Proton Calorimetry/Meetings/2017/01/25

Minutes for UCL Proton Calorimetry Meeting, 25th January 2017 (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Anastasia Basharina-Freshville, Andreas Christou, Adam Knoetze, Matthieu Hentz

AC:

• Working on analysis of scope waveform data.
  • ROOT will now identify bad pulses!
  • ROOT TSpectrum will analyse waveforms for double peaks based on histogram distribution.
• Will next try and fit to good waveforms to train pulse filtering and integration.
• Anastasia suggests looking at low and high rate files with no absorber.
• Will also complete Java code to import binary files directly into ROOT: need to include input arguments.

AK:

• Looking at various output spectra from Caen detector emulator.
• Trying to set spectrum of waveform magnitudes (Caen instructions plus trial and error...).
• Taking average of "large" waveforms to produce mean waveform for emulator.
• Detector emulator time resolution much coarser than scope data (~160MHz): need to extract subset of individual waveform data to produce approximation of our waveforms.
• Next step is to put output of detector emulator into digitiser and try and recreate Clatterbridge results.
• Will also replicate Anastasia's experiments with LED light pulser injected into scintillator+PMT.

MH:

• Specification of components for Clatterbridge beamline.
• Need to check position and construction of dose monitors.
• SJ will send current document to Clatterbridge and Carsten Welsch (Liverpool) for checking.

ABF:

• Looking into frequency-dependent gain from scope data for last Clatterbridge run.
• Using LED light pulser to inject light into scintillator+PMT to corroborate gain changes:
  • Results seem to confirm gain variation seen with experimental results.
  • Drop in gain somewhere around 20kHz.
• Finished analysing Caen ADC and waveform data from November 2016 runs:
  • http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2016/clatterbridge_nov2016_analysis.pdf
  • http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2016/clatterbridge_nov2016_waveform_analysis.pdf