Proton Calorimetry/Meetings/2017/02/08

Minutes for UCL Proton Calorimetry Meeting, 25th January 2017 (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Ruben Saakyan, Anastasia Basharina-Freshville, Laurent Kelleter, Adam Knoetze, Matthieu Hentz

AK:

• Working with pulser and LED.
• Running detector emulator into digitiser produces exact replication of spectra as expected.
• Driving LED with detector emulator more problematic: digitiser won't trigger properly on PMT output.
• Driving LED with regular pulses gives similar response to experimental measurements:
  • For Hamamatsu base, mean ADC position (gain) drops with frequency then stabilises around 100kHz;
  • For UCL base, ADC mean drops quickly then rises from ~30kHz up to ~450kHz.
• Will try more measurements at lower and higher frequencies.

MH:

• PDFs of layout sent to Clatterbridge and Carsten Welsch: no response as yet...
• Measuring the emittance evolution down the Clatterbridge beamline:
  • Original element written by ESA: doesn't work...
  • Will write own custom element for specifying input emittance.

LK:

• Looking at getting the proton range (mean proton energy) from a scintillation photon depth distribution.
• Deriving analytic function to describe quenched Bragg Peak very complex...and may not be accurate...