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ID Date Authordown Type Category Subject Text Attachments
  2657   Mon Aug 30 08:04:52 2021 AidanDailyProgress2um PhotodiodesMonday morning observation of JPL A1 PD cool down Attached are time series of the A1 photodiode
temperature (and megastat temperatures) along
with the PD response and reference PD measurement
 Screen_Shot_2021-08-30_at_8.04.15_AM.png 
  2658   Tue Sep 7 08:12:50 2021 AidanComputingCymacs+/-18V power supply to AI/AA chassis was actually +18V, -14.5V[Aidan]

I was working in the QIL on Friday
and I heard a clicking sound coming from
 IMG_4578.jpgIMG_4577.jpg 
  2661   Wed Sep 8 14:35:22 2021 AidanDailyProgress2um PhotodiodesRunning automated testing suite on A1 PD[Aidan]

I turned off the cryocooler and
the A1 PD is slowly coming up to room temperature
 7x 
  2662   Thu Sep 9 09:23:56 2021 AidanDailyProgress2um PhotodiodesRunning automated testing suite on A1 PDWe're at 170K as of 9AM this morning.
At the current rate, we should reach 273K
tomorrow morning. 
  
  2663   Fri Sep 10 09:11:05 2021 AidanDailyProgress2um PhotodiodesRunning automated testing suite on A1 PD9AM: At 232K this morning at 9AM. Turned
on the heater to 1W around 9:07AM to speed
up the return to room temperature. 
  
  2664   Fri Sep 10 20:13:12 2021 AidanDailyProgress2um PhotodiodesRunning automated testing suite on A1 PDI terminated the data taking around 5PM
when the photodiode was at about 4C (277K).

 
  
  2667   Wed Sep 15 08:22:32 2021 AidanDailyProgressCryo vacuum chamberCONTAMINATION: Black paint flecks throughout chamberI was setting up for some characterization
measurements of the JPL PD and I noticed
that there are flecks of black paint all
 IMG_4686.jpgIMG_4687.jpgIMG_4689.jpgIMG_4690.jpg 
  2668   Wed Sep 15 08:33:39 2021 AidanUpdate2um PhotodiodesVideo review of 2um testing setup post A1 testinghttps://dcc.ligo.org/LIGO-G2102040

 
  
  2669   Thu Sep 16 10:33:59 2021 AidanComputing2um PhotodiodesAutomation and analysis scripts for 2um data takingThe attached files are the scripts used
to take data during the PD temperature cycling/testing
and to retrieve and analyze data after the
 autorun2021.shmaximize_output_power.pyA1_analysis.py 
  2671   Wed Sep 22 16:40:19 2021 AidanLaser2um PhotodiodesBeam size measurements of the 2um beam on the PDI performed some occlusion measurements
of the 2um laser going into the cryo chamber.
For different values of dz on the collimating
 PD_measurement_layout.pngPD_occlusion_measurements.txt 
  2672   Tue Sep 28 08:23:11 2021 AidanUpdate2um PhotodiodesDistances between optics, collimating lens, focussing lens and photodiodePrecise distances required between:


fiber launcher and collimating
lens
focussing lens and beam waist 


accounting
 JPL_PD_collimating_lens_Optical_layout.pdfJPL_PD_optical_propagation_and_beam_size.pdf 
  2675   Sun Oct 3 08:22:49 2021 AidanSummary2micronLasersStarting data taking and second test of JPL PD A1
Output going to JPL_PD/data/A1_test2
and DAQ
Test commenced at 8:20AM
and cryo cooler started shortly afterwards
Once
  
  2676   Wed Oct 6 13:50:18 2021 AidanSummary2micronLasersStarting data taking and second test of JPL PD A1
Turned cryocooler off around 1317588441
(about 1:46PM)
Restarted measurement
with output going to JPL_PD/data/A1_test3
Room
  
  2677   Thu Oct 7 08:07:03 2021 AidanSummary2micronLasersStarting data taking and second test of JPL PD A1
We're at 164K as of 8AM this
morning.
  
