 Mon Nov 28 18:10:23 2022, shane, Update, ELOG, Particle counts in the clean room 
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Particle count stats for the clean room Nov 28, 2022:
Took 10 sample runs in each of 5 regions in the clean room (5 runs per region with a person inside
the clean room for the measurement, and 5 runs per region without anyone in the clean room for the measurement), for a total of 50 samples taken. Sample
time was 60 seconds. Overall clean room average particle count for the size ranges are as follows:
0.3 micrometers- 3405.76 (room occupied), 974.92 (room |
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Fri Feb 3 13:04:04 2023, shane, Summary, General, clean room particle counts 1/25/23
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| Clean room count graphs for each zone (as of January 25, 2023) attached |
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Wed Apr 12 16:17:50 2023, shane, Update, General, Particle Counter moved
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With the added height of the new docking station, the particle counter no longer fits under the Windows monitor in the electronics rack and has been moved
to the desk in the corner of the lab. |
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Fri Jul 28 13:39:39 2023, shane, Update, Cleanroom, full 5 zone cleanroom particle count
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| Here's the 5 zone cleanroom measurement from today. |
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Mon Aug 7 13:58:46 2023, shane, Update, CDS, internal power supply cables done for AI chassis
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Finished assembling and installing the aLigo chassis internal power supply cables in the anti-imaging chassis today. Tested for continuity and everything
looked good. Chassis lid still secured with two temporary screws because I'm not sure what the correct size is. |
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Thu Nov 9 19:06:46 2023, shane, Update, Cleanroom, 5 zone cleanroom measurement
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Here's today's five zone measurement, taken ~5 hours after the cleaning. Zone 5 (closest to fire cabinet and back wall) is a bit over the limit in all size
ranges (about 1500 particles in 1.0u size range over), and zone 2 is slightly over the limit in the 1.0u range, but everything else is under the requirement.
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Fri Nov 10 14:16:04 2023, shane, Update, Cleanroom, new cleanroom zone diagram
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since the vac system has been moved and made permanent, here's a new diagram of the cleanroom zones. The zones themselves haven't moved, but the diagram
has been updated to reflect the new set up of the cleanroom. |
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Thu Jan 18 18:06:49 2024, shane, Update, Cleanroom, cleanroom 5 zone particle count measurement
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| Here's today's full five zone measurement of the cleanroom |
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Fri Feb 2 19:18:24 2024, shane, Update, Cleanroom, cleanroom cleaning and particle count
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[Aiden, Shane, Luis, Luke]
cleaning cleanroom and particle count
5:10 pm: ran zero count test on particle counter
5:14 pm: started particle count
NOTE: initial counts
are significantly above allowed limit. ~10 times larger than ISO class 5 standard in the smallest size range. Realized partway through ceiling tile changes |
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Wed Feb 7 12:43:22 2024, shane, Update, Cleanroom, cleanroom particle counts (full 5 zone measurement)
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| Here's today's full 5 zone measurement of the cleanroom. Everything is back under the requirement. |
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Tue May 7 20:34:31 2024, shane, Update, CDS, frosti MEDM screen update
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[Luis, Shane]
Here is the updated MEDM screen, with new orientation and updated labeling to reflect the actual positions of the heater elements. Note that
indices start at T0 to be consistent with simulink model, though in the previous elog for the FROSTI layout the heater elements are labeled 1-8.
Also,
we finally learned how to take a screenshot on debian. |
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Tue Jan 28 13:30:46 2025, shane, Update, CDS, Serial comms testing update
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Attempted to communicate with the smaller vac pump (TwissTor 74) via Agilent software today. Was able to communicate with the pump via python serial connection
code as usual, with no issues. When using the manufacturer software though, it was unable to 'locate' the pump and failed to connect to it. So manufacturer
software works for the big (older) pump, but not the smaller, newer one. Unclear if this is somehow related to the fact that using the manufacturer software |
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Thu Apr 3 13:23:37 2025, shane, Update, CDS, UPS interfacing
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Update on UPS serial interfacing: the driver for the UPS webcard has been installed on spica (for UPS1 in room 1119) and logrus (for UPS2 in room 1129).
