 Tue Feb 28 19:31:05 2023, Peter, Update, VLC Electronics, 532 M2 Measurements 
|
Took M2 measurements today. Configuration: Lens 1 (f = 50mm) at 0mm. Lens 2 (f = 150mm) at 200mm, camera at 350mm. The laser beam was being moved in -z
direction on track (so further away from the first lens). Quick data shown in the sheets plot. Not a real fit. I was trying to see where the beam waist
was if there even was one. Seems that it is much further than we have room for on the track. Will need to come back and take more data.
I suggest maybe |
|
Tue Feb 28 13:53:17 2023, Pamella, Update, General, Vacuum chamber cleaning
|
Pamella, Dr. Richardson and Dr.Cao finished checking and cleaning the interior of the chamber, chamber lid, and exterior of the chamber with Vectra Alpha
wipes, IPA and in some parts we used acetone . We flip the chamber and put chamber on the table again. A picture of the specific situation is attached
below. The next step from here would be to finish the cleaning the floor .
The black residues on the side of the table probably is some reaction between |
|
Mon Feb 27 17:09:04 2023, Pamella , Update, General, Vacuum Chamber Cleaning
|
Pamella and Julian finished cleaning the interior of the chamber, chamber lid, and the table. We found some black residue on the side of the table but not
sure what the issue is. A picture of the specific area of the table that is giving off the black residue is attached below. The next step from here would
be to flip the chamber on its side and finish the cleaning the exterior. |
|
Thu Feb 23 21:12:33 2023, Julian, Update, General, Vacuum Chamber Cleaning
|
Today I was able to come in and wipe down both sides of the vacuum chamber lid using the regular alcohol wipes and also wipes that were left to dry in the
fume hood then saturated with acetone. I managed to get a good amount of the residue off both the inside and outside surfaces of the lid, then did a test
wipe of both sides using acetone-soaked wipes; pictures of the wipes are attached below. Once I finished with the lid, I used another acetone wipe to test |
|
Thu Feb 23 13:32:55 2023, Shane, Update, General, Clean 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. |
|
Tue Feb 21 17:51:04 2023, Aiden, Summary, General, Clean 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 |
|
Fri Feb 17 19:12:39 2023, Aiden, Update, General, Clean 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. |
|
Mon Feb 13 18:57:53 2023, Aiden, Summary, General, Clean 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). |
|
Sat Feb 11 17:09:29 2023, Shane, Update, General, clean room particle counts 2/10/23
|
Took a round of clean room counts after the latest clean of vacuum chamber on Feb 10. Used 60 second sample time, 5 samples for each of the 5 zones. Plots
attached for both occupied clean room (one person inside, attachment 1) and unoccupied clean room (empty attachment 2), as well as the raw data from the
particle counter (attachment 3). |
|
Sat Feb 11 00:17:27 2023, Julian, Update, General, Vacuum Chamber Cleaning
|
Today I finished wiping down the rest of the vacuum chamber, specifically focusing on the connecting ports and outside surface of the chamber. When I was
finished, I test wiped every surface of the chamber and took pictures confirming the current state of cleanliness; Attachment 1 "Wipes for top and bottom
of chamber's upper lip." Attachment 2 " Top and bottom of chamber's lower lip." Attachment 3 "Inside and Outside main chamber." Attachment 4 "Inside connecting |
|
Fri Feb 10 16:34:45 2023, Huy Tuong Cao, Infrastructure, Clean & Bake, Nitrogen gas tank ready to use
|
Cao,
Today I fixed the final bit related to the nitrogen gas tank, which is to apply sealing tape to M-NPT connector of the hose to prevent
leakage
(file: AirGunSealed.jpg)
After application of the tape, no audible leak can be heard from connection between the hose and the air gun. |
|
Fri Feb 10 15:15:30 2023, Aiden, Update, General, Bagging First Batch
|
Aiden Bagged and Tagged the first batch of stainless steel parts shown on the google spread sheet.
