Proton Calorimetry/Meetings/2017/01/11

Minutes for UCL Proton Calorimetry Meeting, 11th January 2017 (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Laurent Kelleter, Adam Knoetze, Matthieu Hentz

MH:

• Clatterbridge simulations: now running 1 million events:
  • Split simulations and submitted to batch farm: reduced simulation time from 24 hrs to 30 mins.
  • Will look into longer simulations using different batch farm queues.
• Updated beamline construction with second dose monitor.
  • Will put together diagram with coordinates, dimensions and materials to send to Clatterbridge to check dimensions.
  • Will also collate results to send to Carsten Welsch at Liverpool for review.

AK:

• Finally dividing scope waveform files successfully: each waveform is 2,502 lines ie. 1000.4ns.
• Converted data files from August and November: all correctly split up.
• Python conversion script runs much more quickly (<10mins).
• Using this data as detector emulator input:
  • Poisson distributed signal rate.
  • Constant, actual rate.
• Will take waveforms from 20kHz dataset:
  • Normalise magnitudes and overlay waveforms to check variation with amplitude;
  • Use only waveforms with amplitude above 70% of max to compare large amplitude waveforms;
  • Calculate "ideal" waveform for input to digitiser.

LK:

• Simulation took too long when simulating full internal reflections:
  • Always constant fraction that arrive at photodiode.
  • Will check photodiode position with single layer.
• Also looking at energy deposition as a function of depth in fine detail:
  • Steps appearing in the middle of each layer...
  • Still investigating origin of error...