Simpler approach to using spectral functions. A beta version. Implements the NuclearModelI interface. More...

#include <SpectralFunc1d.h>

Inheritance diagram for genie::SpectralFunc1d:

Public Member Functions
	SpectralFunc1d ()

	SpectralFunc1d (string config)

virtual	~SpectralFunc1d ()

bool	GenerateNucleon (const Target &t) const

double	Prob (double p, double w, const Target &t) const

NuclearModel_t	ModelType (const Target &) const

void	Configure (const Registry &config)

void	Configure (string param_set)

Public Member Functions inherited from genie::NuclearModelI
virtual	~NuclearModelI ()

virtual bool	GenerateNucleon (const Target &tgt, double hitNucleonRadius) const

virtual double	Prob (double p, double w, const Target &tgt, double hitNucleonRadius) const

virtual double	FermiMomentum (const Target &, int nucleon_pdg) const

virtual double	LocalFermiMomentum (const Target &, int nucleon_pdg, double radius) const

double	RemovalEnergy (void) const

double	Momentum (void) const

const TVector3 &	Momentum3 (void) const

FermiMoverInteractionType_t	GetFermiMoverInteractionType (void) const

void	SetMomentum3 (const TVector3 &mom) const

void	SetRemovalEnergy (double E) const

Public Member Functions inherited from genie::Algorithm
virtual	~Algorithm ()

virtual void	FindConfig (void)

virtual const Registry &	GetConfig (void) const

Registry *	GetOwnedConfig (void)

virtual const AlgId &	Id (void) const
	Get algorithm ID. More...

virtual AlgStatus_t	GetStatus (void) const
	Get algorithm status. More...

virtual bool	AllowReconfig (void) const

virtual AlgCmp_t	Compare (const Algorithm *alg) const
	Compare with input algorithm. More...

virtual void	SetId (const AlgId &id)
	Set algorithm ID. More...

virtual void	SetId (string name, string config)

const Algorithm *	SubAlg (const RgKey &registry_key) const

void	AdoptConfig (void)

void	AdoptSubstructure (void)

virtual void	Print (ostream &stream) const
	Print algorithm info. More...

Protected Member Functions
void	LoadConfig (void)

Protected Member Functions inherited from genie::NuclearModelI
	NuclearModelI ()

	NuclearModelI (std::string name)

	NuclearModelI (std::string name, std::string config)

const string &	FermiMomentumTableName () const

const genie::FermiMomentumTable &	FermiMomentumTable () const

Protected Member Functions inherited from genie::Algorithm
	Algorithm ()

	Algorithm (string name)

	Algorithm (string name, string config)

void	Initialize (void)

void	DeleteConfig (void)

void	DeleteSubstructure (void)

Registry *	ExtractLocalConfig (const Registry &in) const

Registry *	ExtractLowerConfig (const Registry &in, const string &alg_key) const
	Split an incoming configuration Registry into a block valid for the sub-algo identified by alg_key. More...

template<class T >
bool	GetParam (const RgKey &name, T &p, bool is_top_call=true) const

template<class T >
bool	GetParamDef (const RgKey &name, T &p, const T &def) const

template<class T >
int	GetParamVect (const std::string &comm_name, std::vector< T > &v, bool is_top_call=true) const
	Handle to load vectors of parameters. More...

int	GetParamVectKeys (const std::string &comm_name, std::vector< RgKey > &k, bool is_top_call=true) const

int	AddTopRegistry (Registry *rp, bool owns=true)
	add registry with top priority, also update ownership More...

int	AddLowRegistry (Registry *rp, bool owns=true)
	add registry with lowest priority, also update ownership More...

int	MergeTopRegistry (const Registry &r)

int	AddTopRegisties (const vector< Registry * > &rs, bool owns=false)
	Add registries with top priority, also udated Ownerships. More...

Private Member Functions
void	CleanUp (void)

Private Attributes
bool	fUseRFGRemovalE

bool	fUseRFGMomentumCutoff

double	fPCutOff

map< int, Spline * >	fSFk
	All available spectral funcs integrated over removal energy. More...

map< int, Spline * >	fSFw
	Average nucleon removal as a function of pF - computed from the spectral function. More...

map< int, double >	fNucRmvE
	Removal energies as used in FG model. More...

map< int, double >	fMaxProb
	Max SF(k) probability used in rejection method. More...

