JMARKOV::JCombinedScattering Class Reference

Implementation of the JScatteringModel interface with that combines two scattering models into one effective model. More...

#include <JScatteringModel.hh>

Inheritance diagram for JMARKOV::JCombinedScattering:

Public Member Functions
	JCombinedScattering (JScatteringModel *_sm1, JScatteringModel *_sm2)
	Constructor. More...
virtual double	getScatteringLength ()
double	getScatteringProbability (double ct)
	Return the probability density as a function of cos(theta) More...
JVersor3D	generateDirection ()
	Return a randomly generated direction according to the scattering probability distribution. More...

Protected Attributes
double	a
JScatteringModel *	sm1
JScatteringModel *	sm2
double	lambda_scat

Detailed Description

Implementation of the JScatteringModel interface with that combines two scattering models into one effective model.

Definition at line 520 of file JScatteringModel.hh.

Constructor & Destructor Documentation

JMARKOV::JCombinedScattering::JCombinedScattering ( JScatteringModel *  _sm1, JScatteringModel *  _sm2  )

inline

Constructor.

Note that this only copies only the pointers to the JScatteringModel instances. So if _sm1 or _sm2 are deleted or changed, it will also affect the behaviour of this instance.

Definition at line 531 of file JScatteringModel.hh.

: sm1(_sm1), sm2(_sm2) { }

Member Function Documentation

virtual double JMARKOV::JCombinedScattering::getScatteringLength ( )

inlinevirtual

Reimplemented from JMARKOV::JScatteringModel.

Definition at line 533 of file JScatteringModel.hh.

                                         {
      // calculate effective scattering length
      double l1 = sm1->getScatteringLength() ;
      double l2 = sm2->getScatteringLength() ;
      return 1.0 / ( 1.0/l1 + 1.0/l2 ) ;
    }

double JMARKOV::JCombinedScattering::getScatteringProbability ( double  ct )

inlinevirtual

Return the probability density as a function of cos(theta)

dP / dOmega = dP / dcosTheta dPhi

to scatter in a given direction. Theta=0 is forward scattering.

Implements JMARKOV::JScatteringModel.

Definition at line 540 of file JScatteringModel.hh.

                                                 {
      double val1 = sm1->getScatteringProbability(ct) ;
      double val2 = sm2->getScatteringProbability(ct) ;
      double l1 = sm1->getScatteringLength() ;
      double l2 = sm2->getScatteringLength() ;
      double lambda = getScatteringLength() ; 
      // effective scattering probability
      return lambda * ( val1/l1 + val2/l2 ) ;
    }

JVersor3D JMARKOV::JCombinedScattering::generateDirection ( )

inlinevirtual

Return a randomly generated direction according to the scattering probability distribution.

This uses gRandom.

Implements JMARKOV::JScatteringModel.

Definition at line 550 of file JScatteringModel.hh.

                                  {
      double l1 = sm1->getScatteringLength() ;
      double l2 = sm2->getScatteringLength() ;
      // probability to scatter with process 1
      double P = l2/(l1+l2) ; 
      if( gRandom->Uniform(0,1)<P ) {
        return sm1->generateDirection() ;
      } else { 
        return sm2->generateDirection() ;
      }
    }

Member Data Documentation

double JMARKOV::JCombinedScattering::a

protected

Definition at line 564 of file JScatteringModel.hh.

JScatteringModel* JMARKOV::JCombinedScattering::sm1

protected

Definition at line 565 of file JScatteringModel.hh.

JScatteringModel* JMARKOV::JCombinedScattering::sm2

protected

Definition at line 566 of file JScatteringModel.hh.

double JMARKOV::JScatteringModel::lambda_scat

protectedinherited

Definition at line 77 of file JScatteringModel.hh.

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The documentation for this class was generated from the following file:

• JScatteringModel.hh