Proton Calorimetry/Experimental Runs/2018/Mar23

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Beam tests of the UCL single module at medAustron.

Friday 23rd - Saturday 24th of March 2018

Pre-data Taking Information and Notes

  • The tests were carried out with an energy of 252.7 MeV with a 5 second beam spill and a range of intensities.
  • No collimators were used at any point.
  • The setup consisted of:
    • 2" Hamamatsu R13089-100-11 PMT with negative HV active divider base (made by Hamamatsu)
    • coupled with Eljen optical gel to a
    • 3 cm x 3 cm x 45 cm cuboid ENVINET standard scintillator wrapped in two layers 6 um (each) of Mylar
  • The "pensioner" 5 dynode stage PMT was also briefly tested, but no sensible data was able to be acquired.
  • 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

Data Taking

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
002 -800 133.2 Lowest 0.3 - 5 kHz As above
003 -700 116.35 Lowest 0.3 - 5 kHz As above
004 -600 99.45 Lowest 0.3 - 5 kHz Beam dropped during running!
005 -600 99.45 Lowest 0.3 - 5 kHz Repeat run with beam back.
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.
007 -600 Increased by 10 - 15 times of original 5 - 30 kHz Threshold: 20 LSB
008 -700 116.3 Increased by 10 - 15 times of original 5 - 30 kHz As above
009 -800 133.2 Increased by 10 - 15 times of original 5 - 30 kHz As above
010 -900 150.1 Increased by 10 - 15 times of original 5 - 30 kHz As above
011 -900 Increased by factor of 3 from 2nd intensity 150 - 200 kHz As above
012 -800 133.2 Increased by factor of 3 from 2nd intensity 150 - 200 kHz As above
013 -700 116.55 Increased by factor of 3 from 2nd intensity 150 - 200 kHz As above
014 -600 99.45 Increased by factor of 3 from 2nd intensity 150 - 200 kHz As above
015 -600 Increased by factor of 2 from 3rd intensity 300 - 340 kHz As above
016 -700 116.3 Increased by factor of 2 from 3rd intensity 300 - 340 kHz As above
017 -800 Increased by factor of 2 from 3rd intensity 300 - 340 kHz As above
018 -900 150.1 Increased by factor of 2 from 3rd intensity 300 - 340 kHz As above
019 -900 Increased by factor of 2 from 4th intensity 600 - 800 kHz As above. No sensible peak at this HV.
020 -800 133.2 Increased by factor of 2 from 4th intensity 600 - 800 kHz As above
021 -700 116.35 Increased by factor of 2 from 4th intensity 600 - 800 kHz As above
022 -600 99.35 Increased by factor of 2 from 4th intensity 600 - 800 kHz As above
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