Static IP addresses have been assigned for both and noted on the lab wiki. Neither is yet able to connect, as the initial ip address webpage connection
test failed for both. In the process of troubleshooting now. |
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Wed Oct 2 10:31:46 2024, Xuesi Ma, Configuration, , Group Meeting Slides 10/2/2024
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Group Meeting slides for Non-deterministic Heater Response.
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Tue Oct 15 15:27:38 2024, Xuesi Ma, Update, ELOG, Timing Chassis Update 12x
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I conducted separate tests on the '5015' and '3010a'. When powered individually, the '5015' outputs a signal at 33.55 MHz with an amplitude of 608
mV. It draws 1 A of current from the power source. The input signal for the '3010a' is 33.54 MHz with an amplitude of 670 mV (peak-to-peak) and a 15 mV
DC offset. The output signal from channel 1 is a 65.5 kHz square wave with an amplitude of 3.28 V. The '3010a' draws 0.1 A of current.
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Mon Jan 27 11:29:38 2025, Xuesi Ma, Update, , Heater Element Test
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[Ma, Cece, Luke, Mary, Shane]
On Friday (Jan 24), we installed the heater elements on the stand. The heater elements are arranged from 1 to 8, oriented from right to left
as shown in Attachment 1. Each wire has been labeled according to its corresponding element number and type (e.g., RTD connections, heater connections). |
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Mon Jan 27 23:35:28 2025, Xuesi Ma, Update, ,
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[Ma]
Installed all the pins to the peek DB 25 connectors |
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Fri Jan 31 15:03:09 2025, Xuesi Ma, Update, , Heater Element Circuit Check
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table {
width: 100%;
border-collapse: collapse; /* Merges borders into a single line */
}
th,
td {
border: 1px solid #ddd; /* Adds a 1px solid border */
padding: 8px;
text-align: left;
}
th
{
background-color: #f2f2f2; /* Adds a light gray background to headers */
}
[Ma] Wed 1/29/2025 |
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Mon Feb 3 13:17:21 2025, Xuesi Ma, Update, ,
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[Ma]
changed all zip ties to peek zip ties, and grouped wires together. The setup is ready to go into the chamber. |
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Tue Feb 18 10:01:07 2025, Xuesi Ma, Update, ,
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[Ma, Pooyan, Tyler]
On Friday, we connected the vacuum chamber with the Cymac. |
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Tue Feb 18 10:02:16 2025, Xuesi Ma, Update, , Group Meeting Slides 2/18/2025
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| https://docs.google.com/presentation/d/1WiV2VqS0BzXNCK6VYYQ-Ty8xlHnzXatQaFbMf1-0rsY/edit?usp=sharing |
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Tue Feb 25 10:02:32 2025, Xuesi Ma, Update, ,
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1424039912.625576 2025/02/19 22:38:14 UTC Time start
24V 2.8A right after start all 8 elements
1424044804.902443 2025/02/19 23:59:46 UTC Time stop |
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Tue Mar 4 03:05:42 2025, Xuesi Ma, Update, ELOG, LOG
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1424564097.243212 2025/02/26 00:14:39 UTC Time start
12V 2A right after start all 8 elements
1424564478.079428 2025/02/26 00:21:00 UTC Time stop |
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Tue Mar 4 03:33:18 2025, Xuesi Ma, Update, , Update 6x
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Spikes Appear Again, need to address it systematically.
Power on and off before reaching steady state ✔
At 12V, the rise and fall time of heater elements are different from 24V. |
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Tue Mar 11 10:43:57 2025, Xuesi Ma, Update, ,
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Continue investigation in the spikes
Pulsed ADC with a function generator and find no spikes. Rules out ADC for causing the spikes
Loopback test that bypasses the FROSTI Chassis shows spikes (spikes happened on all channels at the same time) |
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Mon Mar 31 15:41:56 2025, Xuesi Ma, Update, ,
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The result from AI Chassis bypass test showed that the AI Chassis may be the problem. There are no spikes from DAC's direct output.