1. Removed two parts from the oven.
2. Place them
in the ESD bag.
3. Seal bag with Kapton Tape.
4. Create label including part name and number underneath it.
5. Put label onto the side of the bag where
it is not sealed with tape.
6. Placed bagged items into clean room on work table.
ps. total bags in first batch = 4 |
|
Tue Feb 7 17:44:17 2023, Jon, Infrastructure, Computers, Workstation 1 (ws1) set up
|
The Linux workstation (ws1) that used to sit on the old workbench has been mounted on the new electronics bench and is now ready for use again. I upgraded
the OS to Debian 11.6 and also upgraded the CDS workstation tools. |
|
Tue Feb 7 17:27:30 2023, Aiden, Physics, ELOG, Clean and Bake Batch #1
|
Cleaned 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)
PS. Ultrasonic washer does not have heating feature. |
|
Mon Feb 6 20:02:32 2023, Julian, Update, General, Cleanroom 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. |
|
Sat Feb 4 17:01:03 2023, Peter, Update, VLC Electronics, Laser Data
|
Peter and Ryan took laser beam data. Configuration: 100mm focal length lens is ~100mm from lens. 150mm focal length lens is ~200mm from first lens. Beam
waist is ~420mm from second lens.
Beam waist is very small still. Had to input large amounts of error in data collection. Took width data successively
at points near waist and at >= Rayleigh range. Plots are shown below.
Key points:
Took a while to figure out optimum configuration for lenses to |
|
Fri Feb 3 13:04:04 2023, shane, Summary, General, clean room particle counts 1/25/23
|
| Clean room count graphs for each zone (as of January 25, 2023) attached |
|
Fri Jan 27 18:44:31 2023, Julian , Update, General, Vacuum Chanmber Cleaning
|
I used the IPA wipes to wipe down the inside of the chamber the best I could. I cleaned the main chamber but not any of the connecting joints. When I finished
I did a once over with a fresh wipe and found no residue. |
|
Thu Jan 26 18:58:25 2023, Aiden, Update, General, Oven Heating
|
| Aiden cleaned the oven with methanol again and set the oven to 260 degC for 12 hours. |
|
Mon Jan 23 17:26:15 2023, Peter Carney, Update, General, Oven cleaning
|
Aiden and Cao
Turned on the oven to 120 deg C for 12 hours. After 12 hours, put it at 200 deg C for 48 hours. |
|
Wed Jan 18 22:06:05 2023, Julian, Update, ELOG, Cleanroom Update
|
| I wiped down all the inner walls of the cleanroom using alcohol wipes, as per Cao's instruction. |
|
Wed Dec 14 18:34:33 2022, Jon, Configuration, Electronics, Adapter for 532 nm laser power supply
|
I installed an EU-to-US plug adapter for the 532nm laser's 9V power supply. I then re-measured the laser's power with the correct supply voltage (previously
we had been using a 6V supply). At 9V, the max power is 0.83 W, so the laser is confirmed to be Class 2 as labeled. |
|
Wed Dec 14 17:35:41 2022, Jon, Infrastructure, Computers, Windows Laptop
|
I set up the new Windows 10 laptop (pictured below), which arrived yesterday. This laptop is intended to be used for running lightweight Windows-only
programs, such as the Thorlabs beam profiler software or the SRS RGA client. However, none of that software is installed yet.
Configuration details
As usual, the computer is configured with one shared account (username: controls) and the standard password. Note |
|
Mon Nov 28 18:10:23 2022, shane, Update, ELOG, Particle counts in the clean room
|
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 |
|
Mon Oct 3 17:21:39 2022, Cao, Update, TCS, Inspection of macor parts 7x
|
The macor parts arrived and inspected today. These include:
Macor spacer (drawing: LIGO_Redesign_Macor_Spacer_Drawing_v4.pdf
attached below), quantities: 40
No defects, damages observed
Parts are free from grease/ machining fluid
Wall thickness
of 1 mm appear to provide sufficient stiffness to part
Images of parts: Macor_spacer_0.jpg, Macor_spacer_1.jpg
|
|
Wed Aug 17 16:04:30 2022, Phoebe Zyla, Summary, Lore, Testing the Cartridge Heater and Collecting FLIR Data
|
We have tested the heater to find emissivity, mounted the heater system to the optical table, and have taken irradiance maps of the heater projected
onto the screen.
