Proton Calorimetry/Meetings/2016/11/30

Minutes for UCL Proton Calorimetry Meeting, 30th November 2016 (D17, Physics & Astronomy, UCL)

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

AC:

Looking through waveform files for bad waveforms.
No bad waveforms found searching by eye: ABF suggests using a higher rate dataset in order to increase the chances of finding bad waveforms.
Will look at filtering peaks using built-in ROOT functions and throw away waveforms with double pulses.
SJ will provide Matlab scripts for reading scope data: aim is to reconstruct energy spectra for scope data from 24th/25th November 2016 Clatterbridge run.

AK:

Converted August 2016 scope data from binary: data on /unix/pbt.
Not sure if timebase conversion is working correctly: will try and train conversion code on November 2016 Clatterbridge data.
Detector emulator producing waveforms with various time distributions: able to provide custom time distributions.

MH:

Running Clatterbridge simulations: using lateral surface mesh to count particles rather than looking at dose.
Will meet with Lawrence to try to shorten simulation time (14 hours...).
Intensity distribution at nozzle not quite flat: will look further upstream
Managed to obtain Roisin Stephens' log book: not quite sure what most of it means...
Will plot evolution of beam along beamline at each component.

ABF:

Working through data from November 2016 Clatterbridge run.
Still see amplitude reduction at high rates, with the added Brucie Bonus of an amplitude increase around 200kHz...

LK:

Removed PMT from Geant4 simulations and introduced photodiode element.
Photodiode counts photons! 21 photons per proton at Bragg peak.
Need to optimise simulation parameters: will try and reconstruct Bragg peak from photodiode output.
Will try some Geant4 visitation tutorials to resolve errors with OpenGL visualisation.