Simulation Meeting October 19 2019 1030AM ET

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Simulation Task List Updated 2019

• Simulation tasks (new) File:MOLLER Tasks List v8 Sim.doc
• Simulation tasks Task List by Dustin
• Simulation tasks Task List by Rakitha
• Main detector simulation tasks Task List by Michael

Agenda

• Get new people up to speed
• Plan new simulation software updates (raster, etc.)
• Get the geometry specified and understood, shared with JLab (Sandesh) and SBU CAD (Cameron)

Attendance

Attendance:

Notes from Thursday

• Detector geometry gdml file is generated by an editable CSV file. See https://github.com/JeffersonLab/remoll-detector-generator/blob/master/cadp_documented.csv
  • We make changes in cadp.csv and reexecute the perl scripts, then everything downstream is changed in all downstream implementations
  • Catherine Feldman is actively working on updating the detector geometry definitions with the shorter experiment (with Cameron and Sakib)
• Simulation list google doc keeps a list of important simulation tasks.
  • https://docs.google.com/spreadsheets/d/1daSyQ_glMwk_uL4FY8ry0YK0w2bsamhofvxaXgqsAqo/edit#gid=0
• Dimitry (Temple U) will start setting the simulation up this week. He can then start contributing to detector area shielding design and support structure studies.

Notes from Saturday

• Sakib has added some beam pipes for He and Vacuum cases
  • These are documented in his repository (www.github.com/rahmans1/TestGeo)
  • There are two blessed versions (https://github.com/rahmans1/TestGeo/blob/geature-col4%2B5-merged-bpipe-beamshield-3mair/mollerMother_merged1.gdml) (https://github.com/rahmans1/TestGeo/blob/feature-col4%2B5-merged-bpipe-beamshield-helium/mollerMother_merged1.gdml)
  • The lintels in this are subject to change
    • The problem is they were doing too much extra slit scattering and making a mess
  • Sakib will start a versioning document for Sandesh and us to keep track with
• The coordinate shift is not entirely clear whether we should edit all z vertexes, or just the offsets: https://github.com/JeffersonLab/remoll/issues/287
• Example minimum case working macro from Sakib (old z-reference frame, new develop)

/remoll/setgeofile /home/rahmans/geometry/geometry_optics_beam/mollerMother_merged1.gdml
/remoll/physlist/register QGSP_BERT_HP
/remoll/physlist/parallel/enable
/remoll/parallel/setfile /home/rahmans/geometry/geometry_optics_beam/mollerParallel.gdml
/run/numberOfThreads 5
/run/initialize
/remoll/addfield /home/rahmans/map/default/text/hybridJLAB.txt
/remoll/addfield /home/rahmans/map/default/text/upstreamJLAB_1.25.txt
/remoll/evgen/set beam
/remoll/evgen/beam/origin 0 0 -2.5 m
/remoll/evgen/beam/rasx 5 mm
/remoll/evgen/beam/rasy 5 mm
/remoll/evgen/beam/corrx 0.149
/remoll/evgen/beam/corry 0.149
/remoll/evgen/beam/rasrefz 0.5 m
/remoll/beamene 11 GeV
/remoll/beamcurr 85 microampere
/remoll/SD/disable_all
/remoll/SD/enable 32
/remoll/SD/detect lowenergyneutral 32
/remoll/SD/detect secondaries 32
/remoll/kryptonite/enable true
[do the kryptonite macro here]
/remoll/filename /global/scratch/rahmans/scratch/targetStudy/shortened_newcol12_uv_JLAB_75/beam/beam_1.root
/run/beamOn 10000

Simulation Notes for new people

Things that are happening

• Previous Simulation efforts
  • Skyshine shielding - Rakitha, Cameron, Ciprian
  • Target region optimization - Rakitha
  • Envelope production and FOM optimization - Cameron, Sakib
• Ongoing Simulation efforts
  • Spectrometer sensitivity studies and optimization - Juliette, Sakib
    • Verifying that the GDML definition is up to date - GitHub tracking
    • Cementing how to do energy deposition in spectrometer coil studies
  • Helium vs. Vacuum study and central beamline optimization - Sakib, Ciprian
  • Detector array optimization - Catherine, Cameron
  • Detector region radiation load and shielding - Dmitri, Don, Cameron
  • Beam energy change effects on the experiment's feasibility (spectrometer dose, radiation, FOM, collimator energy deposition, etc.) - GitHub tracking
• Needed Simulation efforts
  • Properly tracking the conditions under which the simulation was made, s.t. results can be replicated - Wouter
• Recent Software updates
  • Trajectory storage - Catherine, Cameron
  • Central fringe magnetic fields - Sakib, Juliette
  • Detector geometry update and z-shift - Wouter, Sakib
• Wanted Software updates
  • Proper implementation of tracking
  • Proper implementation of JAPAN-ready faux data

How to run remoll/gdml simulations in G4

Get an account on various things

• JLab wiki, docdb, and ifarm user account
  • ifarm batch system certificate:
• SBU mocha
• SBU ELOG
• Virginia ELOG

How to analyze remoll data meaningfully

stub

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