Proton Calorimetry/Meetings/2017/03/15

Minutes for UCL Proton Calorimetry Meeting, 15th March 2017 (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Ruben Saakyan, Anastasia Basharina-Freshville, Laurent Kelleter, Adam Knoetze, Matthieu Hentz, Andreas Christou, Jordan Silverman

AC:

• Working on waveform fitting in ROOT:
  • Gaussian part of the fit works.
  • Trying to fit falling edge of pulse using single exponential.
  • Will try implementing double exponential.
• Can already filter out pulses with more than one peak:
  • Will reconstruct ADC spectrum from filtered waveforms.
  • Will vary integration window for pulse (50, 100, 150ns used in experiment).

MH:

• Looking at emittance and beam profile evolution along Clatterbridge beamline.
• Ignoring protons that fall outside the measurement region in simulations.
• Need to check initial parameters and beam density distributions: will plot intensity distributions to make it clearer.
• Updated geometry based on information from Andrzej.

AK:

• Looking at Hamamatsu PMT response to LED.
• RS and ABF will walk through results to suggest improvements.

ABF:

• Started looking at data from MedAustron experimental runs.
• 0.7% FWHM energy resolution at 252MeV!
• Will continue analysing results: can distribute to collaborators once complete.

LK:

• Still looking at photon depth curve in simulations.
• Improved y errors: includes fluctuation in energy deposition.
• Fit looks good but not perfect around Bragg peak.
• Errors on fitted energy underestimated but final range close to reality.
• SJ suggests contacting Roger Barlow (Huddersfield) to discuss fit accuracy.