Proton Calorimetry/Experimental Runs/2018/Nov16-18

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2 night shifts with range calorimeter and single PMT module.

Equipment List

Item Notes
Network Hub Set in control room to take output from experimental room ethernet switcher. Control laptops connected via ethernet or 5GHz WiFi.
Control Laptop x2
DAQ desktop PC
Ethernet Switcher Set in experiment room and connected DAQ desktop PC. Output sent to control room Network Hub.
Ethernet Cable x 5 To connect DAQ PC to switcher, switcher to Network Hub (long cable), 2 laptops to Network Hub, if scope: scope to switcher.

Range Detector Experiment

RangeExperiment.png

Item Notes
Portable Enclosure Modified Big Zarges Waterproof Wheeled Equipment Case.

Features mount for scintillator and PMT, opening for beam, and ports for SHV, BNC, SMA, Camera Link cables.
Hole for sensor powering.
Mylar window with Al support mounted to internal face: approximately light-tight.

Scintillator stack 14 x 2 mm, 15 x 2.6 mm and 20 x 3 mm sheets in ascending order from the front/beam of the end of the scintillator. Sheet 21 not used. Sheet numbers from front to end (in beam direction): 30,29,28,27,26,22,19,18,17,15,14,13,10,7,25,24,23,20,16,12,11,9,8,6,5,4,3,2,1,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50.
ISDI CMOS sensor sensor pixel dimension: 1030 x 1536. NO optical grease between scintillator and sensor. Connected to DAQ PC via Camera Link cable.
DAQ desktop PC Controls sensor aquisition.
Gloves For handling scintillator

Single Module Experiment

SingleModuleExperiment.png

Item Notes
Portable Enclosure Modified Big Zarges Waterproof Wheeled Equipment Case.

Features mount for scintillator and PMT, opening for beam, and ports for SHV, BNC, SMA, Camera Link cables.
Hole for sensor powering.
Mylar window with Al support mounted to internal face: approximately light-tight.
BNC output from case connected to BNC to SMA adaptor.

Single Module Scintillator Blocks x5 1cm/3cm/5cm x 10cm x 10cm standard scintillator block. Optical gel required to couple Scintillator to PMT. 5cm and 3cm with black wrapping. 5cm, 3cm, 1cm mylar wrapping.
Photomultiplier Tube Hamamatsu R13089 2"
Caen DT5751 Digitiser Records PMT output, connected via SMA-MCX conversion. Used channel 3.
Caen NDT1470 HV Supply Supplies HV to PMT
USB Cable Caen units to DAQ PC
DAQ desktop PC Controls Caen HV supply; records data from Caen digitiser.
Male-to-Male SMA Cable x3 Signal from enclosure port to digitiser. Short/Light and Long cables connected via SMA to SMA connector.

If scope used: SMA splitter + SMA cable + SMA to BNC adaptor used to split the input signal and send it both to scope and digitiser.

DC-4200 MHz Signal Splitter Splits SMA signal to two SMA signals – sent to Oscilloscope and Digitiser.
Female-to-Female SMA Connector Connects Long SMA cable to Short/Light SMA cable.
Female-to-Female BNC to SMA Connector x2 From case to SMA cable (or splitter); From SMA cable to scope.
Male SMA to Male MCX Adaptor Sends output from SMA cable to Digitiser
Gloves For handling scintillator
Optical gel For coupling scintillator to PMT
Wipes For removing optical gel

Experiment List

16–17th November

Range calorimeter measurements with ISDI sensor + scintillator stack.

