Proton Calorimetry/Meetings/2024/12/18

Minutes for UCL Proton Beam Therapy Group Meetings, 18th December

Joe Bateman, Sonia Escribano (via teams), Febian, Simon Jolly, Raffaella Radogna (via teams), Andreas Korn (via teams)

Possibility of test beam at Trento
For beam time submission: need amount of time and dose and fields needed at FLASH dose rates

Need to test new ddc boards in jan first before we know when we'll be ready for a beam test - feb/end of march - will be with new electronics
Page setup on wiki to decide required beam parameters Proton Calorimetry/Experimental Runs/2025/Trento 2025-03

If set number of boards to >4 when only that number of boards is available retrieves random data
Investigate with setting max number to 10 (since won't be using more than 8 boards anyway).

TOPAS and FRED simulation of UCLH Beam test run033 SOBP pencil beam 1 (~150 MeV) shows significant differences between Bragg peak shape (ran both codes using default physics lists and settings)
- R_80 of PDD very similar but FRED have sharper Bragg peak with smaller range straggling
- When looking at absolute dose-depth curves - almost identical in the plateau/buildup region but difference in Bragg peak width and height - likely to do with handling on nuclear interactions and energy straggling models
- Will investigate different physics settings and maybe get in touch with Ilaria and Giorgio from Maestro for advice.
Fully reconstructed all pencil beams (with 1e6 primaries per pb) for run033 in FRED in 3 configurations:
- Size, position and intensity from CMOS; energy from QuARC
- Size and position from CMOS; energy from QuARC; intensities from DICOM
- All parameters from DICOM
- Clear saturation and inaccuracies from CMOS intensities but reconstruction using DICOM intensities shows promising SOBP