Proton Calorimetry/Experimental Runs/2022/Jun16

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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.
Hole for sensor powering.
Mylar windows with Al support mounted to internal face: approximately light-tight.

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

UCL_Setup.png

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 (continued) N/A N/A N/A N/A
8 240 N/A 10 N/A 350 170 50 LH shoot through; 270° gantry; CMOS sensor saturated N/A N/A N/A N/A
9 240 N/A 10 N/A 12.5 170 50 LH shoot through; 270° gantry; CMOS sensor saturated N/A N/A N/A N/A
10 240 N/A 10 N/A 12.5 170 50 RH shoot through; 90° gantry; CMOS sensor saturated N/A N/A N/A N/A
11 200 N/A 90 N/A 12.5 170 50 RH shoot through; 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
12 200 N/A 20 N/A 12.5 170 50 RH shoot through; 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
13 130 N/A 50 N/A 12.5 170 0 90° gantry; CMOS sensor slight saturation; N/A N/A N/A N/A
14 120 N/A 60 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
15 120 N/A 270 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
16 110 N/A 70 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
17 110 N/A 300 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
18 100 N/A 90 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
19 100 N/A 350 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
20 90 N/A 110 N/A 12.5 170 0 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
21 90 N/A 400 N/A 12.5 170 0 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
22 80 N/A 500 N/A 12.5 170 0 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
23 70 N/A 700 N/A 12.5 170 0 90° gantry; CMOS sensor fine; N/A N/A N/A N/A
24 130 N/A 200 N/A 12.5 170 0 90° gantry; CMOS sensor saturated; N/A N/A N/A N/A
25 200 N/A 20 N/A 12.5 170 50 LH shoot through; 270° gantry; CMOS sensor fine; N/A N/A N/A N/A
26 130 N/A 200 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
27 120 N/A 270 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
28 110 N/A 300 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
29 100 N/A 350 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
30 90 N/A 400 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
31 80 N/A 500 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
32 70 N/A 700 N/A 12.5 170 0 270° gantry; CMOS sensor saturated; N/A N/A N/A N/A
33 background N/A N/A N/A 12.5 170 50 RevC onwards; 270° gantry N/A N/A N/A N/A
34 240 N/A 13 N/A 12.5 170 50 LH shoot through; 270° gantry N/A N/A N/A N/A
35 240 N/A 13 N/A 12.5 170 50 RH shoot through; 90° gantry N/A N/A N/A N/A
36 110 N/A 300 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
37 105 N/A 350 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
38 100 N/A 350 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
39 95 N/A 400 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
40 90 N/A 400 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
41 85 N/A 500 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
42 80 N/A 500 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
43 75 N/A 700 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
44 70 N/A 700 N/A 12.5 170 0 90° gantry; N/A N/A N/A N/A
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