ligo-ex ligo-ds
  Richardson Lab Experimental Log, Page 1 of 13  Not logged in ELOG logo
ID Date Author Type Category Subject
  640   Tue Sep 2 18:33:38 2025 LiuInfrastructureGeneralNew lab room 1125 layout and measurement

Action items for facilities

 

  • Ceiling lights replacement
  • Fume hood cleaned and refurbished
  • Sink countertop cleaning
  • Floor cleaned and waxed
  •  
Attachment 1: 1125.pdf
1125.pdf
  639   Tue Sep 2 12:41:33 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI design for A# with ring heater optimization
[Tyler, Liu] Ring heater optimization, continued
Attachment 1: Update.pdf
Update.pdf
  638   Tue Sep 2 12:34:02 2025 Xuesi MaUpdate Updata for self heating effect on HOM
https://docs.google.com/presentation/d/19I1fx5BLEzYb4Qnc9P4rJnYAvWI8NqE2dsj9gSPyYzg/edit?usp=sharing
  637   Tue Sep 2 11:53:34 2025 TylerUpdateTCSRIN Infrastructure Update (09/02/2025)
[Ma, Tyler]

Below are slides discussing RIN infrastructural updates related to the CyMAC.

Slides

  636   Tue Aug 26 13:09:03 2025 TylerUpdateTCSO6 RH Update
[Tyler]

Below are slides giving an update on RH O6 design progress.

Slides
  635   Tue Aug 26 12:45:41 2025 Christina, Ma, TylerUpdateCDSRIN Update
Slides
  634   Tue Aug 26 12:18:36 2025 MichaelUpdateInterferometer SimulationsSqueezing Plots for SRC Parameter Space
I've run a few plots of observed squeezing in the LIGO interferometer to fully ensure that the point we have selected is the optimal point for squeezing. Contrary to what I expected, there seems to be much more degenerate "optimal" configurations. While the toroidal case may be near optimal, it seems that the solution we found for a non astigmatic beam is not the only one. I will further explore this space to find more optimal/tolerant positions, which I see evidence of. Additionally, as observed squeezing is computational expensive to compute, I found that the difference in round-trip gouy phase accumulation between the x and y planes is a good approximation for an optimal squeezing state, which I believe makes physical sense. This may be helpful to quickly compute other optimal conditions.
Attachment 1: Screenshot_2025-08-26_at_12-16-01_LIGO_Project_Log_-_Google_Docs.png
Screenshot_2025-08-26_at_12-16-01_LIGO_Project_Log_-_Google_Docs.png
Attachment 2: Screenshot_2025-08-26_at_12-16-32_LIGO_Project_Log_-_Google_Docs.png
Screenshot_2025-08-26_at_12-16-32_LIGO_Project_Log_-_Google_Docs.png
Attachment 3: Screenshot_2025-08-26_at_12-17-26_LIGO_Project_Log_-_Google_Docs.png
Screenshot_2025-08-26_at_12-17-26_LIGO_Project_Log_-_Google_Docs.png
  633   Tue Aug 26 12:14:24 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI design for A# with ring heater optimization
Multi-ring FROSTI design for A# with ring heater optimization
Attachment 1: Update_(1).pdf
Update_(1).pdf
  632   Tue Aug 19 12:33:59 2025 PooyanUpdateTCSA# BS Update
Attachment 1: A#_beamsplitter_thermal_lensing.pdf
A#_beamsplitter_thermal_lensing.pdf
  631   Tue Aug 19 12:08:40 2025 ChristinaUpdateTCSRP Initial vs CyMAC Plot Comparisons
[Tyler, Ma, Christina]

These are the frequency averaged and veto binned plots for the initial Red Pitaya and CyMAC systems.