  1. Helium:
    1. Background measurement.
    2. Intensity check with 50.57 MeV/u pristine Bragg peak.
    3. Shoot-through at 220.51 MeV/u for sensor intensity calibration.
    4. Individual range measurements from 50.57 MeV/u (2.287cm) to 110 mm (=122.3 MeV/u) range:
      1. 5mm steps from min to max.
      2. 10 x 1mm steps from 50.57MeV/u upwards. (10 lowest energy steps; 50.57MeV/u, 51.79MeV/u, 52.97,54.14,55.30, 56.44, 57.54,58.64,59.74,60.80 MeV/u = 2.287, 2.388,2.488,2.587,2.587,2.788,2.887,2.987,3.088,3.187 cm)
      3. 10 x 1mm steps from ~100mm downwards. (the 10 step down from 115.9 MeV: Ranges : 10.09,99.89,9.889,9.789,9.689,9.589,9.489,9.388,9.289,9.189)
    5. SOBP with single pixel stripe in single acquisition.
  2. Carbon:
    1. Background measurement.
    2. Intensity check with 88.83 MeV/u pristine Bragg peak.
    3. Shoot-through at 430.10 MeV/u for sensor intensity calibration.
    4. Individual range measurements from 88.83 MeV/u to 110 mm range:
      1. 5mm steps from min to max.
      2. 10 x 1mm steps from 88.83 MeV/u upwards.
      3. 10 x 1mm steps from ~100mm downwards.
    5. SOBP with single pixel stripe in single acquisition.
  3. Proton:
    1. Background measurement.
    2. Intensity check with 48.12 MeV pristine Bragg peak.
    3. Shoot-through at 221.06 MeV/u for sensor intensity calibration.
    4. Individual range measurements from 48.12 MeV/u to 110 mm range:
      1. 5mm steps from min to max.
      2. 10 x 1mm steps from 48.12 MeV/u upwards.
      3. 10 x 1mm steps from ~100mm downwards.
    5. SOBP with single pixel stripe in single acquisition.
    6. Position scan at 100mm with 30mm transverse offset in both positive and negative x.

Oxygen measurements planned but not requested:

  1. Background measurement.
  2. Intensity check with 103.77 MeV pristine Bragg peak.
  3. Shoot-through at 514.82 MeV/u for sensor intensity calibration.
  4. Individual range measurements from 103.77 MeV/u to 110 mm range:
    1. 5mm steps from min to max.
    2. 10 x 1mm steps from 103.77 MeV/u upwards.
    3. 10 x 1mm steps from ~100mm downwards.
  5. SOBP with single pixel stripe in single acquisition.

17–18th November

Range calorimeter measurements with ISDI sensor + scintillator stack

  1. Helium:
    1. Background measurement.
    2. Intensity check with 50.57 MeV/u pristine Bragg peak.
    3. Shoot-through at 220.51 MeV/u for sensor intensity calibration.
    4. SOBP measurements:
      1. Correct SOBP measurement with 100mm distal edge using equal particle rate but clinical weighting for each layer with 3x3 spot grid.
      2. Correct SOBP measurement with 100mm distal edge using clinical weighting with approx. equal time to deliver each each layer with single on-axis spot.
      3. Faked SOBP measurement with 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot.
      4. Both measurements SOBP with single pixel stripe in single acquisition: 6x1,536 pixel area; approx 1m50s acquisition time.
  2. Mixed particle tests:
    1. Carbon clinical SOBP with 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid.
    2. Carbon faked SOBP with 100mm distal edge using equal particle rate and equal weighting for each layer with single on-axis spot for 10 layers with 3mm layer spacing.
    3. Helium replica of 100mm Carbon clinical SOBP (260mm distal edge) with 10 layers with 8/9mm layer spacing (closest approximation of 3mm Carbon layer spacing); equal particle rate with clinical weighting and 3x3 spot grid.
    4. Helium replica of 100mm Carbon faked SOBP (260mm distal edge) using equal particle rate and equal weighting for each layer with single on-axis spot for 10 layers with 8/9mm layer spacing.
    5. Repeat measurements with 50mm PMMA sheets until Helium SOBP fully contained in detector.
    6. Add 30mm PMMA sheet and repeat Helium measurements in small transverse steps (tumour motion simulation).

Single module

All tests with Helium.

  1. 30mm thick scintillator sheet: check max signal height and replace with black wrapped sheet if signal too large. 22mm Helium range so Bragg peak fully contained in scintillator.
  2. Increase rate from kHz up to MHz to identify maximum safe particle rate. Observe effect of PMT current saturation.
  3. Increase Helium energy from 22mm up to ~260mm in 10mm range steps.
  4. 1mm range steps from 22mm to 32mm.
  5. 1mm range steps from 190mm to 200mm.
  6. Investigate effect of upstream degrader material.

