OscarProducer : Geant4-based Detector Simulation Module

• untracked bool Verbosity - False by default; if True, will allow printouts of various service information
• bool UseLocalMagFieldManager - False by default; the alternative option (True) is not necessarily practical, because CMS settings for tracking in the magnetic field are optimal (CMS IN-2008/001); the True can be used for some specific, advanced studies, to require particular conditions and accuracies in one or another sub-area of CMS detector; if chosen True, a dedicated subset of parameters to define local magnetic field managed will be needed - instructions will be added on demand
• PSet ConfGlobalMFM - a subset of parameters to specify accuracy of Geant4 tracking in the magnetic field; as already mantioned above, the default settings are optimal and are NOT recommended to change; the settings apply to the global "mother" volume and propagate to all sub-systems of the CMS detector
• double delta - expressed in mm and defines magnetic field "caching", i.e. if the Geant4 tracking step is less that delta, the magnetic field is re-used from the previous point rather than being retrieved from the map (or re-calculated from parametrization)
  
  

• string type - this is by far one of the most important parameters, as it selects the physics list, that is a composition of models within Geant4 to simulate interactions with matter of various particles in different energy ranges; the default is "SimG4Core/Physics/QGSP_BERT_EMV", where the SimG4Core/Application tells the loader the location of the physics list, and QGSP_BERT_EMV is the physics list itself; the choice has been made upon very detailed study by the CMS HCAL Simulation Task Force (the link will serve as temporary reference until the Task Force Report is published); in principle, CMS Simulation software provides a variety of other physics lists, such as (old) LHEP, QGSP, QGSP_EMV, etc., as well as "dummy" lists for testing purposes, such as DummyPhysics (EM processes only)
• double G4BremsstrahlungThreshold -
• double DefaultCutValue - expressed in cm, default is 1.; this defines minimal distance that a particle must be particle must be able to travel in material, before its kinetic energy runs off; if particle's kinetic energy is not sufficient to travel upon specified distance in a given material, the particle is considered "non-tracebale" and is stopped right there, with its energy to be deposited on the spot
• bool CutsPerRegion - default is True; it defines that in certain subsystems of the CMS detector specific cuts will apply and will override the "global" default one described right above; those specific cuts are given together with geometry specifications, via dedicated XML sources
• bool Verbosity - default is False; if True, a large amount of service information will be printed out
• PSet GFlash - this option is False by default; in principal, this subset of parameters activates parametrized simulation of EM and in perspecive of HAD showers in the CMS Calorimeters; the feature is currently in the stage of fine-tuning for EM showers and in advanced development for HAD showers

NOTE: the whole family of bool parameters starting with 'Flag' are NOT of practical interest to end-users and are there for testing newly-added physics lists, such as QBBC

• PSet Generator - to select generator's particles to be traced through detector, based on user-defined kinematic cuts

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