Proton Calorimetry/Meetings/2022/05/11

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Minutes for UCL Proton Calorimetry Meetings, 11th May


Saad Shaikh, Simon Jolly, Raffaella Radogna

Saad Shaikh

  • Completed LED lab tests with unpainted sheets and white paper, black card and mylar foil. Results presented in this presentation.
    • Mylar foil provides best combination of large signal and minimum cross-talk.
    • Still observe around 5% crosstalk, due to light leaking around edges of sheet.
    • Optical gel increases signal level by 20-30% without increasing cross-talk.
    • White painted sheets 10-20 times dimmer than unpainted sheets – optical gel may not be necessary at all.
    • Should perform test again with black stack holder before and after spray-painting black.
  • Nexys Video board died during LED tests with Rev. C boards. Unclear cause of issue and Rev. C boards now give incorrect configuration pattern when using new Nexys Video board.
    • Asked Matt Warren to look at Nexys Video board and will investigate Rev. C issues further.
  • Spoke with Ruben about measuring Birks constant. Tests possible with proton beam at UCLH and with alpha particles and electrons at UCL.
    • Need to discuss further – but work could make for a good MSci project.
  • Will prepare talks/posters for CALOR and Elba conference.
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