Attachment 1: 11hzCSD.png
11hzCSD.png
Attachment 2: 11hzstrain.png
11hzstrain.png
  630   Tue Aug 12 13:49:24 2025 MaryUpdate point absorber and coated aperture in A#
Attachment 1: Aug12.pdf
Aug12.pdf
  629   Tue Aug 12 13:46:56 2025 ChristinaUpdate  
Attachment 1: 3.png
3.png
Attachment 2: 3-1.png
3-1.png
  628   Tue Aug 12 13:32:43 2025 LiuUpdateInterferometer Simulations 
Differences in Fused Silica parameters.
Attachment 1: Screenshot_2025-08-12_at_1.31.11_PM.png
Screenshot_2025-08-12_at_1.31.11_PM.png
Attachment 2: Screenshot_2025-08-12_at_1.31.17_PM.png
Screenshot_2025-08-12_at_1.31.17_PM.png
  627   Tue Aug 12 13:28:00 2025 TylerUpdateTCSRH Fenicsx v. HV
Attachment 1: Profile_comparison.png
Profile_comparison.png
Attachment 2: 1W_diff.png
1W_diff.png
Attachment 3: 50W_diff.png
50W_diff.png
  626   Tue Aug 12 12:35:19 2025 TylerUpdate CyMAC ADC Update
[Christina, Ma, Tyler]

Updated CyMAC measurement, comparing 260 hrs of measurement time vs. 405 hrs.

Attachment 1: CSD_magnitude.png
CSD_magnitude.png
Attachment 2: chi_sq.png
chi_sq.png
  625   Tue Aug 12 12:16:21 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A#
Multi-ring FROSTI optimization for A# with static polishing
Attachment 1: Update.pdf
Update.pdf
  624   Mon Aug 11 22:19:50 2025 ChristinaUpdateTCSRed Pitaya Data Streaming

[Ma, Tyler, Christina]

This past week, we were able to set up the data streaming for continuous acquisition to the PCs, and can conduct the initial tests now. We were able to do this by:

  • Installing the correct OS ecosystems to each Red Pitaya
  • Installing the terminal streaming client
  • Debugging formatting and file saving issues by saving the data in a TDMS file on the host PC.
We have started streaming the ADC data on Monday from both boards for 2 days, which are currently in the clean room. Below are the ADC tests we performed before starting the 2-day run. (Time in ms)

Attachment 1: 3.png
3.png
Attachment 2: 3-1.png
3-1.png
  623   Wed Aug 6 16:31:37 2025 Xuesi MaUpdate  

Date and Time: Around 4:20 PM on Auguest 6, 2025

Location and Temperature:

  • Back of the room 1119, around the working station: 90.2 °F
  • Front of the room 1119, around the doorway: 85.8 °F
  • Back of the room 1129, around the working station: 93.4 °F
  • Front of the room 1119, around the doorway: 82.3 °F
  • In the hallway in front of room 1119: 77.2 °F
Attachment 1: 941.jpg
941.jpg
Attachment 2: 942.jpg
942.jpg
Attachment 3: 943.jpg
943.jpg
Attachment 4: 945.jpg
945.jpg
Attachment 5: 946.jpg
946.jpg
  622   Tue Aug 5 12:21:04 2025 LiuUpdateInterferometer SimulationsFROSTI A# optimization
A# multi-ring FROSTI optimization
Attachment 1: Update.pdf
Update.pdf
  621   Tue Aug 5 11:25:17 2025 MaryUpdate point absorber and coated aperture in A#

Simulating how point absorber defects on Advanced LIGO mirrors affect cavity performance by modeling a 4km LIGO-like arm cavity with a point absorber fixed at 5cm off-center on the ITM. In this simulation, displaced the laser beam across a 21×21 grid while calculating the deformation, then measuring the resulting power loss in the cavity (~283W circulating power).

Attachment 1: point_absorber_A#.pdf
point_absorber_A#.pdf
  620   Thu Jul 31 14:26:58 2025 Xuesi MaUpdate  

[Tyler, Ma, Christina, Maple, Cece, Mary, Pooyan, Audrey]

We started by cleaning outside of the cleanroom wiping down the cable channel and working our way down while taking the pre-cleaning measurement. We then stated wiping down the inside of clean room and vacuumed, mopped the outside of the cleanroom. Finally, we vacuumed, mopped, and wiped down the floor inside the cleanroom.

