Proton Calorimetry/Meetings/2018/01/24: Difference between revisions

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


'''DW''':
'''LK''':
* Integration of Leroy binary signals were giving negative results:
* Investigating [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2018/LK20180124_AnalyseImageData.pdf image acquisition for Nikon camera]:
** Probably a result of including rising edge of pulse when calculating baseline.
** Using '''SJ''' liquid scintillator image to test reconstruction.
** By cutting off the second half of pre-trigger pulse, only 1 pulse giving negative integral.
** Integrating single column of pixels to get 1D curve.
** '''SJ''' suggests looking at smallest pulses to make sure integration is valid; also check negative result.
** Gets an approximate Bragg curve from integrated signal but reflections in image make curve poor.
** '''ABF''' suggests comparing integration windows of 150 ns and lower to Caen ADC data: currently using window over whole pulse.
* ''To Do'':
* ''To Do'':
** Fix negative pulse.
** Computer upgraded to Centos7: fit doesn't work any more (ROOT integrator fails).
** Adjust timing window to replicate Caen spectrum.
** Find a way to deal with very different scintillator slice thicknesses
** Meeting on Monday with '''Tony Price'''.
** Data format of ISDI sensor?
** Make everything more smooth and ready-to-use for users
** Make sure camera hardware is set up ready for DAQ.


'''JS''':
'''JS''':
* Reading (and reading (and reading)) Geant4 manuals, MSci report from '''MH''' and PBTWiki pages on Clatterbridge simulations.
* Making measurements of [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2018/JS_23_01_2018.pdf scintillator sheet thickness]:
** 3 mm sheets are closer to 2.75 mm but variation is mostly below 100 microns.
** 2 mm sheets have 2 groupings:
** 2.0 mm group has better flatness than 2.6 mm group.
* Also been playing around with Clatterbridge simulations:
** Tried running on Centos7.
** Will go back to SL6 as it actually works properly...
* ''To Do'':
** Split up 2 mm sheet results into the 2 groups.
** Meeting with Matthieu on Clatterbridge simulations.
** Get them running on SL6.
 
'''DW''':
* Investigating negative integrated waveforms form LeCroy binary files:
** One bad pulse comes from small tail in leading pulse region.
** Reducing standard deviation for this region cuts out bad pulse.
* Put up instructions on LeCroy binary file conversion for '''Tony Price''' on PBTWiki.
* ''To Do'':
* ''To Do'':
** Will set up meeting with '''MH''' to check progress on Clatterbridge simulations.
** Adding integration window to get spectrum to match Caen ADC data.
** Copy over simulations to user directory to play around with simulations.
** Badger '''Tony Price''' for tracker files.


'''ABF''':
'''ABF''':
* Will get '''JS''' and '''DW''' to check thickness of scintillator sheets.
* Writing paper: finish off plots and majority of writing.
* Update on [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2018/ABF_groupMeeting_17.01.2018.pdf single module detector simulations and scintillator paint tests]:
* Painting scintillator sheets:
** Checking Monte Carlo Truth with detector output.
** Both paints look good so far.
** Still a difference between MC Truth and reconstructed resolutions, but much smaller than before when using mono energetic proton beam.
** Will check on Monday for painting all sheets.
** Resolutions are good enough for paper.
* Final version of 3 month plan requested by '''SJ''':
* Paint tests with scintillator still pending:
** Will include notes from previous meetings and circulate.
** Retested painted scintillator sheet with higher LED voltage: resolution now matches unpainted, wrapped scintillator.
** Will '''not''' include any details of final plans for beam tests: waiting for discussion with '''Ruben Saakyan'''.
** '''SJ''' strongly objected to choice not to decide on complete schedule in advance, but left choice to '''ABF'''.
** '''SJ''' requested to be involved in meeting with '''RS''' regarding final beam schedule.
* ''To Do'':
* ''To Do'':
** Paint another sheet with aerosol.
** Complete main draft of schedule (but NOT including requirements for beam tests).
** Writing paper.
** Painting scintillator.
** Sensor selection for beam test.
** First draft by next week.


