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New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Type Category Subjectup Text Attachments
  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
  
  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
  
  288   Fri Sep 8 15:14:05 2017 KojiFacilityGeneralPreparation for the plumbing work[Steve, Aaron, Koji]

We've finished the preparation
for the forthcoming plumbing work on (nominally)
 7x 
  264   Mon Aug 15 10:09:10 2016 KojiGeneralGeneralPrev H1 OMC shipped to CITPrevious H1 OMC shipped from LHO to CIT

https://ics-redux.ligo-la.caltech.edu/JIRA/browse/Shipment-8196
  
  44   Tue Dec 18 20:04:40 2012 KojiOpticsCharacterizationPrism Thickness MeasurementThe thicknesses of the prism mirrors (A1-A5)
were measured with micrometer thickness gauge.
Since the thickness of the thinner
 prism.png 
  274   Thu Jan 19 20:57:53 2017 KojiSupplyGeneralPurchaseOrdered:

Office Depot
v AA battery Qty. 24
  
  275   Thu Feb 16 17:23:12 2017 KojiSupplyGeneralPurchase
BNC Patch Panel

8x
Amphenol Connex 112443 / Isolated BNC FEMALE
TO FEMALE BULKHEAD ISOLATED ADAPTER - 50
  
  321   Thu Apr 4 20:07:39 2019 KojiSupplyGeneralPurchase== Office Depot ==
Really
Useful Box 9L x 6 (delivered)
  
  258   Tue Apr 5 18:14:55 2016 KojiGeneralLoan / LendingQPD Lending CrackleXiaoyue

QPD head
X-Z stage
  
  132   Thu May 30 15:00:28 2013 KojiOpticsGeneralQPD alignmentThe QPD alignment was adjusted using
the aligned beam to the cavity and the 4ch
transimpedance amplifier.
  
  133   Fri May 31 05:46:54 2013 KojiOpticsGeneralQPD alignmentPeter F suggested to check the bottom surface
of the PD housings if there is any protrusion/interference/whatever.
And that was true! It was found that
 QPD1.JPGQPD2.JPGQPD_calib.nb.zip 
  171   Tue Oct 15 18:50:08 2013 KojiOpticsCharacterizationQPD alignment1) Deburr the bottom surfaces of the QPD
housings
2) Aligned the QPDs
  
  115   Wed Apr 17 07:30:04 2013 KojiOpticsGeneralQPD path gluedYesterday,
all of the glass components for the QPD path
were glued.
  
  231   Mon Aug 10 02:11:47 2015 KojiElectronicsAM Stabilized EOM DriverRF AM Measurement Unit E1500151This is an entry for the work on Aug 3rd.

LIGO
DCC E1500151
 IMG_20150803_223403975.jpgIMG_20150803_221210816_HDR.jpgIMG_20150803_223420267.jpg 
  232   Mon Aug 10 11:39:40 2015 KojiElectronicsAM Stabilized EOM DriverRF AM Measurement Unit E1500151Entry for Aug 6th, 2015

I faced with difficulties to operate
the RF AM detectors.
  
  233   Mon Aug 10 11:57:17 2015 KojiElectronicsAM Stabilized EOM DriverRF AM Measurement Unit E1500151Spending some days to figure out how to
program CPLD (Xilinx CoolRunner II XC2C384).

I learned that the JTAG cable which
 screen_shot.png 
  234   Mon Aug 10 12:09:49 2015 KojiElectronicsAM Stabilized EOM DriverRF AM Measurement Unit E1500151Still suffering from a power supply
issue!

I have been tracking the issues
 IMG_20150809_215628585_HDR.jpg 
  238   Fri Aug 28 02:14:53 2015 KojiElectronicsAM Stabilized EOM DriverRF AM Measurement Unit E1500151 ~ 37MHz OCXO AM measurementIn order to check the noise level
of the RFAM detector, the power and cross
spectra for the same signal source
 OCXO_AM_noise.pdf 
  240   Tue Sep 8 10:55:31 2015 KojiElectronicsAM Stabilized EOM DriverRF AM Measurement Unit E1500151 ~ 37MHz OCXO AM measurementTest sheet: https://dcc.ligo.org/LIGO-E1400445

Test Result (S1500114): https://dcc.ligo.org/S1500114
  
  237   Fri Aug 28 01:08:14 2015 KojiElectronicsAM Stabilized EOM DriverRF AM Measurement Unit E1500151 ~ CalibrationWorked on the calibration of the
RF AM Measurement Unit. 

The calibration concept is as follows:
 RFAM_detector_calib.pdfRFAM_detector_calib_spectra.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.
  
