BGO Shape + BGO Window

CloverDetectorConstruction.cc

@@ -10,6 +10,7 @@
 #include "G4Tubs.hh"
 #include "G4Sphere.hh"
 #include "G4Trd.hh"
+#include "G4UnionSolid.hh"
 #include "G4IntersectionSolid.hh"
 #include "G4SubtractionSolid.hh"
 
@@ -99,7 +100,7 @@ G4VPhysicalVolume* CloverDetectorConstruction::DefineVolumes()
   // Geometry parameters
   G4double crystalLength = 8.*cm;
   G4double crystalRadius = 25.*mm;
-  G4double crystalZPos = Radius; //14.*cm + crystalLength/2.;
+  G4double crystalZPos = Radius*mm + crystalLength/2.; //distance to target + distance to center of crystals.;
   G4double cutXY = 46.0 * mm;
 
   G4double worldSizeZ  = 2*(crystalLength + crystalZPos);
@@ -131,9 +132,14 @@ G4VPhysicalVolume* CloverDetectorConstruction::DefineVolumes()
   G4double bgoXYInner = 10*mm + 2*(cutXY + 1.0) * mm;
   G4double bgoZInner  = crystalLength/2 + 4 * mm + crystalLength + 15*mm;
   G4double bgoXYWallThickness = 103.5 * mm; //from schematic
-  G4double bgoanglecut = 53 * mm;
+  G4double bgoanglecut0 = 53 * mm ;
+  G4double zbgo0 = 178 * mm;
   
+  G4double bgoanglecut1 = 24.935 * mm;
+  G4double zbgo1 = 80*mm;
 
+  G4double bgoanglecut2 = 10 *mm ;
+  G4double zbgo2 = 20*mm;
   
   // Get materials
   auto backgroundMaterial = G4Material::GetMaterial("G4_AIR");
@@ -193,13 +199,28 @@ G4VPhysicalVolume* CloverDetectorConstruction::DefineVolumes()
   G4Box* case2 = new G4Box("case2", (caseXYInner + caseXYWallThickness)/2. , (caseXYInner + caseXYWallThickness)/2., caseZInner + caseZWallThickness*2.);
   G4SubtractionSolid * casing = new G4SubtractionSolid("casing", case2, case1);
   
-  G4Box* bgo1 = new G4Box("bgo1", bgoXYInner/2., bgoXYInner/2., bgoZInner +10*mm);
+  G4Box* bgo1 = new G4Box("bgo1", bgoXYInner/2., bgoXYInner/2., bgoZInner +zbgo1);
  
-  G4Trd* bgo2 = new G4Trd("bgo2", (bgoXYInner+ bgoXYWallThickness)/2.  - bgoanglecut ,(bgoXYInner+ bgoXYWallThickness)/2.
+  G4Trd* bgo2 = new G4Trd("bgo2", (bgoXYInner+ bgoXYWallThickness)/2.  - bgoanglecut1 ,(bgoXYInner+ bgoXYWallThickness)/2.
-                                , (bgoXYInner + bgoXYWallThickness)/2. - bgoanglecut, (bgoXYInner + bgoXYWallThickness)/2., bgoZInner);
+                                , (bgoXYInner + bgoXYWallThickness)/2. - bgoanglecut1, (bgoXYInner + bgoXYWallThickness)/2., zbgo0/2);
+    
+  G4Trd* bgo3 = new G4Trd("bgo3", (bgoXYInner+ bgoXYWallThickness)/2.  - bgoanglecut0 + bgoanglecut2,(bgoXYInner+ bgoXYWallThickness)/2. - bgoanglecut1
+                                , (bgoXYInner + bgoXYWallThickness)/2. - bgoanglecut0 + bgoanglecut2, (bgoXYInner + bgoXYWallThickness)/2.- bgoanglecut1, zbgo1/2);
+  G4ThreeVector bgo3_v = G4ThreeVector(0.,0.,-zbgo0 + 50*mm);  
+   
+  G4RotationMatrix * bgo3_m = new G4RotationMatrix(); 
+
+
+  G4VSolid* bgo_u = new G4UnionSolid("bgo2 + bgo3",bgo2,bgo3,bgo3_m,bgo3_v);
   //G4Box* bgo2 = new G4Box("bgo2", (bgoXYInner+ bgoXYWallThickness)/2., (bgoXYInner + bgoXYWallThickness)/2., bgoZInner + bgoZWallThickness*2.);
 
-  G4SubtractionSolid * bgo = new G4SubtractionSolid("bgo", bgo2, bgo1);
+ 
+  G4Trd* bgowindow = new G4Trd("bgowindow", (bgoXYInner+ bgoXYWallThickness)/2.  - bgoanglecut0 ,(bgoXYInner+ bgoXYWallThickness)/2. - bgoanglecut0 +bgoanglecut2
+                                , (bgoXYInner + bgoXYWallThickness)/2. - bgoanglecut0, (bgoXYInner + bgoXYWallThickness)/2. -bgoanglecut0 +bgoanglecut2, zbgo2/2);
+
+
+
+  G4SubtractionSolid * bgo = new G4SubtractionSolid("bgo", bgo_u, bgo1);
  
   // creating the subtraction solid that will form the actual bgo sheild.
 