  2678   Mon Oct 11 08:35:21 2021 AidanSummary2micronLasersStarting data taking and second test of JPL PD A1Terminated the data taking at 8:35Am this
morning. The termperature traces of the cryo
chamber show a couple of discontinuities
 Screenshot_from_2021-10-11_08-36-06.png 
  2679   Mon Oct 18 15:25:14 2021 AidanSummary2micronLasersStarting data taking and second test of JPL PD A1Initial running of analysis code puts the
max QE at ~62 + /- 1% around 130-150K. I
want to explore this temperature regime manually
  
  2682   Thu Oct 21 17:48:33 2021 AidanLaser2um PhotodiodesImproved measurement of QE on photodiodes ~89% at 140KDefinitely. I think the lack of beam profiling/imaging
equipment is something we want to address
too. We will waste a lot of time in Mariner
  
  2683   Fri Oct 22 09:20:13 2021 AidanLaser2um PhotodiodesImproved measurement of QE on photodiodes ~89% at 140KSome of the data recorded during the current/micrometer
scanning yesterday.


Distance between fiber/lens
  
  2686   Mon Oct 25 16:10:51 2021 AidanUpdateCDSRestarted computers and front-end model following campus power outage Rebooted the workstations and FB4.

 Restarted the model on the
FB4:
  
  2687   Mon Oct 25 16:13:47 2021 AidanUpdateCryo vacuum chamberHeater left on - chamber got warmThe cryocooler was switched off last Thursday
to do testing on the JPL_PD. I turned the
heater back on during this testing and neglected
 Screenshot_from_2021-10-25_16-19-39.png 
  2689   Tue Oct 26 07:32:52 2021 AidanUpdateCryo vacuum chamberHeater left on - chamber got warmWe're at 300K as of 7AM this morning.




  
  2690   Tue Oct 26 08:43:38 2021 AidanUpdateCryo vacuum chamberCTC100 temperature alarm and heater shutoffInstructions on how to enable the alarm
and heater shut off for the CTC100.

Status: This reports
 Screenshot_from_2021-10-26_08-42-57.pngIMG_5371.jpgIMG_5396.jpgIMG_5401.jpg 
  2692   Fri Nov 12 08:21:22 2021 AidanSummary2um PhotodiodesResults from JPL PD: A1-Test3[Aidan]

Here is the analyzed data from
Test 3 of the A1 JPL PD.
 A1_test3_nominal_QE.pdfA1_test3_darkcurrent.pdfA1_test3_noise_spectra_rev.pdf 
  2739   Mon Mar 28 16:09:57 2022 AidanSafetyCleanlinessLab floodingSome photos of affected areas in B265A
and B265B (elog shows some preview photos
- click on PDF for full set).
 Flood_in_sub-basement-20220328.pdf 
  2741   Tue Mar 29 09:13:20 2022 AidanSafetyCleanlinessLab floodingFacilities placed a blower and dehumidifier
in B265B. I checked the airflow and the air
around the tables is comparitively still.
 IMG_8104.jpgIMG_8103.jpgIMG_8102.jpgIMG_8101.jpgIMG_8100.jpg 
  2766   Tue May 10 14:27:26 2022 AidanLab InfrastructureCleanlinessCeiling tile replacement - Day 1Henry from the Carpentry Shop has started
replacing ceiling tiles. They need to be
cut to fit each location. There was a lot
 IMG_8782.jpg 
  2767   Wed May 11 15:53:06 2022 AidanLab InfrastructureCleanlinessCeiling tile replacement - Day 2Tiles are replaced.




 IMG_8806.jpgIMG_8807.jpgIMG_8803.jpg 
  2779   Mon Jun 6 14:05:08 2022 AidanElectronicsPurchasesReturn me to WB265B: Location of Thorlabs S130C (silicon photodiode 5mW/500mW settings)[Aidan]

I bought a new photodiode for the
West Bridge Labs. It will be housed in the
 S130C_calibration.pdfIMG_9289.jpgIMG_9287.jpg 
  1445   Fri Jul 8 12:19:46 2011 ???Mystery contributor???LaserGYRONoise in temp measurement... ??....this
looks like its all ADC noise. 
  
  939   Mon Aug 16 18:56:28 2010 1954 B-movieLab InfrastructureANTS!How do we get rid of ants?

  
  288   Thu Aug 27 21:40:20 2009 (not) AlastairLab Infrastructurestuff happensLenses


   
        
            
  
  504   Fri Dec 18 13:27:12 2009 DmassLaserDoublingConfusion Abounds ^3


   
        
            
 MZACCoupTFALL.pdf 
  505   Fri Dec 18 15:42:22 2009 DmassLaserDoublingConfusion Abounds ^3


   
        
            
  
  11   Wed Nov 28 16:20:04 2007 Andrey Lab InfrastructureGeneralEnclosure cleaningPrevious Tuesday, Nov. 20, I tried to wipe
the curtain plastic enclosure around the
optical table with the laser using methanol.
  
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