source: trunk/source/processes/electromagnetic/standard/src/G4MultipleScattering.cc@ 1192

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
// $Id: G4MultipleScattering.cc,v 1.75 2008/10/15 17:53:44 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-02 $
//
// -----------------------------------------------------------------------------
//
// GEANT4 Class file
//
// File name:     G4MultipleScattering
//
// Author:        Laszlo Urban
//
// Creation date: March 2001
// 
// 16/05/01 value of cparm changed , L.Urban
// 18/05/01 V.Ivanchenko Clean up against Linux ANSI compilation
// 07/08/01 new methods Store/Retrieve PhysicsTable (mma)
// 23-08-01 new angle and z distribution,energy dependence reduced,
//          Store,Retrieve methods commented out temporarily, L.Urban
// 27-08-01 in BuildPhysicsTable:aParticleType.GetParticleName()=="mu+" (mma)
// 28-08-01 GetContinuousStepLimit and AlongStepDoIt moved from .icc file (mma)
// 03-09-01 value of data member factlim changed, L.Urban
// 10-09-01 small change in GetContinuousStepLimit, L.Urban
// 11-09-01 G4MultipleScatteringx put as default G4MultipleScattering
//          store/retrieve physics table reactivated (mma)
// 13-09-01 corr. in ComputeTransportCrossSection, L.Urban
// 14-09-01 protection in GetContinuousStepLimit, L.Urban
// 17-09-01 migration of Materials to pure STL (mma)
// 27-09-01 value of data member factlim changed, L.Urban
// 31-10-01 big fixed in PostStepDoIt,L.Urban
// 17-04-02 NEW angle distribution + boundary algorithm modified, L.Urban
// 22-04-02 boundary algorithm modified -> important improvement in timing 
// 24-04-02 some minor changes in boundary algorithm, L.Urban
// 06-05-02 bug fixed in GetContinuousStepLimit, L.Urban
// 24-05-02 changes in angle distribution and boundary algorithm, L.Urban
// 11-06-02 bug fixed in ComputeTransportCrossSection, L.Urban
// 12-08-02 bug fixed in PostStepDoIt (lateral displacement), L.Urban
// 15-08-02 new angle distribution, L.Urban
// 26-09-02 angle distribution + boundary algorithm modified, L.Urban
// 15-10-02 temporary fix for proton scattering
// 30-10-02 modified angle distribution,mods in boundary algorithm,
//          changes in data members, L.Urban
// 11-12-02 precision problem in ComputeTransportCrossSection
//          for small Tkin/for heavy particles cured from L.Urban
// 20-01-03 Migrade to cut per region (V.Ivanchenko)
// 05-02-03 changes in data members, new sampling for geom.
//          path length, step dependence reduced with new
//          method
// 28-03-03 Move to model design (V.Ivanchenko)
// 08-08-03 STD substitute standard  (V.Ivanchenko)
// 23-04-04 value of data member dtrl changed from 0.15 to 0.05 (L.Urban)
// 17-08-04 name of facxsi changed to factail (L.Urban)
// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
// 07-02-05 correction in order to have a working Setsamplez function (L.Urban)
// 15-04-05 optimize internal interface (V.Ivanchenko)
// 12-09-05 new TruePathLengthLimit - facrange works for every track from
//             start, geometry also influences the limit
// 02-10-05 conditions limiting the step are finalized + code cleaning (L.Urban)
// 03-10-05 weaker step limitation for Tkin > Tlimit (L.Urban)
// 05-10-05 value of data member tlimitmin has been changed (L.Urban)
// 06-10-05 correction in TruePathLengthLimit, timing improved.(L.Urban)
// 07-10-05 bug fixed in TruePathLengthLimit (L.Urban)
// 11-10-05 change in TruePathLengthLimit conditions,slightly better 
//          timing and much weaker cut dependence (L.Urban)
// 13-10-05 move SetFacrange(0.02) from InitialiseProcess to constructor
// 23-10-05 new Boolean data member prec (false ~ 7.1 like, true new step
//          limit in TruePathLengthLimit, L.Urban)
// 25-10-05 prec renamed to steppingAlgorithm, set function triggers
//          'default' facrange too, true - 0.02, false - 0.2 (L.Urban)
// 26-10-05 the above is put in the function MscStepLimitation() (mma)
// 05-11-05 tlimitmin = facrange*rungecut (instead of a fixed value)L.Urban
// 13-11-05 some code cleaning, slightly better timing (L.Urban)
// 01-12-05 add control on verbosity in SetMscStepLimitation
// 06-12-05 tlimitmin = facrange*rangecut(e-) for every particle
// 07-12-05 volume name World removed, rangecut computed using index
//          instead of particle name L.Urban
// 08-12-05 world is now: navigator->GetWorldVolume() L.Urban
// 11-12-05 data member rangecut removed, steplimit does not depend
//          on cut any more (L.Urban)
// 17-01-06 value of data member factail changed (1. --> 0.75),
//          value of facgeom is 3.5 instead of 4 (L.Urban)
// 19-01-07 tlimitmin = facrange*50*micrometer, i.e. it depends on the
//          value of facrange (L.Urban) 
// 16-02-06 value of factail changed, samplez = true (L.Urban)
// 07-03-06 Create G4UrbanMscModel and move there step limit calculation (VI)
// 10-05-06 SetMscStepLimitation at initialisation (V.Ivantchenko)
// 11-05-06 values of data members tkinlimit, factail have been 
//          changed (L.Urban) 
// 13-10-06 data member factail removed, new data member skin
//          together with set function, data member tkinlimit
//          changed to lambdalimit (L.Urban)
// 20-10-06 default value of skin = 0 (no single scattering),
//          single scattering for skin > 0,
//          there is no z sampling by default  (L.Urban)
// 23-10-06 skin = 1 by default (L.Urban)
// 23-11-06 skin = 1 by default for e+-, 0 for other particles (VI)
// 12-02-07 skin can be changed via UI command, default skin=1 (VI)
// 24-04-07 default skin=0 (temporal protection) (VI)
// 11-03-08 use G4VMscModel interface (VI)
//
// -----------------------------------------------------------------------------
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

