 Thu Jun 8 14:51:58 2023, Pamella, Update, FLIR, FLIR- Distance 
|
[Pamella, Tyler]
Today we change the distance between the FLIR camera and reflector (3D-Mask with mirrors and light). Now the distance is
0.2032 m.
Note: This distance is just for take a snap most close possible but we need move again for a little far way because in this distance
we can't move up and down the reflector for have data to compare.
|
|
Tue Jun 6 16:15:09 2023, Peter, Update, VLC Update, Launch Optics for Visible Light Cavity
|
I assembled the first few components of the launch optics for the visible light cavity. Below is an image of the current table configuration, and the image
is how the cavity will be oriented on the table. |
|
Tue Jun 6 16:04:46 2023, Aiden, Update, General, Water
|
| Aiden went and refilled the de-ionized water to continue clean and bake batches. |
|
Fri Jun 2 14:28:40 2023, Pamella, Update, FLIR, FLIR project - Test without the black wall.
|
[Pamella]
Test without the black wall.
Note: So today i collected data for some positions in axis Y (height) for starting
analyses and compares the triangles shapes. I tried keep the same parameters every time.
First position:
01:20 pm :
Started testing and collection data. Parameters: 0.10 A, 1.6V. Reference position: (0,0.05).
01:30 pm : Started snapping the screen. Parameters: |
|
Thu Jun 1 14:41:36 2023, Pamella, Update, FLIR, FLIR project - Test without the black wall.
|
[Pamella]
Test without the black wall.
General test:.
11:15 am : Started running the code. Parameters: 0.11 A, 1.9V and
focus distance around 0.55m.
11:28 am : Started snapping the screen. Parameters: 0.12 A, 1.8V and 44.1 C .
First trying:
01:18 pm : Started testing and collection data. Parameters: 0.09 A, 1.4V. Reference position: (0,0).
01:28 pm : Started snapping the screen. |
|
Wed May 31 16:55:55 2023, Pamella, Update, FLIR, FLIR- Focus distance
|
[Pamella and Tyler]
We changed the FLIR Focus Distance for around 0.55 m.
Note: The old focus distance was 1.3 m.
We
tested this new focus distances and looks good. I attached a snap below.
Parameters: 0.1 A , 1.5 V and 38.4 C.
|
|
Wed May 31 16:18:41 2023, Aiden, Summary, General, Mock FROSTI
|
| Finished assembly on the Mock FROSTI so it is ready for the fit test at LIGO lab. |
|
Wed May 31 12:16:28 2023, Shane, Update, Cleanroom, cleanroom particle counts (full 5 zone measurement)
|
| Attached is the full 5 zone particle measurement for the cleanroom after this week's cleaning, 5/31/23. |
|
Wed May 31 11:42:16 2023, Pamella, Julian and Shane, Update, General, Cleaning room and particle count
|
[Pamella, Shane and Julian]
Cleaning room and particle count
09:58 am: Started the particle count
Zone
3:
0.3u : 1,995
0.5u : 540
1.0u : 0
Zone 4:
0.3u : 124
0.5u : 0
1.0u : 0
10:25 am: Started checking the surfaces inside the cleanroom.
10:30 |
|
Tue May 30 14:51:27 2023, Pamella, Update, FLIR, New 3D mask - Bigger triangles shapes.
|
[Pamella]
Change the 3D mask
Started removing the old mask in the reflector.
Started cutting the new aluminum lid for the
new 3D mask and assembling in the 3D mask.
Started doing the new cable connections for the light.
Started testing the resistance
in the new cable connections. The multimeter show us 14.2 Ω.
Started attaching the mask with the light and the thermometer sensor.
|
|
Wed May 24 14:28:26 2023, Peter, Update, VLC Electronics, Laser intensity/polarization drift measurements
|
I went in and took polarization drift data for 16 hours. The run started at 6:08pm and finished at 9:15am the next day. The four plots below are the same
plots shown for the 2 hour collection and previous trials, except they extend to 16 hours. The only one that is different is the Power vs. Time graph.
