[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.  

• 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.

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

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

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

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

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

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

[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

[Luke, Tyler, Cynthia, Shane, Michael]

Summary of Cleaning Activities:

We began cleaning Room 1119 at 2:00 PM.

At 2:30 PM, we moved to Room 1129 and continued cleaning.

Cleaning tasks included wiping down dust-collecting surfaces and vacuuming the floors.

Once the labs were clean, we proceeded to the cleanroom. 

• Wiping down surfaces and soft walls
• Vacuuming, mopping the floor, and finishing with IPA wipes

Particle Count Measurements:

• Pre-cleaning (2:30 PM):
  • Zone 3:
    • 0.3 µm: 973
    • 0.5 µm: 354
    • 1.0 µm: 132
  • Zone 4:
    • 0.3 µm: 486
    • 0.5 µm: 177
    • 1.0 µm: 0
• Post-cleaning (4:10 PM):
  • Zone 3:
    • 0.3 µm: 619
    • 0.5 µm: 132
    • 1.0 µm: 0
  • Zone 4:
    • 0.3 µm: 397
    • 0.5 µm: 0
    • 1.0 µm: 0

[Luke, Cece, Luis]

Particle Count Measurements:

• Pre-cleaning (12:15 PM):
  • Zone 3:
    • 0.3 µm: 1325
    • 0.5 µm: 265
    • 1.0 µm: 0
  • Zone 4:
    • 0.3 µm: 618
    • 0.5 µm: 132
    • 1.0 µm: 44

• Started Cleaning (3:20 pm)
• Finished Cleaning (4:20 pm)

• Post-cleaning (4:35 PM):
  • Zone 3:
    • 0.3 µm: 1106
    • 0.5 µm: 221
    • 1.0 µm: 0
  • Zone 4:
    • 0.3 µm: 530
    • 0.5 µm: 44
    • 1.0 µm: 0

[Luke, Mary, Luis]

Particle Count Measurements:

• Pre-cleaning (8:40 am):
  • Zone 3:
    • 0.3 µm: 441
    • 0.5 µm: 44
    • 1.0 µm: 0
  • Zone 4:
    • 0.3 µm: 353
    • 0.5 µm: 176
    • 1.0 µm: 44

• Started Cleaning (3:16 pm)
• Finished Cleaning (4:10 pm)

• Post-cleaning (4:15 pm):
  • Zone 3:
    • 0.3 µm: 574
    • 0.5 µm: 265
    • 1.0 µm: 132
  • Zone 4:
    • 0.3 µm: 177
    • 0.5 µm: 44
    • 1.0 µm: 0

[Luke, Mohak, Luis]

We were also able to remove the residue that has built up on the soft walls by donning a skinny bunny suit and with two wipes rubbing both sides of the soft walls at the same time. The wipes would get gummy very quickly and need to be replaced frequently.

Particle Count Measurements:

• Pre-cleaning (1:20 pm):
  • Zone 3:
    • 0.3 µm: 3577
    • 0.5 µm: 1369
    • 1.0 µm: 485
  • Zone 4:
    • 0.3 µm: 1062
    • 0.5 µm: 442
    • 1.0 µm: 177

• Started Cleaning (3:00 pm)
• Finished Cleaning (4:00 pm)

• Post-cleaning (4:22 pm):
  • Zone 3:
    • 0.3 µm: 3577
    • 0.5 µm: 618
    • 1.0 µm: 132
  • Zone 4:
    • 0.3 µm: 2031
    • 0.5 µm: 397
    • 1.0 µm: 132

[Luke, Luis, Tyler, Ma, Christina, Maple]

We started by cleaning outside of the cleanroom wiping down the cable channel and working our way down. We replaced the air filter in the HEPA filter with what seemed to be the last one in storage. We then vacuumed outside, before wiping down the inside of the cleanroom. We then vacuumed, mopped, and wiped down the floor inside the cleanroom.

We are ready for venting the vacuum chamber which is planned to take place 6/26/25 at 10am. 

Particle Count Measurements:

• Pre-cleaning (12:00 pm):
  • Zone 3:
    • 0.3 µm: 2517
    • 0.5 µm: 662
    • 1.0 µm: 176
  • Zone 4:
    • 0.3 µm: 177
    • 0.5 µm: 44
    • 1.0 µm: 0

• Post-cleaning (1:45 pm):
  • Zone 3:
    • 0.3 µm: 619
    • 0.5 µm: 88
    • 1.0 µm: 0
  • Zone 4:
    • 0.3 µm: 177
    • 0.5 µm: 88
    • 1.0 µm: 0

Date and Time: Around 2:20 PM on May 21, 2025

Location and Temperature:

• Back of the room, around the working station: 85.5 °F
• Front of the room, around the doorway: 82.3 °F

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

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

• 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.

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

[Luke, Luis]

We couldn't access the bake log on the wiki. (see attached) So we looked in the documentation provided on the DCC to find at what temperature to bake the Viton O-rings. We found that we should bake Viton at 180°C for 24 hours. 

So we sonic-washed the O-rings, dried them, and then put them in the oven set to the following:

100°C in 15 minutes

100°C for 30 minutes

180°C in 30 minutes

180°C for 24 hours

30°C in 2 hours

Other things of note:

We refilled the water container as it was running out.

The nitrogen used to dry the clean and baked objects is now critically low.

The helium used in leak testing is also quite low (~400 psi).

Regarding the vacuum chamber:

I reattached the pressure gauges to the chamber and gave them about an hour to stabilize. They read out main 8.7e-9, RGA 2.6e-9. Please note these pressures should lower more as we only stopped baking on Saturday afternoon. 

[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.

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.

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