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#include <G4NistManager.hh>
#include <G4Material.hh>
#include <G4LogicalVolume.hh>
#include <G4PVPlacement.hh>
#include <G4Box.hh>
#include <G4VisAttributes.hh>
#include <G4UserLimits.hh>
#include "G4BeamTestDetectorConstruction.h"
#include "G4BeamTestTank.h"
G4BeamTestDetectorConstruction::G4BeamTestDetectorConstruction():
origin_(NAN, NAN, NAN), verboseLevel_(0)/* , tankList_(0) */
{
}
G4BeamTestDetectorConstruction::~G4BeamTestDetectorConstruction()
{
}
G4VPhysicalVolume* G4BeamTestDetectorConstruction::Construct()
{
/* if(tankList_.empty()) return NULL; */
CreateMaterials();
// Determine bottom z position of snow volume
G4double zSnowBottom(tankList_.at(0)->GetPos().z());
BOOST_FOREACH(G4BeamTestTank* tank, tankList_)
{
// z position of bottom of tank
G4double z = tank->GetPos().z() - 0.5*tank->GetTankHeight_G4();
zSnowBottom = std::min(z, zSnowBottom);
}
// Subtract safety margin
zSnowBottom -= 1.0*CLHEP::m;
// Triangulate snow surface
G4Delaunay delaunay;
BOOST_FOREACH(G4BeamTestTank* tank, tankList_)
{
// z position of snow surface
G4double z = tank->GetPos().z() + 0.5 * tank->GetTankHeight_G4() + tank->GetSnowHeight_G4();
delaunay.AddPoint(tank->GetDelaunayPoint1().x(),
tank->GetDelaunayPoint1().y(),
z - zSnowBottom);
delaunay.AddPoint(tank->GetDelaunayPoint2().x(),
tank->GetDelaunayPoint2().y(),
z - zSnowBottom);
delaunay.AddPoint(tank->GetDelaunayPoint3().x(),
tank->GetDelaunayPoint3().y(),
z - zSnowBottom);
}
// Create tesselated snow volume
G4TessellatedSolid* solidSnow = new G4TessellatedSolid("solid_snow");
delaunay.BuildSolid(solidSnow, 50.0*CLHEP::m, 100.0*CLHEP::m);
// Determine World dimensions
G4double xHalfLength = 0.5 * (delaunay.GetXmax() - delaunay.GetXmin());
G4double yHalfLength = 0.5 * (delaunay.GetYmax() - delaunay.GetYmin());
G4double zHalfLength = 0.5 * (delaunay.GetZmax() + 20.0 * CLHEP::m); // 20 m of atmosphere
// World origin in IceCube coordinates
origin_.set(delaunay.GetOrigin().x(), delaunay.GetOrigin().y(), zSnowBottom + zHalfLength);
// Create world volume
G4Box* world_box = new G4Box("solid_world", xHalfLength, yHalfLength, zHalfLength);
G4LogicalVolume* worldLog =
new G4LogicalVolume(world_box, G4Material::GetMaterial("Air"), "log_world", 0, 0, 0);
G4VPhysicalVolume* worldPhys =
new G4PVPlacement(0, G4ThreeVector(), worldLog, "world", 0, false, 0);
// Snow layer
G4LogicalVolume* snowLog =
new G4LogicalVolume(solidSnow, G4Material::GetMaterial("Snow"), "log_snow", 0, 0, 0);
G4VPhysicalVolume* snowPhys =
new G4PVPlacement(0, G4ThreeVector(0, 0, -zHalfLength), snowLog, "snow", worldLog, false, 0);
// Instantiation of a set of visualization attributes with cyan colour
G4VisAttributes * snowVisAtt = new G4VisAttributes(G4Colour(0., 1., 1.));
// Assignment of the visualization attributes to the logical volume
snowLog->SetVisAttributes(snowVisAtt);
// Install tanks
BOOST_FOREACH(G4BeamTestTank* tank, tankList_)
{
tank->InstallTank(snowPhys, origin_);
}
// User limits (energy cutoffs)
// Do not create photons or electrons below cherenkov threshold
// See also corresponding UserSpecialCuts in Physicslist !!!!
