Proton Calorimetry/Experimental Runs/2024/UCLHQuADProBe 2024-04

Experiment Equipment

Item	Notes
Portable Enclosure	Modified Small Peli Case Wheeled. Features mount for scintillator stacks, front and back openings for beam, patch panel with ports. Mylar windows with 3D printed alignment plates: approximately light-tight.
Rev. D Scintillator stack 1	32 X x 105 mm, Y x 105 mm and Z x (approx) 3 mm sheets. Original injection moulded batch with polished edges and sanded faces. Containing sheets (ascending photodiode order, board upside down): 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168. Full stack thickness measurements (in mm): 95.75, 96.02, 96.09 = 95.95
Rev. D Scintillator stack 2	32 X x 105 mm, Y x 105 mm and Z x (approx) 3 mm sheets. Machined block with polished edges and sanded faces. Containing sheets (ascending photodiode order, board upside down): 289, 268, 291, 277, 300, 264, 282, 276, 271, 285, 262, 280, 295, 281, 297, 290, 270, 284, 294, 299, 269, 302, 301, 296, 287, 263, 288, 293, 285, 265, 275, 292. Full stack thickness measurements (in mm): 96.89, 96.85, 96.70 = 96.81
Rev. D Texas Instruments DDC232 custom circuit board (x2)	Housing 32x Hamamatsu S12915-16R photodiodes, coupled directly to scintillator sheets. Aligned by eye to scintillator sheets.
Nexys Video FPGA development board.	For interfacing between DDC232 and pi.
Raspberry pi5	Control data acquisition + visualise GUI.
Power Strip:	To connect FPGA and daughter board.
DAQ laptop x1	Back up option for data acquisition.
Control Laptop x2	1 for remote control, 1 for notes/web GUI.
D-LINK Network Hub	Set in experimental room to connect pi5, DAQ laptop + NPL devices
GL-Inet Router	Set in control room to take output from experimental room ethernet connection. Control laptops connected via ethernet or 5GHz WiFi.
Ethernet Cable x 4	To connect pi5 and DAQ laptop to network in the experimental room, hub to wall and in control room router to wall, and router to laptop.
Spare Cables:	Usb-C
Gloves	For handling scintillator

Schematic

Experiment Plan

1st Day: Tuesday 30th of April

2nd Day: Wednesday 1st of May

1) Shoot-through of old scintillator stack at 250MeV to check prior calibration. 50mm absorber -> scint stack -> pixel sensor -> TC -> water dump. Both directions for stack so will rotate midway through.

2) Shoot-through calibration of new scintillator stack 1 at 250MeV. 50mm absorber -> scint stack -> pixel sensor -> TC -> water dump. Both directions for stack so will rotate midway through.

3) Shoot-through calibration of new scintillator stack 1 at 250MeV. 50mm absorber -> scint stack 2 -> scint stack 1 -> pixel sensor -> TC -> water dump. Both directions for stack so will rotate midway through. Full QuARC cabling complete here. 3a) Background measurement of scintillator stacks 1+2

-- Add calibration files to appropiate file for GUI

4) Rotate gantry to front of case. Full system check at 160MeV with beam on axis. Check readout of TC and pixel sensor.

5) Range tests with on-axis beam at 70, 90, 110, 130, 150 and 170 MeV. Beam on axis.

6) TC calibration with 1 second beams at 110 MeV and 160 MeV.

7) Position tests for pixel sensor with manual adjustments in couch position. Check QuARC readout for nonlinearities.

8) Treatment plan single position range scan (if available from UCLH).

9) Treatment plan box field scan for 3 x 3 x 3cm and 5 x 5 x 5cm volumes (if available from UCLH).

10) Brain tumour scan (if available from UCLH).

If none of the treatment plans are available we may have to go through and do some of the position/energy steps manually.

Experiment Notes

Stack A + NUC PC.

Beam current **

Run number	Beam Energy (MeV)	Dose Rate (MU/min)	Estimated Range in Eye (mm)	Spot size (mm, FWHM)	DDC232 FSR (pC)	DDC232 Integration Time (us)	Measurements	Comments	Photodiode QB Fit	Replay Fit
0	Background	-	-	-	-	-	170 (constant)	-
1	-	-	-	-	-	-	-	-