Proton Calorimetry/Experimental Runs/2015/Jul8-9

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Include all details of experimental runs from Anastasia's PDFs.

PAGE UNDER CONSTRUCTION

Contents

Day 1 (July 8th)

Notes

  • Current at -800 V: 129.6 μA (beam off)
  • Background rate (-800 V on PMT, beam off, no collimator): ~5 Hz - 4 Hz
    • Threshold: -14 mV (for 10 segments)
    • Rise time: 8 - 14 ns (<14 ns)
  • Having the corridor lights on does NOT create enough light to trip PMT and is acceptable
  • For treatment, 8 mm - 20 mm collimator used

Negative Base Tests

High Voltage (V) Trigger Rate + Additional Information Electronics Setup Collimator Size + Additional Information Run Number
-800 ST Rate: 50 Hz
  • 2 mm
  • 0.6 cc/minute
  • 0 arc current
Rate: 500 kHz
  • 0.6 cc/current
  • Tiny bit of arc
  • Dose: 3.9
Rate: ~200 kHz
  • Rec. length: 304 ns
  • BL mean: 32
  • Charge Sens.: 20 fC/LSB
  • 0.6 cc/minute
  • 0.6 dose (less arc)
  • Unstable
-800 ST Rate: 50 Hz
  • Threshold: 40 LSB
  • Gate offset: 20 ns
  • Short gate: 70 ns
  • Long gate: 100 ns
  • 0.6 cc/minute
  • 0 arc current
  • 0 dose
001 (60,000 events)
-800 ST, list
  • Rate: 330 Hz
  • I: 129.6 μA
  • Short gate: 70 ns
  • Long gate: 100 ns
5 mm 002 (71,000 events)
-800 ST, list
  • Rate: 1.1 kHz
  • I: 129.6 μA
  • Short gate: 70 ns
  • Long gate: 100 ns
8 mm 003 (350,000 events)
40 MeV protons, therefore trigger on 14 mV is ~5%, usually require 10%. Trigger on 30 mV threshold from now on.
Lunch break
-800 ST, list
  • Rate: 1.6 kHz
  • I: 129.7 μA
  • Short gate: 70 ns
  • Long gate: 100 ns
16 mm 005 (350,000 events)
-800 ST, list As above, repeated to study shoulder at ~2500 ADC 006 (300,000 events)
-800 ST, list
  • Rate: 4.2 kHz
  • I: 129.775 μA
  • Short gate: 70 ns
  • Long gate: 100 ns
20 mm 007 (400,000 events)
-800 ST, list
  • Rate: 7.1 kHz - 6 kHz
  • I: 129.77 μA
  • Short gate: 70 ns
  • Long gate: 100 ns
24 mm 008 (400,000 events)
-800 ST, list
  • Rate: 4.5 kHz - 5 kHz
  • I: 129.76 μA
  • Short gate: 70 ns
  • Long gate: 100 ns
30 mm 009 (400,000 events)
-800 ST, list
  • Rate: 500 kHz
  • I: 150 μA
  • Short gate: 70 ns
  • Long gate: 100 ns
  • 2 mm
  • 0.6 cc/minute
  • Dose: 2.5
  • Arc current: 0.5 mA
010 (1,500,000 events)
-800 ST, list
  • Rate: 300 kHz
  • I: 138 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
  • 0.1 cc/minute
  • Arc current: 0.1 mA
  • 1.0 dose
012 (1,500,000 events
-800 ST, list All as above, but create larger statistics 014 (3,000,000 events)
-800 ST, list
  • Rate: 100 kHz
  • I: 131.7 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
  • 0.3 dose
  • Gas at lowest
  • Current at lowest
016 (1,500,000 events)
-800 ST, list
  • Rate: 217 kHz
  • I: 136 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
4 mm 017 (3,000,000 events)
-800 ST, list
  • 150 kHz
  • I: 133.2 μA
  • Short gate: 50 ns
  • Long gat: 100 ns
3 mm 018 (3,000,000 events)
-800 ST, list
  • Rate: 382 kHz
  • I: 146.4 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
5 mm 019 (5,000,000 events)
-800 ST, list
  • Rate: 520 kHz
  • I: 149.5 μA
  • Note: May have shifted very slighly during running
  • Short gate: 50 ns
  • Long gate: 100 ns
6 mm 020 (list), 021 (eh) (5,000,000 events)
-800 ST, list
  • Rate: 454 kHz
  • I: 147-148 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
Voltage changed on Ds: 47.4% 025 (list), 027 (eh) (4,000,000 events)
-800 ST, list
  • Rate: 625 kHz
  • I: 157 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
Voltage on Ds changed back 028 (3,000,000 events)
-800 ST, list All as above, take second for crosscheck 029 (2,300,000 events)
-800 ST, list
  • Rate: 800 kHz
  • I: 162.2 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
6.99 mm 030 (3,000,000 events)
-800 ST, list
  • Short gate: 40 ns
  • Long gate: 60 ns
039 (4,000,000 events)
-800 ST, list
  • Rate: 180 kHz
  • I: 134 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
  • 2 mm
  • Dose: 0.5 - 0.6
  • 0.1 cc/minute
044 (3,500,000 events)
-800 ST, list
  • Rate: 250 kHz
  • I: 136.5 &mu'A
  • Short gate: 50 ns
  • Long gate: 100 ns
  • 0.7-0.8 cc/minute
  • 0.1 mA arc current
045 (4,000,000 events)
-800 ST, list
  • Rate: 360 kHz
  • Rate: 143 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
  • 1.8 cc/minte (treatment level)
  • 0.1 mA arc current
046 (4,000,000 events)
-800 ST, list
  • Rate: 450 kHz
  • I: 146.5 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
  • 1.8 cc/minute
  • 0.15 mA arc current
049 (4,000,000 events)
-800 ST, list
  • Short gate: 70 ns
  • Long gate: 100 ns
051 (4,000,000 events)
-800 ST, list
  • Short gate: 80 ns
  • Long gate: 100 ns
053 (4,000,000 events)
-800 ST, list
  • Short gate: 90 ns
  • Long gate: 100 ns
054 (4,000,000 events)
-800 ST, list
  • Rate: 530 kHz
  • I: 149 μA
  • Short gate: 90 ns
  • Long gate: 100 ns
056 (4,000,000 events)
-800 ST, list
  • Short gate: 80 ns
  • Long gate: 100 ns
057 (4,000,000 events)
-800 ST, list
  • Rate: 520-530 kHz
  • Note: Not best looking run. Rate stable, but somethign going on with with beam and peak shifting etc.
  • Short gate: 70 ns
  • Long gate: 100 ns
0.5 cc/minute 065 (4,000,000 events)

