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ID Datedown Author Type Category Subject Text Attachments
  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 
  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 
  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.
  
  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 
  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 
  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 
  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
  
  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
  
  226   Tue Jul 21 20:20:12 2015 KojiGeneralGeneralItem lendingKate (ATF)

- 4ch color oscilloscope (Tektronix)

- Chopper controller
  
  225   Sat Jul 18 11:37:21 2015 KojiElectronicsAM Stabilized EOM DriverD0900848 power board ~ oscillation issue solvedPower Supply Board D0900848 was
oscillating. Here is the procedure how the
issue was fixed.
 6x 
  224   Wed Jul 15 22:23:17 2015 KojiElectronicsAM Stabilized EOM DriverE1400445 first lookThis is not an OMC related and even not
happening in the OMC lab (happening at the
40m), but I needed somewhere to elog...
 IMG_20150714_195534852.jpgIMG_20150714_195227746_HDR.jpg 
  223   Wed Feb 18 21:51:23 2015 KojiGeneralGeneralNotes on OMC Transportation Fixtures & PelicanLLO has one empty OMC transportation fixture.

LHO has one empty OMC transportation
fixture.
  
  222   Wed Feb 4 20:07:24 2015 KojiGeneralGeneralItem lendingShipment to MIT (L. Barsotti, J. Miller)

1. UV Illuminator (LESCO Super
Spot MK III)
 C30140_1.JPGC30140_2.JPGC30141.JPGC30142.JPGC30143.JPG 
  221   Tue Feb 3 18:23:49 2015 KojiGeneralGeneralItem lending- The laser was removed and shipped to
LHO today.

- UV illuminator / fused silica
  
  220   Fri Jan 30 19:31:08 2015 KojiGeneralGeneralItem lendingGabriele:

PZT HV Amp

Evan:
  
  219   Sat Jan 17 11:40:04 2015 KojiGeneralGeneral3rd OMC completedJan 15, 2015 3rd OMC completed

The face caps of the DCPD/QPD cables
were installed (Helicoils inserted)
  
  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 
  217   Wed Aug 27 23:13:13 2014 KojiOpticsCharacterizationCollection of the power budgetting infoL1
OMC Cavity power budget
H1
  
  216   Tue Aug 5 13:03:25 2014 KojiGeneralGeneralMissing cable componentsDCPD Connector Face: Qty2 https://dcc.ligo.org/LIGO-D1201276
QPD Connector Face: Qty2 https://dcc.ligo.org/LIGO-D1201282
PD faster: 92210A07 Qty 4: MCMASTER
  
  215   Mon Aug 4 18:59:50 2014 KojiGeneralGeneralA memorandomOn breadboarfd cabling for 3IFO OMC
D1300371 - S1301806
D1300372 - S1301808
  
  214   Thu Jul 31 15:07:53 2014 KojiGeneralGeneralItem lendingTara: Laser Safety goggle ->
Returned

Evan:
  
  213   Mon Jul 21 01:02:43 2014 KojiMechanicsCharacterizationSome structual mode analysisPrisms
Fundamental: 12.3kHz Secondary: 16.9kHz
 6x 
  212   Sun Jul 20 17:20:39 2014 KojiGeneralGeneralThe 3rd (LIO) OMC was shipped out to LHO The 3rd (LIO) OMC was shipped out to LHO
on Friday (Jul 18) Morning.
At LHO
  
  211   Sun Jul 20 17:19:50 2014 KojiMechanicsCharacterizationI1OMC vibration test ~ 2nd roundImproved
vibration measurement of the OMC
Improvement
 9x 
  210   Thu Jul 17 02:19:20 2014 KojiMechanicsCharacterizationI1OMC vibration testSummary
- The breadboard has a resonance
at 1.2kHz. The resonant freq may be chagned
 6x 
  209   Tue Jul 15 03:34:16 2014 KojiOpticsCharacterizationOMC backscatter measurementBackscatter
measurement ~ 2nd round


Summary
 OMC_backscatter.pdfOMC_backscatter.png 
  208   Tue Jul 15 03:00:42 2014 KojiOpticsCharacterizationOMC backscatter measurementPresence of the misaligned SRM (T=20%)
was forgotten in the previous entry.
This effectively reduces the OMC reflectivity
  
  207   Sun Jul 13 17:46:28 2014 KojiOpticsCharacterizationOMC backscatter measurementBackscattering
reflectivity of the 3rdOMC was measured.

