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Please consider the following formatting changes to AliceO2Group#15615
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…on support - TPCDetParam.UseGeant4Edep: use Geant4's own energy deposit for ionisation instead of Bethe-Bloch/NA49, with a configurable SpecialCutsGeV threshold - Adds the Kr-83m decay generator (GeneratorKrDecay) as a compiled Generator subclass in Detectors/TPC/simulation, with a thin krGenerator.C macro for use as an o2-sim external generator - Adds plotCluster.C for viewing the resulting calibration spectrum
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TPCDetParam.UseGeant4Edep, an opt-in flag (default off) that uses Geant4's energy deposit directly for ionisation inDetector::ProcessHits, with Fano-limited charge fluctuation via a Gamma-distributed smear (mean/variance tuned for GEANT4). Used for 83mKr TPC calibration simulations.SetSpecialPhysicsCuts()callsmatmgr.SpecialCut()for the TPC drift-gas media before the base class readssimcuts.dat(which sets a 10 keV default for these media). This is now exposed asTPCDetParam.SpecialCutsGeV(default 1e-6 GeV = 1 keV), so the actual effective cutcan be set via configKeyValues.