Day 2 (July 9th)

Notes

  • From the morning of 9th July 2015 measurements taken without the black cloth covering the face of the scintillator.
  • Dark rates have increased to ~6.5 Hz (for a -30 mV threshold)
  • Current for dark rate: 129.66 μA
  • Distance between beam and EJ-Block scintillator: ~40 mm
  • No dark rate, background pickup up with beam off due to such a small scintillator size.
  • At 1450 V, I: 324 μA, but still no visible signal. Wrong PMT connected to signal.

With correct PMT:

  • At 800 V dark current + background rate: ~40 Hz at -30 mV threshold, I: 178.6 μA
  • At 1000 V, dark current + background rates: 600 Hz at -30 mV threshold

Negative Base Tests

High Voltage (V) Trigger Rate + Additional Information Electronics Setup Collimator Size + Additional Information Run Number
-800 ST, list
  • Rate: ~50 kHz
  • I: 130.3 μA
  • Note: Very unstable rate!
  • Short gate: 70 ns
  • Long gate: 100 ns
  • 2 mm
  • 0.1 cc/minute
  • 0.1 arc current
  • 0.1 dose rate
068 (2,000,000 events)
-800 ST, list
  • Short gate: 50 ns
  • Long gate: 100 ns
Unable to take run, too much instability
-800 ST, list
  • Rate: 60 kHz
  • I: 131 μA
  • Note: Still unstable!
  • 0.6 cc/minute
  • 0.2 dose rate
  • Minimum arc current
No run, unstable
-800 ST, list Rate: 100 kHz, unstable
  • 0.6 cc/minute
  • 0.1 mA arc current
  • 0.8 dose rate
No run, unstable
-800 ST, list
  • Rate: 500 Hz - 2 kHz
  • I: 129.74 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
  • 10 mm
  • 0.6 cc/minute
  • 0 arc current
  • Note: These seem to be the best settings for a stable low rate run.
075 (250,000 events)
-800 ST, list
  • Short gate: 70 ns
  • Long gate: 100 ns
076 (250,000 events)
-800 ST, list
  • Short gate: 80 ns
  • Long gate: 100 ns
077 (230,000 events)
-800 ST, list
  • Short gate: 90 ns
  • Long gate: 100 ns
078 (230,000 events)
-800 ST, waves
  • Short gate: 90 ns
  • Long gate: 100 ns
079 (Waveforms)
-800 ST, list
  • Rate: 200 kHz - 300 kHz
  • I: 135-136 μA to 142 μA
  • Note: Unstable rates!
  • Short gate: 90 ns
  • Long gate: 100 ns
  • 2 mm
  • 0.6 cc/minute
  • 0.1 mA arc current
  • 0.7 dose
081 (2,000,000 events)
-800 ST, list
  • Short gate: 80 ns
  • Long gate: 100 ns
085 (2,000,000 events)
-800 ST, list
  • Short gate: 70 ns
  • Long gate: 100 ns
087 (2,000,000 events)
-800 ST, list Note: Run shifts towards the end
  • Short gate: 50 ns
  • Long gate: 100 ns
089 (2,000,000 events)
-800 ST, list Note: Repeat of above run, looks cleaner
  • Short gate: 50 ns
  • Long gate: 100 ns
092 (2,000,000 events)
-800 ST, waves
  • Short gate: 50 ns
  • Long gate: 100 ns
093 (Waveforms)
-800 ST, list
  • Rate: ~400 kHz
  • I: 143-144 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
  • 1.0 cc/minute
  • 0.12 mA arc current
