Proton Calorimetry/Meetings/2023/03/15

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Minutes for UCL Proton Calorimetry Meetings, 15th March


Saad Shaikh, Simon Jolly, Sonia Escribano, Maya Maciurzynska

Saad Shaikh

  • Delivered update on Geant4 simulation development, slides can be found here.
    • Found a list of values for Gaussian energy straggling to produce curves similar to those measured at UCLH, across clinical energy range.
    • Added detector messenger to allow Birks' constant to be set at runtime.
  • Gave presentation on analysis on PARTREC beam test, slides can be found here.
    • Beam quality worsens at lower energies, possibly due to aluminium beam degrader.
    • Appear to have linear scaling of average charge measured with beam current.
    • Fit results do vary with different beam current: effect is more pronounced at lower (worse) energies, best results still have 0.1-0.2 mm difference in range.
    • There is some interplay with Birks' constant and range – worse values of Birks' constant give worse range results.
    • Possibly have 0.8mm systematic offset from reference data, but need more reference data to confirm.
  • Programmed flash memory on USB104 board so that device is programmed with DDC232 code on power-up.
    • Updated Raspberry Pi and loaded latest versions of DAQ code: set up works with Sonia's GUI.
  • Will start PBT journal club with Sonia to start consolidating research from other groups on scintillators for proton therapy & ionisation quenching.
  • Organised first meeting of UCL HEP Climate Change projects and drafted a call for proposals for 4 small funded projects for PhD students.