Proton Calorimetry/Meetings/2018/11/14

Minutes for UCL Proton Calorimetry Meeting, 14th November 2018 (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Raffaella Radogna, Laurent Kelleter, Jeremy Ocampo, Saad Shaikh, Fernando Franco Felix, Ohie Mayenin, James Golbourn

Everybody introduced themselves to James; James introduced himself to everyone.

JG

• Reading through relevant chapters of Proton Therapy Physics by Paganetti.
• Lots of background reading on QA devices and processes: LK promises to forward on paper on PSI QA systems.
• To Do:
  • Read through QA paper from LK.
  • 4 days a week of MSc courses: Advanced QM, Molecular BioPhys, Physics of Stars; Climate and Energy, Advanced Stats, Molecular Physics. Also studying particle physics.

JO:

• Almost finished Geant4 tutorials:
  • Geant4 installed on laptop.
  • Installed MacPorts and ROOT on Mac.
• Had questions about how Geant4 calculates dose deposition.
• Still going through reading list provided by Jamie McClelland and Adam Gibson.
• To Do:
  • Build Geant4 simulations of Cherenkov emission in water and scintillation light output from scintillator block.
  • Contact Adam Gibson for existing Geant4 Cherenkov simulations.
  • Find optimal Satechi USB-C adapter.

MH:

• Pure Geant4 pCT simulation matches results from GATE.
• Reconstruction not quite working: resulting image does not represent actual object.
• Possibly to do with matching up pairs of protons from pre/post object: might be possible to assign individual proton ID.
• Issues with merging results from multiple simulations: cannot use more than 70,000 particles per simulation.
• To Do:
  • Contact Simon Rit to discuss reconstruction issues.
  • Contact Ben Morgan at Warwick to find solutions to simulation merging issues.

OM:

• Starting working on Geant4 simulations.
• Reading up on C++: SJ suggested getting started with the same tutorials as JO and MH.
• Plan of action is to work from Geant4 to BDSIM, then add in CAD modelling, before improving CAD model.

SS:

• Looking through data from Birmingham experimental runs.
• Results generally look good:
  • Clear double peak for eyepatch data.
  • Some spectra show unexpected double peaks: SJ suggests PMT rate effects.
• To Do:
  • Analyse scope data by Christmas.
  • Take data for LeCroy scope trigger rate test.

FFF:

• Will be working on front end detector electronics design and readout for project.
• Identified possible photodiodes for range calorimeter.
• Contacted Hamamatsu but specific photodiode not available: will discuss with Anastasia Basharina-Freshville and SJ to contact Hamamatsu rep directly.

LK:

• Working on build-up simulation paper.
• Preparing detector for HIT trip.