#include "G4MultipleScattering.hh"
#include "G4UrbanMscModel.hh"
#include "G4MscStepLimitType.hh"
#include "G4UrbanMscModel.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

using namespace std;

G4MultipleScattering::G4MultipleScattering(const G4String& processName)
  : G4VMultipleScattering(processName)
{
  isInitialized = false;  
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4MultipleScattering::~G4MultipleScattering()
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4bool G4MultipleScattering::IsApplicable (const G4ParticleDefinition& p)
{
  return (p.GetPDGCharge() != 0.0 && !p.IsShortLived());
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void G4MultipleScattering::InitialiseProcess(const G4ParticleDefinition* p)
{
  // Modification of parameters between runs
  if(isInitialized) {
    if (p->GetParticleType() != "nucleus") {
      mscUrban->SetStepLimitType(StepLimitType());
      mscUrban->SetLateralDisplasmentFlag(LateralDisplasmentFlag());
      mscUrban->SetSkin(Skin());
      mscUrban->SetRangeFactor(RangeFactor());
      mscUrban->SetGeomFactor(GeomFactor());
    }
    return;
  }

  // defaults for ions, which cannot be overwritten
  if (p->GetParticleType() == "nucleus") {
    SetStepLimitType(fMinimal);
    SetLateralDisplasmentFlag(false);
    SetBuildLambdaTable(false);
  }

  // initialisation of parameters - defaults for particles other
  // than ions can be overwritten by users
  mscUrban = new G4UrbanMscModel();
  mscUrban->SetStepLimitType(StepLimitType());
  mscUrban->SetLateralDisplasmentFlag(LateralDisplasmentFlag());
  mscUrban->SetSkin(Skin());
  mscUrban->SetRangeFactor(RangeFactor());
  mscUrban->SetGeomFactor(GeomFactor());

  AddEmModel(1,mscUrban);
  isInitialized = true;
  /*
  G4cout << "G4MultipleScattering::InitialiseProcess for " 
         << p->GetParticleName()
         << " skin= " << Skin()
         << " SA= " << steppingAlgorithm
         << G4endl;
  */
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void G4MultipleScattering::PrintInfo()
{
  G4cout << "      RangeFactor= " << RangeFactor()
         << ", step limit type: " << StepLimitType()
         << ", lateralDisplacement: " << LateralDisplasmentFlag()
         << ", skin= " << Skin()  
         << ", geomFactor= " << GeomFactor()  
         << G4endl;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......