40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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ID Date Author Type Category Subjectup Text Attachments
  246   Tue Dec 15 13:39:13 2015 KojiElectronicsCharacterizationPhase noise measurement of aLIGO EOM driversThis measurement has been done on Dec 1st,
2015.


The phase noise added by
 phase_noise.pdfphase_noise_9MHz.pdf 
  13   Tue Jul 31 21:33:17 2012 KojiGeneralGeneralPlan Update: August [!]Completed work of the previous months:
[Jul]
[Aug] [Sep] [Oct] [Nov] [Dec]
  
  7   Sat Jul 14 02:16:07 2012 KojiGeneralGeneralPlan Update: JulyFacility/Supplies

    Work in progress
 P7071878.jpg 
  34   Wed Nov 7 20:44:11 2012 KojiGeneralGeneralPlan Update: November [!]Completed work of the previous months:
[Jul]
[Aug]
 OMC_Project_Schedule.pdf 
  29   Tue Oct 16 15:51:01 2012 KojiGeneralGeneralPlan Update: October [!]Completed work of the previous months:
[Jul]
[Aug]
  
  136   Mon Jun 3 21:19:03 2013 KojiGeneralGeneralPlanningMonday - Evening
(Koji)
[done] - DCPD alignment
  
  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 
  227   Wed Jul 22 09:43:01 2015 KojiElectronicsAM Stabilized EOM DriverPower supply test of the EOM/AOM DriverSerial Number of the unit: S1500117
Tester: Koji Arai
  
  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
  
  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 
  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 
  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 
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