Ex01DetectorConstructionOld.cxx

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//------------------------------------------------
// The Virtual Monte Carlo examples
// Copyright (C) 2007 - 2014 Ivana Hrivnacova
// All rights reserved.
//
// For the licensing terms see geant4_vmc/LICENSE.
// Contact: root-vmc@cern.ch
//-------------------------------------------------
 
/// \file Ex01DetectorConstructionOld.cxx
/// \brief Implementation of the Ex01DetectorConstructionOld class
///
/// Geant4 ExampleN03 adapted to Virtual Monte Carlo \n
/// Id: Ex01DetectorConstructionOld.cc,v 1.11 2002/01/09 17:24:09 ranjard Exp \n
/// GEANT4 tag Name: geant4-04-00-patch-02
///
/// \date 21/04/2002
/// \author I. Hrivnacova; IPN, Orsay
 
#include <iostream>
 
#include <TVirtualMC.h>
 
#include "Ex01DetectorConstructionOld.h"
 
/// \cond CLASSIMP
ClassImp(Ex01DetectorConstructionOld)
  /// \endcond
 
  using namespace std;
 
//_____________________________________________________________________________
Ex01DetectorConstructionOld::Ex01DetectorConstructionOld()
  : TObject(), fImedAr(0), fImedAl(0), fImedPb(0)
{
  /// Default constructor
}
 
//_____________________________________________________________________________
Ex01DetectorConstructionOld::~Ex01DetectorConstructionOld()
{
  /// Destructor
}
 
//_____________________________________________________________________________
void Ex01DetectorConstructionOld::ConstructMaterials()
{
  /// Construct materials using VMC functions
 
  Double_t a;
  Double_t z;
  Double_t density;
  Double_t radl;
  Double_t absl;
  Float_t* ubuf = 0;
 
  a = 39.95;
  z = 18.;
  density = 1.782e-03;
  radl = 0.1;
  absl = 0.1;
  Int_t imatAr;
  gMC->Material(imatAr, "ArgonGas", a, z, density, radl, absl, ubuf, 0);
 
  a = 26.98;
  z = 13.;
  density = 2.7;
  radl = 0.1;
  absl = 0.1;
  Int_t imatAl;
  gMC->Material(imatAl, "Aluminium", a, z, density, radl, absl, ubuf, 0);
  // user defined parameters (only for test)
  // Float_t ubuf2[3];
  // ubuf2[0]=5.5; ubuf2[1]=6.5; ubuf2[2] = 7.5;
  // gMC->Material(imatAl, "Aluminium", a, z, density, radl, absl, ubuf2, 3);
 
  a = 207.19;
  z = 82.;
  density = 11.35;
  radl = 0.1;
  absl = 0.1;
  Int_t imatLead;
  gMC->Material(imatLead, "Lead", a, z, density, radl, absl, ubuf, 0);
 
  // Polyethylene
  // Mixture defined with the negative number of component, to test updating
  // wmat. (If nlmat < 0 then wmat contains the number of atoms of a given kind
  // into the molecule of the compound. In this case, wmat in output is changed
  // to relative weights.)
  Float_t apoly[2] = { 12.01, 1. };
  Float_t zpoly[2] = { 6., 1. };
  Float_t wpoly[2] = { .33, .67 };
  Int_t imatPoly;
  cout << "imatPoly"
       << " wpoly: " << wpoly[0] << ", " << wpoly[1] << endl;
  gMC->Mixture(imatPoly, "POLYETHYLEN0$", apoly, zpoly, .95, -2, wpoly);
  cout << "imatPoly"
       << " wpoly: " << wpoly[0] << ", " << wpoly[1] << endl;
 
  //
  // Tracking medias
  //
 
  Int_t ifield = 0;        // No magnetic field
  Double_t fieldm = 0.;    //
  Double_t epsil = .001;   // Tracking precision,
  Double_t stemax = -0.01; // Maximum displacement for multiple scat
  Double_t tmaxfd = -20.;  // Maximum angle due to field deflection
  Double_t deemax = -.3;   // Maximum fractional energy loss, DLS
  Double_t stmin = -.8;
  gMC->Medium(fImedAr, "ArgonGas", imatAr, 0, ifield, fieldm, tmaxfd, stemax,
    deemax, epsil, stmin, ubuf, 0);
  gMC->Medium(fImedAl, "Aluminium", imatAl, 0, ifield, fieldm, tmaxfd, stemax,
    deemax, epsil, stmin, ubuf, 0);
  gMC->Medium(fImedPb, "Lead", imatLead, 0, ifield, fieldm, tmaxfd, stemax,
    deemax, epsil, stmin, ubuf, 0);
}
 
//_____________________________________________________________________________
void Ex01DetectorConstructionOld::ConstructVolumes()
{
  /// Construct volumes using VMC functions
 
  //------------------------------ experimental hall (world volume)
  //------------------------------ beam line along x axis
 
  Double_t expHall[3];
  expHall[0] = 300.;
  expHall[1] = 100.;
  expHall[2] = 100.;
  gMC->Gsvolu("EXPH", "BOX", fImedAr, expHall, 3);
 
  //------------------------------ a tracker tube
 
  Double_t trackerTube[3];
  trackerTube[0] = 0.;
  trackerTube[1] = 60.;
  trackerTube[2] = 50.;
  gMC->Gsvolu("TRTU", "TUBE", fImedAl, trackerTube, 3);
 
  Double_t posX = -100.;
  Double_t posY = 0.;
  Double_t posZ = 0.;
  gMC->Gspos("TRTU", 1, "EXPH", posX, posY, posZ, 0, "ONLY");
 
  //------------------------------ a calorimeter block
 
  Double_t calBox[3];
  calBox[0] = 100.;
  calBox[1] = 50.;
  calBox[2] = 50.;
  gMC->Gsvolu("CALB", "BOX", fImedPb, calBox, 3);
 
  posX = 100.;
  posY = 0.;
  posZ = 0.;
  gMC->Gspos("CALB", 1, "EXPH", posX, posY, posZ, 0, "ONLY");
 
  //------------------------------ calorimeter layers
 
  Double_t layerBox[3];
  layerBox[0] = 1.;
  layerBox[1] = 40.;
  layerBox[2] = 40.;
  gMC->Gsvolu("LAYB", "BOX", fImedAl, layerBox, 3);
 
  for (Int_t i = 0; i < 19; i++) {
    posX = (i - 9) * 10.;
    posY = 0.;
    posZ = 0.;
    gMC->Gspos("LAYB", i, "CALB", posX, posY, posZ, 0, "ONLY");
  }
}