Proton Calorimetry/Experimental Runs/2022/ClatterbridgeQuARC

Detector Equipment

• Stack A: 14 clear sheets of scintillator around 2.86 mm thick, with mylar foil for optical isolation, in C-section stack holder and coupled to single Rev. B DDC232 board.
• Stack B: 11 clear sheets and 3 white painted sheets of scintillator with mylar foil for optical isolation (clear sheets), in C-section stack holder and coupled to single Rev. B DDC232 board.
• DAQ using USB104 A7 FPGA and Raspberry Pi (running web GUI).

Preliminary Stack Configurations

Clatterbridge Stack A

1) Sheet Number: 61, thickness: 2.91 mm 2) Sheet Number: 63, thickness: 2.9 mm 3) Sheet Number: 69, thickness: 2.86 mm 4) Sheet Number: 65, thickness: 2.85 mm 5) Sheet Number: 70, thickness: 2.85 mm 6) Sheet Number: 64, thickness: 2.84 mm 7) Sheet Number: 81, thickness: 2.84 mm 8) Sheet Number: 83, thickness: 2.84 mm 9) Sheet Number: 85, thickness: 2.84 mm 10) Sheet Number: 73, thickness: 2.83 mm 11) Sheet Number: 74, thickness: 2.83 mm 12) Sheet Number: 78, thickness: 2.83 mm 13) Sheet Number: 71, thickness: 2.79 mm 14) Sheet Number: 77, thickness: 2.79 mm

Order: 81, 83, 65, 74, 69, 78, 61, 77, 63, 71, 70, 73, 64, 85

Average thickness: 2.843 mm Stack thickness (excluding mylar): 39.8 mm Stack thickness (including mylar): 40.3 mm

Clatterbridge Stack B

1) Sheet Number: 68, thickness: 2.78 mm 2) Sheet Number: 75, thickness: 2.78 mm 3) Sheet Number: 82, thickness: 2.78 mm 4) Sheet Number: 62, thickness: 2.77 mm 5) Sheet Number: 72, thickness: 2.77 mm 6) Sheet Number: 76, thickness: 2.77 mm 7) Sheet Number: 67, thickness: 2.76 mm 8) Sheet Number: 80, thickness: 2.76 mm 9) Sheet Number: 84, thickness: 2.76 mm 10) Sheet Number: 66, thickness: 2.74 mm 11) Sheet Number: 79, thickness: 2.74 mm

12) Sheet Number: 52, thickness: 3.02 mm 13) Sheet Number: 54, thickness: 3 mm 14) Sheet Number: 51, thickness: 2.97 mm

Order: 52, 79, 68, 66, 75, 82, 84, 62, 80, 72, 67, 76, 51, 54

Average thickness: 2.814 mm Stack thickness (excluding mylar): 39.4 mm Stack thickness (including mylar): 39.9 mm

Experiment Plan

• 60 MeV pristine Bragg peak measurements (and with some absorber for different ranges?):
  • Stack A front and back.
  • Stack B front and back(?)
• SOBP measurements (one type only?):
  • Stack A front and back.
  • Stack B front and back(?)

Experiment Notes

Stack A + NUC PC.

Beam current nominally 1nA.

Range in eye tissue of 60MeV: 29.3mm

Degrader WET given in eye tissue water equivalent thickness. Multiply degrader WET by 1.05 to get actual WET.

For modulator measurements, Range is 29.3mm minus degrader. Modulation is eye tissue WET difference between Range and minimum range.

Run number	Beam Energy (MeV)	Dose Rate (MU/min)	Estimated Range in Eye (mm)	Spot size (mm, FWHM)	Degrader Eye WET (mm)	DDC232 FSR (pC)	DDC232 Integration Time (us)	Measurements	Comments	Photodiode QB Fit	Replay Fit
0	Background	-	-	N/A	-	12.5	170 (constant)	30,000		N/A
1	60	20	29.3	34	0	12.5	170 (constant)	30,000		N/A
2	60	20	29.3	34	0	12.5	170 (constant)	30,000		N/A
3	60	20	29.3	34	0	12.5	170 (constant)	30,000		N/A
4	60	20	28.3	34	1	12.5	170 (constant)	30,000		N/A
5	60	20	27.3	34	2	12.5	170 (constant)	30,000		N/A
6	60	20	26.3	34	3	12.5	170 (constant)	30,000		N/A
7	60	20	25.3	34	4	12.5	170 (constant)	30,000		N/A
8	60	20	24.3	34	5	12.5	170 (constant)	30,000		N/A
9	60	20	23.3	34	6	12.5	170 (constant)	30,000		N/A
10	60	20	22.3	34	7	12.5	170 (constant)	30,000		N/A
11	60	20	21.3	34	8	12.5	170 (constant)	30,000		N/A
12	60	20	20.3	34	9	12.5	170 (constant)	30,000		N/A
13	60	20	19.3	34	10	12.5	170 (constant)	30,000		N/A
14	60	20	17.3	34	12	12.5	170 (constant)	30,000		N/A
15	60	20	15.3	34	14	12.5	170 (constant)	30,000		N/A
16	60	20	13.3	34	16	12.5	170 (constant)	30,000		N/A
17	60	20	11.3	34	18	12.5	170 (constant)	30,000		N/A
18	60	20	9.3	34	20	12.5	170 (constant)	30,000		N/A
19	60	20	29.3	34	0	12.5	170 (constant)	100,000		N/A
20	60	20	28.8	34	0.6	12.5	170 (constant)	100,000	Modulator reference: 292/92. Range (mm eye tissue): 28.8; Modulation (mm eye tissue): 14.1	N/A
21	60	20	27.3	34	2	12.5	170 (constant)	100,000	Modulator reference: 132/19. Range (mm eye tissue): 27.3; Modulation (mm eye tissue): 27.3	N/A
22	60	20	29.3	34	0	12.5	170 (constant)	100,000	Modulator reference: 769/02. Range (mm eye tissue): 29.3; Modulation (mm eye tissue): 29.3	N/A
23	60	20	23.9	34	5.4	12.5	170 (constant)	100,000	Modulator reference: 172/91. Range (mm eye tissue): 23.9; Modulation (mm eye tissue): 16.5	N/A
24	60	20	5.6	34	23.8	12.5	170 (constant)	100,000	Modulator reference: 770/02. Range (mm eye tissue): 5.6; Modulation (mm eye tissue): 5.6	N/A
25	60	50	29.3	34	0	50	170 (constant)	30,000		N/A

Brass Beam Nozzle Measurements

• Nozzle Dimensions:
  • Diameter 40.06mm
  • Length: 40mm
• Nozzle Pin Dimensions:
  • Diameter 3.0mm
  • Length pin: 10mm
  • Pin protrudes 4.0mm from the end of the nozzle