LH2 target

Detector Material and Construction

Using GEANT4, the ExampleN02 file was edited to run for a NH3 target. The file ExN02DetectorConstruction.cc was edited with

//--------- Material definition ---------
  
  G4double a, z;
  G4double density, temperature, pressure;

//Liquid Hydrogen
G4Material* LH2 = new G4Material("Hydrogen", z=2., a=2.02*g/mole,  density=0.07*g/cm3, kStateGas,3*kelvin,1.7e5*pascal);

The target is a cylinder with a 1.5 cm diameter and 1 cm thickness following dimensions listed on page 8 of File:PHY02-33.pdf

//--------- Sizes of the principal geometrical components (solids)  ---------

  NbOfChambers = 1;
  ChamberWidth = 1.5*cm;
  ChamberSpacing = 40*cm;
  
  fTrackerLength = (NbOfChambers+1)*ChamberSpacing; // Full length of Tracker
  fTargetLength  = 1.0 * cm;                        // Full length of Target

  TargetMater = NH3;
  ChamberMater = BadVacuum;
  
  
  //fWorldLength= 1.2 *(fTargetLength+fTrackerLength);
  fWorldLength= 1.2 *(10+fTrackerLength)+100 *cm;
  
  G4double targetSize  = 0.5*fTargetLength;    // Half length of the Target
  G4double trackerSize = 0.5*fTrackerLength;   // Half length of the Tracker