Proton Calorimetry/Experimental Runs/2022/Jun16: Difference between revisions
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Revision as of 15:17, 16 June 2022
Afternoon test at UCLH with photodiodes and CMOS sensor.
Experiment Equipment
Item | Notes |
---|---|
Network Hub | Set in control room to take output from experimental room ethernet connection. Control laptops connected via 5GHz WiFi. |
Control Laptop x3 | 2 for remote control of CMOS sensor and FPGA, 1 for notes/web GUI. |
Ethernet Cable x 3 | To connect DAQ laptops to network in the experimental room, network hub to network in control room. |
Portable Enclosure | Modified Big Zarges Waterproof Wheeled Equipment Case.
Features mount for scintillator stack, front and back openings for beam, patch panel with ports for SHV, BNC, SMA, USB, Camera Link cables. |
Scintillator stack | X x 10 mm, Y x 10 mm and Z x (approx) 2.8 mm sheets in ascending order from the front/beam of the end of the scintillator. Sheet numbers from front to end (in beam direction): 51, 5, 54, 3, 45, 1, 31, 50, 49, 44, 39, 9, 42, 33, 46, 47, 38, 37, 40, 8, 32, 43, 34, 41, 52, 6, 55, 4, 35, 11, 36, 24. Full stack thickness measurements (in mm): 90.61, 90.65. |
DAQ laptop x2 | Control CMOS sensor and photodiode acquisition. |
Nexys Video FPGA development board. | For interfacing between DDC232 and PC. |
Rev. 2 Texas Instruments DDC232 custom circuit board (x2) | Each housing 16x Hamamatsu S12915-16R photodiodes, coupled directly to scintillator sheets with optical gel. Aligned by eye to scintillator sheets. |
Gloves | For handling scintillator |
Optical Gel | For photodiode-scintillator optical coupling |
Schematic
DDC232 Instructions
- Bash script
prog.sh
executesFTDI.cpp
andlivePlot.cpp
. Execute with. prog.sh 2 350 0 170 0 50 true 20211102/capture.txt
in the directoryPhotodiodes
.- First argument is the number of DDC232s.
- Second argument is the full-scale range (FSR) in pC. Choices are: 12.5, 50, 100, 150, 200, 250, 300, 350.
- Third argument is the y-scale for the ROOT display. Set to 0 for default.
- Fourth argument is the integration time in us. Range is 170-1455. Set in multiples of 5 us.
- Fifth argument is the number of measurements to acquire. Typically acquire 5700 measurements per second. Set to 0 for infinite loop.
- Sixth argument is the rate in Hz to update the file
average.csv
for ROOT/web GUI plotting. - Seventh argument is a boolean to choose whether to display the ROOT plot.
- Eighth argument is the filename and destination for the output hexadecimal data.
- After acquisition, close ROOT by choosing File->Quit in the ROOT window and then stopping DAQ (if in infinite loop) with CTRL-C.
- To perform a fit while acquiring data, add the following arguments:
fit 20211103 background.txt backST.txt frontST.txt
- Ninth argument enables fit option
- Tenth argument is the folder containing background and shoot-through measurements.
- Eleventh, twelfth, thirteenth argument are the background, back shoot-throughs and front shoot-throughs respectively.
Experiment Plan
- Background & calibration shoot-throughs (background at all 8 DDC232 full-scale ranges)
- Pencil beams, 70-110 MeV, 5 MeV steps, 2 currents (high/low)
- Live fit demo: pencil beam 100-110 MeV
- Treatment plan: range steps, 110 MeV-70 MeV, 1 MeV steps, no x-y scanning (demo live fit)
- ±1, 2, 3, 4mm in x-y planes, 100 MeV
- Detector misalignment, ±2°, ±5°, ±10° 100 MeV
Experiment Notes
Range calorimeter measurements with CMOS sensor + photodiodes.
Images from Sensor: /unix/www/html/pbt/wikiData/images/UCLH_Jun2022/CMOS
Photodiode hexadecimal data: /unix/pbt/data/uclh/20220616/DDC232
Run number | Beam Energy (MeV) | Estimated Range (mm) | Current (nA) | Spot size (mm, FWHM) | DDC232 FSR (pC) | DDC232 Integration Time (us) | Degrader WET (mm) | Comments | Photodiode QB Fit | CMOS QB Fit | PDL Comparison | Replay Fit |
---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | Background | N/A | N/A | N/A | 350 | 170 | 0 | room light off | N/A | N/A | N/A | N/A |
1 | Background | N/A | N/A | N/A | 300 | 170 | 0 | room light off | N/A | N/A | N/A | N/A |
2 | Background | N/A | N/A | N/A | 250 | 170 | 0 | room light off | N/A | N/A | N/A | N/A |
3 | Background | N/A | N/A | N/A | 200 | 170 | 0 | room light off | N/A | N/A | N/A | N/A |
4 | Background | N/A | N/A | N/A | 150 | 170 | 0 | room light off | N/A | N/A | N/A | N/A |
5 | Background | N/A | N/A | N/A | 100 | 170 | 0 | room light off | N/A | N/A | N/A | N/A |
6 | Background | N/A | N/A | N/A | 50 | 170 | 0 | room light off | N/A | N/A | N/A | N/A |
7 | Background | N/A | N/A | N/A | 12.5 | 170 | 0 | room light off | N/A | N/A | N/A | N/A |
8 | Background | N/A | N/A | N/A | 12.5 | 170 | 0 | ST - room light off | N/A | N/A | N/A | N/A |