Particle Count Measurements:

  • Pre-cleaning (2:00 pm):
    • Zone 3:
      • 0.3 µm: 2707
      • 0.5 µm: 1374
      • 1.0 µm: 249
    • Zone 4:
      • 0.3 µm: 2207
      • 0.5 µm: 1166
      • 1.0 µm: 374
  • Post-cleaning (4:30 pm):
    • Zone 3:
      • 0.3 µm: 4082
      • 0.5 µm: 2415
      • 1.0 µm: 708
    • Zone 4:
      • 0.3 µm: 1707
      • 0.5 µm: 791
      • 1.0 µm: 416
Attachment 1: 2025-08-07_cleanroom_chart.png
2025-08-07_cleanroom_chart.png
  619   Tue Jul 29 12:30:00 2025 ChristinaUpdateTCS260 hour ADC update

[Ma, Christina, Tyler]

ADC CyMAC 260 hr, 8192Hz sampling rate channels V3 and Vref6

Attachment 1: CSD_06_28_25_270hr.png
CSD_06_28_25_270hr.png
  617   Tue Jul 29 11:45:19 2025 MapleUpdateTCSMeeting update
Attachment 1: Maple_TCS_update_jul_29.pdf
Maple_TCS_update_jul_29.pdf
  616   Tue Jul 29 11:27:57 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A#
Attachment 1: Update.pdf
Update.pdf
Attachment 2: scene-export-temp.html
Attachment 3: scene-export-deformation.html
  615   Tue Jul 22 12:20:29 2025 ChristinaUpdateTCS 

[Ma, Christina, Tyler]

Figure 1 shows the following PSDs for channels 0-15 from the 14 hour test. Figure 2 shows the reduced chi squared and CSD plots for both the 2 Hz and 16 Hz resolutions.

Attachment 1: PSDch0-15.png
PSDch0-15.png
Attachment 2: CSD2hz_16hz.png
CSD2hz_16hz.png
  614   Tue Jul 15 13:13:48 2025 ChristinaUpdateTCSPhotodetector optical post assembly
Attachment 1: pdreassembly.png
pdreassembly.png
  613   Tue Jul 15 11:47:53 2025 Xuesi MaInfrastructure  

Date and Time: Around 4:50 PM on July 1, 2025

Location and Temperature:

  • Back of the room 1119, around the working station: 85.7 °F
  • Front of the room 1119, around the doorway: 83.5 °F
  • Back of the room 1129, around the working station: 79.1 °F
  • In the hallway in front of room 1119: 76.5 °F
Attachment 1: 20250701_165118.jpg
20250701_165118.jpg
Attachment 2: 20250701_165200.jpg
20250701_165200.jpg
Attachment 3: 20250701_165329.jpg
20250701_165329.jpg
Attachment 4: 20250701_165246.jpg
20250701_165246.jpg
  611   Tue Jul 15 10:40:23 2025 ChristinaUpdateTCS 

[Christina, Ma, Tyler]

Yesterday, Ma and I started taking data for the PSD/CSD measurements while the photodetectors and one of the heater elements are on (8) and are using the Red Pitaya to compare it to the data we took for the same measurements on the CyMAC. It will be finished Wednesday morning, and then we plan on starting to take additional recordings in order to conduct the same type of comparison for the dark noise measurements.

Attachment 1: rpon.png
rpon.png
  610   Mon Jul 14 23:50:22 2025 TylerUpdate Cymac ADC update

I've been looking into the performances of individual channels on the Cymac by computing their individual PSDs and corresponding CSDs that show their noise relation to each other. It appears some channels do have lower noise floors than others, and some combinations of these actually do perform similar to the Red Pitaya (showing below the CSD between CHs 3 and 5), although it doesn't look like it's much of an improvement. The best method as of now still appears to be phase-locking two separate ADCs to reduce the correlated noise floor further.

This can be further discussed at the July 22, 2025 group meeting.

Attachment 1: cymac_ADC_PSDs.pdf
cymac_ADC_PSDs.pdf
Attachment 2: ch35_ADC_comps.pdf
ch35_ADC_comps.pdf
  609   Mon Jul 14 20:45:20 2025 Luke SummaryCleanroomHEPA filter performance metrics

[Luke, Luis]

We’ve been looking into methods for evaluating the performance of the HEPA filters in the clean room. Measuring flow rate appears to be a promising approach, since the filter manual specifies a recommended minimum of 70 ft/min.

At the moment, we don’t have a flow rate measurement device on hand. We're currently looking into two options:

  • A standard vane-style anemometer, which is more affordable but may lack sensitivity near the minimum required flow rate.
  • A hot-wire anemometer, which offers better resolution and accuracy at lower speeds, though it's more expensive.

In the next few days, either Luis or I will contact Terra Universal to see if they have any measurement solutions that would integrate well with our clean room setup, or if they can recommend best practices for verifying HEPA performance.

