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  265   Mon Nov 13 11:23:54 2023 Jon UpdateCDSCyMAC testing

[Jon, Shane, Luis]

My repair of the internal ribbon connecting the ADC to the adapter board resolved the timing signal problem. After this repair, we were able to start the front-end IOP model and checked out the RTS diagnostic screens (pictured below). All indicator lights were green except for the DK flag (indicating the DAC outputs are not enabled) and the DAQ flag (indicating that the system is recording data to disk). Those were both as expected, because the DAQD data acquisition service was not set up yet and the DAC outputs are not enabled until at least one user model (which outputs signals to the DAC) is started. I created and installed a simple user model (C1MSC) and confirmed that the DK flag clears once this model starts.

I later attempted to set up the DAQD service, which is needed to save data, but am yet to successfully debug it. I have received some guidance from one of LIGO's CDS experts and will try it at my next opportunity for lab work.

  254   Thu Nov 2 17:14:36 2023 Shane, Jon UpdateCDSCyMAC set up permanentized
CyMAC connections have been finalized and made permanent. Also tested voltages, which are all looking good.

Warning: power is on. Do not touch power supply terminals or screws connected to grounding cables (see attached images 4 and 5; green wires on back of power supply with black and yellow covers, and exposed positive and negative terminals on back of power supply).

 Also established connections from Anti-Aliasing chassis to ADC adapter board, Anti-Imaging chassis to DAC adapter board, and binary in/out chassis to BIO card, all mounted within Cymac host computer. Turned on CyMAC and ran test model, received error message likely pointing to timing signal not being successfully passed to the adapter boards. Next steps are checking to make sure correct timing signal is actually being output, and then checking internal ribbon cable in host chassis, which is another potential cause of the error.
  250   Mon Oct 30 18:15:13 2023 ShaneUpdateCDSCyMAC chassis mounted and progress on power connections
All CyMAC chassis mounted in electronics rack today, and shelf for monitor also mounted. Images attached. Assembled grounding cables for power connections, and attached the timing chassis to power & gnd. Powered on successfully with correct voltages in expected places. After power test, everything was turned off and unplugged. Next steps: attach grounding cables to other four power supply chassis. Also attach anti-aliasing, anti-imaging, binary input and binary output chassis to power supply.
  Draft   Tue Oct 1 19:41:23 2024 ShaneUpdateCDSCyMAC Timing Chassis Issue
[Shane, Luis] Summary of the issue we've been having with the timing chassis: when we connect only the Valon 5015 to power, the timing signal comes out of it sinusoidal as expected and the status lights are steady and all looks good. As soon as we connect the 3010 to power, the signal (both coming out of the 5015 and coming out of the 3010) go flat and the status lights of the 5015 start to flicker. We think what may be going on is that the 5015 is drawing just enough power to survive on its own, but when the current gets split to go to the 3010 as well, the 5015 takes more than it needs and becomes overpowered, and thus no longer outputs anything. We want to test further by powering them with two separate power supplies, but we need another one of the power connectors for the 3010 (the only one we have branches out from the connector to the 5015 and we don't want to cut any of the wires). Images of the inside of the chassis, along with two roughly sketched circuit diagrams (one showing the current setup, in which they're powered by the same source, and one showing a possible test set up, in which they're powered separately.
  252   Wed Nov 1 18:24:01 2023 ShaneUpdateCDSCyMAC Power connections made
Finished power connections today for the CyMAC chassis. Images attached. Had to switch the shrink fork terminals on the power supply cables to shrink ring terminals, but was able to get everything connected and secured. Upcoming work: turning on power supply and testing voltages/checking everything is turning on and lighting up correctly. Configuration is as follows:
  • Topmost Sorensen: +24V (reserved for FROSTI)
    • Positive terminal:
      • unconnected for now
    • Negative terminal: [negative terminal is grounded]
      • jumper to Sorensen ground screw
  • Sorensen 2nd from the top: +18V
    • Positive terminal:
      • white power cable wire for AA chassis
      • white power cable wire for AI chassis
      • white power cable wire for BI chassis
      • white power cable wire for BO chassis
    • Negative terminal: [negative terminal is grounded]
      • jumper to Sorensen ground screw
      • black power cable wire for AA chassis
      • black power cable wire for AI chassis
      • black power cable wire for BI chassis
      • black power cable wire for BO chassis
  • Sorensen 3rd from the top: -18V
    • Positive terminal:[positive terminal is grounded]
      • jumper to Sorensen ground screw
      • green power cable wire for BI chassis
      • green power cable wire for BO chassis
    • Negative terminal:
      • green power cable wire for AA chassis
      • green power cable wire for AI chassis
  • Bottommost Sorensen: +6V
    • Positive terminal:
      • white power cabe wire for timing chassis
    • Negative terminal: [negative terminal is grounded]
      • jumper to Sorensen ground screw
      • green power cable wire for timing chassis
      • black power cable wire for timing chassis
  2   Thu Jun 2 16:14:58 2022 JonHowToGeneralCustom conda environment on JupyterHub