This is a graph of the actual incoming power of the laser (as opposed to the signal voltage that the PDA's output into the red pitaya). This was done using |
|
Wed May 24 14:06:27 2023, Pamella, Update, FLIR, FLIR project - Tests
|
[Pamella]
Initial tests
10:30 am : Started trying take some test with the new position/configuration between the 3D reflector-mask
and the FLIR camera.
10:41 am : Started running the python code and take a snap. Parameters: 0.10 A, 1.4 V.
10:50 am : Started take
the snap.It is possible see the triangles, this is a good thing. Negative thing: The middle/center point for the light maybe would be some problems for |
|
Tue May 23 16:52:56 2023, Pamella, Update, FLIR, FLIR project - Reinstalling the mask and Reconfiguration FLIR position.
|
[Pamella]
Reinstalling the mask and Reconfiguration FLIR position.
Today i change the aluminum foil inside the 3D mask. After some
tries i was able to have a better shape for the triangles.
I reinstalled the connections (the light with the thermometer point). Also i checked
for the focal point inside the reflector, looks fine.
I did a reconfiguration for the initial tests, without the black wall. I moved the FLIR |
|
Mon May 22 17:08:50 2023, Pamella, Update, FLIR, FLIR project - Installing the mask.
|
[Pamella]
The new mask for the reflector.
1:40 pm: Started reconfiguration on the FLIR camera project. Changed the
old bridge for the new mask-bridge.
2:00 pm: Started figure out the best way to cutting the aluminum foil with the new mask. Unfortunately,
I had been some problems for cutting the perfect shape triangles with the mask because the size inside the triangle is different (smaller) than cutter/knife, |
|
Mon May 22 16:43:28 2023, Peter, Update, VLC Electronics, Laser intensity/polarization drift measurements
|
In order to fully analyze the polarization data taken last Thursday, I needed to convert the signal output (which is in volts) to power (units of watts).
I used the power meter to accomplish this. Keeping the exact same configuration of PD's and beam splitting, opened the red pitaya's oscilloscope package.
I then took the power meter, and held it in front of the PD to measure the amount of Watts at each PD. I then wrote down the corresponding voltage being |
|
Thu May 18 14:07:08 2023, Peter, Update, VLC Update, 532nm Intensity Measurement
|
I figured out a method in which to capture power measurements including the initial seconds in which the beam is first turned on. I first clear and restart
the kernel of the python notebook. Then I run the command to connect the red pitaya oscilloscope package to the input data being taken in both channels.
To my understanding, this allows for data acquisition as the code compiles. I then started looping the 1.074s trigger bunches, and then roughly 2 seconds |
|
Wed May 17 12:18:08 2023, Pamella, Julian and Shane , Update, General, Cleaning room and particle count
|
[Pamella, Julian and Shane]
Particle count:
10 am: Started particle count
Zone 3 :
0.3u: 1288
0.5u: 332
1.0u: 124
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. |
|
Tue May 16 11:56:33 2023, Peter, Update, VLC Electronics, 532nm Intensity Measurement
|
With the configuration the exact same as before, I used the Jupyter notebook in the red pitaya's development package to collect data from both input channels.
Last week, I was able to take data, yet only for a very short period of time, and I did not know how to change it. I went online to the red pitaya's user
manual to figure out how to change the sampling period for longer. The link to the page is here: https://redpitaya.readthedocs.io/en/latest/appsFeatures/examples/acqRF-samp-and-dec.html#s-rate-and-dec |
|
Sun May 14 15:50:48 2023, Cao, Infrastructure, Computers, High resolution display of logrus machine
|
[Cao]
The display resolution of the logrus has been 1064x768 and has been the only option, which is not great. While remote access to logrus using
rdesktop allows rendering a virtual display of user's chosen resolution, it is not fast when using graphic-intensive program. NoMachine allows user to
take over and control the machine remotely and thus appears as the same machine. However, NoMachine cannot render a virtual display like rdesktop. This |
|
Fri May 12 20:28:34 2023, Aiden, Cao, Physics, VAC, Vacuum chamber Helium leak test
|
[Aiden, Cao]
1. Helium leak test
2:00 pm: Uninstall regulator from nitrogen gas tank and move to helium gas tank. Place helium onto
cart and move to the rear door of the clean tent. With the tank remaining outside, feed hose through the flexible wall to use in clean tent - See attached |
|
Wed May 10 10:49:34 2023, Aiden, Update, General, RGA Software
|
[Aiden, Cao]
Went over how to use the RGA software, how to change the graph units, scaling and mass detection. Also went over how to remove the RGA from
the vacuum system as well as procedure for turning it on. |
|
Tue May 9 20:55:12 2023, Jon, Infrastructure, VAC, Calibrated Ar leak rate
|
For future reference, the calibrated Argon source has a leak rate of 7.55E-8 atm cc/s, or equivalently 5.74E-8
torr L/s. This can be used to calibrate RGA scans to units of physical leakage (outgassing) rate. |
|
Wed May 3 19:03:47 2023, Julian,Pamella and Cao, Physics, VAC, Modify vacuum asssembly and install RGA
|
[Pamella, Julian, Cao]
Today we started re-configuring the vacuum chamber components.