All chassis except timing chassis are turned off. Power supplies for 24V, 18V, and -18V are turned off
The AI chassis has been taken out of the rack for further inspection |
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Mon Apr 7 13:28:49 2025, Xuesi Ma, Update, ,
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Test 1: Adapter Board Connected to Filter Board
Setup: AI Chassis is powered on. Signal is measured directly from
the adapter board. All other ports on the adapter board are connected to the filter board.
Observation: Two distinct spikes
observed at the beginning of the measurement.
Test 2: Adapter Board Disconnected from Filter Board
Setup: |
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Tue Apr 15 11:13:43 2025, Xuesi Ma, Update, ,
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Test 4: AI Chassis ground isolation
Setup: AI Chassis isolated from the ground with readout directly connected to
adapter board
Observation: No spike observed.
Test 5: Ribbon cable check
Setup:
AI Chassis remains isolated from the ground. The signal is measured after the ribbon cable. (Attachment 3)
Observation: No |
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Tue Apr 22 12:08:46 2025, Xuesi Ma, Update, ,
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Test 7: Reconnect ribbon cables
Setup: Reconnect all the ribbon cables, and turned on the AI Chassis while isolated
rack
Observation: No spike observed.
Test 8: Reconnect to rack
Setup:
Reconnect the AI Chassis to the rack.
Observation: No spike observed.
Test 9: Restore to original position.
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Wed Apr 30 17:33:14 2025, Xuesi Ma, Update, VAC, Started bake
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[Luke, Ma, Tyler]
The vacuum chamber is currently baking.
Current state as of 5:00 |
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Fri May 2 12:34:02 2025, Xuesi Ma, Update, VAC, Stopped bake
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The vacuum chamber has stopped baking.
Current state as of 12:30, 5/2/2025:
The gate valve is open, and the filament of the RGA is on. |
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Tue May 6 13:19:31 2025, Xuesi Ma, Update, ,
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Tue May 13 12:35:01 2025, Xuesi Ma, Update, ,
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Thu May 15 12:03:41 2025, Xuesi Ma, Infrastructure, Electronics, Notice
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All Sorensen power supplies are turned off. The Cymac system is down (All Chassis are down)
If you need more information or if you need to turn them back on please contact Xuesi Ma. |
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Mon May 19 10:59:14 2025, Xuesi Ma, Infrastructure, ,
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Status Update
Previous Status:
All Sorensen power supplies were turned off. The Cymac system was down (all chassis were offline).
If you need more information or assistance in turning them back on, please contact Xuesi Ma.
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Wed May 21 14:40:38 2025, Xuesi Ma, Infrastructure, Cleanroom, Cleanroom Temperature
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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
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Tue May 27 12:52:22 2025, Xuesi Ma, Update, , 6x
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Using the configuration in section 2.11.1 in the Sorensen installation and operation manual (attached below), I'm able to remote control the Sorensen
power supply.
I use DAC VEXC8 as the external voltage source and a breakout board to match the configuration of connector J3. |
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Tue Jun 3 13:08:47 2025, Xuesi Ma, Update, ,
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We currently have the parts for a DB9 connector but need parts for a DB25 connector, where did we get the parts for the DB9 connector? We may be able
to use the same company for the DB25 connector.
