Proton Calorimetry/Meetings/2017/12/13: Difference between revisions

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** Fixed by putting a brass ring around the nozzle on the outside of the box.
** Fixed by putting a brass ring around the nozzle on the outside of the box.
* Completing coursework and reading up on proton CT.
* Completing coursework and reading up on proton CT.
'''ABF''':
* Fixed smearing of energy resolution in simulations:
** Was smearing pre and post simulations: post-simulation always used 8.5%; now only smearing pre-simulation with variable resolution.
** Now correlation between Monte Carlo truth and reconstructed energy spectrum.
** Still seeing low energy tail.
'''LK''':
* PPRIG was good!
** Mike Merchant wants particle spectra for Geant4-DNA simulations.
** Very helpful comments during evening meal...
** Not sure whether initial proton retains 'primary proton' ID.
* Everything should be finished with paper:
** Waiting for Adam to write his parts and polish off.
** Clinical part needed from Richard Amos.
** No answer from Tracey Underwood: becoming less likely...
* Lots of code housekeeping!
* Will contact '''Michaela Esposito''' and '''Tony Price''' about ISDI sensors.


'''DW''':
'''DW''':
Line 21: Line 41:


'''JS''':
'''JS''':
* Investigating alternative methods for [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/JS_Different_Curve_fitting_method_6-12-17.pptx fitting to Matthieu's simulated energy spectrum for Clatterbridge data].


'''ABF''':
* Gone back to looking into CAD modelling in Geant4.
* Investigating [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/ABF_groupMeeting_06.12.17_fitStudies.pdf difference between MC truth and energy resolution returned by fit]:
* Going through Matthieu's Clatterbridge simulations:
** Adjusting energy resolution of scintillator (nominally 8.5%): gives Monte Carlo truth resolution of 1.36% at 60MeV.
** Learning how simulations run.
** Fit resolution doesn't change with increasing energy resolution.
** Investigating introducing sensitive detectors for particle measurements.
** Spectra look very similar for different scintillator resolutions: overlap within error?
** Will run simulations with very small resolutions and dig further into fit.
* Will chase up Hamamatsu regarding flat panels.
 
'''MH''':
* Run Clatterbridge simulations with angled stopper:
** Largest angular offset of 15 degrees means 0.75mm difference in depth.
** Angle offset causes spectrum to flatten.
 
'''LK''':
* Has written a talk for PPRIG...

Revision as of 14:47, 13 December 2017

Minutes for UCL Proton Calorimetry Meeting, 6th December 2017 (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Laurent Kelleter, Anastasia Basharina-Freshville, Jordan Silverman, Dan Walker

Matthieu Hentz:

  • Refining Clatterbridge simulations:
    • Noticed that particles were getting through a gap between the dosimetry box and the nozzle: due to Geant having difficulties with coinciding boundaries.
    • Fixed by putting a brass ring around the nozzle on the outside of the box.
  • Completing coursework and reading up on proton CT.

ABF:

  • Fixed smearing of energy resolution in simulations:
    • Was smearing pre and post simulations: post-simulation always used 8.5%; now only smearing pre-simulation with variable resolution.
    • Now correlation between Monte Carlo truth and reconstructed energy spectrum.
    • Still seeing low energy tail.

LK:

  • PPRIG was good!
    • Mike Merchant wants particle spectra for Geant4-DNA simulations.
    • Very helpful comments during evening meal...
    • Not sure whether initial proton retains 'primary proton' ID.
  • Everything should be finished with paper:
    • Waiting for Adam to write his parts and polish off.
    • Clinical part needed from Richard Amos.
    • No answer from Tracey Underwood: becoming less likely...
  • Lots of code housekeeping!
  • Will contact Michaela Esposito and Tony Price about ISDI sensors.

DW:

  • Working on ROOT fitting for LeCroy binary data:
    • Two classes for loading (LeCroyData) and analysing (LeCroySpectrum) data.
    • Methods that get time/voltage arrays for individual triggers reset time to zero.
    • Current integration in LeCroySpectrum chooses region based on voltage levels: SJ and LK suggested more robust to use time window. ABF said Caen integration window 100–200 ns.
  • Will contact Tony Price at Birmingham regarding taking some data with trackers!

JS:

  • Gone back to looking into CAD modelling in Geant4.
  • Going through Matthieu's Clatterbridge simulations:
    • Learning how simulations run.
    • Investigating introducing sensitive detectors for particle measurements.
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