Proton Calorimetry/Experimental Runs/2018/Mar8-9

Beam tests of the UCL plastic scintillator range calorimeter.

_TOC_

Thursday 8th of March 2018

Pre-data Taking Information and Notes

• The tests were carried out with an energy of 36 MeV. A Bragg Peak measurement was carried out to confirm the exact beam energy.
• Collimators used: 2 mm and 20 mm diameter.
• PMMA sheets used: 3 mm, taped over the mylar window.
• The average background value per pixel for the sensor is ~ 2500. The sensor pixel dimensions are 1030 x 1536. The sensor frame rate was always set to 25 frames per second.
• The DSLR ISO was always set to 200.
• 6 x 3 mm scintillator sheets were used. The scintillator stack was set up in the following order, starting with the first sheet facing the beam:
  • 31, 32, 33, 34, 35, 48
• The scintillator stack was coupled to the sensor using optical gel.
• The dose received (as shown on the monitor in the control room) during the full day of measurements was:
  • With a 2 mm collimator: 746.9 uC
  • With a 20 mm collimator: 417.7 uC
  • With a 2 mm collimator + 3 mm of PMMA: 251.5 uC
• There current was variable/unstable throughout the day.
• To calculate the actual dose delivered to the scintillator:
  • / 160 -> to convert to proton current
  • / (50/ collimator diameter)^2 -> to account for reduction in area due to the collimator
• The directory containing the sensor data is:

/unix/pbt/data/birmingham/mar_2018/EPIX/XCAP/data/20180308_bham

• The directory containing the DSLR data is:

/unix/pbt/data/birmingham/mar_2018/Nikon/20180308_bham

Data Taking

Run number	DSLR Aperture	DSLR Exposure	Sensor Full Well Mode	Sensor Sequence	Beam Energy	Current on Monitor	Collimator Diameter	Comments	DSLR Thumbnail	Sensor Thumbnail
1	f/10	2 s	N/A	N/A	N/A	N/A	N/A	Beam off, lid open. Focus check for DSLR. Low light.		N/A
2	f/10	5 s	N/A	N/A	N/A	N/A	N/A	Beam off, lid open. Focus check for DSLR. Low light.		N/A
3	f/10	20 s	N/A	N/A	N/A	N/A	N/A	Beam off, lid open. Focus check for DSLR. Low light.		N/A
4	f/10	20 s	N/A	N/A	N/A	N/A	N/A	Beam off, lid open. Focus check for DSLR. Focus - okay.		N/A
5	f/5	5 s	N/A	N/A	N/A	N/A	N/A	Beam off, lid open. Focus check and background picture with white paper for DSLR.		N/A
6	f/10	5 s	Low	42 frames	N/A	N/A	N/A	Beam off, lid closed, lights off. Background run.		N/A
7	f/3.2	2 s	Low	21 frames	N/A	N/A	N/A	Beam off, lid closed, lights off. Background run.		N/A
8	f/3.2	10 s	Low	21 frames	36 MeV	1 uA	2 mm	Beam on.		N/A
9	N/A	N/A	Low	21 frames	36 MeV	1 uA	2 mm	Beam on.	N/A	N/A
10	f/3.2	10 s	Low	1 frame	36 MeV	0.8 uA	2 mm	Beam on.
11	f/3.2	10 s	Low	21 frames	36 MeV	0.8 uA	2 mm	Beam on.		N/A
12	f/3.2	10 s	Low	21 frames	36 MeV	10 nA	20 mm	Beam on.
13	f/3.2	10 s	Low	21 frames	36 MeV	20 nA	20 mm	Beam on. At this current sensor is saturated on low full well mode. Unable to switch sensor into high full well mode so no sensor data taken until a return to low currents.
14	f/3.5	10 s	N/A	N/A	36 MeV	50 nA	20 mm	Beam on.		N/A
15	f/3.5	5 s	N/A	N/A	36 MeV	60 nA	20 mm	Beam on.		N/A
16	f/3.5	2 s	N/A	N/A	36 MeV	100 nA	20 mm	Beam on.		N/A
17	f/3.5	1 s	N/A	N/A	36 MeV	100 nA	20 mm	Beam not caught on image.		N/A
18	f/3.5	1 s	N/A	N/A	36 MeV	100 nA	20 mm	Some beam caught on image.		N/A
19	f/3.5	1 s	N/A	N/A	36 MeV	100 nA	20 mm	Beam on.		N/A
20	f/4	1 s	N/A	N/A	36 MeV	200 nA	20 mm	Variable beam current.		N/A
21	f/4	1 s	N/A	N/A	36 MeV	260 nA	20 mm	Beam on.		N/A
22	f/4	1 s	N/A	N/A	36 MeV	260 nA	20 mm	Beam on.		N/A
23	f/4.5	1 s	N/A	N/A	36 MeV	500 nA	20 mm	Beam on.		N/A
24	f/4.5	1/2 s	N/A	N/A	36 MeV	500 nA	20 mm	Beam on.		N/A
25	f/3.2	1/2 s	N/A	N/A	36 MeV	800 nA	20 mm	Beam on. Saturation test for DSLR.		N/A
26	f/6.3	1/2 s	N/A	N/A	36 MeV	800 nA	20 mm	Some beam caught on image.		N/A
27	f/6.3	1/2 s	N/A	N/A	36 MeV	850 nA	20 mm	Beam on.		N/A
28	f/7.1	1/2 s	N/A	N/A	36 MeV	1 uA	20 mm	Beam not caught on image.		N/A
29	f/7.1	1/2 s	N/A	N/A	36 MeV	1.1 uA	20 mm	Beam on.		N/A
30	f/7.1	1/2 s	N/A	N/A	36 MeV	1.1 uA	20 mm	Some beam caught on image.		N/A
31	f/7.1	1/2 s	N/A	N/A	36 MeV	950 nA	20 mm	Beam on.		N/A
32	f/8	1/2 s	N/A	N/A	36 MeV	1.1 uA	20 mm	Beam on.		N/A
33	f/10	1/2 s	N/A	N/A	36 MeV	1.2 uA	20 mm	Beam on.		N/A
34	f/3.2	10 s	N/A	N/A	36 MeV	1.1 uA	2 mm	Radiation damage assessment.		N/A
35	f/3.2	10 s	Low	21 frames	36 MeV	1.1 uA	2 mm	Beam on.
36	N/A	N/A	Low	21 frames	36 MeV - 3 mm PMMA	1.1 uA	2 mm	Beam not caught on DSLR image, okay for sensor.	N/A
37	f/3.2	10 s	Low	21 frames	36 MeV - 3 mm PMMA	1 uA	2 mm	Beam on.