'''MH''':
'''MH''':
* Mostly coursework for CDT courses: Numerical Optimisation, High Performance Computing, Machine Learning with Big Data, Research Computing with C++, Inverse Problems in Imaging.
* Finished all first term exams and coursework.
* Background reading on pCT reconstruction and group project at The Economist.
* Second term courses starting to bear fruit!  But needs to learn background mathematics...
** Mathematical background to CT reconstruction.
* Will attend proton imaging workshop in Lyon, 14–15 June.
** Notation in Comp Sci is different...
* Currently compiling Geant4 on Virtual Machine on '''new''' MacBook.
* Staging of Clatterbridge now finished!
** Some behaviour doesn't quite make sense: will investigate.
** Still need to get faster particle readout working with buffering.
* ''To Do'':
* ''To Do'':
** Exams Monday & Tuesday.
** Meeting with Jordan on Wednesday.
** Meeting with Jordan on Wednesday.
** Buffering of readout in Geant4.
** Buffering of readout in Geant4.

Latest revision as of 15:11, 24 January 2018

Minutes for UCL Proton Calorimetry Meeting, 24th January 2018 (D17, Physics & Astronomy, UCL)

Present

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

LK:

  • Investigating image acquisition for Nikon camera:
    • Using SJ liquid scintillator image to test reconstruction.
    • Integrating single column of pixels to get 1D curve.
    • Gets an approximate Bragg curve from integrated signal but reflections in image make curve poor.
  • To Do:
    • Computer upgraded to Centos7: fit doesn't work any more (ROOT integrator fails).
    • Find a way to deal with very different scintillator slice thicknesses
    • Data format of ISDI sensor?
    • Make everything more smooth and ready-to-use for users
    • Make sure camera hardware is set up ready for DAQ.

JS:

  • Making measurements of scintillator sheet thickness:
    • 3 mm sheets are closer to 2.75 mm but variation is mostly below 100 microns.
    • 2 mm sheets have 2 groupings:
    • 2.0 mm group has better flatness than 2.6 mm group.
  • Also been playing around with Clatterbridge simulations:
    • Tried running on Centos7.
    • Will go back to SL6 as it actually works properly...
  • To Do:
    • Split up 2 mm sheet results into the 2 groups.
    • Meeting with Matthieu on Clatterbridge simulations.
    • Get them running on SL6.

DW:

  • Investigating negative integrated waveforms form LeCroy binary files:
    • One bad pulse comes from small tail in leading pulse region.
    • Reducing standard deviation for this region cuts out bad pulse.
  • Put up instructions on LeCroy binary file conversion for Tony Price on PBTWiki.
  • To Do:
    • Adding integration window to get spectrum to match Caen ADC data.
    • Badger Tony Price for tracker files.

ABF:

  • Writing paper: finish off plots and majority of writing.
  • Painting scintillator sheets:
    • Both paints look good so far.
    • Will check on Monday for painting all sheets.
  • Final version of 3 month plan requested by SJ:
    • Will include notes from previous meetings and circulate.
    • Will not include any details of final plans for beam tests: waiting for discussion with Ruben Saakyan.
    • SJ strongly objected to choice not to decide on complete schedule in advance, but left choice to ABF.
    • SJ requested to be involved in meeting with RS regarding final beam schedule.
  • To Do:
    • Complete main draft of schedule (but NOT including requirements for beam tests).
    • Painting scintillator.
    • First draft by next week.

MH:

  • Finished all first term exams and coursework.
  • Second term courses starting to bear fruit! But needs to learn background mathematics...
  • Will attend proton imaging workshop in Lyon, 14–15 June.
  • Currently compiling Geant4 on Virtual Machine on new MacBook.
  • To Do:
    • Meeting with Jordan on Wednesday.
    • Buffering of readout in Geant4.
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