Experiment Log

PMMA blocks are 50mm thick. Water Equivalent Thickness is 57.81mm.

Beam Tests

16–17th November

Beam focus ranges from step 1 (smallest) to step 4 (of 6).

Helium ion beam

full sensor area

Run number Full Well Mode Beam Energy (MeV/u) Range (estimated) N particles Spot size (mm) Test type Comments Thumbnail
N well mode Energy MeV/u Range particles Spot FWHM test comments
00 None None - None None - background
01 low 50.57 22.9 10^8 18.6 He low energy, low intensity
02 high 50.57 22.9 8x10^8 18.6 He low energy, max clinical intensity
03 high 220.51 308.3 8x10^8 4.9 He 50mm PMMA absorber upstream, shoot-through
04 high 220.51 308.3 8x10^8 4.9 He (same as 3) 50mm PMMA absorber upstream, shoot-through
05 high 220.51 308.3 8x10^8 4.9 He (same as 3) 50mm PMMA absorber upstream, shoot-through
high 122.3 110.9 8x10^8 8.0 He range measurement was saturated, not saved
06 high 122.3 110.9 5x10^8 8.0 He range measurement, max range
07 high 122.3 110.9 5x10^8 8.0 He (same as 6) range measurement, max range
08 high 119.15 105.9 5x10^8 12.0 He range measurement 5mm step
09 high 119.15 105.9 5x10^8 12.0 He (same as 8) range measurement 10mm step
10 high 115.93 100.9 5x10^8 12.2 He range measurement 10mm step
11 high 109.28 90.9 5x10^8 12.5 He range measurement 10mm step
12 high 102.34 80.9 5x10^8 12.8 He range measurement 10mm step
13 high 95.02 70.9 5x10^8 13.3 He range measurement 10mm step
14 high 87.25 60.9 5x10^8 13.9 He range measurement 10mm step
15 high 78.92 50.9 3x10^8 14.7 He range measurement 10mm step
16 high 69.84 40.9 3x10^8 13.3 He range measurement 10mm step
17 high 60.8 31.9 3x10^8 15.4 He range measurement 10mm step
18 high 60.8 31.9 5x10^8 15.4 He range measurement 10mm step
19 high 59.74 30.9 5x10^8 15.7 He range measurement 1mm step
20 high 58.7 29.9 5x10^8 16.0 He range measurement 1mm step
21 high 57.55 28.9 5x10^8 16.3 He range measurement 1mm step
22 high 56.44 27.9 5x10^8 16.7 He range measurement 1mm step
23 high 55.30 26.9 5x10^8 17.0 He range measurement 1mm step
24 high 55.30 26.9 8x10^8 17.0 He (same as 23) range measurement 1mm step
25 high 54.15 25.9 8x10^8 17.4 He range measurement 1mm step
26 high 52.98 24.9 8x10^8 17.8 He range measurement 1mm step
27 high 51.79 23.9 8x10^8 18.2 He range measurement 1mm step
28 high 50.97 22.9 8x10^8 18.6 He range measurement 1mm step
29 high 122.3 110.9 5x10^8 8.0 He high energy range measurement, 1mm step
30 high 121.68 109.9 5x10^8 8.0 He high energy range measurement, 1mm step
31 high 121.05 108.9 5x10^8 8.1 He high energy range measurement, 1mm step
32 high 120.42 107.9 5x10^8 8.1 He high energy range measurement, 1mm step
33 high 119.78 106.9 5x10^8 8.1 He high energy range measurement, 1mm step
34 high 119.15 105.9 5x10^8 8.2 He high energy range measurement, 1mm step
35 high 118.51 104.9 5x10^8 8.2 He high energy range measurement, 1mm step
36 high 117.87 103.9 5x10^8 8.2 He high energy range measurement, 1mm step
37 high 117.23 102.9 5x10^8 8.3 He high energy range measurement, 1mm step
38 high 116.58 101.9 5x10^8 8.3 He high energy range measurement, 1mm step
39 high 115.93 100.9 5x10^8 8.3 He high energy range measurement, 1mm step
40 high 50.57 100.9 8x10^8 8.3 He min range repetition
41 high 122.3 110.9 5x10^8 8.0 He max range
high 96.52 - 115.93 72.9 - 100.9 3x10^8 9.7 - 8.3 He SOBP, 29 x 1mm steps. Observed, not saved
42 None None - None None - background 6 pixel rows (512 offset)
43 high 96.52 - 115.93 72.9 - 100.9 3x10^8 9.7 - 8.3 He SOBP, 29 x 1mm steps 6 pixel rows (512 offset)

