Proton Calorimetry/Meetings/2020/02/17

Minutes for UCL Proton Calorimetry Meetings, 17th February (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Laurent Kelleter, Saad Shaikh, Raffaella radogna

Saad Shaikh

• he is able to fit real data using Laurent's code
  • all of the steps are included, quenched bragg fit and reconstructed curve. comparison with simulated distrivution is also included.
• the range is always slightly underestimated
  • fitting simulated data, a small underestimation comes from the model
  • fitting real data, the underestimation is consistent with uncertainties
• he tried data for measuring range withour PMMA absorbers and data with absorbers to double check the WE thickness of the absorber
• the analysis includes Bkg subtraction and calibration
• comparison of run 47 30mm vs 52 21 mm and dependence with beam size
  • the smaller beam has higher light output, but the difference in light output compensates at the Bragg peak.
  • will plot spot size intermediate steps to check the consistency of the measurements.
• started implementing more object oriented way of implementing data.
• he is interested in running geant4 simulations in the near future

Raffaella Radogna

• busy with grant application
• performed hardware test to optimise the design of the electronic board with Bernard.
  • the best option is having 2.86 mm pitch for best coupling PDs array and scintillator sheets
• will double check with knoledge exchange the information provided by Laura

Laurent Kelleter

• cross talk measurements performed last week
  • LED with optical fibers to inject light
  • he will perform the analysis to quantify it.
• final version of the quenched bragg paper for submission
• will start sending his thesis to Simon for corrections