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ExN01DetectorConstruction.cc
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26 // $Id: ExN01DetectorConstruction.cc,v 1.4 2006-06-29 15:29:10 gunter Exp $
27 // $Name: not supported by cvs2svn $
28 // ====================================================================
29 // ExN01DetectorConstruction.cc
30 //
31 // 2005 Q
32 // ====================================================================
33 #include "ExN01DetectorConstruction.hh"
34 
35 #include "G4Material.hh"
36 #include "G4Box.hh"
37 #include "G4Tubs.hh"
38 #include "G4LogicalVolume.hh"
39 #include "G4ThreeVector.hh"
40 #include "G4PVPlacement.hh"
41 #include "G4SystemOfUnits.hh"
42 
43 // ====================================================================
44 //
45 // class description
46 //
47 // ====================================================================
48 
50 ExN01DetectorConstruction::ExN01DetectorConstruction()
51  : experimentalHall_log(0), tracker_log(0),
52  calorimeterBlock_log(0), calorimeterLayer_log(0),
53  experimentalHall_phys(0), calorimeterLayer_phys(0),
54  calorimeterBlock_phys(0), tracker_phys(0)
56 {
57 }
58 
60 ExN01DetectorConstruction::~ExN01DetectorConstruction()
62 {
63 }
64 
66 G4VPhysicalVolume* ExN01DetectorConstruction::Construct()
68 {
69  //------------------------------------------------------ materials
70  G4double a; // atomic mass
71  G4double z; // atomic number
72  G4double density;
73 
74  G4Material* Ar =
75  new G4Material("ArgonGas", z= 18., a= 39.95*g/mole, density= 1.782*mg/cm3);
76 
77  G4Material* Al =
78  new G4Material("Aluminum", z= 13., a= 26.98*g/mole, density= 2.7*g/cm3);
79 
80  G4Material* Pb =
81  new G4Material("Lead", z= 82., a= 207.19*g/mole, density= 11.35*g/cm3);
82 
83  //------------------------------------------------------ volumes
84 
85  //------------------------------ experimental hall (world volume)
86  //------------------------------ beam line along x axis
87 
88  G4double expHall_x = 3.0*m;
89  G4double expHall_y = 1.0*m;
90  G4double expHall_z = 1.0*m;
91  G4Box* experimentalHall_box
92  = new G4Box("expHall_box",expHall_x,expHall_y,expHall_z);
93  experimentalHall_log = new G4LogicalVolume(experimentalHall_box,
94  Ar,"expHall_log",0,0,0);
95  experimentalHall_phys = new G4PVPlacement(0,G4ThreeVector(),
96  experimentalHall_log,
97  "expHall",0,false,0);
98 
99  //------------------------------ a tracker tube
100 
101  G4double innerRadiusOfTheTube = 0.*cm;
102  G4double outerRadiusOfTheTube = 60.*cm;
103  G4double hightOfTheTube = 50.*cm;
104  G4double startAngleOfTheTube = 0.*deg;
105  G4double spanningAngleOfTheTube = 360.*deg;
106  G4Tubs* tracker_tube = new G4Tubs("tracker_tube",innerRadiusOfTheTube,
107  outerRadiusOfTheTube,hightOfTheTube,
108  startAngleOfTheTube,
109  spanningAngleOfTheTube);
110  tracker_log = new G4LogicalVolume(tracker_tube,Al,"tracker_log",0,0,0);
111  G4double trackerPos_x = -1.0*m;
112  G4double trackerPos_y = 0.*m;
113  G4double trackerPos_z = 0.*m;
114  tracker_phys = new G4PVPlacement(0,
115  G4ThreeVector(trackerPos_x,trackerPos_y,trackerPos_z),
116  tracker_log,"tracker",experimentalHall_log,false,0);
117 
118  //------------------------------ a calorimeter block
119 
120  G4double block_x = 1.0*m;
121  G4double block_y = 50.0*cm;
122  G4double block_z = 50.0*cm;
123  G4Box* calorimeterBlock_box = new G4Box("calBlock_box",block_x,
124  block_y,block_z);
125  calorimeterBlock_log = new G4LogicalVolume(calorimeterBlock_box,
126  Pb,"caloBlock_log",0,0,0);
127  G4double blockPos_x = 1.0*m;
128  G4double blockPos_y = 0.0*m;
129  G4double blockPos_z = 0.0*m;
130  calorimeterBlock_phys = new G4PVPlacement(0,
131  G4ThreeVector(blockPos_x,blockPos_y,blockPos_z),
132  calorimeterBlock_log,"caloBlock",experimentalHall_log,false,0);
133 
134  //------------------------------ calorimeter layers
135 
136  G4double calo_x = 1.*cm;
137  G4double calo_y = 40.*cm;
138  G4double calo_z = 40.*cm;
139  G4Box* calorimeterLayer_box = new G4Box("caloLayer_box",
140  calo_x,calo_y,calo_z);
141  calorimeterLayer_log = new G4LogicalVolume(calorimeterLayer_box,
142  Al,"caloLayer_log",0,0,0);
143  for(G4int i=0;i<19;i++) // loop for 19 layers
144  {
145  G4double caloPos_x = (i-9)*10.*cm;
146  G4double caloPos_y = 0.0*m;
147  G4double caloPos_z = 0.0*m;
148  calorimeterLayer_phys = new G4PVPlacement(0,
149  G4ThreeVector(caloPos_x,caloPos_y,caloPos_z),
150  calorimeterLayer_log,"caloLayer",calorimeterBlock_log,false,i);
151  }
152 
153  //------------------------------------------------------------------
154 
155  return experimentalHall_phys;
156 }
157 
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