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feat(sim): add --dump-g4-config option to dump Geant4 VMC configuration #1021

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feat(sim): add --dump-g4-config option to dump Geant4 VMC configuration #1021

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045c2c4
feat(sim): add --dump-g4-config option to dump Geant4 VMC configuration
olantwin Feb 3, 2026
3d216b4
fixup! feat(sim): add --dump-g4-config option to dump Geant4 VMC conf…
olantwin Feb 3, 2026
54544c4
fixup! feat(sim): add --dump-g4-config option to dump Geant4 VMC conf…
olantwin Feb 3, 2026
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2 changes: 1 addition & 1 deletion .github/workflows/build-run.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -84,7 +84,7 @@ jobs:
run: |
source /cvmfs/ship.cern.ch/$version/setUp.sh
eval $(alienv load FairShip/latest)
python $FAIRSHIP/macro/run_simScript.py --test --debug 2 --${{ matrix.vessel_option }} --SND --SND_design=${{ matrix.SND_option }} --shieldName ${{ matrix.muon_shield }} --target-yaml=$FAIRSHIP/geometry/target_config_${{ matrix.target }}.yaml --EvtGenDecayer --tag ci-test
python $FAIRSHIP/macro/run_simScript.py --test --debug 2 --${{ matrix.vessel_option }} --SND --SND_design=${{ matrix.SND_option }} --shieldName ${{ matrix.muon_shield }} --target-yaml=$FAIRSHIP/geometry/target_config_${{ matrix.target }}.yaml --EvtGenDecayer --dump-g4-config --tag ci-test

- name: Overlap check
run: |
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5 changes: 5 additions & 0 deletions macro/run_simScript.py
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Expand Up @@ -143,6 +143,7 @@
parser.add_argument("--debug", help="Control FairLogger verbosity: 0=info (default), 1=+debug, 2=+debug1, 3=+debug2", default=0, type=int, choices=range(0,4))
parser.add_argument("--print-fields", help="Print VMC fields and weights information", action="store_true")
parser.add_argument("--check-overlaps", help="Perform geometry overlap checking", action="store_true")
parser.add_argument("--dump-g4-config", help="Dump Geant4 VMC configuration after initialisation", action="store_true")
parser.add_argument("--field_map", default=None, help="Specify spectrometer field map.")
parser.add_argument("--z-offset", dest="z_offset", help="z-offset for the FixedTargetGenerator [mm]", default=-84., type=float)
parser.add_argument(
Expand Down Expand Up @@ -532,6 +533,10 @@
gMC = ROOT.TVirtualMC.GetMC()
fStack = gMC.GetStack()

if options.dump_g4_config:
gMC.ProcessGeantCommand("/run/dumpCouples")
print(f"Stack type: {type(fStack).__name__}")

# -----J/psi external decayer configuration handled in g4config.in------------------------------------
# VMC command /mcPhysics/setExtDecayerSelection J/psi forces external decayer usage
EnergyCut = 10. * u.MeV if options.mudis else 100. * u.MeV
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