Particle count
10:45 am : Starting
the particle count in the clean room.
11:13 am : Finished the particle count in the clean room.
Zone 3 :
0.3 u: 2535
0.5 u: 1413
1.0 u: 789
Zone 4 :
0.3 u: 457
0.5 |
 Tue May 9 15:49:20 2023, Jon, Infrastructure, VAC, Permanent cable routing
|
Today I brought in a fresh supply of zip ties (we now have 1500 in the tool chest) and used them to permanentize the cable routing for the gauges, pumps,
and RGA.
I also brought and installed a 3-foot 15A extension cable for powering the scroll pump. Installing the cable required shutting down the pumps, |
|
Mon May 8 12:00:03 2023, Pamella, Shane, Julian, Update, General, Cleanroom 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: |
|
Thu May 4 14:01:10 2023, Peter, Update, VLC Electronics, 532nm Intensity Measurement
|
I adjusted the rotational mount of the wave plate to see if the power can be 100% coupled into either S or P polarization. The images shown below of the
oscilloscope indicate that this is not possible. The minimum transmitted power we can obtain in either S or P polarization is 75mV. The maximum voltage
we obtain in either S or P polarization is ~ 740mV. This means that at a maximum, we can obtain ~ 90% polarization in either direction, indicating that |
|
Tue May 2 17:03:14 2023, Jon, Cao, Physics, VAC, First pump-down test of vacuum chamber
|
[Jon, Cao]
1. Re-routing of cables
We re-routed the connections between the turbo pump and its fan to the controller. Instead of going through the side of the server rack, they |
|
Tue May 2 15:55:33 2023, Peter, Update, VLC Electronics, 532nm Intensity Measurement
|
I changed the 1/2 wave plate from the lens mount to the rotational optic mount. This allowed me to rotate the 1/2 wave plate, which changed the respective
polarization power transmitting through S and P polarization. Initially, more power was coupled into the P polarization. Now, with the 1/2 plate rotated,
both channels are experiencing the same voltage reading. Before feeding the PDA signals into the red pitaya, a 50 ohm terminator had to be placed at the |
|
Mon May 1 18:56:57 2023, Peter, Update, VLC Electronics, 532nm Intensity Measurement
|
I've configured the two PDA's to the Red Pitaya. I put a 50 ohm resistor connector to each red pitaya input port. This was because the oscilloscope showed
that the voltage reading from the P polarization PDA was almost at 1V, which was the limit of the red pitaya. Once both S and P polarization PDA's were
connected, I opened the red pitaya's oscilloscope. A screenshot of the voltage readings is shared below. Channel 1 (Yellow) is for S polarization. Channel |
|
Mon May 1 17:10:25 2023, Julian, Cao, Physics, VAC, Installing Pirani gauge and RGA probe onto to vacuum chamber
|
[Julian, Cao]
03:00 pm: Particle count
: Zone 3
0.3 um: 498
0.5 um: 124
1 um: 124
:
Zone 4
0.3 um: 748
0.5 um: 457
1 um: 374
03:32 pm: Installing Pirani |
|
Thu Apr 27 09:48:34 2023, Aiden, Summary, General, Batch 12 Bagging
|
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. |
|
Fri Apr 28 19:39:19 2023, Cao, Summary, General, Clean 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 |
|
Fri Apr 28 19:00:13 2023, Cao, Physics, VAC, Tighten CF ports on vacuum chamber
|
[Cao]
After Jon's comment yesterday that some of the connection did not seem to have good metal-metal contact, in particular the gate valve connection,
I went through the ConFlat connections today and retighten them.
