Proton Calorimetry/Meetings/2017/05/24

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Minutes for UCL Proton Calorimetry Meeting, 24th May 2017 (D17, Physics & Astronomy, UCL)


Simon Jolly, Laurent Kelleter, Anastasia Basharina-Freshville, Jordan Silverman


  • Full data acquisition now running completely over the network:
    • Single 50m cat6a cable runs into treatment room.
    • Network hub in treatment room connects to DAQ PC/laptop and scope.
    • DAQ PC connects to Caen digitiser, HV and detector emulator.
    • Connect to scope and DAQ PC via Windows Remote Desktop.
  • Looking at effect of splitting signals for remote testing:
    • Need to split signal from PMT to Caen digitiser and scope with 50 Ω splitter.
    • Spectra become less Gaussian and more difficult to fit when using splitter.
    • σpedestal and σwidth very similar...
    • Effects get worse with lower ADC counts.
    • Current 50 Ω splitter will not work for our purposes.
  • Need to find a solution in order to monitor signal in 2 places:
    • Make an active splitter?
    • Get a 50 Ω BNC splitter to reduce number of cables and connectors.
    • SJ suggest contacting Samer Al-Kilani and Izzat Darwazeh (UCL EE) for optimal cables and splitting.


  • Update on segmented calorimeter simulations:
    • Corrected Physics List to include nuclear interactions.
    • Simulations more accurate due to inclusion of nuclear build-up: fit now slightly worse as a result.
    • SJ agrees that these effects should be included in the model, but probably not at this stage.
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