSR_Scan_Fitfsrdata.pdfIMG_7679_cropped.jpg 
  351   Mon Apr 22 09:54:21 2019 JoeGeneral Shortening cavity (A5,A14,PZT11,PZT22) to get closer to design FSR[Koji,Joe,Philip,stephen]

in units 20um per div on the micrometer
[n.b. we reailised that its 10um per div
 CM1_IMG_7699.jpgCM2_IMG_7697.jpg 
  352   Mon Apr 22 19:54:28 2019 KojiGeneral OMC(004): Spot positions at the end of Apr 22nd   misalignment4.pdf 
  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
  
  377   Wed Sep 18 23:38:52 2019 StephenGeneralGeneralDirty ABO ready for PZT Subassembly BondingThe 40m Bake Lab's
Dirty ABO's OMEGA PID controller was
borrowed for another oven in the Bake Lab,
 index.png 
  379   Tue Sep 24 12:19:20 2019 StephenGeneralGeneral Dirty ABO test run prior to PZT Subassembly Bonding The 40m Bake Lab's
Dirty ABO's OMEGA PID controller was
borrowed for another oven in the Bake Lab
 image_showing_20190923_abo_qualifying_bake.png 
  380   Thu Sep 26 17:33:52 2019 StephenGeneralGeneralDirty ABO test run prior to PZT Subassembly Bonding - ABO is Ready!Follow up on OMC
elog 379

I was able to obtain the following
 image_showing_20190924_abo_qualifying_bake.png 
  382   Tue Oct 22 10:25:01 2019 StephenGeneralGeneralOMC PZT Assy #9 and #10 Production Cure Bake OMC PZT Assy Production Cure Bake (ref.
OMC
elog 381) for PZT Assy #9 and #10 started
 OMC_ABO_PZT_Curing_Bake_effort_201906_thru_201909.xlsproduction_cure_bake_pzt_assys_9_and_10_20190927.png 
  383   Tue Oct 22 11:52:53 2019 StephenGeneralGeneralEpoxy Curing Timeline of OMC PZT Assy #9 and #10This post captures the curing timeline
followed by OMC PZT Assys #9 and #10.

Source file posted in case any
 omc_elog_383_Epoxy_Curing_Timeline_of_OMC_PZT_Assy_20191022.pngomc_elog_383_Epoxy_Curing_Timeline_of_OMC_PZT_Assy.pptx 
  387   Fri Dec 13 14:59:18 2019 StephenGeneralGeneralOMC Beam Dump Production Cure Bake[Koji, Jordan, Stephen]

The beam dumps, bonded on Fri 06
Dec 2019, were placed in the newly tuned
 IMG_6080.JPGIMG_6079.JPG 
  388   Wed Dec 18 21:54:53 2019 KojiGeneralGeneralOMC Beam Dump Production Cure BakeThe beamdumps were taken out from the oven
and packed in bags.

The bottom of the V are completely
 P_20191218_160650_vHDR_On.jpegP_20191218_160705_vHDR_On.jpegP_20191218_160733_003.jpeg 
  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),
  
  395   Thu Oct 8 19:55:22 2020 KojiGeneralCharacterizationPower Measurement of Mephisto 800NE 1166AThe output of Mephisto 800NE (former TNI
laser) was measured.
The output power was measured with
 Mephisto800NE_1166A.pdf 
  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.

https://nodus.ligo.caltech.edu:8081/SUS_Lab/1856
  
  401   Fri Nov 20 18:51:23 2020 KojiGeneralGeneralInstrument loanFEMTO DLPCA200 low noise preamp (brand
new)

Keithley Source Meter 2450 (brand
  
  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 
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