Attached: Measurement setup
 OMC_backscatter.pdf 
  206   Fri Jul 11 00:06:33 2014 KojiOpticsCharacterizationI1OMC PDDCPD#            
DCPD1      DCPD2
Housing#         
  
  205   Thu Jul 10 23:22:28 2014 KojiOpticsCharacterizationI1OMC QPDQPD#             
QPD1      
QPD2
  
  204   Thu Jul 10 08:34:57 2014 KojiGeneralGeneralTo DoOptical tests

    Cleaning

   Power Budget
  
  203   Thu Jul 10 01:39:38 2014 KojiElectronicsGeneralPZT wireRich came to the OMC lab. Pins for the
mighty mouse connector were crimped on the
4 PZT wires.
 P7096669.JPG 
  202   Tue Jul 8 18:54:54 2014 KojiMechanicsCharacterizationPZT characterizationEach PZT was swept with 0-150V 11Hz triangular
wave.
Time series data for 0.2sec was recorded
 PZT_Scan.pdfI1OMC_PZT_Response.pdf 
  201   Tue Jul 8 04:08:06 2014 KojiGeneralGeneralExpoxy reapplication for beam dumpsFirstly, the excess epoxy was removed using
a cleaned razor balde
  
  200   Mon Jul 7 01:36:03 2014 KojiGeneralGeneralTo DoOptical tests

    Cleaning

   Power Budget
  
  199   Sun Jul 6 08:31:14 2014 KojiOpticsCharacterizationHOM measurement with PZT vol swept3rd OMC, HOM diagram at PZT1=0V and PZT2=50V.
First coincidence with the carrier
is the 32nd-order carrier mode. Very good.
 HOM_plot.pdf 
  198   Sun Jul 6 03:56:40 2014 KojiOpticsCharacterizationHOM measurement with PZT vol sweptCavity FSR/TMS measurement (2014/7/5) with
PZT voltages swept from 0V to 200V (50V step)
 Cav_scan_response_PZT1.pdfCav_scan_response_PZT2.pdfOMC_HOM_140705.pdf 
  197   Sun Jul 6 02:46:20 2014 KojiOpticsCharacterizationOMC power budget3rd OMC power budget (2014/7/2)
Input power: 34.8mW
  
  196   Sun Jul 6 02:45:56 2014 KojiOpticsGeneralFSR Measurement3rd OMC FSR / Finesse measurement
RF AM was injected by detuning a
HWP.
 finesse_measurements_log.pdf 
  195   Thu Jul 3 17:45:18 2014 KojiGeneralGeneralBeam dump delaminationHere is the resolution.
I'll apply fillets of EP30-2 along
the edges of the black glass (See figure).
 beamdump_delamination_solution.png 
  194   Wed Jul 2 18:58:42 2014 KojiGeneralGeneralBeam dump delaminationWhile the OMC breadboard was being inspected,
it was found that two out of five black-glass
beam dumps showed sign of delamination.
 beamdump_delamination.png 
  193   Wed Jul 2 16:41:43 2014 KojiGeneralGeneralOMC bakingOMC is back from the oven today.
To Do:
Optical tests
  
  192   Fri Jun 27 18:51:33 2014 KojiGeneralGeneralSupplyPTOUCH TAPE (12mm white) x 2
9V batteries
  
  191   Fri Jun 27 12:29:50 2014 KojiGeneralGeneralOMC bakingThe OMC went into the oven at around 2PM
on Thursday. It will be baked at 80degC for
48 hours.
 P6266536.jpg 
  190   Tue Jun 24 18:43:15 2014 KojiGeneralGeneralICS entries for the OMC baking/assemblyFor baking:

    Assembly Name aLIGO Output
Mode Cleaner
  
  189   Mon Jun 23 21:54:16 2014 KojiOpticsGeneralAll of the gluing completedThe bottom-side templates were removed.
The last beam dump was removed
TODO
  
  188   Fri Jun 20 18:59:12 2014 KojiOpticsGeneralAll of the invar blocks have been gluedAll of the INVAR blocks have been glued.
I found thinner shims in the stock.
On Monday, the template will be removed.
  
  187   Thu Jun 19 23:16:50 2014 KojiOpticsGeneralAll of the prisms have been glued- All of the PRISM mirrors have been glued
- 4 out of 5 beam dumps have been
glued
 P6196525.JPG 
  186   Sat May 17 07:40:14 2014 KojiOpticsCharacterizationI1OMC cavity mirrors gluedI1OMC cavity mirrors were glued.
FSR = 264.82MHz => Lcav = 1.132m
(nominal 1.132m)
 Cav_scan_response_140516_Pitch.pdfCav_scan_response_140516_Yaw.pdf 
  185   Fri May 16 00:13:36 2014 KojiOpticsCharacterizationCavity mirror gluing part 1BS1/FM1/FM2 for I1OMC were glued.
FM1 had to be intentionally rotated.
FM1 had to be intentionally shifted
  
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