  • 1.5 dose
095 (2,000,000 events)
-800 ST, list
  • Short gate: 70 ns
  • Long gate: 100 ns
096 (2,000,000 events)
-800 ST, list
  • Short gate: 80 ns
  • Long gate: 100 ns
097 (2,000,000 events)
-800 ST, list
  • Short gate: 90 ns
  • Long gate: 100 ns
098 (2,000,000 events)
-800 ST, list
  • Rate: ~500 kHz
  • I: 149 μA
  • Short gate: 90 ns
  • Long gate: 100 ns
  • 0.5 cc/minute
  • 0.5 mA arc current
  • 2.5 dose rate
099 (2,000,000 events)
-800 ST, list
  • Short gate: 80 ns
  • Long gate: 100 ns
100 (2,000,000 events)
-800 ST, list
  • Short gate: 70 ns
  • Long gate: 100 ns
101 (2,000,000 events)
-800 ST, list
  • Short gate: 50 ns
  • Long gate: 100 ns
102 (2,000,000 events)
-800 ST, list
  • Rate: 720 kHz
  • I: 159.5 μA
  • Short gate: 50 ns
  • Long gate: 100 ns
3 mm 105 (7,500,000 events)
-800 ST, list
  • Short gate: 70 ns
  • Long gate: 100 ns
106 (ls), 107 (eh) (7,000,000 events)
Beam tripped out
-800 ST, list
  • Short gate: 80 ns
  • Long gate: 100 ns
108 (9,000,000 events)
-800 ST, list
  • Short gate: 90 ns
  • Long gate: 100 ns
109 (ls), 110 (eh) (6,500,000 events)


3" PMT Tests

High Voltage (V) Trigger Rate + Additional Information Electronics Setup Collimator Size + Additional Information Run Number
800 ST, list
  • Rate: 200 Hz
  • I: 178.6 μA
Signal is off the ADC scale! Reduce the voltage!
  • 6 mm
  • 0.6 cc/minunte
  • 0 arc current
700 ST, list
  • Rate: 60-70 Hz
  • I: 156 μA
  • DC offset: -20
  • Rec. length: 456 ns
  • Threshold: 30 LSB
  • Gate offset: 20 ns
  • Short gate: 100 ns
  • Long gate: 300 ns
113 (165,000 events)
700 ST, list
  • Rate: 3-5 kHz
  • I: 156.4 μA
  • Note: Rate dropped during run
  • Short gate: 200 ns
  • Long gate: 300 ns
20 mm 116 (460,000 events)
700 ST, list
  • Rate: 7.7 kHz
  • I: 156.75 μA
  • Short gate: 200 ns
  • Long gate: 300 ns
5.07 mm of PMMA (1 plate) 118 (715,000 events)
700 ST, list
  • Short gate: 200 ns
  • Long gate: 300 ns
9.8 mm of PMMA (1 plate) 119 (370,000 events)
700 ST, list Repeat above measurement after beam reset
  • Short gate: 200 ns
  • Long gate: 300 ns
120 (800,000 events)
700 ST, list
  • Short gate: 200 ns
  • Long gate: 300 ns
14.12 mm of PMMA (1 plate) 121 (900,000 events)
700 ST, list
  • Short gate: 200 ns
  • Long gate: 300 ns
17.94 mm of PMMA (9.04 mm + 10.9 mm, 2 plates) 122 (950,000 events)
700 ST, list
  • Short gate: 200 ns
  • Long gate: 300 ns
19.94 mm of PMMA (9.04 mm + 10.9 mm, 2 plates) 123 (805,000 events)
700 ST, list
  • Short gate: 200 ns
  • Long gate: 300 ns
21.70 mm of PMMA (9.04 mm + 12.66 mm, 2 plates) 124 (550,000 events)
700 ST, list
  • Rate: 1.5 kHz
  • I: 156.35 μA
  • Short gate: 200 ns
  • Long gate: 300 ns
No PMMA 125 (700,000 events)
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