G4UserLimits* energyLimit = new G4UserLimits();
energyLimit->SetUserMinEkine(280.0 * CLHEP::keV); // Cherenkov threshold of electrons in ice TODO(shivesh)
worldLog->SetUserLimits(energyLimit);
snowLog->SetUserLimits(energyLimit);
return worldPhys;
}
/*****************************************************************/
void G4BeamTestDetectorConstruction::CreateMaterials()
{
CreateAir();
/* CreateIce(); */
/* CreateSnow(); */
CreateWater();
CreatePlastic();
/* CreatePerlite(); */
CreateGlassSphere();
CreateEffectiveDOMMaterial();
//if(verboseLevel_>0) G4cout << *G4Material::GetMaterialTable() << G4endl;
}
/*****************************************************************/
void G4BeamTestDetectorConstruction::CreateAir()
{
G4NistManager* nistManager = G4NistManager::Instance();
nistManager->ConstructNewGasMaterial("Air","G4_AIR"/* , (273.15 - 40.0)*CLHEP::kelvin, 670.0E-3*CLHEP::bar */);
}
/*****************************************************************/
void G4BeamTestDetectorConstruction::CreateWater()
{
G4NistManager* nistManager = G4NistManager::Instance();
// G4Material* ice = new G4Material("Water", 1.0 * CLHEP::g / CLHEP::cm3, 2, kStateLiquid);
// ice->AddElement(nistManager->FindOrBuildElement("H"), 2);
// ice->AddElement(nistManager->FindOrBuildElement("O"), 1);
nistManager->ConstructNewGasMaterial("Water","G4_WATER");
}
/*****************************************************************/
void G4BeamTestDetectorConstruction::CreatePlastic()
{
G4NistManager* nistManager = G4NistManager::Instance();
/*
G4Material* plastic = new G4Material("Plastic", 1.5 * CLHEP::g / CLHEP::cm3, 3, kStateSolid);
plastic->AddElement(nistManager->FindOrBuildElement("H"), 20);
plastic->AddElement(nistManager->FindOrBuildElement("C"), 10);
plastic->AddElement(nistManager->FindOrBuildElement("O"), 5);
*/
// POM
G4Material* plastic = new G4Material("Plastic", 1.425 * CLHEP::g / CLHEP::cm3, 3, kStateSolid);
plastic->AddElement(nistManager->FindOrBuildElement("H"), 2);
plastic->AddElement(nistManager->FindOrBuildElement("C"), 1);
plastic->AddElement(nistManager->FindOrBuildElement("O"), 1);
//nistManager->FindOrBuildMaterial("G4_POLYOXYMETHYLENE");
}
/*****************************************************************/
void G4BeamTestDetectorConstruction::CreateGlassSphere()
{
// Elemental composition not exact for detailed line-up look at
// docushare collection 690 -> XRF and ICP Analysis of Pressure Sphere Glass
// 20 lbs. weight = 9072 g
// 6.5" outer radius & 0.5" thickness = 4024 cm3
G4NistManager* nistManager = G4NistManager::Instance();
G4Material* glass = new G4Material("Glass", 2.254 * CLHEP::g / CLHEP::cm3, 2, kStateSolid);
glass->AddElement(nistManager->FindOrBuildElement("Si"), 1);
glass->AddElement(nistManager->FindOrBuildElement("O"), 2);
}
/*****************************************************************/
void G4BeamTestDetectorConstruction::CreateEffectiveDOMMaterial()
{
// Mass of the a complete DOM: 12050 g
// Mass without glass sphere: 2978 g
// 6" inner glass radius: volume = 14830 cm3
G4NistManager* nistManager = G4NistManager::Instance();
G4Material* glass = new G4Material("effectiveDOM", 0.2 * CLHEP::g / CLHEP::cm3, 2, kStateSolid);
glass->AddElement(nistManager->FindOrBuildElement("Si"), 1);
glass->AddElement(nistManager->FindOrBuildElement("O"), 2);
}
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