Cross-linking instructions: How to run a Jupyter notebook in your custom Conda environment

  374   Mon Jun 3 14:59:44 2024 CynthiaUpdateInterferometer SimulationsCreated cavity scan with LG modes
  141   Mon Jul 3 14:32:24 2023 CaoInfrastructureVACCooling down vacuum chamber
[Cao]

After leaving the the chamber to bake at 120 deg C from Thursday 3:41 pm. Today I started to cool the chamber down to room temperature at 11:30 am (total bake duration: 91 hours 49 minutes). Ideally, this process should be ramped down slowly, approx. 6 degree per hour. However we had no ramping function with out controller. The only method to tune this cool/ heat rate is to tune the PID parameters, which are:

  1. Pb : Proportional band, this quantity is inversely proportional to the P-gain
  2. ti : Integral time. Increasing integral time makes the output response slower to error, thus the opposite effect of increasing integration gain
  3. td : Differential time
Since the differential term doesn't contribute to rise time significantly, we neglect it for now and first change Pb and ti . The factory default settings :
  1. Pb : 50
  2. ti : 100 s
  3. td : 25 s
Initially Ichanged Pb from 50 to 200 (max) and ti to 999 s (max) but there is a large offset error. Currently, Pb and ti are sitting on the following settings:
  1. Pb : 200
  2. ti : 800 s

At this setting it takes 25-30 mins to drop 6 degrees, which is not as slow as we want but we will have to tune our PID more carefully. At the first stage, I dropped the temperature to 60 deg C. After 3 hours, we dropped the setpoint to 25 degrees and let the vacuum chamber to cool to room temperature.
  8   Fri Jul 22 13:20:28 2022 PhoebeUpdate Comsol
I will be using comsol until 1:30 pm today. I will be updating the model for the heater mount to be thicker in certain areas, so that it can feasibly be 3D printed. Specifically, the radius of the center cartridge mount has been increased to add thickness to the pipe and the arms of the bridge. This will allow us to print with a much smaller chance for error, as the printer can print objects with a minimum length of 1 mm.
  382   Mon Jun 24 21:38:25 2024 PooyanInfrastructureComputersComputer server changes in 1119 and 1129

[Jon, Pooyan, Tyler]

 

A few computer machine changes have been made. 

 

  • Logrus moved from 1119 to 1129. It is up and running with the same IP address as before. 
  • A new Windows machine (host name: spica, IP:192.168.1.14) is installed in the 1119 server rack. It is connected to the RGA scanner with the serial port and is specifically used for that purpose. 
    • Update: The machine was off on 6/25, although it was left on 6/24. We think that it might have been because of Windows' default setting to suspend/hibernate the machine after idleness. To resolve this, I used  "powercfg /change" command to set all the following parameters equal to zero. The machine is still running on 6/26. 

    monitor-timeout-ac
    monitor-timeout-dc
    disk-timeout-ac
    disk-timeout-dc
    standby-timeout-ac
    standby-timeout-dc
    hibernate-timeout-ac
    hibernate-timeout-dc

  • A new Debian machine (hostname: megatron, IP:192.168.1.16) is installed in the 1129 server rack. This machine is intended to be used for FEA/simulation work. A new 2TB WD Green SSD is used as its main disk drive. 

     At the moment, “controls” is the only user, and there are no apps/libraries installed on the machine.

    • Update: Jon installed LIGO cds-workstation tools and MiniConda on 6/26. 
    • Update: Pooyan and Liu set the following conda environments:
      • Env named “finesse” with Python 3.12.3 and Finesse version 3.0a24 installed. Finesse was installed via the source code. The subdirectory “/home/controls/packages” is used to store the package sourcecodes.
      • Env named “fenicsx” with the same version of Python and Finesse as the previous env, with the latest version of FEniCSx (0.8) and the test-mass-thermal-state installed.  
  132   Fri Jun 23 15:47:06 2023 PamellaUpdateFLIRCollecting data - Moving horizontal and vertical on screen.
[Pamella]
  • 02:09 pm: Turned on the device (current on)
  • 02:42 pm: Started taking snap on position one (Reference point: 0,-0.062). Parameters:0.10A,1.5V,41.5C
  • I took multiplier snap on the same position for compare after on data analyzes. I just wanted one/two minute break between the snaps. I did that same for every position.
  • 02:55 pm: Started taking snap on position two (Reference point:-0.10,-0.062 ). Parameters: 0.10A,1.5v,43 C
  • 03:01 pm: Started taking snap on position three (Reference point:0.05 ,-0.062). Parameters: 0.1A,1.4V,42.8C
  • 03:07 pm: Started taking snap on position four (Reference point: 0.05,0.045). Parameters:0.10A,1.5V,43.6 C
  • 03:15 pm: Started taking snap on position five (Reference point: 0,0.045). Parameters:0.10A, 1.4V, 44.1C
  • 03:22 pm: Started taking snap on position six (Reference point: 0,0.045). Parameters: 0.10A,1.4V,43.3 C
  • We can see in the photos attached below than have some differences between every position so I should be starting analyzes on that.
  241   Fri Oct 20 16:38:02 2023 Shane, AidenUpdateCleanroomCleanrooom cleaning and particle count
[Aiden, Shane]