@@ -223,6 +244,7 @@ G4VPhysicalVolume* CloverDetectorConstruction::DefineVolumes()
 
     auto caseLV =  new G4LogicalVolume * [fNumOfCrystal/4];
     auto bgoLV  =  new G4LogicalVolume * [fNumOfCrystal/4];
+    auto bgowindowLV  =  new G4LogicalVolume * [fNumOfCrystal/4];
 
     fLogicCrystal[i]->SetVisAttributes(crystalVisAtt);
 
@@ -243,12 +265,15 @@ G4VPhysicalVolume* CloverDetectorConstruction::DefineVolumes()
 //    if(iClover != DetNum){return 0;}
 
 
-    G4ThreeVector case_pos = G4ThreeVector(0,0,60*mm+crystalZPos + zmod); //The crystalZpos is the radius of the detector,
+    G4ThreeVector case_pos = G4ThreeVector(0,0,88*mm+crystalZPos); //The crystalZpos is the radius of the detector,
-                                                                           //bgo uses the same position vector and rotation matrix as the case
+                                                                   //bgo uses an identical rotation matrix as the case, 
-    G4ThreeVector bgo_pos = G4ThreeVector(0,0,60*mm+crystalZPos + zmod);
+                                                                   //you can also add in zmod if you want to shift the shielding. 
+    G4ThreeVector bgo_pos = G4ThreeVector(0,0,115*mm+crystalZPos);
+    G4ThreeVector bgowindow_pos = G4ThreeVector(0,0,-63*mm + crystalZPos);
                                                                           
     //Set rotation matrix settings for clovers.
     
+    G4RotationMatrix * bgowindowmat = new G4RotationMatrix(); 
     G4RotationMatrix * bgomat = new G4RotationMatrix(); 
     G4RotationMatrix * rotmat = new G4RotationMatrix(); 
     G4RotationMatrix * crystalmat= new G4RotationMatrix();
@@ -260,6 +285,8 @@ G4VPhysicalVolume* CloverDetectorConstruction::DefineVolumes()
         if(j == iClover){
  
     // rotation matrix must undo the operations you perform with the position vector. 
+    bgowindowmat->rotateZ(-dPsi*degree);
+    bgowindowmat->rotateX(-dTheta*degree);
 
     bgomat->rotateZ(-dPsi*degree);
     bgomat->rotateX(-dTheta*degree);
@@ -275,13 +302,14 @@ G4VPhysicalVolume* CloverDetectorConstruction::DefineVolumes()
     pos.rotateX(dTheta*degree);
     pos.rotateZ(dPsi *degree);
 
-    //set rotation for the detector case vector; 
-
     case_pos.rotateX(dTheta *degree); 
     case_pos.rotateZ(dPsi*degree); 
     
     bgo_pos.rotateX(dTheta *degree); 
     bgo_pos.rotateZ(dPsi*degree); 
+    
+    bgowindow_pos.rotateX(dTheta *degree); 
+    bgowindow_pos.rotateZ(dPsi*degree); 
         }
     }
     new G4PVPlacement( crystalmat,     // orientation matrix
@@ -297,6 +325,7 @@ G4VPhysicalVolume* CloverDetectorConstruction::DefineVolumes()
   if( jCrystal  == 0 ) {  
       caseLV[iClover]  = new G4LogicalVolume(casing, G4Material::GetMaterial("G4_Al"), "Case");
       bgoLV[iClover]   = new G4LogicalVolume(bgo   , G4Material::GetMaterial("G4_Al"), "BGO ");
+      bgowindowLV[iClover]   = new G4LogicalVolume(bgowindow, G4Material::GetMaterial("G4_Al"), "BGO WINDOW ");
      
       new G4PVPlacement( rotmat ,                // case orientation
                      case_pos,          // case location
@@ -315,8 +344,19 @@ G4VPhysicalVolume* CloverDetectorConstruction::DefineVolumes()
                      false,            // no boolean operation
                      iClover,                // copy number
                      fCheckOverlaps);  // checking overlaps
+      
+      new G4PVPlacement( bgowindowmat ,      // bgo orientation
+                     bgowindow_pos,          // bgo location
+                     bgowindowLV[i/4],      // its logical volume                         
+                     "Bgowindow",         // its name
+                     worldLV,          // its mother  volume
+                     false,            // no boolean operation
+                     iClover,                // copy number
+                     fCheckOverlaps);  // checking overlaps
+                                       
   caseLV[iClover]->SetVisAttributes(new G4VisAttributes(G4Colour(1.0,1.0,0.0)));
   bgoLV[iClover]->SetVisAttributes(new G4VisAttributes(G4Colour(0.,1.0,0.0)));
+  bgowindowLV[iClover]->SetVisAttributes(new G4VisAttributes(G4Colour(0.0,1.0,1.0)));
     }
        //Set a i+1%4 for each 
      //

Detector_Parameters.hh

@@ -31,7 +31,9 @@ const double Clover_Location[Crystal_Num/4][4] = {{0,131.75,326.96,0.},
     {12,90.,51.42,0.},
     {13,48.25,180.,0.},
     {14,129.,180.,0.},
-    {15,48.25,107.35,0.}};//,
+    {15,48.25,107.35,0.}
+    
+    };//,