Gabriele Cosmo
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
//
|
|
// ********************************************************************
|
|
// * DISCLAIMER *
|
|
// * *
|
|
// * The following disclaimer summarizes all the specific disclaimers *
|
|
// * of contributors to this software. The specific disclaimers,which *
|
|
// * govern, are listed with their locations in: *
|
|
// * http://cern.ch/geant4/license *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. *
|
|
// * *
|
|
// * This code implementation is the intellectual property of the *
|
|
// * GEANT4 collaboration. *
|
|
// * By copying, distributing or modifying the Program (or any work *
|
|
// * based on the Program) you indicate your acceptance of this *
|
|
// * statement, and all its terms. *
|
|
// ********************************************************************
|
|
//
|
|
//
|
|
// $Id: G4PlateIrrGasXTRdEdx.cc,v 1.2 2004/12/07 09:00:05 gcosmo Exp $
|
|
// GEANT4 tag $Name: geant4-07-01 $
|
|
//
|
|
|
|
#include <complex>
|
|
|
|
#include "G4PlateIrrGasXTRdEdx.hh"
|
|
#include "Randomize.hh"
|
|
|
|
#include "G4Gamma.hh"
|
|
|
|
////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Constructor, destructor
|
|
|
|
G4PlateIrrGasXTRdEdx::G4PlateIrrGasXTRdEdx(G4Envelope *anEnvelope,
|
|
G4double a, G4double b) :
|
|
G4VXTRdEdx(anEnvelope,a,b)
|
|
{
|
|
G4cout<<"PlateIrrGas X-ray TR radiator model is called"<<G4endl ;
|
|
|
|
// Build energy and angular integral spectra of X-ray TR photons from
|
|
// a radiator
|
|
|
|
BuildTable() ;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
G4PlateIrrGasXTRdEdx::~G4PlateIrrGasXTRdEdx()
|
|
{
|
|
;
|
|
}
|
|
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Approximation for radiator interference factor for the case of
|
|
// fully PlateIrrGas radiator. The plate thickness is fixed .
|
|
// The mean values of gas gap thicknesses
|
|
// are supposed to be about XTR formation zones but much less than
|
|
// mean absorption length of XTR photons in coresponding material.
|
|
|
|
G4double
|
|
G4PlateIrrGasXTRdEdx::GetStackFactor( G4double energy,
|
|
G4double gamma, G4double varAngle )
|
|
{
|
|
G4double result, Za, Ma ;
|
|
|
|
Za = GetPlateFormationZone(energy,gamma,varAngle) ;
|
|
Ma = GetPlateLinearPhotoAbs(energy) ;
|
|
|
|
|
|
|
|
|
|
|
|
// G4complex Ca(1.0+0.5*fPlateThick*Ma,fPlateThick/Za) ;
|
|
|
|
G4complex Ha( std::exp(-0.5*fPlateThick*Ma)*std::cos(fPlateThick/Za),
|
|
-std::exp(-0.5*fPlateThick*Ma)*std::sin(fPlateThick/Za) ) ;
|
|
|
|
|
|
G4complex R = (1.0 - Ha) ;
|
|
|
|
R *= G4double(fPlateNumber)*OneInterfaceXTRdEdx(energy,gamma,varAngle) ;
|
|
|
|
result = 2.0*std::real(R) ;
|
|
|
|
|
|
return result ;
|
|
}
|
|
|
|
|
|
//
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////
|