Gabriele Cosmo
156 lines
5.6 KiB
C++
156 lines
5.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// --------------------------------------------------------------
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// GEANT 4 - ULTRA experiment example
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// --------------------------------------------------------------
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//
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// Code developed by:
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// B. Tome, M.C. Espirito-Santo, A. Trindade, P. Rodrigues
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//
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// ****************************************************
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// * UltraFresnelLens.cc
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// ****************************************************
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//
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// Class for definition of the Ultra Fresnel Lens.
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// An UltraFresnelLens object is created in the UltraDetectorConstruction class.
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// This class makes use of the UltraFresnelLensParameterisation class.
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// The lens profile is define through the GetSagita method.
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//
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#include <cmath>
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#include "UltraFresnelLens.hh"
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#include "UltraFresnelLensParameterisation.hh"
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#include "G4Material.hh"
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#include "G4MaterialTable.hh"
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#include "G4Tubs.hh"
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#include "G4Cons.hh"
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#include "G4LogicalVolume.hh"
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#include "G4PVPlacement.hh"
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#include "G4PVParameterised.hh"
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#include "G4ThreeVector.hh"
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#include "G4VisAttributes.hh"
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UltraFresnelLens::UltraFresnelLens( G4double Diameter, G4int nGrooves, G4Material* Material, G4VPhysicalVolume * MotherPV, G4ThreeVector Pos)
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{
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LensMaterial = Material ;
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LensDiameter = Diameter ;
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NumberOfGrooves = nGrooves;
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GrooveWidth = (Diameter/2.0)/nGrooves ;
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LensPosition = Pos ;
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if( GrooveWidth <= 0 ){
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G4Exception("UltraFresnelLens constructor: GrooveWidth<=0");
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}
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G4double Rmin1 = (NumberOfGrooves-1)*(GrooveWidth) ;
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G4double Rmax1 = (NumberOfGrooves-0)*(GrooveWidth) ;
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LensThickness = GetSagita(Rmax1)-GetSagita(Rmin1) ; // Height of the highest groove
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BuildLens(MotherPV) ;
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}
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UltraFresnelLens::~UltraFresnelLens( )
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{;}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void UltraFresnelLens::BuildLens(G4VPhysicalVolume *MotherPV){
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G4double StartPhi = 0.0 ;
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G4double DeltaPhi = twopi ;
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G4double LensMotherDz = LensThickness ;
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G4Tubs *LensMotherCylinder
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= new G4Tubs("LensMotherCylinder",0.0*mm,LensDiameter/2.0,LensMotherDz/2.0,StartPhi,DeltaPhi);
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G4Material *LensMotherMaterial = MotherPV->GetLogicalVolume()->GetMaterial() ;
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G4LogicalVolume *LensMotherLV
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= new G4LogicalVolume(LensMotherCylinder,LensMotherMaterial,"LensMotherLV",0,0,0);
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G4VPhysicalVolume *LensMotherPV
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= new G4PVPlacement(0,LensPosition,"LensMotherPV",LensMotherLV,MotherPV,false,0);
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LensMotherLV->SetVisAttributes (G4VisAttributes::Invisible);
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G4Cons *solidGroove
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= new G4Cons("Groove",40.0*mm,50.0*mm,40.0*mm,40.001*mm,1.0*mm,StartPhi,DeltaPhi);
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G4LogicalVolume *logicalGroove
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= new G4LogicalVolume(solidGroove,LensMaterial,"Groove_log",0,0,0);
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G4VPVParameterisation *FresnelLensParam = new UltraFresnelLensParameterisation(this);
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LensPhysicalVolume =
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new G4PVParameterised("LensPV",logicalGroove,LensMotherPV,kZAxis,NumberOfGrooves,FresnelLensParam) ;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4double UltraFresnelLens::GetSagita(G4double radius)
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{
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G4double Conic = -1.0;
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G4double Curvature = 0.00437636761488/mm ;
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G4double Aspher[8] = { 4.206739256e-05/(mm),
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9.6440152e-10/(mm3),
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-1.4884317e-15/(mm2*mm3),
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0.0/(mm*mm3*mm3),
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0.0/(mm3*mm3*mm3),
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0.0/(mm2*mm3*mm3*mm3),
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0.0/(mm*mm3*mm3*mm3*mm3),
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0.0/(mm*3*mm3*mm3*mm3*mm3)
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};
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G4double TotAspher = 0.0*mm ;
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for(G4int k=1;k<9;k++){
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TotAspher += Aspher[k-1]*std::pow(radius,2*k) ;
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}
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G4double ArgSqrt = 1.0-(1.0+Conic)*std::pow(Curvature,2)*std::pow(radius,2) ;
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if (ArgSqrt < 0.0){
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G4Exception("UltraFresnelLensParameterisation::Sagita: Square Root of <0 !");
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}
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G4double Sagita_value = Curvature*std::pow(radius,2)/(1.0+std::sqrt(ArgSqrt)) + TotAspher;
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return Sagita_value ;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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