Proton Calorimetry/Meetings/2017/10/04

Minutes for UCL Proton Calorimetry Meeting, 20th September 2017 (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Rube Saakyan, Laurent Kelleter, Anastasia Basharina-Freshville, Jordan Silverman, Matthieu Hentz, Dan Walker

JS:

• Working on different visualisers for tutorials.
• Tried using Google visualisation package (the name of which escapes us...).
• Waiting on information from Tony Price on Geant4 visualisation: SJ will chase up...

ABF:

• Detector simulations now include hexagonal module and Clatterbridge nozzle collimator.
• Trying to pin down origin of non-Gaussian shape of ADC peak from Clatterbridge data:
  • Background measurements do show low energy peak but nothing at high energies.
  • Low energy peak slightly reduced due to absorption in 4cm PMMA.
  • Using Matthieu's latest simulations with 2mm collimator does show a non-Gaussian shape on main peak but not large enough.
• RS suggests putting an angle on the collimator in MH's simulations to check the effect.
• Also modifying mylar thickness to

RS

• Still working with Hamamatsu to provide PMT for single module:
  • Supply last dynode stages in PMT from 2 HV PSUs.
  • Concern over no limiting resistor between HV and dynode...

MH

• Welcome back!
• Courses start next week: will add in some Medical Physics courses.
• Will look into rerunning Clatterbridge simulations to provide input for Anastasia:
• Split beamline into 3 sections:
  • Up to 1st collimator (doughnut).
  • Between doughnut and stopper.
  • After stopper.

LK:

• Transfer talk almost finished: ready for inspection...

JS:

• Updated and corrected all Geant4 tutorials.
• SJ to create a page for Eclipse tutorials.
• Will take over from Matthieu running Clatterbridge simulations...