Simulation Meeting March 28 2019 1030AM ET
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Contents
[hide]Task List Summary
- Simulation tasks Task List by Dustin
- Simulation tasks Task List by Rakitha
- Main detector simulation tasks Task List by Michael
Simulation Task List Updated 2019
- Simulation tasks
File:MOLLER Tasks List v8 Sim.doc
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
- Radiation/Shielding
- 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
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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