I found a lot of the CF connections are not particularly tightened and there were a lot
of range left that can be tightened with the wrench. After re-tightening, the copper gaskets are not visible anymore. For example, see the attached images |
|
Thu Apr 27 16:23:44 2023, Cao, Pamella and Julian, Physics, VAC, Installing vacuum system (cont.)
|
[Pamella, Cao and Julian, Shane]
Particles account
10:37 am: Starting the particles account
Zone 3:
0.3u: 1662
0.5u: 872
1.0u: 415
Zone 4:
0.3u: 831
0.5u: 124
1.0u: 0
11:14 am: Start removal of calibrated leak to install 45 deg elbow
11:21 am: |
|
Thu Apr 27 21:43:07 2023, Jon, Physics, VAC, Grounding vacuum system
|
This afternoon I made up a green 10 AWG grounding cable and connected it to the vacuum system.
One end is tightly connected to the bottom flange of the vacuum chamber (photo 1). It is run along and up the table framing to the top of the cleanroom,
where it exits into the overhead cable tray in the same location as the other power cables. It drops down from the top of the server rack all the way to |
|
Fri Apr 28 18:16:57 2023, Cao, Physics, VAC, Grounding vacuum system
|
Quote:
This afternoon I made up a green 10
AWG grounding cable and connected it to the vacuum system. |
|
Fri Apr 28 11:21:01 2023, Peter, Update, VLC Update, Laser intensity/polarization drift measurements
|
The Digi-key cables have arrived, and I have began implementing them in the intensity drift measurements.
There was a slight problem initially in connecting
the SMA to BNC cables from the photodiode to the red pitaya, since the red pitaya was way on the other side of the lab. Cao and I connected the red pitaya
to a new ethernet cable that extended far enough for the red pitaya to sit comfortably on the breadboard with the optics.
Right now the PDAs are not |
|
Wed Apr 26 18:05:41 2023, Pamella, Julian, Shane, Update, Cleanroom, cleanroom particle counts and cleaning log
|
pre-cleaning particle counts:
zone 3
0.3 mu: 2494
0.5 mu: 748
1.0 mu 124
zone 4
0.3 mu: 374
0.5 mu: 41
1.0 mu: 0
3:45 pm: Started wiping
the surfaces(laser table,chamber, computer) inside the cleaning room.
4:05 pm: Finished wiped the surfaces
4:08 pm: Began vacuuming |
|
Tue Apr 25 11:56:37 2023, Jon, Update, VLC Electronics, Red Pataya has arrived
|
| The Red Pataya 125-14 starter kit that we ordered for locking the 532 nm cavity has arrived. I left it laying on the optical table near the laser. |
|
Mon Apr 24 17:38:45 2023, Aiden, Summary, General, Clean and Bake Batch 12
|
Today I Bagged and tagged the o-rings from batch 11 and placed them inside the clean room. I also cleaned batch 12 parts in liquinox for 10 minutes and
them placed them into 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 200 deg C in 30 min.
4. Dwell at 200 deg C for 48 hours.
5. Off |
|
Fri Apr 21 16:51:26 2023, Pamella, Update, General, Cleaning 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.
|
|
Fri Apr 21 15:21:18 2023, Pamella, Update, FLIR,
|
FLIR project updates
01:50 pm: Starting test position 34 mm distance to black wall.
Parameters : 0.100 A, 1.5 V and
the temperature inside the mirrors 40°C.
2:09 pm : Finished the test and figured out this position it is too far the black wall so now we change
for more close position.
2:17 pm: Starting test in another position: 10 mm distance to the black wall( this measurement |
|
Wed Apr 12 16:13:19 2023, Cao, Physics, VAC, Vacuum prep and installation
|
Aiden, Pamella, Peter, Shane, Cao
Today we started vacuum chamber assembly work
10:16 am: Particle count measurement of clean
room
10:34 am: Particle counting finished: meets ISO 5 standard
Zone 3 :
0.3 u: 3159
0.5 u: 789
1.0 u: 83
Zone 4 :
0.3 u: 498
0.5 u: 41
1.0 u: 0
|
|
Fri Apr 21 00:06:43 2023, Jon, Update, VAC, Vacuum prep and installation - parts have arrived
|
The two parts needed to complete the vacuum assembly (ELOG 70) have arrived.
