Proton Calorimetry/Meetings/2024/10/09

Minutes for UCL Proton Beam Therapy Group Meetings, 9th October

Present

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

Raffaella Radogna

• Arrives on Sun 27th - will be around on UCL from Monday with fibre setup
• New equipment for second setup will be arriving in Bari soon
• Will need 20-25cm prior to QuARC
• Hole on optical board for cables to pass through
• Use trolly with optical board

Sonia Escribano

• Mismatch between root and macOS when looking at fitting code
• In code, issue with position - definition of centre of sheets - works well for one module - but when using two modules becomes issue - assumes separation is 1.5 mm instead of 3 mm
  • Accounting for this reduces the 1.5 mm offset
  • Constant observed offset is removed if start counting at 3mm rather than 0 mm
  • Will check with other sets of data
• Currently debugging the code
  • Sheet positions pulled from file with sheet thicknesses on it - may need to update and simplify for future production - maybe put into .json file?
• Future experiment - updated QuARC (with new scintillators and improved electronics) UCLH before Xmas to do list:
  • No news from Martin
  • Harry visiting Datron but no news yet - ask Harry
  • Need to test electronics
  • Lab testing with DAQ laptops and GUI should be done
    • Even if scintillators aren't ready should do with photodiodes and code
    • Sonia to take charge of this
  • In terms of DAQ and GUI
    • Gui needs testing with new fpga and electronics - need whole. Module to test
    • Live visualisation: Live data and then at end of live data see the fit -- Live data readout - one fit to all data - then trigger post processing -- Live data readout - one fit to all data - then trigger post processing
    • Postprocessing - currently two codes calibration & fit oof avg measurement

Simon Jolly

• For fitting - have single calibration file per module as opposed to two (one per shoot through for each direction) ?
• How to include errors in the fitting - I.e. put large errors on sheets with less accurate value to influence fit less

• Goal of new QuARC test to tests new electronics Daisy chain with usb-c and double sided photodiodes
  • 4 modules with 8 boards to do immediate measurements i.e. daisy-chaining 8 modules
  • But only need online readout of 4
  • To test scanning beam position and how this can reconstruct the Bragg peak and compare to simulated beam
  • New good sheets from harry, in newly designed scintillator sheet holders mounted into a newly cut peli-case
  • Testing new ddc boards and usb 104 chain
  • As well as checking light output with existing fpga code on new ddc boards to ensure fpga code on new boards
  • Sending for new ddc and new mod boards to be produced
  • Maybe still have beam test with new scintillator and old ddc boards etc
• Can maybe acquire with fibres ? Since fibre DAQ is independent currently ?