Proton Calorimetry/Meetings/2017/12/06

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Minutes for UCL Proton Calorimetry Meeting, 6th December 2017 (D17, Physics & Astronomy, UCL)


Simon Jolly, Laurent Kelleter, Anastasia Basharina-Freshville, Jordan Silverman, Dan Walker, Matthieu Hentz


  • Working on ROOT fitting for LeCroy binary data:
    • Two classes for loading (LeCroyData) and analysing (LeCroySpectrum) data.
    • Methods that get time/voltage arrays for individual triggers reset time to zero.
    • Current integration in LeCroySpectrum chooses region based on voltage levels: SJ and LK suggested more robust to use time window. ABF said Caen integration window 100–200 ns.
  • Will contact Tony Price at Birmingham regarding taking some data with trackers!



  • Investigating difference between MC truth and energy resolution returned by fit:
    • Adjusting energy resolution of scintillator (nominally 8.5%): gives Monte Carlo truth resolution of 1.36% at 60MeV.
    • Fit resolution doesn't change with increasing energy resolution.
    • Spectra look very similar for different scintillator resolutions: overlap within error?
    • Will run simulations with very small resolutions and dig further into fit.
  • Will chase up Hamamatsu regarding flat panels.


  • Run Clatterbridge simulations with angled stopper:
    • Largest angular offset of 15 degrees means 0.75mm difference in depth.
    • Angle offset causes spectrum to flatten.


  • Has written a talk for PPRIG...
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