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ExN01DetectorConstruction.cc
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25 //
26 // ====================================================================
27 // ExN01DetectorConstruction.cc
28 //
29 // 2005 Q
30 // ====================================================================
31 #include "ExN01DetectorConstruction.hh"
32 
33 #include "G4Material.hh"
34 #include "G4Box.hh"
35 #include "G4Tubs.hh"
36 #include "G4LogicalVolume.hh"
37 #include "G4ThreeVector.hh"
38 #include "G4PVPlacement.hh"
39 #include "G4SystemOfUnits.hh"
40 
41 // ====================================================================
42 //
43 // class description
44 //
45 // ====================================================================
46 
48 ExN01DetectorConstruction::ExN01DetectorConstruction()
49  : experimentalHall_log(0), tracker_log(0),
50  calorimeterBlock_log(0), calorimeterLayer_log(0),
51  experimentalHall_phys(0), calorimeterLayer_phys(0),
52  calorimeterBlock_phys(0), tracker_phys(0)
54 {
55 }
56 
58 ExN01DetectorConstruction::~ExN01DetectorConstruction()
60 {
61 }
62 
64 G4VPhysicalVolume* ExN01DetectorConstruction::Construct()
66 {
67  //------------------------------------------------------ materials
68  G4double a; // atomic mass
69  G4double z; // atomic number
70  G4double density;
71 
72  G4Material* Ar =
73  new G4Material("ArgonGas", z= 18., a= 39.95*g/mole, density= 1.782*mg/cm3);
74 
75  G4Material* Al =
76  new G4Material("Aluminum", z= 13., a= 26.98*g/mole, density= 2.7*g/cm3);
77 
78  G4Material* Pb =
79  new G4Material("Lead", z= 82., a= 207.19*g/mole, density= 11.35*g/cm3);
80 
81  //------------------------------------------------------ volumes
82 
83  //------------------------------ experimental hall (world volume)
84  //------------------------------ beam line along x axis
85 
86  G4double expHall_x = 3.0*m;
87  G4double expHall_y = 1.0*m;
88  G4double expHall_z = 1.0*m;
89  G4Box* experimentalHall_box
90  = new G4Box("expHall_box",expHall_x,expHall_y,expHall_z);
91  experimentalHall_log = new G4LogicalVolume(experimentalHall_box,
92  Ar,"expHall_log",0,0,0);
93  experimentalHall_phys = new G4PVPlacement(0,G4ThreeVector(),
94  experimentalHall_log,
95  "expHall",0,false,0);
96 
97  //------------------------------ a tracker tube
98 
99  G4double innerRadiusOfTheTube = 0.*cm;
100  G4double outerRadiusOfTheTube = 60.*cm;
101  G4double hightOfTheTube = 50.*cm;
102  G4double startAngleOfTheTube = 0.*deg;
103  G4double spanningAngleOfTheTube = 360.*deg;
104  G4Tubs* tracker_tube = new G4Tubs("tracker_tube",innerRadiusOfTheTube,
105  outerRadiusOfTheTube,hightOfTheTube,
106  startAngleOfTheTube,
107  spanningAngleOfTheTube);
108  tracker_log = new G4LogicalVolume(tracker_tube,Al,"tracker_log",0,0,0);
109  G4double trackerPos_x = -1.0*m;
110  G4double trackerPos_y = 0.*m;
111  G4double trackerPos_z = 0.*m;
112  tracker_phys = new G4PVPlacement(0,
113  G4ThreeVector(trackerPos_x,trackerPos_y,trackerPos_z),
114  tracker_log,"tracker",experimentalHall_log,false,0);
115 
116  //------------------------------ a calorimeter block
117 
118  G4double block_x = 1.0*m;
119  G4double block_y = 50.0*cm;
120  G4double block_z = 50.0*cm;
121  G4Box* calorimeterBlock_box = new G4Box("calBlock_box",block_x,
122  block_y,block_z);
123  calorimeterBlock_log = new G4LogicalVolume(calorimeterBlock_box,
124  Pb,"caloBlock_log",0,0,0);
125  G4double blockPos_x = 1.0*m;
126  G4double blockPos_y = 0.0*m;
127  G4double blockPos_z = 0.0*m;
128  calorimeterBlock_phys = new G4PVPlacement(0,
129  G4ThreeVector(blockPos_x,blockPos_y,blockPos_z),
130  calorimeterBlock_log,"caloBlock",experimentalHall_log,false,0);
131 
132  //------------------------------ calorimeter layers
133 
134  G4double calo_x = 1.*cm;
135  G4double calo_y = 40.*cm;
136  G4double calo_z = 40.*cm;
137  G4Box* calorimeterLayer_box = new G4Box("caloLayer_box",
138  calo_x,calo_y,calo_z);
139  calorimeterLayer_log = new G4LogicalVolume(calorimeterLayer_box,
140  Al,"caloLayer_log",0,0,0);
141  for(G4int i=0;i<19;i++) // loop for 19 layers
142  {
143  G4double caloPos_x = (i-9)*10.*cm;
144  G4double caloPos_y = 0.0*m;
145  G4double caloPos_z = 0.0*m;
146  calorimeterLayer_phys = new G4PVPlacement(0,
147  G4ThreeVector(caloPos_x,caloPos_y,caloPos_z),
148  calorimeterLayer_log,"caloLayer",calorimeterBlock_log,false,i);
149  }
150 
151  //------------------------------------------------------------------
152 
153  return experimentalHall_phys;
154 }
155