  608   Thu Jul 10 16:41:18 2025 ChristinaUpdateTCS 

[Christina, Ma, Tyler]

Pomona Box completed and is now on the server rack in 1119. Additionally, the photodetectors were connected to the box and set up in front of the heater elements.

Attachment 1: 2994921113032912040.JPG
2994921113032912040.JPG
Attachment 2: 4717009101108174053.JPG
4717009101108174053.JPG
Attachment 3: 5782646701589802125.JPG
5782646701589802125.JPG
  607   Tue Jul 8 12:15:04 2025 TylerUpdateTCSCyMAC ADC Noise Update
[Tyler, Christina, Ma, Mary]

Below is attached the ADC noise floor of two CyMAC channels vs the Red Pitaya.

The frequency resolution of these RIN spectra are 16 Hz, with N_meas = 19,308,426 for the CyMAC, and N_meas = 263,024.

Attachment 1: ADC_comps.pdf
ADC_comps.pdf
  606   Tue Jul 8 11:46:55 2025 Maple MatznerUpdateTCSUpdate on SURF progress for Jul 8
Attachment 1: Maple_TCS_update_jul_8.pdf
Maple_TCS_update_jul_8.pdf
  605   Mon Jul 7 17:44:04 2025 TylerUpdateGeneralLab Organization
[Tyler, Pooyan, Ma, Cece, Luke, Luis, Christina, Maple]

After acquiring some new equipment for the labs, a few of us spent time on Thursday and Friday sorting through everything and storing them into their appropriate places. New vacuum parts, power supplies, cables, and much more were included. The rooms are now ready for the lab tours commencing Tuesday afternoon.

Attachment 1: IMG_1874.jpg
IMG_1874.jpg
Attachment 2: IMG_1872.jpg
IMG_1872.jpg
Attachment 3: IMG_1871.jpg
IMG_1871.jpg
  604   Mon Jul 7 16:39:18 2025 ChristinaUpdateTCSPomona Box Drawings

Below are the drawings for the pomona box modifications

Attachment 1: pbdwg1.PDF
pbdwg1.PDF
Attachment 2: pbdwg2.pdf
pbdwg2.pdf
  603   Tue Jul 1 13:41:36 2025 Xuesi MaUpdate  
[Ma, Liu]

Slides

  602   Tue Jul 1 12:39:42 2025 TylerUpdateTCSA# FROSTI Profile Optimization Update
[Tyler, Liu]

Slides

  601   Tue Jul 1 11:04:00 2025 ChristinaUpdateTCSFROSTI Reconstruction II

[Ma, Tyler, Christina]

Finished external reconstruction of the FROSTI by installing all the pins to the 2 DB 25 connectors. To ensure everything was operating correctly, we did electrical testing by testing continuity and by checking each of the heater elements' RTD and power resistance values and comparing them to what was tabulated in January. Additionally, we organized the wires and added the stands.

Attachment 1: IMG_4042.png
IMG_4042.png
  600   Fri Jun 27 15:38:22 2025 ChristinaUpdateTCSFROSTI Reconstruction

[Tyler, Ma, Christina, Luke]

We threaded the wiring of the heater elements through the reflective surfaces and were able to attach each piece with the Macor spacers and connect both sides. We used the guide rails and screws to ensure proper alignment. The only necessary step left is to add the additional external screws for the reconstruction.

Attachment 1: IMG_4009.png
IMG_4009.png
  599   Wed Jun 25 15:44:47 2025 Luke UpdateCleanroomCleanroom cleaning

[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
Attachment 1: parttical_count_6-25-25.png
parttical_count_6-25-25.png
  598   Tue Jun 24 13:47:58 2025 LiuUpdateInterferometer SimulationsAlternative FROSTI A# optimization approach
Alternative FROSTI A# optimization approach
Attachment 1: Update.pdf
Update.pdf
  597   Tue Jun 24 12:45:16 2025 TylerUpdateGeneralUpdated ADC spectra
[Tyler]

Updated ADC noise spectra measurements using diaggui.

NOTE: Will update plots with proper axes

Attachment 1: csd_spec.png
csd_spec.png
Attachment 2: chi_sq.png
chi_sq.png
  596   Tue Jun 24 11:50:15 2025 Xuesi MaUpdate  
Heater Element Resistance Test Results

Heater Element Resistance Test Report

Test Overview

Conducted several on-and-off tests on heater elements at 24V, followed by switching heater elements 5 and 8 by changing their connection pins to the ADC.

