Proton Calorimetry/Experimental Runs/2018/Mar8-9: Difference between revisions
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Revision as of 12:52, 12 March 2018
Beam tests of the UCL plastic scintillator range calorimeter.
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.
- 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
- 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. |
|
|