Additional Inherited Members
Static Public Member Functions inherited from genie::Algorithm
static string	BuildParamVectKey (const std::string &comm_name, unsigned int i)

static string	BuildParamVectSizeKey (const std::string &comm_name)

Protected Attributes inherited from genie::NuclearModelI
double	fCurrRemovalEnergy

TVector3	fCurrMomentum

FermiMoverInteractionType_t	fFermiMoverInteractionType

Protected Attributes inherited from genie::Algorithm
bool	fAllowReconfig

bool	fOwnsSubstruc
	true if it owns its substructure (sub-algs,...) More...

AlgId	fID
	algorithm name and configuration set More...

vector< Registry * >	fConfVect

vector< bool >	fOwnerships
	ownership for every registry in fConfVect More...

AlgStatus_t	fStatus
	algorithm execution status More...

AlgMap *	fOwnedSubAlgMp
	local pool for owned sub-algs (taken out of the factory pool) More...

Detailed Description

Simpler approach to using spectral functions. A beta version. Implements the NuclearModelI interface.

Author: Costas Andreopoulos <constantinos.andreopoulos cern.ch> University of Liverpool & STFC Rutherford Appleton Laboratory

October 09, 2004

Definition at line 35 of file SpectralFunc1d.h.

Constructor & Destructor Documentation

SpectralFunc1d::SpectralFunc1d ( )

Definition at line 40 of file SpectralFunc1d.cxx.

                                :
 NuclearModelI("genie::SpectralFunc1d")
 {
 
 }

SpectralFunc1d::SpectralFunc1d ( string config )

Definition at line 46 of file SpectralFunc1d.cxx.

                                             :
 NuclearModelI("genie::SpectralFunc1d", config)
 {
 
 }

SpectralFunc1d::~SpectralFunc1d ( )

virtual

Definition at line 52 of file SpectralFunc1d.cxx.

 {
   this->CleanUp();
 }

Member Function Documentation

void SpectralFunc1d::CleanUp ( void )

private

Definition at line 238 of file SpectralFunc1d.cxx.

 {
   map<int, Spline*>::iterator spliter;
 
   for(spliter = fSFk.begin(); spliter != fSFk.end(); ++spliter) {
     Spline * spl = spliter->second;
     if(spl) delete spl;
   }
   for(spliter = fSFw.begin(); spliter != fSFw.end(); ++spliter) {
     Spline * spl = spliter->second;
     if(spl) delete spl;
   }
   fSFk.clear();
   fSFw.clear();
   fNucRmvE.clear();
   fMaxProb.clear();
 }

void SpectralFunc1d::Configure ( const Registry & config )

virtual

Configure the algorithm with an external registry The registry is merged with the top level registry if it is owned, Otherwise a copy of it is added with the highest priority

Reimplemented from genie::Algorithm.

Definition at line 145 of file SpectralFunc1d.cxx.

 {
   Algorithm::Configure(config);
   this->LoadConfig();
 }

void SpectralFunc1d::Configure ( string config )

virtual

Configure the algorithm from the AlgoConfigPool based on param_set string given in input An algorithm contains a vector of registries coming from different xml configuration files, which are loaded according a very precise prioriy This methods will load a number registries in order of priority: 1) "Tunable" parameter set from CommonParametes. This is loaded with the highest prioriry and it is designed to be used for tuning procedure Usage not expected from the user. 2) For every string defined in "CommonParame" the corresponding parameter set will be loaded from CommonParameter.xml 3) parameter set specified by the config string and defined in the xml file of the algorithm 4) if config is not "Default" also the Default parameter set from the same xml file will be loaded Effectively this avoids the repetion of a parameter when it is not changed in the requested configuration

Reimplemented from genie::Algorithm.

Definition at line 151 of file SpectralFunc1d.cxx.

 {
   Algorithm::Configure(param_set);
   this->LoadConfig();
 }

bool SpectralFunc1d::GenerateNucleon ( const Target & t ) const

virtual

Implements genie::NuclearModelI.

Definition at line 57 of file SpectralFunc1d.cxx.