Resistance Measurements (Ω)

Heater Element Before Switch After Switch Ladder Test Difference (After-Before)
Element 1 153.09577918 153.11447008 153.83373894 +0.0186909
Element 2 149.70967557 149.8175605 150.08915205 +0.10788493
Element 3 157.88314236 157.87136021 157.39696467 -0.01178215
Element 4 146.80153622 146.78826747 147.77923177 -0.01326875
Element 5 151.80888657 152.2204132 150.44919044 +0.41152663
Element 6 148.24375881 148.32846152 146.89161192 +0.08470271
Element 7 144.72286546 144.76879963 145.03627875 +0.04593417
Element 8 151.4564267 149.14240417 149.88675562 -2.31402253

Supporting Graphs

Attached below are the resistance-time graphs for all heater elements:

  • Complete test duration graph
  • Pre-switch period graph
  • Post-switch period graph
  • Resistance voltage graph after removing data from after power outage

Analysis & Conclusion

The switch did not physically change the resistance of the heater elements, suggesting the measurements reflect their true resistances.

Attachment 1: resistance_vs_time_all_channels_channel_switch.jpg
resistance_vs_time_all_channels_channel_switch.jpg
Attachment 2: resistance_vs_time_all_channels_channel_switch_one_cycle_before.jpg
resistance_vs_time_all_channels_channel_switch_one_cycle_before.jpg
Attachment 3: resistance_vs_time_all_channels_channel_switch_one_cycle_after.jpg
resistance_vs_time_all_channels_channel_switch_one_cycle_after.jpg
Attachment 4: resistance_vs_voltage.jpg
resistance_vs_voltage.jpg
  595   Tue Jun 17 12:46:47 2025 TylerUpdateElectronicsCyMAC ADC Noise
Below are results from power spectra measurements of the CyMAC ADC, computed form 30 hours of time series data, compared to the performance of the Red Pitaya. The frequency resolution for the initial Cymac CSD is 2 Hz, and 216,000 spectra measurements are averaged together. As of now, it still looks like we haven't reached the correlated noise floor of the CyMAC. We have a few days worth of data to take from, so I'll look into using a longer period of time.
Attachment 1: cymac_v_rp_csds.pdf
cymac_v_rp_csds.pdf
Attachment 2: chi_sq_cymac_v_rp.pdf
chi_sq_cymac_v_rp.pdf
  594   Tue Jun 17 12:22:43 2025 Xuesi MaUpdate  
CYMAC Remote Control Cable Documentation

CYMAC Remote Control Cable Assembly

Cable Functions

The custom cable assembly serves two primary functions:

1. Jumper Connections (DB25 Side - Connector J3)

The following pins are jumpered on the DB25 connector:

From Pin To Pin
Pin 3 Pin 16
Pin 10 Pin 11
Pin 12 Pin 24
Pin 13 Pin 25
Pin 22 Pin 23

2. Signal Wiring (DB9 to DB25)

The following connections are made between the DB9 and DB25 connectors:

DB9 Pin DB25 Pin Function
Pin 1 Pin 9 Positive side
Pin 6 Pin 12 Negative side
Pin 5 Pin 6 Ground

Note: All connections are verified with a multimeter.

Note: This cable allows remote control of the Sorensen power supply with an external voltage source (Cymac DAC).

Note: For more details, check section 2.11.1 from the attached Sorensen power supply manual.

Attachment 1: 20250616_132743.jpg
20250616_132743.jpg
Attachment 2: 20250616_132945.jpg
20250616_132945.jpg
Attachment 3: 20250616_133235.jpg
20250616_133235.jpg
Attachment 4: 20250616_180103.jpg
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Attachment 5: 20250616_180129.jpg
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Attachment 6: 20250616_180132.jpg
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Attachment 7: 20250616_180317.jpg
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Attachment 8: 20250616_181011.jpg
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Attachment 9: 20250616_181033.jpg
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Attachment 10: 20250616_181052.jpg
20250616_181052.jpg
Attachment 11: 20250616_132759.jpg
20250616_132759.jpg
Attachment 12: operating-manual-Sorensen-DCS-programmable-switching-dc-power-supplies-1kw-dcs-e.pdf
operating-manual-Sorensen-DCS-programmable-switching-dc-power-supplies-1kw-dcs-e.pdf
  593   Wed Jun 11 16:33:45 2025 PooyanUpdateComputersLuke's ray tracing hosting
  • Hosted Lukes model on Chimay. It's available at https://richardsonlab.ucr.edu/real-time-frosti
  • The sourcecode is at Github. It is clones at /var/www/html/real-time-frosti, and this is the block added to nginx config file at /etc/nginx/sites-available/default :

    location /real-time-frosti {

    root /var/www/html;
    index index.html index.htm index.php;
    }
  • Also added this line to the crontab, so the code will be checked for updated from the sourcecode every five minutes. 

