Proton Calorimetry/Meetings/2017/03/15

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:

• [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:

• Looking at emittance and beam profile evolution along Clatterbridge beamline.
• Using new input distributions.
• Beam evolution looks realistic: nice big hole at stopper!
• Final beam energy 60.22 MeV.
• SJ will send presentation to Andrzej Kacperek, Carsten Welsch, Hywel Owen and Colin Baker for review.

LK:

• Wrote documentation on photon fit for Roger Barlow.
• RS suggests looking at fit to histograms from calorimeter (reverse Landau).
• SJ suggests looking into 2 projects from Medical Physics:
  • Monte Carlo for Hounsfield Unit-Relative Stopping Power conversion (Paul Doolan);
  • Build-up effect and skin sparing in proton therapy (Adam Gibson).

RS on behalf of ABF:

• ABF looking at rate-dependent gain:
  • Average anode current too high due to gain (number of stages) and light output of scintillator.
  • LED behaviour replicates MedAustron testbeam data almost exactly.
• In discussions with Hamamatsu to build PMT with fewer dynode stages to produce lower gain and smaller peak current.
• New detector should be able to reach >10MHz rates...