Difference between revisions of "Simulation Meeting March 28 2019 1030AM ET"

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* Main detector simulation tasks [https://hallaweb.jlab.org/wiki/images/f/fc/MOLLER-Tasks-List-MainDetector_Michael.pdf Task List by Michael]
 
* Main detector simulation tasks [https://hallaweb.jlab.org/wiki/images/f/fc/MOLLER-Tasks-List-MainDetector_Michael.pdf Task List by Michael]
 
==Simulation Task List Updated 2019==
 
==Simulation Task List Updated 2019==
−
* Simulation tasks [[File:MOLLER Tasks List v8 Sim Only.pdf]]
+
* Simulation tasks [[File:MOLLER Tasks List v8 Sim Only.pdf]] [[File:MOLLER_Tasks_List_v8_Sim.doc]]
  
 
==Agenda==
 
==Agenda==
Line 17: Line 17:
  
 
* Simulation task list discussion
 
* Simulation task list discussion
 +
** Radiation/Shielding
 +
*** Radiation load on hybrid toroid nose: Rakitha, Juliette
 +
*** Radiation shielding and activation: Rakitha, Kent, and Ciprian
 +
** Overall Background studies:
 +
*** Air/vacuum?He simulation studies: Ciprian
 +
*** Slit scattering background* (the elimination of all 1-bounce sources and the leading 2-bounce sources): KK (student?)
 +
** General Spectrometer:
 +
*** Multi-loop spectrometer option: Juliette
 +
** Detector area background:
 +
*** Optimized main detector geometries: Ciprian
 +
*** Detector Shielding Optimization*: KK, Cameron
 +
*** Shower-max splashback: KK (student?)
 +
*** Crosstalk evaluation: KK (student?)
 +
*** PMT backgrounds*: Juliette, Sakib
 +
*** PMT double-differences: Ciprian, Kent
 +
*** Muon pair production: Wouter
 +
*** Beam dump background impact on Pion detector: Wouter
 +
*** Beam dump background impact on the Main detector (Beam dump background estimate and shielding requirements):?
 +
*** Hyperon background estimation*: Wouter
 +
** Tracking:
 +
*** Optics Collimator for Q2*: Seamus, David A.
 +
** Theory:
 +
*** Radiative corrections for all physics processes: Seamus, Yuri
 
* Simulation software updates:
 
* Simulation software updates:
−
** Raster update: Is raster size is at the center of the target or at the upstream of the target?
+
** Raster update: use the new raster with beam generator in develop branch
−
** Energy deposit
+
** Energy deposit: The discrepancy may have been due to old and new raster applied simultaneously. The physics list QGSP_BERT vs. QGSP_BERT_HP can have 10% discrepancy in energy.
 
* Pull requests [https://github.com/JeffersonLab/remoll/pulls]:
 
* Pull requests [https://github.com/JeffersonLab/remoll/pulls]:
 
** into master
 
** into master
Line 31: Line 54:
 
*** [https://github.com/JeffersonLab/remoll/pull/246 bfield header]
 
*** [https://github.com/JeffersonLab/remoll/pull/246 bfield header]
 
* Issues [https://github.com/JeffersonLab/remoll/issues]
 
* Issues [https://github.com/JeffersonLab/remoll/issues]
 +
* Are we going to add fringe field map files in the simulation by default?
 +
* Cameron: SLAC test data analysis and simulation: [https://ace.phys.virginia.edu:80/MollerSpectrometer/388 slides]
  
−
==Attendance:==
+
==Attendance==
 
Attendance:  
 
Attendance:  
−
 
+
Cameron, Wouter, Chandan, Ciprian, Sakib, Michael
  
 
==Minutes==
 
==Minutes==
−
 
+
Simulation Results:
−
 
+
* SLAC data analysis and simulation
 +
** Use a Poissonian sampling to stack events together instead of changing simulation instead
 +
Pull Requests:
 +
* Beam generator raster
 +
** Works, makes sense, built off of Jay's raster design
 +
** Should be ported over to other generators soon too
 +
* Power Deposition
 +
** QGSP bert and HP are not identical
 +
* Release candidate 2.1
 +
** Is done, snapshot of March 21st
 +
** Includes new standard sets of plots and unit and physics tests
 +
** One bug/qustion about a slower Moller generator
 +
** Will merge later today
 +
** First new master branch since last Summer, includes new mutexes to improve performance
 +
* Adding a macro command manual
 +
* Adding a PDF booklet of unit/physics test outputs
 +
** Should add some optical physics tests
 +
* Raster update
 +
** Updating the raster definition with Silviu and Jay's raster calculations
 +
* Target length update to 1.25m
 +
** Delete defunct target len and pos macros
 +
** Update from March 2019 collaboration meeting target changes
 +
* CMake command added that can allow the user to specify additional field downloading at "cmake .." with "-d" flag
 +
** Updates magnetic fields to not have any gaps in phi
 +
** other PR for magnetic field header file to give warnings
 +
** Fringe fields are being investigated, and so is the interpolation technique
 +
Issues:
 +
* Low energy neutrals "missing"
 +
** QGSP_bert physics list has been default for a while
 +
** QGSP_bert_HP (high precision) will probably fix low energy neutral abundance problem
 +
** Add a warning to GDML aux tag to alert the user to use an appropriate physics list for "lowenergyneutral" detector types
 +
* Collimator power and coil sensitivity variations
 +
** Rerunning the simulation for a million events gives ~10% deviations in results from run to run sometimes
 +
** Instead of single-run simulating do N fold million/N runs and calculate mean and RMS (and also see if the RMS behaves as counts vary)
  