Carbon ion beam

full sensor

Run number Full Well Mode Beam Energy (MeV/u) Range (estimated) N particles Spot size (mm) Test type Comments Thumbnail
N well mode Energy MeV/u Range particles Spot FWHM test comments
44 high None - None None - background
45 low None - None None - background
Beam off for 30 min - - - - C -
46 low 88.83 21.1 3x10^7 9.8 C low energy, low intensity
47 low 430.1 309.4 3x10^7 3.4 C 50mm PMMA absorber upstream, shoot-through
48 low 217.25 100.4 3x10^7 4.8 C range scan
49 low 204.27 90.4 3x10^7 5.0 C range scan
50 low 190.75 80.4 3x10^7 5.3 C range scan
51 low 176.56 70.4 3x10^7 5.7 C range scan
52 low 161.55 60.4 3x10^7 6.1 C range scan
53 low 145.47 50.3 3x10^7 6.7 C range scan, Saturated
54 low 145.47 50.3 2x10^7 6.7 C range scan
55 low 127.96 40.2 2x10^7 7.5 C range scan
56 low 108.53 30.1 2x10^7 8.5 C range scan
57 low 106.45 29.0 3x10^7 8.6 C range scan, 10 steps
58 low 104.35 28.0 3x10^7 8.8 C range scan, 10 steps
59 low 102.22 27.0 3x10^7 8.9 C range scan, 10 steps
60 low 100.07 26.0 3x10^7 9.0 C range scan, 10 steps
61 low 97.88 25.0 3x10^7 9.2 C range scan, 10 steps
62 low 95.67 24.0 3x10^7 9.3 C range scan, 10 steps
63 low 91.42 23.0 3x10^7 9.5 C range scan, 10 steps
64 low 91.14 22.1 3x10^7 9.6 C range scan, 10 steps
65 low 88.83 21.1 3x10^7 9.8 C range scan, 10 steps
66 low 204.27 90.4 3x10^7 5.0 C range scan 10 steps
67 low 205.60 91.4 3x10^7 5.0 C range scan 10 steps
68 low 206.91 92.4 3x10^7 5.0 C range scan 10 steps
69 low 208.22 93.4 3x10^7 4.9 C range scan 10 steps
70 low 209.53 94.4 3x10^7 4.9 C range scan 10 steps
71 low 210.83 95.4 3x10^7 4.9 C range scan 10 steps
72 low 212.12 96.4 3x10^7 4.9 C range scan 10 steps
73 low 213.41 97.4 3x10^7 4.8 C range scan 10 steps
74 low 214.70 98.4 3x10^7 4.8 C range scan 10 steps
75 low 215.98 99.5 3x10^7 4.8 C range scan 10 steps
76 low 217.25 100.4 3x10^7 4.8 C range scan 10 steps
77 low 88.83 21.1 3x10^7 9.8 C range scan 10 steps
78 low None - None None - background

