Proton Calorimetry/Meetings/2024/07/17

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Minutes for UCL Proton Beam Therapy Group Meetings, 17th July

Present

Joe Bateman, Sonia Escribano, Simon Jolly, Andreas Korn (on Zoom)

Andreas Korn

  • Andreas knows Daniel from ATLAS also involved with development of scintillating materials in German polytechnic - wants to help with designing better scintillating sheets - water equivalent density and 3mm.
  • Improved technique for optically decoupling insulator - dipping/coating technique as opposed to mylar wrapping - potentially a thinner film coating than the 6um mylar sheets.
  • If Daniel can provide 105 by 105 mm sheets or 100 by 100 mm with 3 mm tickets we can test soonish if we can get UCLH beam time.

Sonia Escribano

  • Analysis from most recent UCLH beam test
    • Correlating QuARC energies to DICOM energies give constant 4-5 mm offset.
    • Additional ~ 2.5 mm when taking into account WET of NPL transmission calorimeter and UoB CMOS detector.
    • Looking to implement consistent fitting parameters i.e start fitting 5 sheets prior and ending 3 sheets after rather manually changing for each run.
    • Some photodiodes behave weirdly for different runs but not consistently for every run
    • Re-investigate calibration issue and strange results when applying to Christie measurements despite same sheets used.

Simon Jolly

  • Some of the QuARC USB-Cs are flaky
  • Order of connecting electronics in daisy chain matters
  • No set of pristine scintillators as of yet
  • Refined electronics and pristine new set of scintillator sheets will be needed before next beam test

Joe Bateman

  • Try and run basic Geant4 examples via CVMFS
  • Email Ben Morgan from Warwick uniform advice on Geant4 via CVMFS etc