Proton Calorimetry/Meetings/2022/05/11: Difference between revisions
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**White painted sheets 10-20 times dimmer than unpainted sheets – optical gel may not be necessary at all. | **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. | **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. | *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. | **Need to discuss further – but work could make for a good MSci project. | ||
*Will prepare talks/posters for CALOR and Elba conference. | *Will prepare talks/posters for CALOR and Elba conference. | ||
Revision as of 16:03, 11 May 2022
Minutes for UCL Proton Calorimetry Meetings, 11th May
Present
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.