cleaning cleanroom and particle count

  • 3:16 pm: started particle count.

    NOTE: we are not within the ISO class 5 standard for any size ranges in zone 3. ~6000 above limit in 0.3 u, ~2000 above in 0.5, ~200 above in 1.0
    • zone 3:
      • 0.3 u: 16,711
      • 0.5 u: 5612
      • 1.0 u: 1039
    • zone 4:
      • 0.3 u: 6817
      • 0.5 u: 2369
      • 1.0 u: 249
  • 3:35 pm: began surface check and wipedown, including softwalls
  • 3:50 pm: started vacuuming the floor
  • 4:00 pm: finished vacuuming the floor
  • 4:01 pm: started mopping the floor
  • 4:06 pm: finished mopping the floor
  • 4:07 pm: started cleaning the buckets
  • 4:08 pm: started mopping with IPA wipes
  • 4:14 pm: finished mopping with IPA wipes
  • 4:15 pm: changed sticky floor mats
  • 4:18 pm: started particle count
    • zone 3:
      • 0.3 u: 23,113
      • 0.5 u: 9686
      • 1.0 u: 1371
    • zone 4:
      • 0.3 u: 7191
      • 0.5 u: 2951
      • 1.0 u: 290
  45   Mon Mar 6 18:48:43 2023 PamellaUpdateGeneralCleanroom update
Today Pamella and Julian finished cleaning of the new lab cabinets. Also we wiped the computer and put inside the cleanroom so now the computer is not move out side anymore. We saw some dirty parts in the cleanroom floor again and is possible for the next step we should be clearing the floor one more time. Possible is necessary order more IPA wipes for keep cleaning in nexts weeks. A photos of the cabinets and the computer are attached below.
  93   Mon May 8 12:00:03 2023 Pamella, Shane, JulianUpdateGeneralCleanroom particle counts and cleaning the cleanroom.
[Pamella,Julian, Shane]
    Today we cleaned the clean-room (floor, surfaces) and particle count.
    10:00 am: Started particle count.
  • Zone 3:
  • 0.3u: 1330
  • 0.5u: 540
  • 1.0u: 415
  • Zone 4:
  • 0.3u: 290
  • 0.5u: 83
  • 1.0u: 0
    Clean-room:
  • 10:30 am: Started wiping down the surfaces inside the clean-room
  • 10:41 am: Finished wiping down the surfaces inside the clean-room and Started vacuuming the clean-room.
  • 10:58 am: Finished vacuuming the clean-room.
  • 11:00 am: Started mopping on the floor.
  • 11:20 am: Finished mopping on the floor and started wiping on the floor.
  • 11:34 am: Finished wiping on the floor.
  • 11:35 am: Started the particle count.
  • 11:57 am: Finished the particle count.
  • Zone 3
  • 0.3u: 997
  • 0.5u: 290
  • 1.0u: 207
  • Zone 4
  • 0.3u: 374
  • 0.5u: 207
  • 1.0u: 207
  268   Thu Nov 16 17:12:42 2023 Luis, Shane, MohakUpdateCleanroomCleanroom cleaning and particle count
[Shane, Luis, Mohak]

cleaning cleanroom and particle count

  • 3:37 pm: started particle count
    • zone 3:
      • 0.3 u: 1205
      • 0.5 u: 748
      • 1.0 u: 249
    • zone 4:
      • 0.3 u: 1496
      • 0.5 u: 748
      • 1.0 u: 290
  • 3:57 pm: began surface check and wipedown, including softwalls. NOTE: vacuum chamber insulation crumbling at edges, dropping loose flakes. Scatters residue whenever jostled, so wiping it down just releases more. Not enough flakes are being released for it to be a major issue, but definitely something to keep an eye on.
  • 4:18 pm: started vacuuming the floor
  • 4:29 pm: finished vacuuming the floor
  • 4:30 pm: started mopping the floor
  • 4:35 pm: finished mopping the floor
  • 4:36 pm: started cleaning the buckets
  • 4:41 pm: started mopping with IPA wipes
  • 4:52 pm: finished mopping with IPA wipes
  • 4:52 pm: changed sticky floor mats
  • 4:53 pm: started particle count
    • zone 3:
      • 0.3 u: 3367
      • 0.5 u: 1787
      • 1.0 u: 914
    • zone 4:
      • 0.3 u: 1039
      • 0.5 u: 498
      • 1.0 u: 249
  362   Wed Apr 17 15:07:04 2024 ShaneUpdateCleanroomCleanroom cleaning and particle count
[Mohak, Luke, Luis, Shane, Cynthia, Michael, Xuesi]

cleaning cleanroom and particle count

    NOTE: particle counter was found dead, with the charging dock unplugged. For future reference, if you need to unplug the dock, please either plug it back in when you're done, or make a note in an elog so someone else can come down and charge it.