(10) 5/16"-24 x 1 3/4" threaded rods - for attaching the turbo pump reducing nipple to the CF 4.5" gate valve;
(1) 45 degree CF
2.75" elbow for attaching the calibrated Ar/He leak to the chamber.
I left them laying on top of the ultrasonic washer. They both need |
|
Wed Apr 19 17:39:50 2023, Pamella, Update, FLIR, FLIR project
|
FLIR project updates- Initial tests
10:00: Starting test in position 2 cm to the black wall.
Parameters : 0,305
A, 05,5 V and the temperature inside the mirrors 141,8°C.
10:23 Finished this first tried and take snap. The image is attached below.
The name for the picture for this tried is “AcquisitionImage(Apr-19-2023_10 23)”.
10:37. Starting test in another position |
|
Mon Apr 17 17:06:49 2023, Aiden, Summary, General, Clean 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. |
|
Wed Apr 12 16:17:50 2023, shane, Update, General, Particle Counter moved
|
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. |
|
Wed Apr 12 10:53:02 2023, Aiden, Summary, General, Valve Cleaning
|
Bagged and Tagged the parts from batch 10 and placed them inside the clean room.
Then cleaned the last gate valve in liquinox for 20 minutes (10 minutes
each side). Then dried the valve, bagged, tagged, and placed it inside the clean room. |
|
Tue Apr 11 17:56:15 2023, Pamella, Update, General, Lab cleaning
|
Today Pamella and Julian finished cleaning of the cleanroom, starting with the HEPA vacuuming, mopping and clearing all floor with IPA wipes. Also we wiped
down some surfaces of the blue table, computer table and the top of chamber. |
|
Tue Apr 11 13:15:40 2023, Cao, Infrastructure, Clean & Bake, Nitrogen gas tank replaced
|
The nitrogen gas tank has been replaced with a new unit. The new tank is ultra pure nitrogen (>99.9% nitrogen).
The new tank has been placed and secured
to the rack where the old one is; cap is removed and regulator is reinstalled onto the new tank. |
|
Fri Apr 7 09:48:09 2023, Pamella, Update, General, Clean the system parts 7x
|
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. |
|
Thu Apr 6 10:20:43 2023, Peter, Update, VLC Update, Laser intensity/polarization drift measurements
|
More optical components were added to the optical set up for laser intensity / polarization drift measurements. Both lenses and both PDs were added to the
configuration, as seen in the image below. The beam is already well aligned into the center of both of PDs, and focused nicely by the lens.
Both PD's
take BNC connecting cables, and the Red Pitaya takes SMA connecting cables. Since we are currently without a BNC to SMA cable, and we do not want to cut, |
|
Tue Apr 4 16:52:08 2023, Jon, Update, Cleanroom, Particle counter docking station
|
Due to the problems we have encountered trying to serially communicate directly with the Met One DR-528 particle counter, I went ahead and ordered the add-on
communications/charging dock. The dock "ethernetizes" the serial communications by wrapping them in TCP packets and transmitting them over the lab network.
This will allow our Python code to communicate using the standard Internet sockets package, rather than PySerial, PyNut, etc.
the docking station arrived |
|
Tue Apr 4 16:43:53 2023, Jon, Update, VLC Electronics, Additional Thorlabs PDA10A2
|
I ordered a second PDA10A2 and mounting post + spacer (which puts the aperture at the VLC's standard 3" beam height). These arrived today and I delivered
them to the lab. They are sitting on the VLC table near the laser. |
|
Tue Apr 4 09:53:37 2023, Peter, Update, VLC Update, Laser intensity/polarization drift measurements
|
The set up for the next round of beam characterization measurements has begun. The beam is initially passing through a half waveplate, is split at a polarizing
beam splitter, and then stirring mirrors are used to properly aim the beam into photodiodes (not yet installed). This is the current configuration of the
set up. |