Proton Calorimetry/Meetings/2017/03/15: Difference between revisions

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=== Present ===
=== Present ===


'''Simon Jolly''', '''Ruben Saakyan''', '''Anastasia Basharina-Freshville''', '''Laurent Kelleter''', '''Adam Knoetze''', '''Matthieu Hentz''', '''Andreas Christou''', '''Jordan Silverman'''
'''Simon Jolly''', '''Ruben Saakyan''', '''Laurent Kelleter''', '''Adam Knoetze''', '''Matthieu Hentz''', '''Andreas Christou'''
 
'''Student talks on Friday 17th March: 14.00–15.00'''


'''AC''':
'''AC''':


* Working on waveform fitting in ROOT:
* Working on waveform integration in ROOT:
** Gaussian part of the fit works.
** ROOT can integrate pulses.
** Trying to fit falling edge of pulse using single exponential.
** Possible to set short and long gate equivalent.
** Will try implementing double exponential.
** Preliminary results for integration seem to match Anastasia's results.
* Can already filter out pulses with more than one peak:
* FINALLY have info from LeCroy to read out multiple waveforms from a single binary file:
** Will reconstruct ADC spectrum from filtered waveforms.
** Waveforms are called ''segments''.
** Will vary integration window for pulse (50, 100, 150ns used in experiment).
** Sets of waveforms are called '''sequences'''.
** Single variable in binary header defines number of segments.
 
'''AK''':
* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/AKnoetze_15.03.2017.pdf Looking at Hamamatsu PMT response to LED:
** Measurements over wide range of frequencies with fixed current.
** Also took data with emulator.
** Odd results from UCL base: probably broken by '''RS''' in transit from MedAustron...


'''MH''':
'''MH''':
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* Need to check initial parameters and beam density distributions: will plot intensity distributions to make it clearer.
* Need to check initial parameters and beam density distributions: will plot intensity distributions to make it clearer.
* Updated geometry based on information from Andrzej.
* Updated geometry based on information from Andrzej.
'''AK''':
* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/AKnoetze_Hamamatsu_SelfTrig_2.14V_08.03.2017.pdf Looking at Hamamatsu PMT response to LED].
* '''RS''' and '''ABF''' will walk through results to suggest improvements.


'''ABF''':
'''ABF''':

Revision as of 14:19, 15 March 2017

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

Present

Simon Jolly, Ruben Saakyan, Laurent Kelleter, Adam Knoetze, Matthieu Hentz, Andreas Christou

Student talks on Friday 17th March: 14.00–15.00

AC:

  • Working on waveform integration in ROOT:
    • ROOT can integrate pulses.
    • Possible to set short and long gate equivalent.
    • Preliminary results for integration seem to match Anastasia's results.
  • FINALLY have info from LeCroy to read out multiple waveforms from a single binary file:
    • Waveforms are called segments.
    • Sets of waveforms are called sequences.
    • Single variable in binary header defines number of segments.

AK:

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.

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.

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