Proton Calorimetry/Experimental Runs/2015/Jul8-9

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

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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)