Proton Calorimetry/Meetings/2024/07/31

Minutes for UCL Proton Beam Therapy Group Meetings, 31st July

Present

Joe Bateman, Sonia Escribano, Febian, Simon Jolly

Sonia Escribano

• Run059 and Run060 box fields
  • DICOM files from Alison - confirms 10 different beams and that all data was acquired
  • Calibrating measurements layer by layer.
  • Fitting on calibrated beams works for first 5 beams - but after this the faulty photodiode affects the BP fit.
    • Check where this faulty diode over measurement is coming from i.e. whether it's from a calibration error to attempt to find universal correction for this PD
    • Potentially constrain fit by applying larger errors to faulty points i.e. by comparing relative distance from adjacent points, or make a larger error if arising from raw measurements as opposed to from calibration etc.
  • Comparing energies of well-fitted points compared to DICOM energies and a linear relation with offset.
  • When including adjusted fit energies, to those from DICOM - linear fit although lower energies have a larger deviation from linearity
  • Deviation seen between the integral areas for run059 and run060 on some beams.
  • Plot of integral between integral for each beam number for run059 and run060 shows relatively good agreement except for some beams
    • Could plot against MU from DICOM files
  • Plot of range between run060 and run059 for each beam also shows good agreement.

• Replay GUI
  • Problem with max x value - find maximum value and add 4 sheets
    • as long all previous 4 sheets have a lower value than the maximum value (to account for faulty photodiodes).

• • Figuring out how to stop GUI replay
    • Sonia and Simon will discuss GUI shell script after meeting

Febian

• Working on FPGA clock
• Created git repository for code on FPGA implementation
• Develop one git repository for tutorial codes and another one for implementation on FPGA codes for different components

Joe Bateman

• Working on Geant4 simulation examples with visualisation - try using pc188 with OpenGL
• Also working on attempting to get the PBT wiki proton beam Geant4 examples running on Geant4 11.2 over CVMFS
  • Should aim to ensure that eventually all updated scripts can run on most up-to-date G4 version without it breaking all the code.