Proton beam

full sensor

Run number Full Well Mode Beam Energy (MeV/u) Range (estimated) N particles Spot size (mm) Test type Comments Thumbnail
N well mode Energy MeV/u Range particles Spot FWHM test comments
79 high None - None None - background
80 high 221.06 308.1 3.2x10^9 8.1 p 50mm PMMA absorber upstream, shoot-through
81 high 48.92 20.8 3.2x10^9 32.4 p low energy, low intensity
82 high 121.95 109.7 1.2x10^9 13.2 p range scan
83 high 115.55 99.8 1.2x10^9 13.8 p range scan
84 high 108.88 89.8 1.2x10^9 14.5 p range scan
85 high 101.9 79.8 1.2x10^9 15.5 p range scan
86 high 94.94 69.9 1.2x10^9 16.6 p range scan
87 high 86.72 59.9 1.2x10^9 18.2 p range scan
Range to be checked - - - - - p range
88 high 78.3 49.9 1.2x10^9 20.2 p range scan
89 high 78.3 49.9 8x10^8 20.2 p range scan
90 high 69.06 39.8 8x10^8 23.9 p range scan
91 high 58.72 29.8 8x10^8 27.3 p range scan
Range to be checked - - - - - p range
92 high 78.3 49.9 8x10^8 20.2 p range scan
93 high 69.06 39.8 8x10^8 23.9 p range scan
94 high 69.06 39.8 1.2x10^9 23.9 p range scan
95 high 58.72 29.8 1.2x10^9 27.3 p range scan
96 high 57.61 28.8 1.2x10^9 27.8 p range scan
97 high 56.49 27.8 1.2x10^9 28.3 p range scan 1mm scan
98 high 54.34 26.8 1.2x10^9 28.9 p range scan
99 high 54.19 25.8 1.2x10^9 29.4 p range scan
100 high 53.09 24.8 2x10^9 30.0 p range scan
101 high 51.82 23.8 3.2x10^9 30.7 p range scan
102 high 50.60 22.8 3.2x10^9 31.3 p range scan
103 high 49.37 21.8 3.2x10^9 31.9 p range scan
104 high 48.12 20.8 3.2x10^9 32.4 p range scan
105 high 115.55 99.8 1.2x10^9 13.8 p range scan
106 high 116.20 100.8 1.2x10^9 13.7 p range scan
107 high 116.85 101.8 1.2x10^9 13.7 p range scan
108 high 117.50 102.8 1.2x10^9 13.6 p range scan
109 high 118.14 103.7 1.2x10^9 13.6 p range scan
110 high 118.78 104.7 1.2x10^9 13.5 p range scan
111 high 119.42 105.7 1.2x10^9 13.4 p range scan
112 high 120.05 106.7 1.2x10^9 13.4 p range scan
113 high 120.69 107.7 1.2x10^9 13.3 p range scan
114 high 121.32 108.7 1.2x10^9 13.3 p range scan
115 high 121.95 109.7 1.2x10^9 13.2 p range scan
116 high 125.06 114.7 1.2x10^9 12.9 p range scan
117 high 128.99 119.7 1.2x10^9 12.7 p range scan
118 high None - None None - background
119 high 115.55 99.8 1.2x10^9 13.8 p spot scan on axis
120 high 115.55 99.8 1.2x10^9 13.8 p spot scan (2cm shift on the left)
121 high 115.55 99.8 1.2x10^9 13.8 p spot scan (2cm shift on the right)

17–18th November

Beam focus ranges from step 1 (smallest) to step 4 (of 6).

Helium ion beam

full sensor area

Run number Full Well Mode Beam Energy (MeV/u) Range (estimated) N ions /s Spot size (mm) Test type Comments Thumbnail
N well mode Energy MeV/u Range ions/s Spot FWHM test comments
00 high None - None None - background
01 high 50.57 22.9 8x10^8 18.6 He low energy, max clinical intensity
- - - - - - New alignment
02 high 220.51 308.3 8x10^8 4.9 He 50mm PMMA absorber upstream, shoot-through
03 high None - None None - background
04 high 50.57 22.9 8x10^8 18.6 He low energy, max clinical intensity
05 high 96.52 - 115.93 72.9 - 100.9 3x10^8 9.7 - 8.3 He SOBP, 6 pixel rows (512 offset), 100mm distal edge using equal particle rate but clinical weighting for each layer with 3x3 spot grid
06 high None - None None - background 6 pixel rows (512 offset)
07 high 96.52 - 115.93 72.9 - 100.9 3x10^8 9.7 - 8.3 He Clinical SOBP, 6 pixel rows (512 offset), 100mm distal edge using clinical weighting with approx. equal time to deliver each layer with single on-axis spot; (Saturated)
08 high 96.52 - 115.93 72.9 - 100.9 5x10^8 9.7 - 8.3 He Faked SOBP, 4 pixel rows (513 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot.