  228   Wed Jul 22 10:15:14 2015 KojiElectronicsAM Stabilized EOM DriverRF test of the EOM/AOM Driver S15001177) Make sure the on/off RF button works,
=> OK

8) Make sure the power output doesn't
  
  229   Sat Jul 25 17:24:11 2015 KojiElectronicsAM Stabilized EOM DriverRF test of the EOM/AOM Driver S1500117(Calibration for Attachment 5 corrected
Aug 27, 2015)


Now the test procedure
 7x 
  230   Tue Jul 28 18:36:50 2015 KojiElectronicsAM Stabilized EOM DriverRF test of the EOM/AOM Driver S1500117Final Test Result of S1500117:
https://dcc.ligo.org/LIGO-S1500117


After some staring the
 IMG_20150727_214536773_HDR.jpgEOM_Driver_DAQ_TF_test.pdfEOM_Driver_Mon_PSD.pdf 
  41   Mon Nov 19 13:33:14 2012 KojiOpticsCharacterizationResuming testing mirror RoCsIn order to resume testing the curvatures
of the mirrors, the same mirror as the previous
one was tested.
 Cav_scan_response_zoom_20121016.pdf 
  22   Fri Oct 5 03:39:58 2012 KojiOpticsGeneralRoC Test setupBased on Zach's experiment design, I wrote
up a bit more detailed optical layout for
the mirror test.
 RoC_test_setup.pdfRoC_test_setup.png 
  6   Fri Jun 29 11:26:04 2012 ZachOpticsCharacterizationRoC measurement setupHere is the proposed RoC measurement
setup. Koji tells me that this is referred
to as "Anderson's method".
 RoC_measurement_setup.pngRoC_measurement_setup.graffle.zip 
  9   Sun Jul 22 15:56:53 2012 ZachOpticsCharacterizationRoC measurement setupHere is a more detailed version of
the setup, so that we can gather the parts
we will need.
 detailed_RoC_setup.pngdetailed_RoC_setup.graffle.zip 
  30   Wed Oct 17 20:36:04 2012 KojiOpticsGeneralRoC test cavity lockedThe RoC test setup has been built on
the optical table at ATF.
 detailed_RoC_setup.pdfomc_cav_lock_SCRN_SHOT.pngCav_scan_response_20121016.pdf 
  16   Mon Aug 13 16:59:11 2012 KojiCleanGeneralRoom Cleaning LogFloor wiped with a wet wiper (Aug 13, 2012)
Floor wiped with a wet wiper (Aug
15, 2012)
  
  58   Tue Jan 22 17:56:32 2013 KojiMechanicsGeneralRotary stage selectionNewport UTR80

    Sensitivity: 4 arcsec
  
  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 
  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 
  370   Mon Jul 1 12:49:42 2019 KojiOpticsCharacterizationScattering measurement of A and C mirrorsLiyuan's scattering measurement for
the A and C mirrors.
 omc_cm_tis_062419.pdfomc_prism_tis_062419.pdf 
  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 
  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%

 
  
  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 
  36   Thu Nov 8 19:47:55 2012 KojiElectronicsConfigurationSolder for PZTsRich saids:
I
  
  48   Mon Dec 31 03:10:09 2012 KojiOpticsGeneralSolidWorks model of the OMC breadboard   D1201439_aLIGO_Breadboard_layout_assy_121224.pngD1201439_aLIGO_Breadboard_layout_assy_130105.easm 
  52   Sun Jan 6 23:22:21 2013 KojiMechanicsGeneralSolidWorks model of the OMC suspension    D0900295_AdvLIGO_SUS_Output_Mode_Cleaner_Overall_Assembly.pngD0900295_AdvLIGO_SUS_Output_Mode_Cleaner_Overall_Assembly.easm 
  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)
  
  138   Wed Jun 5 18:19:51 2013 KojiGeneralGeneralSome recent photos from the OMC final test at CITApplying First Contact for the optics cleaning
  
  213   Mon Jul 21 01:02:43 2014 KojiMechanicsCharacterizationSome structual mode analysisPrisms
Fundamental: 12.3kHz Secondary: 16.9kHz
 6x 
  120   Mon May 6 19:31:51 2013 KojiOpticsCharacterizationSpot position measurement on the diode mountsMeasurement Order: DCPD2->DCPD1->QPD1->QPD2
DCPD1: 1.50mm+0.085mm => Beam
0.027mm too low
 DCPD1.pngDCPD2.pngQPD1.pngQPD2.png 
  121   Wed May 8 15:08:57 2013 KojiOpticsCharacterizationSpot position measurement on the diode mountsRemeasured the spot positions:
DCPD1: 1.50mm+0.085mm => Beam
0.084mm too high
 DCPD1.pngDCPD2.pngQPD1.pngQPD2.png 
  158   Tue Aug 27 17:02:31 2013 KojiMechanicsCharacterizationSpot position measurement on the diode mountsAfter the PZT test, the curved mirrors
were aligned to the cavity again.
In order to check the height of the
 DCPD1.png 
  180   Mon Mar 3 02:46:21 2014 KojiGeneralCharacterizationSpot positions scannedSpot positions on CM1 and CM2 scanned according
to the recipes provided by the previous entry.
The best result obtained was:
  
  168   Fri Sep 13 15:09:20 2013 KojiGeneralGeneralSprinkler installation: doneA sprinkler head was installed on the HEPA
enclosure. The head is covered with a plastic
cap.
 P9134379.jpgP9134378.jpg 
  218   Tue Sep 9 20:59:19 2014 KojiMechanicsCharacterizationStructural mode analysis for the PZT mirrorStructural analysis of the PZT mirror with
COMSOL.
Inline figures: Eigenmodes
 6x 
  315   Sat Feb 2 16:17:13 2019 KojiOpticsCharacterizationSummary: OMC(001) HOM structure recalculationEach peak of the transfer function measurement
was fitted again with a complex function:

 OMC_HOM_130531.pdfHOM_PZTV.pdfHOM_plot_PZT0_0.pdfCav_scan_response_HOM.pdf 
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