Proton Calorimetry/Meetings/2017/05/24

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

Present

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

ABF:

• 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.
  • σ_pedestal and σ_width 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.

LK:

• 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.