    */5 * * * * cd /var/www/html/real-time-frosti/ && git pull 

  • TODO: Move the sourcecode from Github to git.ligo.org, and make the repository public. 
  592   Wed Jun 11 16:19:37 2025 PooyanUpdateCDSCDS update
  • Fast channels recorded to .gwf frame files
    • Had to add a DAQ Channels block to the c1msc model for those channel to be recorded in the .gwf frame files. The block is in the CDS_PARTS, and I just had to copy it to our model. Here is the example text for the channels:

      #DAQ Channels

      ONE_DAQ_CHANNEL 2048
      ANOTHER_DAQ_CHANNEL 1024
      SCIENCE_FRAME_CHAN* 1024
      UINT32_CHAN uint32 2048
      DAQ_CHANNEL_AT_DEFAULT_RATE

      I added two channels to the list (V0 and V1). Remember that the channel name should not be the full name, but just the part's name. In this case, I added these two channel names:

      V0_OUT
      V1_OUT

      with the default sample rate. 
  • The fast channels are recorded with an extra _DQ in their names. So, in ndscope and diaggui these two channels should be addressed as
    • C1:MSC-V0_OUT_DQ
    • C1:MSC-V1_OUT_DQ
  • Update 6/13: enabled recording of all the ADC voltage channels so that Tyler can use all the data for the noise floor calculation. attached is an example of diagggui with almost 30 hrs of data.
  • TODO: Enable daqd_wiper
Attachment 1: Screenshot_20250611_154834.png
Screenshot_20250611_154834.png
Attachment 2: f3k.pdf
f3k.pdf
  591   Tue Jun 10 12:13:00 2025 Xuesi MaUpdate  

By measuring the resistance of the ladder, I obtained a graph of resistance as a function of voltage.
All the heater elements behave consistently, showing only a small standard deviation.
However, heater element 5 shows a significantly larger standard deviation.
Upon examining the initial ladder graph, I noticed that the resistance of heater element 5 increases following a power outage that resets the system.
At this point, I am unsure why this behavior occurs.

Attachment 1: resistance_vs_voltage.pdf
resistance_vs_voltage.pdf
Attachment 2: resistance_vs_voltage_element_5.pdf
resistance_vs_voltage_element_5.pdf
Attachment 3: resistance_vs_time_all_channels_all_time_RV.pdf
resistance_vs_time_all_channels_all_time_RV.pdf
  590   Tue Jun 10 12:11:14 2025 PooyanUpdateCDSCDS update
  • The MEDM models issue was fixed. The issue was that building the c1msc model alone was not enough and we had to re-build the c1iop as well, although no changes has been made to the c1iop. Added a note in the wiki on this for future reference.
  • For writing the fast channels to the frame files, our CDS system should have a GDS broadcaster. I followed this wiki page to set one, but it breaks the current daqd system. Asked about it earlier today on the CDS Mattermost channel and waiting for a response. 
  • Maybe I should continue the distributed scheme we have been trying for the nds2-server and let another machine on the network do this. 
  • Question: daqd has a feature to zero-out the bad data (NaNs), and it is currently on for our system. I don't think that it's a good idea to have this. Should I turn it off? 
  589   Tue Jun 3 13:16:53 2025 Xuesi MaInfrastructure  

Date and Time: Around 3:50 PM on June 2, 2025

Location and Temperature:

  • Back of the room 1119, around the working station: 86 °F
  • Front of the room 1119, around the doorway: 84.1 °F
  • Back of the room 1129, around the working station: 78.6 °F
  • Front of the room 1129, around the doorway: 78.3 °F
  • In the hallway in front of room 1119: 75.2 °F
Attachment 1: 928.jpg
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929.jpg
Attachment 3: 931.jpg
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Attachment 5: 932.jpg
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