The heater's emissivity was determined by using a thermocouple in conjunction with the FLIR's temperature calibration. To attach
the thermocouple to the heater initially, I used Kapton tape and ran both the wires of the heater and the thermocouple through the heater bridge. This |
|
Tue Jul 26 14:10:35 2022, Cassidy, Update, Cameras, Optical Post Replacement and Realignment
|
Today I replaced the 3" optical post that the camera rests on with a 2" optical post in order for the screen to correctly fill out the camera's FOV. The
3" post is now in the glass optics cabinet next to the FLIR camera configuration box, wrapped in the protective materials from the 2" post for safekeeping.
There were no issues with the physical replacement of the post, except that the fork clamp on the post needs to be on one of the perpendicular, |
|
Fri Jul 22 13:20:28 2022, Phoebe, Update, , 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. |
|
Mon Jul 11 14:29:45 2022, Jon, Omnistructure, General, HEPA filter installed
|
Today I unpacked and installed the new HEPA filter for the lab. It is an Omni CleanAir OCA1210 capable of 1200 CFM. This flow rate is sufficient to turn
over the air in the room once every 4 minutes, or 14 times per hour. Hopefully this will cut down on our particulate accumulation issues. |
|
Tue Jun 21 18:31:49 2022, Cassidy and Phoebe, Update, Cameras, IR Absorbing Screen and FLIR Camera Setup
|
Today we set up the IR absorbing screen and the camera on the optical table, as well as tested that the camera was functioning as expected (picking up heat
sources beyond the screen).
Screen Setup
The screen was set up by clamping it between two rectangular posts on each side. First, two posts
were set up with 22 in. between them (thus allowing the screen to span a total distance of up to 24 in. when clamped down). To best stabilize the screen |
|
Thu Jun 2 21:55:02 2022, Jon, Update, Cameras, FLIR Camera Setup
|
The new FLIR A70 infrared camera has arrived. Tyler and I unpacked it in the lab yesterday. In less than an hour, we succeeded in powering it on and
connecting it to the lab network. We have assigned it the static IP address 192.168.1.6.
Online Configuration Portal
The FLIR camera can be configured, as well as stream live data, through a web browser interface. It can |
 Fri Jun 3 13:03:33 2022, Jon, Update, Cameras, FLIR Camera Setup
|
Summary
I have installed the requisite software on chimay for interfacing the FLIR A70 camera in Python. There are two packages required from
FLIR:
Spinnaker SDK, which provides the low-level camera drivers and a C/C++ API.
|
|
Mon Jun 6 17:11:48 2022, Jon, Update, Cameras, FLIR Camera Setup
|
Today I tested the Spinnaker/PySpin software installations (detailed in ELOG #4) with the FLIR
camera connected to chimay. It works!
Example codes
I was able to run several of the PySpin example codes. In particular, there is one which connects to the camera and streams |
|
Thu Jun 2 16:14:58 2022, Jon, HowTo, General, Custom conda environment on JupyterHub
|
| Cross-linking instructions: How to run a Jupyter notebook in your custom Conda environment |
|
Sun Apr 10 15:39:49 2022, Rutuja Gurav, HowTo, Computer Scripts/Programs, HowTo: Renew the Let's Encrypt SSL certificate using certbot
|
Port 80 is kept closed by default. This might be causing the certbot auto-renewal cronjob to fail. Therefore we must renew the certificate manually.
Step 1: Open port 80. (This is needed as the certificate renewal process runs some tests which requires client communication over |