Proton Calorimetry/Meetings/2025/01/21

Minutes for UCL Proton Beam Therapy Group Meetings, 15th January

Joe Bateman, Sonia Escribano, Simon Jolly, Febian

Implementing BP and QB curve manually in python
- Bortfeld and paganetti have Bortfeld Bragg peak curve
From Simon:
- Possibly investigate whether Bragg curve can be implemented in fpga using superimposed gaussians since fpga fits gaussians very easily
- Matt cleaning up fpga whilst febian on placement so fabian can focus on fitting code

Havent solved calibration issue yet
Possibly get everyhting sorted in a month for experiment (optimistically)
Scintillator - need to receive samples
Only have 10 sheets within ourselves between 100x100x3mm but we need 128
Currently have 192 photodiodes but need 256
Matt has revd6 and revd5 possibly missing
10 ddc boards and 5 mod daughter boards form Oxford so turn around time about 14-20 days
Need to figure out how calibration code can work for having photodiodes on both sides - keep calibrations individual for now
Provide matt with ddc board with photodiodes and daughter board to tidy up firmware
Modifying ftdi code to detect boards attached - but if there are 0s that correspond to real number of boards to the measure they are erased (maybe explains calibration issue)
- Need to change ftdi2.cpp to eliminate 0s only in groups of 160

Can potentially do beam test with 2 modules
If need more may need to ask nuvia for more
Order about 100 more
Code should check read back pattern twice
- 1st to check number of boards
- 2nd to acquire data whilst knowing the number of boards

Reconstructing SOBPs from TOPAS simulation
Still working on fixing TOPAS and FRED discrepancy
Discrepancy disappears when simulating mono-energetic 150 MeV beam
Simulated 154.97 MeV proton beam with more realistic energy spread (from Saad's thesis) and agreement between TOPAS and FRED BP's improve