Proton Calorimetry/Meetings/2017/11/22: Difference between revisions

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== Minutes for UCL Proton Calorimetry Meeting, 15th November 2017 (D17, Physics & Astronomy, UCL) ==
== Minutes for UCL Proton Calorimetry Meeting, 22nd November 2017 (D17, Physics & Astronomy, UCL) ==


=== Present ===
=== Present ===


'''Simon Jolly''', '''Ruben Saakyan''', '''Anastasia Basharina-Freshville''', '''Jordan Silverman''', '''Dan Walker'''
'''Simon Jolly''', '''Laurent Kelleter''', '''Anastasia Basharina-Freshville''', '''Jordan Silverman''', '''Dan Walker''', '''Matthieu Hentz'''
 
'''RS''':
* WaveCatcher has arrived!
** '''ABF''' will have first look then pass on to '''DW'''.
* Hamamatsu flat panel sensor needs to be ordered:
** '''ABF''' will chase up.


'''ABF''':
'''ABF''':
* Comparing '''Matthieu's''' simulated spectrum to results for Clatterbridge single module:
* Spoke to '''Ruben Saakyan''' about Nuvia sheets:
** Spectrum looks closer than before to measured spectrum.
** '''Ruben''' visiting Prague in the next few weeks.
** Landau fit working for peak but long tail not well described.
** Waiting for Nuvia to determine whether they can do 2 mm sheets.
** '''RS''' suggests '''Network Performance Analysis!'''
* Spoke to Hamamatsu about flat panel detectors:
** Will work with Laurent on improving fitting of data.
** Contact person might be called Simon...
* Testing Hamamatsu boosted PMT base:
** Preferred detector 50x50 mm version: will check the differences.
** Erratic behaviour disappears when boosting 6th dynode but peak still drops with increasing frequency.
* Working on fitting to single module spectrum:
** Issues with fitting in ROOT: version dependent...
** Now fitting to tail as well as peak, but transition still needs work.
** Will add in exponential term to 'join' two parts of fit.


'''JS''':
'''JS''':
* Looking into CAD modelling in Geant4:
* Spoke to '''Glen Cowan''' at RHUL on ROOT curve fitting:
** Issues with each option for CAD import!
** Suggested to add in another convolution;
** Will email '''SJ''' with details of CAD import issues.
** If that doesn't work, try doing piecewise fit.  
* Haven't pursued PRaVDA VM.
* Will prototype in Python before moving over to ROOT.
* Will look at ROOT fitting with details from '''ABF'''.
* Will start to run Clatterbridge simulations from '''Matthieu'''.


'''DW''':
'''DW''':
* Working to fit waveform files in ROOT.
* Very close to finishing off producing spectra from Lecroy binary files.
* Have simplified filtering: will add in baseline subtraction for each waveform.
* Will then move on to curve fitting...
* '''ABF''' suggests using alternative method than pulse fitting to distinguish double pulses: will be much faster!
'''MH''':
* Running Clatterbridge simulations with changes in nozzle cap angle:
** Very little difference in spectra.
** OMA Monte Carlo school indicated overlap in geometry boundaries may be a problem...
* Changed how particles recorded from stepping action to sensitive detector.
* Given up on installing Geant4 on MacBook Pro: will switch over to piss poor Lenovo CDT laptop:
** '''SJ''' will ask '''Tim Scanlon''' about swapping for a machine with more horsepower.
 
'''LK''':
* Discussing build-up paper with '''Adam Gibson''':
** Simplified definition of build-up to be based on Bragg curve.
** Understanding more about the physics!
** Reran simulations at higher energies: absorber too small.
** Will contact various OMA colleagues to understand origin of high entrance dose for protons above 200 MeV.

Latest revision as of 15:15, 22 November 2017

Minutes for UCL Proton Calorimetry Meeting, 22nd November 2017 (D17, Physics & Astronomy, UCL)

Present

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

ABF:

  • Spoke to Ruben Saakyan about Nuvia sheets:
    • Ruben visiting Prague in the next few weeks.
    • Waiting for Nuvia to determine whether they can do 2 mm sheets.
  • Spoke to Hamamatsu about flat panel detectors:
    • Contact person might be called Simon...
    • Preferred detector 50x50 mm version: will check the differences.
  • Working on fitting to single module spectrum:
    • Issues with fitting in ROOT: version dependent...
    • Now fitting to tail as well as peak, but transition still needs work.
    • Will add in exponential term to 'join' two parts of fit.

JS:

  • Spoke to Glen Cowan at RHUL on ROOT curve fitting:
    • Suggested to add in another convolution;
    • If that doesn't work, try doing piecewise fit.
  • Will prototype in Python before moving over to ROOT.

DW:

  • Very close to finishing off producing spectra from Lecroy binary files.
  • Will then move on to curve fitting...

MH:

  • Running Clatterbridge simulations with changes in nozzle cap angle:
    • Very little difference in spectra.
    • OMA Monte Carlo school indicated overlap in geometry boundaries may be a problem...
  • Changed how particles recorded from stepping action to sensitive detector.
  • Given up on installing Geant4 on MacBook Pro: will switch over to piss poor Lenovo CDT laptop:
    • SJ will ask Tim Scanlon about swapping for a machine with more horsepower.

LK:

  • Discussing build-up paper with Adam Gibson:
    • Simplified definition of build-up to be based on Bragg curve.
    • Understanding more about the physics!
    • Reran simulations at higher energies: absorber too small.
    • Will contact various OMA colleagues to understand origin of high entrance dose for protons above 200 MeV.
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