Mixed Helium and Carbon ions beam

full sensor

Run number Full Well Mode Beam Energy (MeV/u) Range (estimated) N particles Spot size (mm) Test type Comments Thumbnail
N well mode Energy MeV/u Range particles Spot FWHM test comments
09 high 182.32 - 222.31 74.4 - 104.5 - 5.5 - 4.7 C Real Clinical SOBP, 6 pixel rows (512 offset), 100mm distal edge using clinical weighting with approx. equal time to deliver each layer with single on-axis spot.
10 high 182.32 - 222.31 74.4 - 104.5 8x10^7 5.5 - 4.7 C Clinical SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid.
11 high None - None None - background, 10 pixel rows (510 offset)
12 high 182.32 - 222.31 74.4 - 104.5 8x10^7 5.5 - 4.7 C Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing.
13 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Clinical SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid.
14 high None - None None - background, 10 pixel rows (510 offset)
15 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He PROBLEMATIC RUN! Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing.
16 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing.
17 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing. 50mm PMMA absorber
18 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Clinical SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid. 50mm PMMA absorber
19 high 182.32 - 222.31 74.4 - 104.5 8x10^7 5.5 - 4.7 C Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing. 50mm PMMA absorber
20 high 182.32 - 222.31 74.4 - 104.5 8x10^7 5.5 - 4.7 C Clinical SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid. 50mm PMMA absorber
21 high 430.1 309.4 8x10^7 3.4 C Full sensor, 50mm PMMA absorber upstream, shoot-through
22 high 220.51 308.3 8x10^8 4.9 He Full sensor, 50mm PMMA absorber upstream, shoot-through
23 high 182.32 - 222.31 74.4 - 104.5 8x10^7 5.5 - 4.7 C Clinical SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid. 2x50mm PMMA absorber
24 high 182.32 - 222.31 74.4 - 104.5 8x10^7 5.5 - 4.7 C Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing. 2x50mm PMMA absorber
25 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing. 2x50mm PMMA absorber
26 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Clinical SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid. 2x50mm PMMA absorber
27 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Clinical SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid. 3x50mm PMMA absorber
28 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing. 3x50mm PMMA absorber
29 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing. 3x50mm + 1x27mm PMMA absorber
30 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Clinical SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid. 3x50mm + 1x27mm PMMA absorber
31 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Clinical SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate but clinical weighting for 15 layers with 2mm range spacing and 3x3 spot grid. From the box 2x50mm + 1x27mm + 1x50mm + 1x30mm PMMA absorber
32 high 188.07 - 220.51 78.8 - 308.3 3x10^8 5.3 - 4.9 He Faked SOBP, 10 pixel rows (510 offset), 100mm distal edge using equal particle rate and equal weighting for each spot with single on-axis spot for 10 layers with 3mm layer spacing. From the box 2x50mm + 1x27mm + 1x50mm + 1x30mm PMMA absorber

To BE UPDATED Single Module

PMT Current at HV supply -900 V, beam off: 150 μA

Tracker data indicates beam horizontal offset of 12mm; vertical offset of 1.3mm.

  • The tests were carried out with an energy of 252.7 MeV with a 5 second beam spill and six different beam intensities.
  • The digitiser always operated in Self Trigger mode.
  • Differences since last medAustron test beam:
    • Short cables used for signals and SMA instead of BNC, controlling the acquisition remotely.
    • Tests carried out at a range of HVs.
  • Working directory where digitiser data is stored:

C:\Users\abf\Desktop\digitiser_data\medAustron\mar18\ham

Run number High Voltage, V PMT Current, uA Beam Intensity Rate (Measured on Digitiser) Digitiser Settings and Notes
N/A -900 150.1 (beam off) N/A N/A DC Offset: 0, Rec. Length: 396 ns, Threshold: 40 LSB, Gate Offset: 1 ns, Long Gate: 396 ns, BL Mean: 8 ns, Charge. Sensitivty: 20 fC/LSB, Pre-trigger: 9 ns
001 -900 150.1 Lowest 0.3 - 5 kHz DC Offset: -30, Threshold: 40 LSB, Gate Offset: 20 ns, Long Gate: 150 ns
006 -500 82.6 Lowest 0.3 - 5 kHz Threshold: 10 LSB. Too close to the threshold, but cannot lower more due to noise floor.
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