 
<br><br> Return to [[Simulation_Meetings | Simulation Meetings]]
 
<br><br> Return to [[Simulation_Meetings | Simulation Meetings]]
 
<br> Return to [[Main_Page|Main Page]]
 
<br> Return to [[Main_Page|Main Page]]

Latest revision as of 15:41, 28 March 2019

Back to Main Page >> Simulation Meetings

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Task List Summary

Simulation Task List Updated 2019

Agenda

JLab room CC B101 is reserved for the meeting

  • Simulation task list discussion
    • Radiation/Shielding
      • Radiation load on hybrid toroid nose: Rakitha, Juliette
      • Radiation shielding and activation: Rakitha, Kent, and Ciprian
    • Overall Background studies:
      • Air/vacuum?He simulation studies: Ciprian
      • Slit scattering background* (the elimination of all 1-bounce sources and the leading 2-bounce sources): KK (student?)
    • General Spectrometer:
      • Multi-loop spectrometer option: Juliette
    • Detector area background:
      • Optimized main detector geometries: Ciprian
      • Detector Shielding Optimization*: KK, Cameron
      • Shower-max splashback: KK (student?)
      • Crosstalk evaluation: KK (student?)
      • PMT backgrounds*: Juliette, Sakib
      • PMT double-differences: Ciprian, Kent
      • Muon pair production: Wouter
      • Beam dump background impact on Pion detector: Wouter
      • Beam dump background impact on the Main detector (Beam dump background estimate and shielding requirements):?
      • Hyperon background estimation*: Wouter
    • Tracking:
      • Optics Collimator for Q2*: Seamus, David A.
    • Theory:
      • Radiative corrections for all physics processes: Seamus, Yuri
  • Simulation software updates:
    • Raster update: use the new raster with beam generator in develop branch
    • Energy deposit: The discrepancy may have been due to old and new raster applied simultaneously. The physics list QGSP_BERT vs. QGSP_BERT_HP can have 10% discrepancy in energy.
  • Pull requests [1]:
  • Issues [2]
  • Are we going to add fringe field map files in the simulation by default?
  • Cameron: SLAC test data analysis and simulation: slides

Attendance

Attendance: Cameron, Wouter, Chandan, Ciprian, Sakib, Michael

Minutes

Simulation Results:

  • SLAC data analysis and simulation
    • Use a Poissonian sampling to stack events together instead of changing simulation instead

Pull Requests:

  • Beam generator raster
    • Works, makes sense, built off of Jay's raster design
    • Should be ported over to other generators soon too
  • Power Deposition
    • QGSP bert and HP are not identical
  • Release candidate 2.1
    • Is done, snapshot of March 21st
    • Includes new standard sets of plots and unit and physics tests
    • One bug/qustion about a slower Moller generator
    • Will merge later today
    • First new master branch since last Summer, includes new mutexes to improve performance
  • Adding a macro command manual
  • Adding a PDF booklet of unit/physics test outputs
    • Should add some optical physics tests
  • Raster update
    • Updating the raster definition with Silviu and Jay's raster calculations
  • Target length update to 1.25m
    • Delete defunct target len and pos macros
    • Update from March 2019 collaboration meeting target changes
  • CMake command added that can allow the user to specify additional field downloading at "cmake .." with "-d" flag
    • Updates magnetic fields to not have any gaps in phi
    • other PR for magnetic field header file to give warnings
    • Fringe fields are being investigated, and so is the interpolation technique

Issues:

  • Low energy neutrals "missing"
    • QGSP_bert physics list has been default for a while
    • QGSP_bert_HP (high precision) will probably fix low energy neutral abundance problem
    • Add a warning to GDML aux tag to alert the user to use an appropriate physics list for "lowenergyneutral" detector types
  • Collimator power and coil sensitivity variations
    • Rerunning the simulation for a million events gives ~10% deviations in results from run to run sometimes
    • Instead of single-run simulating do N fold million/N runs and calculate mean and RMS (and also see if the RMS behaves as counts vary)



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