Friday 9th of March 2018

Pre-data Taking Information and Notes

• The tests were carried out with an energy of 36 MeV and 28 MeV. A Bragg Peak measurement was carried out to confirm the exact beam energy.
• Collimators used: 20 mm diameter.
• PMMA sheets used: 3 mm, 2 mm and 1 mm, taped over the mylar window.
• The average background value per pixel for the sensor is ~ 2500. The sensor pixel dimensions are 1030 x 1536. The sensor frame rate was always set to 25 frames per second.
• The DSLR ISO was always set to 200.
• 8 x 32 mm scintillator sheets were used. The scintillator stack was set up in the following order, starting with the first sheet facing the beam:
  • 7, 10, 13, 14, 15, 17, 18, 19
• Optical gel was not used for coupling, the sensor was placed directly on top of the scintillator stack.
• The dose received (as shown on the monitor in the control room) during the full day of measurements was:
  • For the 36 MeV beam
    • With a 20 mm collimator: 435.5 uC
    • With a 20 mm collimator + PMMA sheets: 17.3 uC
    • With a 20 mm collimator + films inserted between scintillator stack and sensor: 536.2 uC
  • For the 28 MeV beam
    • With a 20 mm collimator: 47.7 uC
• There current was variable/unstable throughout the day.
• To calculate the actual dose delivered to the scintillator:
  • / 160 -> to convert to proton current
  • / (50/ collimator diameter)^2 -> to account for reduction in area due to the collimator
• The directory containing the sensor data is:

/unix/pbt/data/birmingham/mar_2018/EPIX/XCAP/data/20180309_bham

• The directory containing the DSLR data is:

/unix/pbt/data/birmingham/mar_2018/Nikon/20180309_bham

Data Taking

44 || f/3.2 || 5 s || Low || 21 frames || 36 MeV || 10 nA || 20 mm || Beam on. Sensor realigned after this run to be straighter with respect to scintillator stack. ||

45 || f/3.2 || 10 s || N/A || N/A || 36 MeV || 5 - 10 nA || 20 mm || Beam on. ||

46 || f/3.2 || 5 s || Low || 21 frames || 36 MeV || 20 nA || 20 mm || Beam on. ||

47 || f/4 || 5 s || N/A || N/A || 36 MeV || 20 nA || 20 mm || Beam on. ||

48 || f/5 || 5 s || N/A || N/A || 36 MeV || 15 nA || 20 mm || Beam on. ||

49 || f/5 || 5 s || Low || 21 frames || 36 MeV || 50 nA || 20 mm || Beam on. Both camera and sensor saturated. ||

50 || f/8 || 5 s || N/A || N/A || 36 MeV || 50 nA || 20 mm || Beam on. Variable beam during acquisition.||

Run number	DSLR Aperture	DSLR Exposure	Sensor Full Well Mode	Sensor Sequence	Beam Energy	Current on Monitor	Collimator Diameter	Comments	DSLR Thumbnail	Sensor Thumbnail
38	f/3.2	2 s	N/A	N/A	N/A	N/A	N/A	Beam off, lid open. Focus check and background picture with white paper for DSLR.		N/A
39	f/3.2	2 s	Low	21 frames	N/A	N/A	N/A	Beam off, lid closed, lights off. Background run.
40	f/3.2	2 s	Low	21 frames	36 MeV	10 nA	20 mm	Beam on.
41	f/3.2	5 s	N/A	N/A	36 MeV	10 nA	20 mm	Beam on.		N/A
42	f/3.2	5 s	N/A	N/A	36 MeV	10 nA	20 mm	Beam on. Sensor realigned after this run to be straighter with respect to scintillator stack.		N/A
43	f/3.2	5 s	Low	21 frames	36 MeV	10 nA	20 mm	Beam on. Sensor realigned after this run to be straighter with respect to scintillator stack.
N/A
N/A
N/A
N/A