  • 1:07 pm: ran zero count test on particle counter
  • 1:26 pm: started particle count
    • zone 3:
      • 0.3 u:1787
      • 0.5 u:457
      • 1.0 u:41
    • zone 4: We were only able to charge the particle counter a small amount before starting the cleaning, so it died again halfway through this measurement, and we didn't get results for zone 4. In interest of time, we just put it on the charger and started the cleaning.
    • 1:49 pm: began surface check and wipedown, including softwalls
    • 2:16 pm: started vacuuming the floor
    • 2:24 pm: finished vacuuming the floor
    • 2:26 pm: started mopping the floor
    • 2:32 pm: finished mopping the floor
    • 2:32 pm: started cleaning the buckets
    • 2:35 pm: started mopping with IPA wipes
    • 2:43 pm: finished mopping with IPA wipes
    • 2:43 pm: changed sticky floor mats
    • 2:45 pm: started particle count
      • zone 3:
        • 0.3 u: 1288
        • 0.5 u: 124
        • 1.0 u: 0
      • zone 4:
        • 0.3 u: 415
        • 0.5 u: 290
        • 1.0 u: 0
  369   Thu May 16 15:23:14 2024 ShaneUpdateCleanroomCleanroom cleaning and particle count
[Luis, Michael, Luke, Shane]

cleaning cleanroom and particle count

  • 1:45 pm: ran zero count test on particle counter
  • 1:50 pm: started particle count
    • zone 3:
      • 0.3 u: 2660
      • 0.5 u: 332
      • 1.0 u: 41
    • zone 4:
      • 0.3 u: 8106
      • 0.5 u: 2494
      • 1.0 u: 831
  • 2:08 pm: began surface check and wipedown, including softwalls
  • 2:22 pm: started vacuuming the floor
  • 2:39 pm: finished vacuuming the floor
  • 2:43 pm: started mopping the floor
  • 2:53 pm: finished mopping the floor
  • 2:54 pm: started cleaning the buckets
  • 2:59 pm: started mopping with IPA wipes
  • 3:06 pm: finished mopping with IPA wipes
  • 3:10 pm: changed sticky floor mats
  • 3:06 pm: started particle count
    • zone 3:
      • 0.3 u: 1496
      • 0.5 u: 83
      • 1.0 u: 0
    • zone 4:
      • 0.3 u: 789
      • 0.5 u: 83
      • 1.0 u: 41
  456   Thu Oct 3 19:35:04 2024 ShaneUpdateCleanroomCleanroom cleaning and particle count
[Luke, Michael, Cynthia, Mary]

cleaning cleanroom and particle count

  • 12:25 pm: started particle count
    • zone 3:
      • 0.3 u: 4614
      • 0.5 u: 872
      • 1.0 u:83
    • zone 4:
      • 0.3 u: 2411
      • 0.5 u: 415
      • 1.0 u: 83
  • 12:48 pm: began surface check and wipedown, including softwalls
  • 1:20 pm: started vacuuming the floor
  • 1:30 pm: finished vacuuming the floor
  • 1:34 pm: started mopping the floor
  • 1:40 pm: finished mopping the floor
  • 1:40 pm: started cleaning the buckets
  • 1:42 pm: started mopping with IPA wipes
  • 1:50 pm: finished mopping with IPA wipes
  • 1:51 pm: changed sticky floor mats
  • 3:44 pm: started particle count
    • zone 3:
      • 0.3 u: 3207
      • 0.5 u: 624
      • 1.0 u: 83
    • zone 4:
      • 0.3 u: 916
      • 0.5 u: 83
      • 1.0 u: 0
  472   Thu Nov 14 10:46:20 2024 Luke SummaryCleanroomCleanroom cleaning

 

[Luke, Luis, Michael]

cleaning cleanroom and particle count

  • 8:30 am: started particle count
    • zone 3:
      • 0.3 u: 1195
      • 0.5 u: 177
      • 1.0 u: 132
    • zone 4:
      • 0.3 u: 619
      • 0.5 u: 0
      • 1.0 u: 0
  • 9:00 am: began surface check and wipedown, including softwalls
  • 9:35 am: started vacuuming the floor
  • 9:43 am: finished vacuuming the floor
  • 9:45 am: started mopping the floor
  • 9:55 am: finished mopping the floor
  • 9:56 am: started cleaning the buckets
  • 10:00 am: started mopping with IPA wipes
  • 10:05 am: finished mopping with IPA wipes
  • 10:20m: started particle count
    • zone 3:
      • 0.3 u: 2213
      • 0.5 u: 398
      • 1.0 u: 0
    • zone 4:
      • 0.3 u: 1150
      • 0.5 u: 177
      • 1.0 u: 44
  15   Wed Jan 18 22:06:05 2023 JulianUpdateELOGCleanroom Update
I wiped down all the inner walls of the cleanroom using alcohol wipes, as per Cao's instruction.
  22   Mon Feb 6 20:02:32 2023 JulianUpdateGeneralCleanroom Update
I wiped down the main table (including frame, legs, and transparent shelf) and workbench using alcohol wipes. Once I cleaned all of the surfaces, I used the Hepa vacuum to pick up any fallen debris.
  41   Thu Mar 2 20:53:56 2023 JulianUpdateGeneralCleanroom Update
Today Pamella and Julian began the final cleaning of the cleanroom, starting with the HEPA vacuuming and mopping then wiping down every surface of the laser table. We wiped the main tabletop as well as the legs, but we were unable to completely wipe down the upper frame of the table before we had to leave. For next steps, Julian will come in on Friday and finish cleaning the frame, then both of us will come in on Monday to finish the final cleaning.
  43   Sat Mar 4 00:34:46 2023 JulianUpdateGeneralCleanroom Update
Today I was able to finish cleaning the frame of the laser table, and for good measure I wiped down the tabletop and exterior of the vacuum chamber when I was finished. I was also able to go through and wipe down the bags containing the vacuum parts as well as the tabletop of the workbench.
  55   Thu Mar 23 18:40:08 2023 JulianUpdateGeneralCleanroom Update
Today Pamella and I came in to Hepa vacuum and mop the floor of the cleanroom for general maintenance.
  100   Wed May 17 12:18:08 2023 Pamella, Julian and Shane UpdateGeneralCleaning room and particle count
[Pamella, Julian and Shane]
    Particle count:
  • 10 am: Started particle count
    1. Zone 3 :
      • 0.3u: 1288
      • 0.5u: 332
      • 1.0u: 124
    2. Zone 4 :
      • 0.3u: 498
      • 0.5u: 166
      • 1.0u: 83
  • 10:40 am: Checked the surfaces inside the cleanroom.
  • 10:50 am: Started vacuuming the cleanroom.
  • 11:15 am: Started mopping the cleanroom.
  • 11:35 am: Started wiping the cleanroom floor.
  • 11:40 am: Finished cleaning the cleanroom.
  • 11:41 am: Started the particle count.
  • 12:17 am: Finished the particle count.
    1. Zone 3 :
      • 0.3u: 3782
      • 0.5u: 706
      • 1.0u: 207
    2. Zone 4 :
      • 0.3u: 374
      • 0.5u: 83
      • 1.0u: 83
  109   Wed May 31 11:42:16 2023 Pamella, Julian and ShaneUpdateGeneralCleaning room and particle count
[Pamella, Shane and Julian]
    Cleaning room and particle count
  • 09:58 am: Started the particle count
    1. Zone 3:
    2. 0.3u : 1,995
    3. 0.5u : 540
    4. 1.0u : 0
    5. Zone 4:
    6. 0.3u : 124
    7. 0.5u : 0
    8. 1.0u : 0
  • 10:25 am: Started checking the surfaces inside the cleanroom.
  • 10:30 am: Started vacuuming the floor.
  • 10:45 am: Finished vacuuming the floor.
  • 10:46 am: Started mopping the floor.
  • 10:58 am: Finished mopping the floor.
  • 11:00 am: Started wiping floor with polypropylene wipes.
  • 11:03 am: Started and finished cleaning the mop buckets.
  • 11:15 am: Finished wiping floor with polypropylene wipes.
  • 11:16 am: Changed sticky floor mats.
  • 11:20 am: Started the particle count.
    1. Zone 3:
    2. 0.3u : 2,951
    3. 0.5u : 872
    4. 1.0u : 207
    5. Zone 4:
    6. 0.3u : 374
    7. 0.5u : 83
    8. 1.0u : 0
  76   Fri Apr 21 16:51:26 2023 PamellaUpdateGeneralCleaning cables.
Cables for the vacuum system.
  • Today i wiped, bagged and tagged two cables for the vacuum system. I used IPA wipes for cleaning this two split power cord. I attached a image below.
  131   Thu Jun 22 13:58:00 2023 Pamella, Julian and ShaneUpdateCleanroomCleaning and Particle Count
[Pamella, Shane, and Julian]
    cleaning cleanroom and particle count
  • 12:00 pm: started particle count
    • Zone 3
      • 0.3u: 3533
      • 0.5u: 540
      • 1.0u: 166
    • Zone 4
      • 0.3u: 290
      • 0.5u: 124
      • 1.0u: 41
  • 12:31 pm: Started checking the surface inside the cleanroom and began surface wipedown
  • 12:50 pm: started vacuuming the floor
  • 1:05 pm: Finished vacuuming floor
  • 1:09 pm: Started mopping the floor
  • 1:21 pm: Finished mopping the floor
  • 1:22 pm: Started cleaning the baskets
  • 1:25 pm: Started mopping with IPA wipes
  • 1:39 pm: Finished mopping with IPA wipes
  • 1:41 pm: Changed sticky floor mats
  • 1:45 pm: Started particle count
    • Zone 3
      • 0.3u: 2327
      • 0.5u: 581
      • 1.0u: 207
    • Zone 4
      • 0.3u: 1662
      • 0.5u: 374
      • 1.0u: 290
  66   Fri Apr 7 09:48:09 2023 PamellaUpdateGeneralClean the system parts
Pamella and Julian wiped and tag system parts for the vacuum machine. We used isopropyl and vectra wipes in the most import pieces: Inverted magnetron pirani gauge and the air cooling kit 81. The other parts we uses the IPA wipe for cleaning. So for now we finished with ever system parts which was in the gabinetes. I put photos below. The photos is for all part we cleaning, tag and which puted inside the cleaning room.
  54   Wed Mar 22 15:25:00 2023 ShaneUpdateGeneralClean room recertification particle counts
Attached are the five zone particle measurements for the clean room now that the fan speeds have been set to MEDIUM. 2 min sample time, 3 samples per zone. The occupied clean room measurements were unusual in that they generally got larger towards minute 6 instead of settling and going to zero, and for this reason didn't stay beneath the class 5 requirement at the end of the samples. The unoccupied counts look more similar to what was expected, and generally settle under the class five requirement.
  32   Thu Feb 23 13:32:55 2023 ShaneUpdateGeneralClean room floor particle counts
Here are the counts from the clean room floor today. The counts should be dated- the ones from today (2/23/23) are the last 8 in the chart. The first set of 2 measurements from today were under the table by the clean room entrance, the next two were under the table by the vacuum chamber, the next two were on the floor by the vacuum chamber lid, and the last two were on top of the table for comparison. All measurements were taken using 2 minute sample time.
  49   Thu Mar 9 13:51:42 2023 ShaneUpdateGeneralClean room counts 3/9/23
Here's the clean room counts from this morning. Also attached is rough diagram of where the five zones are in the clean room. Counts taken with 2 minute sample time, three samples in each zone.
  294   Sun Dec 17 21:04:15 2023 JonInfrastructureClean & BakeClean and bake lab migrated to 1129

