Proton Calorimetry/Meetings/2018/01/10

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Minutes for UCL Proton Calorimetry Meeting, 10th January 2018 (D17, Physics & Astronomy, UCL)


Simon Jolly, Ruben Saakyan, Laurent Kelleter, Anastasia Basharina-Freshville, Jordan Silverman, Dan Walker


  • Update on single module detector simulations and scintillator paint tests:
    • Larger FWHM smearing now shows increase in spread in detected resolution.
    • Still a difference between MC Truth and reconstructed resolutions.
    • MC Truth calculated purely from detector resolution: reconstructed resolution also includes beam energy spread.
    • When subtracting in quadrature, offset is almost constant: intrinsic energy resolution in the beam?
    • Will check energy spread on Matthieu's beam and also rerun simulations with mono-energetic pencil beam.
    • Paint tests with scintillator show large decrease in light output.
    • Increase in signal/noise results from lower photon statistics.
  • Paper should be ready in draft form by end of January.


  • Set up Nikon D70 camera from Adam Gibson to take images remotely.
  • Will check with Michaela Esposito whether we can use PRaVDA ISDI sensor.
  • Spoken to ISDI about commercial sensors: waiting for datasheet.


  • Working through CAD modelling in Geant4:
    • Should be able to import GDML files into Geant4.
    • Autodesk does not support GDML...
    • Need bridging software to do conversion: FreeCAD GDML and FastCAD, both of which have drawbacks...
  • Running into problems with OpenGL visualisation for Clatterbridge simulations.


  • Bug-hunting in binary conversion code: some integrals coming out negative...
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