 {
   RandomGen * rnd = RandomGen::Instance();
   int Z = target.Z();
 
   map<int, double>::const_iterator  dbl_it;
   map<int, Spline*>::const_iterator spl_it;
 
   // Select fermi momentum from the integrated (over removal energies) s/f.
   //
   spl_it = fSFk.find(Z);
   dbl_it = fMaxProb.find(Z);
   if(spl_it == fSFk.end() || dbl_it == fMaxProb.end()) {
     fCurrRemovalEnergy = 0.;
     fCurrMomentum.SetXYZ(0.,0.,0.);
     return false;
   }
 
   double prob_max = dbl_it->second;
   LOG("SpectralFunc1", pDEBUG) << "Max probability = " << prob_max;
 
   double p = 0;
   unsigned int niter = 0;
   while(1) {
     if(niter > kRjMaxIterations) {
        LOG("SpectralFunc1", pWARN)
         << "Couldn't generate a hit nucleon after " << niter << " iterations";
        return false;
     }
     niter++;
 
     if(fUseRFGMomentumCutoff) p = fPCutOff * rnd->RndGen().Rndm();
     else p = rnd->RndGen().Rndm();
 
     double prob  = spl_it->second->Evaluate(p);
     double probg = prob_max * rnd->RndGen().Rndm();
     LOG("SpectralFunc1", pDEBUG) << "Trying p = " << p << " / prob = " << prob;
 
     bool accept = (probg<prob);
     if(accept) break;
   }
 
   LOG("SpectralFunc1", pINFO) << "|p,nucleon| = " << p;
 
   double costheta = -1. + 2. * rnd->RndGen().Rndm();
   double sintheta = TMath::Sqrt(1.-costheta*costheta);
   double fi       = 2 * kPi * rnd->RndGen().Rndm();
   double cosfi    = TMath::Cos(fi);
   double sinfi    = TMath::Sin(fi);
 
   double px = p*sintheta*cosfi;
   double py = p*sintheta*sinfi;
   double pz = p*costheta;
 
   fCurrMomentum.SetXYZ(px,py,pz);
 
   // Set removal energy
   // Do it either in the same way as in the FG model or by using the average
   // removal energy for the seleced pF as calculated from the s/f itself
   //
   if(fUseRFGRemovalE) {
     dbl_it = fNucRmvE.find(Z);
     if(dbl_it != fNucRmvE.end()) fCurrRemovalEnergy = dbl_it->second;
     else fCurrRemovalEnergy = nuclear::BindEnergyPerNucleon(target);
   } else {
     spl_it = fSFw.find(Z);
     if(spl_it==fSFw.end()) {
        fCurrRemovalEnergy = 0.;
        fCurrMomentum.SetXYZ(0.,0.,0.);
        return false;
     } else fCurrRemovalEnergy = spl_it->second->Evaluate(p);
   }
 
   return true;
 }

void SpectralFunc1d::LoadConfig ( void )

protectedvirtual

Reimplemented from genie::NuclearModelI.

Definition at line 157 of file SpectralFunc1d.cxx.

 {
   
   NuclearModelI::LoadConfig() ; 
 
   LOG("SpectralFunc1", pDEBUG) << "Loading coonfiguration for SpectralFunc1d";
 
   this->CleanUp();
 
   // Load spectral function data.
   // Hopefully analytical expressions will be available soon.
   // Currently I have spectral functions for C12 and Fe56 only.
   //
   string data_dir =
       string(gSystem->Getenv("GENIE")) + string("/data/evgen/nucl/spectral_functions/");
 
   string c12_sf1dk_file  = data_dir + "benhar-sf1dk-12c.data";
   string fe56_sf1dk_file = data_dir + "benhar-sf1dk-56fe.data";
   string c12_sf1dw_file  = data_dir + "benhar-sf1dw-12c.data";
   string fe56_sf1dw_file = data_dir + "benhar-sf1dw-56fe.data";
 
   Spline * spl = 0;
 
   spl = new Spline(c12_sf1dk_file);
   fSFk.insert(map<int, Spline*>::value_type(6,spl));
   spl = new Spline(fe56_sf1dk_file);
   fSFk.insert(map<int, Spline*>::value_type(26,spl));
 
   spl = new Spline(c12_sf1dw_file);
   fSFw.insert(map<int, Spline*>::value_type(6,spl));
   spl = new Spline(fe56_sf1dw_file);
   fSFw.insert(map<int, Spline*>::value_type(26,spl));
 