[Jon, Tyler, Aiden, Luke]

On Friday we completed assembly of the new stainless steel-topped benches in 1129. We then moved the clean and bake equipment from 1119 to its new larger space in 1129. This included the HEPA flow bench, ultrasonic washer, deionized water drum, nitrogen tanks, and forced-convection oven. The oven was re-anchored to the wall with earthquake restraints in its new location.

The power cords still need to be permanently routed, but the new clean and bake lab is otherwise ready for use.

  297   Wed Dec 20 10:33:34 2023 JonInfrastructureClean & BakeClean and bake lab migrated to 1129

Update: I have completed permanent routing of the electrical cables. I also ran the ultrasonic washer's drain line to the sink drain (the current hose does reach). The new clean and bake lab is now fully operational.

Quote:

[Jon, Tyler, Aiden, Luke]

On Friday we completed assembly of the new stainless steel-topped benches in 1129. We then moved the clean and bake equipment from 1119 to its new larger space in 1129. This included the HEPA flow bench, ultrasonic washer, deionized water drum, nitrogen tanks, and forced-convection oven. The oven was re-anchored to the wall with earthquake restraints in its new location.

The power cords still need to be permanently routed, but the new clean and bake lab is otherwise ready for use.

 

  59   Fri Mar 31 14:23:13 2023 PamellaUpdateGeneralClean and bake batch 11
Today I bagged and tagged batch 11. I wiped the some tools: Centering ring alum( 2 pieces), reversible ratcheting, gasket removal (CF). After wiped that I bagged and tagged this parts and put inside the cleanroom. Also I wiped one power cable (3 meters), bagged and tagged that and inside the cleanroom. I put photo below.
  52   Fri Mar 17 19:46:39 2023 AidenSummaryGeneralClean and Bake batch 9
Bagged and Tagged the reflector arms and bases and placed them inside the clean room. Total of 2 bags used. Cleaned and Baked parts in batch 9 on the spread sheet and used the following procedure; 1. Ramp to 100 degC in 15 min. 2. Dwell at 100 degC for 30 min. 3. Ramp to 200 degC in 30 min. 4. Dwell at 200 degC for 48 hours. 5. OFF Also soaked the 2.75" CF gate valve in acetone to try and clean the open threads around the part. Then cleaned it in the ultrasonic washer with liquinox for 20 minutes (10 minutes each side). It looks better than it used to but the threads still seem to be the problem and will probably need even further cleaning.
  51   Tue Mar 14 18:21:41 2023 AidenSummaryGeneralClean and Bake batch 8
Starting off Peter and I refilled the deionized water barrel. Then Aiden Cleaned and Bake the FROSTI arms and bases in liquinox for 5 minutes. Then placed them in the oven where they will undergo the following steps; 1. Ramp to 100 degC in 15 min. 2. Dwell at 100 degC for 30 min. 3. Ramp to 120 degC in 30 min. 4. Dwell at 120 degC for 48 hours. 5. OFF Also cleaned the 2.75 MDC Gate valve for 20 minutes (10 minutes each side) in liquinox. It looks significantly cleaner in areas I could not reach before. However some areas like the flat bottom threaded holes are still very dirty. I also made sure to dry it thoroughly and wrapped it in UHV foil until I further cleaning is decided.
  47   Wed Mar 8 19:29:00 2023 AidenSummaryGeneralClean and Bake batch 7
Today gave another cleaning to the MDC gate valve. It is still very dirty an will need more cleaning. I also cleaned the other 3 valves and the argon leak. These are also in bags inside the clean room. I cleaned them by hand with IPA wipes and had to specifically give the MDC up to air valve a harder clean with acetone as it was not getting clean with the IPA. This valve still has a ring around the face as shown in the first image. Be very cautious when moving the parts in the large ESD bag, it may be heavy and the parts will move inside.
  38   Tue Feb 28 19:37:22 2023 AidenSummaryGeneralClean and Bake batch 5
Bagged and Tagged batch 4 parts by placing no more than two part numbers per bag and taped them with kapton tape and labeled them with their name and part number. Then placed them in the clean room on the work bench. Cleaned batch 5 part (Viton O-Ring) with liquinox and placed the into the oven for 5 steps; 1. Ramp to 100 degC in 15 minutes. 2. Dwell at 100 degC for 30 minutes. 3. Ramp to 180 degC in 30 minutes. 4. Dwell at 180 degC for 48 hours. 5. Turn off and cool down to room temperature. To see the specific parts in batch 5 please refer to the Clean and Bake spread sheet on the Richardson lab page: https://docs.google.com/spreadsheets/d/19gnv1q9l64gxnq76KfcXizbqShJfK0ayn2Js1SiAZok/edit#gid=1765414234 Hand cleaned stainless steel containers and silver coated screws. Designated each container with its contents with the label maker and placed inside the clean room. Should be noted that the fasteners were very clean before the hand cleaning and showed not dirt on the wipes. Added these parts to the clean and bake data base sheet and designated the type of cleaning as "rough cleaning". Gabriella helped with this cleaning and today was her first day in the lab.
  31   Tue Feb 21 17:51:04 2023 AidenSummaryGeneralClean and Bake batch 4
Bagged and Tagged batch 3 parts by placing no more than two part numbers per bag and taped them with kapton tape and labeled them with their name and part number. Then placed them in the clean room on the work bench. Cleaned batch 4 parts with liquinox and placed the into the oven for 5 steps; 1. Ramp to 100 degC in 15 minutes. 2. Dwell at 100 degC for 30 minutes. 3. Ramp to 200 degC in 30 minutes. 4. Dwell at 200 degC for 48 hours. 5. Turn off and cool down to room temperature. To see the specific parts in batch 4 please refer to the Clean and Bake spread sheet on the Richardson lab page: https://docs.google.com/spreadsheets/d/19gnv1q9l64gxnq76KfcXizbqShJfK0ayn2Js1SiAZok/edit#gid=1765414234
  30   Fri Feb 17 19:12:39 2023 AidenUpdateGeneralClean and Bake batch 3
Bagged and Tagged batch 2 parts by placing no more than two parts per ESD bag then taped them with kapton tape and tagged them with their name and part number. Than placed them inside the clean room on the work bench. Total of 3 Bags used. For Batch 3- Cleaned all copper gaskets with liquinox for 10 minutes, dried them off with nitrogen, then placed into oven where the are currently undergoing the following steps; 1. Ramp to 100 deg C in 15 minutes. 2. Dwell at 100 degC for 30 minutes. 3. Ramp to 175 degC in 30 minutes. 4. Dwell at 175 degC for 24 hours. 5. Turn off and cool down to room temperature. To see the specific parts in batches 2 and 3 refer to the clean and bake data sheet. https://docs.google.com/spreadsheets/d/19gnv1q9l64gxnq76KfcXizbqShJfK0ayn2Js1SiAZok/edit?skip_itp2_check=true#gid=1549161924
  29   Mon Feb 13 18:57:53 2023 AidenSummaryGeneralClean and Bake batch 2
Cleaned second batch of SS parts with liquinox for 20 min. Then put in oven for 5 steps; 1. Ramp, 100 degC, 15 min 2. Const, 100 degC, 30 min 3. Ramp, 200 degC, 30 min 4. Const, 200 degC, 48 hours 5. Ramp, 25 degC, (off).
  146   Wed Jul 5 16:02:12 2023 AidenUpdateClean & BakeClean and Bake batch 14 Bagging
Bagged and Tagged the 2.75" copper gaskets from Batch 14 and placed them into the clean room on the work bench.
  72   Mon Apr 17 17:06:49 2023 AidenSummaryGeneralClean and Bake batch 11
Cleaned the Viton O-Ring for the main chamber in Liquinox for 10 minutes. Then put it in the oven to back for; 1. Ramp to 100 degC in 15 min. 2. Dwell at 100 degC for 30 min. 3. Ramp to 180 degC in 30 min. 4. Dwell at 180 degC for 24 hours. 5. Off Note: There were three viton -rings in the bag sent to us. I cleaned and baked 2 of them and left the third in the bag.
  57   Fri Mar 24 13:36:17 2023 PamellaUpdateGeneralClean and Bake batch 10
Today I bagged and tagged batch 10. I wiped the RGA vacuum component for around 25 minutes after that I bagged and tagged this part and put inside the cleanroom. The RGA vacuum component have a big size and because off that i used the big bag. I wiped one power cable (2 meters), bagged and tagged that and inside the cleanroom. For the parts in the oven, a bunch of screws, I bagged and tagged the screws and put inside the cleanroom. I put photos below about this process.
  86   Fri Apr 28 19:39:19 2023 CaoSummaryGeneralClean and Bake Leybold TTR 91 Pirani Gauge

Quote:
I took batch 12 out of the oven and put them in a bag and placed the bag inside the clean room in the first large stainless steel container. I also looked at the small gauge that we felt like needed to be baked and I can confirm that without further cleaning around the inside of the gauge it should not be connected to the main vacuum. I have attached a photo of the inside of the gauge.

 

Following the problem with contamination particles observed in the the Leybold thermovac TTR 91, we have taken the following step to clean the gauge:

  1. Wipe with IPA-wetted Vectra Alpha: Cover the tip of a ziptide with Vectra Alpha wipe corner that has been wetted with IPA, push the wipe around and remove visible particulates
  2. Fill the gauge flange with IPA: (following Jon's recommendation to use Lesker's procedure for cleaning their Pirani gauge), flip the gauge up such that the CF flange points upward, fill the flange with IPA all the way up. Use the tip of a SSTL tweezer to agitate the IPA. Let it sits for 20 minutes, agitate every 5 minutes. After 20 minutes, pour the IPA out then spray with dry pure nitrogen
  3. Passive drying : Let the gauge sit inside the flowbench for 3 hours (3:30 pm to 6:30 pm)to ensure all IPA has evaporated
  4. Baking : Leave the gauge in oven at 50 degree C for 48 hours (maximum allowed temperature is 65 deg C, we use 50 deg C to ensure we are well below this limit). Baking started at 7pm, should finish on Sunday 7pm and ready for assembling to vacuum chamber on Monday morning

  42   Fri Mar 3 19:13:33 2023 AidenSummaryGeneralClean and Bake Batch 6
Started to clean the dirtiest of the valves. I could not finish but I definitely made good progress on it. The MDC valve is very dirty and there are many places I could not reach with my fingers. I used Acetone and IPA for this first round of cleaning on it. I also was going to bag the viton O-Ring from the previous Batch, however it seems to have broken during the bake and I am leaving it inside the oven for now.
  279   Mon Nov 27 19:34:50 2023 AidenUpdateClean & BakeClean and Bake Batch 20 Bagging
Bagged and tagged bath 20 which included the macor hardware and place it inside the clean room on the table.
  272   Mon Nov 20 20:37:45 2023 AidenUpdateVACClean and Bake Batch 20
[Aiden, Luis] Started to clean and bake the macor parts for the FROSTI reflector. Per LIGO documentation cleaned the macor in liquinox for 10 minutes and put them in the oven at 200 degC for 24 hours.
  237   Mon Oct 9 21:41:24 2023 AidenUpdateClean & BakeClean and Bake Batch 19
Bagged and tagged the parts from batch 18. Started the Copper batch that includes all the gaskets needed to start the vacuum chamber upgrade.
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