Also need a cable for the connectors. Find a DB9 to DB9 cable in 1129, not sure if I can disassemble it and use just the cable. |
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Tue Jun 3 13:16:53 2025, Xuesi Ma, Infrastructure, ,
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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 |
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Tue Jun 10 12:13:00 2025, Xuesi Ma, Update, ,
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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. |
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Tue Jun 17 12:22:43 2025, Xuesi Ma, Update, , 11x
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CYMAC
Remote Control Cable Documentation
.connector {
background-color: #f8f9fa;
border-left: 4px solid
#3498db;
padding: 10px 15px;
margin: 15px 0;
}
.pin-table {
width: 100%;
border-collapse: |
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Tue Jun 24 11:50:15 2025, Xuesi Ma, Update, ,
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Heater
Element Resistance Test Results
.heater-test-container {
font-family: Arial, sans-serif;
line-height:
1.6;
max-width: 800px;
margin: 20px auto;
padding: 20px;
color: #333;
}
.heater-test-container |
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Tue Jul 1 13:41:36 2025, Xuesi Ma, Update, ,
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[Ma, Liu]
Slides |
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Fri Jun 28 10:43:13 2024, Xuejun, Update, Cleanroom, Frosti
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[Xuejun, Tyler]
We moved Frosti into the cleanroom and debugged it to make sure everything was working. One of the DB25 pins broke off at the connector
for element 1 so it needed to be recrimped. Element 6 short circuited but fixed with adjustment to the heater power pin position. We connected the power
and sensor connectors to the power box and recalibrated the RTD sensors.
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Mon Jul 8 10:39:14 2024, Xuejun, Update, FLIR, Average Temperature Profile
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After taking data for each of the individual heater elements, I imported them into python and overlayed them to produce an average temperature profile.
I rotated the 7 of the elements to align with element 1's profile and averaged them out. By setting the range to 28C - 33C (this gave the best visibility
of the heating pattern) it gave the profile attached. |
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Tue Aug 6 13:07:07 2024, Xuejun, Update, Interferometer Simulations,
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[Xuejun]
The width and location of the measured in-air change in temperature profile has been determined to be 0.045m and 0.137m respectively. Subsequently,
a fake irradiance profile was able to be generated that best resembled what the actual irradiance profile could be using this information for testing in
COMSOL. The generated irradiance profile that output the most similar change in temperature profile as the measured in-air profile has been included as |
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Mon Oct 9 11:29:37 2023, Tyler, Update, Electronics, PSD/CSD Plot Updates
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Continuing from Sophia's SURF Project this summer: Plotting the Power-Spectral Densities (PSDs) and Cross-Spectral Densities of two signals.
A continued
issue that has been observed in the plots is the random "jump" of one PSD curves. Below, a 1.4 kHz signal is driven with a magnitude of 0.7 Vpp, and connected
to the two output ports of the Red Pitaya via an SMC T-Adapter. At the moment, I anticipate that this bug might have something to do with the Real-Time |
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Mon Oct 23 11:28:05 2023, Tyler, Update, Cameras, FLIR Camera Code Updates
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The past week I've been spending time going through the FLIR code on gitlab. Initially, it had appeared that our measurements with the camera had differed
about 2 degrees C from what the thermocouple was giving (Ref ELOG 181). Upon inspection of the FLIR streaming code, I noticed a few issues:
1. The emissivity
value wasn't set correctly (was 0.999 originally, should be about 0.95).
2. The ambient temperature was set to about 21.6 C (71 F).
3. The distance given |
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Mon Oct 30 11:03:56 2023, Tyler, Update, Scripts/Programs,
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FLIR: After some adjustments, the plot generated from the FLIR measurements look much more symmetric (see attachment). There are more included grid
points, which smooths out the curve as compared to last week.
Red Pitaya: It looks like a new OS update was released for the RP, which includes
a new Python API (was previously only available in C). I'm going to try and update the one we have currently running in lab.
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Mon Nov 6 11:29:24 2023, Tyler, Update, Electronics, Preliminary RTD Calculations, RP Software Update
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Preliminary RTD calculations are shown below, given an input of 10 V and desiring a few mA of current. It looks like R_ref should be at least 1 kOhm
(refer to plots/circuit below), keeping in mind we need to have
RP: The Red Pitaya Software was updated to OS 2.00. All examples on the RP website should run without issue. |