   // scan for max.
   map<int, Spline*>::const_iterator spliter;
   int    n    = 100;
   double pmin =  0.000;
   double dp   =  0.010;
   for(spliter = fSFk.begin(); spliter != fSFk.end(); ++spliter) {
     double prob_max = 0;
     int Z = spliter->first;
     spl = spliter->second;
     for(int i=0; i<n; i++) {
        double p = pmin + i*dp;
        prob_max = TMath::Max(prob_max, spl->Evaluate(p));
     }
     fMaxProb.insert(map<int,double>::value_type(Z,prob_max));
   }
 
   // Check whether to use the same removal energies as in the FG model or
   // to use the average removal energy for the selected fermi momentum
   // (computed from the spectral function itself)
   GetParam( "UseRFGRemovalE", fUseRFGRemovalE ) ;
 
   // Check whether to use the same momentum cutoff as in the FG model
   GetParam("UseRFGMomentumCutoff", fUseRFGMomentumCutoff ) ;
 
   //Get the momentum cutoff
   GetParam( "RFG-MomentumCutOff", fPCutOff ) ;
 
   // Removal energies as used in the FG model
   // Load removal energy for specific nuclei from either the algorithm's
   // configuration file or the UserPhysicsOptions file.
   // If none is used use Wapstra's semi-empirical formula.
   for(int Z=1; Z<140; Z++) {
     for(int A=Z; A<3*Z; A++) {
       ostringstream key;
       int pdgc = pdg::IonPdgCode(A,Z);
       key   << "RFG-NucRemovalE@Pdg="     << pdgc;
       RgKey rgkey   = key.str();
       double eb ;
       if ( GetParam( rgkey, eb, false ) ) {
         eb = TMath::Max(eb, 0.);
         LOG("BodekRitchie", pNOTICE)
           << "Nucleus: " << pdgc << " -> using Eb =  " << eb << " GeV";
         fNucRmvE.insert(map<int,double>::value_type(Z,eb));
       }
     }
   }
 }

NuclearModel_t genie::SpectralFunc1d::ModelType ( const Target & ) const

inlinevirtual

is not really a spectral func model, just a FG model with different momentum distribution

Implements genie::NuclearModelI.

Definition at line 48 of file SpectralFunc1d.h.

   {
     return kNucmFermiGas; /// is not really a spectral func model, just a FG model with different momentum distribution
   }

double SpectralFunc1d::Prob	(	double	p,
		double	w,
		const Target &	t
	)		const

virtual

Implements genie::NuclearModelI.

Definition at line 133 of file SpectralFunc1d.cxx.

 {
   if(fUseRFGMomentumCutoff) { if(p > fPCutOff) return 0; }
 
   int Z = target.Z();
   map<int, Spline*>::const_iterator spl_it = fSFk.find(Z);
 
   if(spl_it == fSFk.end()) return 0;
   else return TMath::Max(0.,spl_it->second->Evaluate(p));
 }

Member Data Documentation

map<int, double> genie::SpectralFunc1d::fMaxProb

private

Max SF(k) probability used in rejection method.

Definition at line 74 of file SpectralFunc1d.h.

map<int, double> genie::SpectralFunc1d::fNucRmvE

private

Removal energies as used in FG model.

Definition at line 73 of file SpectralFunc1d.h.

double genie::SpectralFunc1d::fPCutOff

private

Definition at line 70 of file SpectralFunc1d.h.

map<int, Spline *> genie::SpectralFunc1d::fSFk

private

All available spectral funcs integrated over removal energy.

Definition at line 71 of file SpectralFunc1d.h.

map<int, Spline *> genie::SpectralFunc1d::fSFw

private

Average nucleon removal as a function of pF - computed from the spectral function.

Definition at line 72 of file SpectralFunc1d.h.

bool genie::SpectralFunc1d::fUseRFGMomentumCutoff

private

Definition at line 69 of file SpectralFunc1d.h.

bool genie::SpectralFunc1d::fUseRFGRemovalE

private

Definition at line 68 of file SpectralFunc1d.h.

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

Generator/src/Physics/NuclearState/SpectralFunc1d.h
Generator/src/Physics/NuclearState/SpectralFunc1d.cxx

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation