Inheritance diagram for BetaBoostEvtVtxGenerator:

Public Member Functions
void	Alpha (double m=0)
	angle between crossing plane and horizontal plane
void	Beta (double m=0)
	BetaBoostEvtVtxGenerator (const edm::ParameterSet &p)
double	BetaFunction (double z, double z0)
	beta function
void	betastar (double m=0)
	set beta_star
void	emittance (double m=0)
	emittance (no the normalized)
CLHEP::HepRandomEngine &	getEngine ()
virtual TMatrixD *	GetInvLorentzBoost ()
virtual HepMC::FourVector *	newVertex ()
	return a new event vertex
void	Phi (double m=0)
	set half crossing angle
virtual void	produce (edm::Event &, const edm::EventSetup &)
void	sigmaZ (double s=1.0)
	set resolution in Z in cm
void	X0 (double m=0)
	set mean in X in cm
void	Y0 (double m=0)
	set mean in Y in cm
void	Z0 (double m=0)
	set mean in Z in cm
virtual	~BetaBoostEvtVtxGenerator ()
Private Member Functions
	BetaBoostEvtVtxGenerator (const BetaBoostEvtVtxGenerator &p)
BetaBoostEvtVtxGenerator &	operator= (const BetaBoostEvtVtxGenerator &rhs)
Private Attributes
double	alpha_
double	beta_
TMatrixD *	boost_
double	falpha
double	fbetastar
double	femittance
CLHEP::HepRandomEngine *	fEngine
CLHEP::RandGaussQ *	fRandom
double	fSigmaZ
double	fTimeOffset
HepMC::FourVector *	fVertex
double	fX0
double	fY0
double	fZ0
double	phi_
edm::InputTag	sourceLabel
bool	verbosity_

Detailed Description

Definition at line 50 of file BetaBoostEvtVtxGenerator.cc.

Constructor & Destructor Documentation

BetaBoostEvtVtxGenerator::BetaBoostEvtVtxGenerator ( const edm::ParameterSet & p )

Definition at line 116 of file BetaBoostEvtVtxGenerator.cc.

References alpha_, beta_, Exception, fbetastar, femittance, fEngine, fRandom, fSigmaZ, fTimeOffset, fX0, fY0, fZ0, getEngine(), edm::ParameterSet::getParameter(), edm::Service< T >::isAvailable(), and phi_.

                                                                            :
  fVertex(0), boost_(0), fTimeOffset(0), fEngine(0),
  sourceLabel(p.getParameter<edm::InputTag>("src")),
  verbosity_(p.getUntrackedParameter<bool>("verbosity",false))
{ 
  
  edm::Service<edm::RandomNumberGenerator> rng;

  if ( ! rng.isAvailable()) {
    
    throw cms::Exception("Configuration")
      << "The BaseEvtVtxGenerator requires the RandomNumberGeneratorService\n"
      "which is not present in the configuration file.  You must add the service\n"
      "in the configuration file or remove the modules that require it.";
  }

  CLHEP::HepRandomEngine& engine = rng->getEngine();
  fEngine = &engine;
  fRandom = new CLHEP::RandGaussQ(getEngine());

  fX0 =        p.getParameter<double>("X0")*cm;
  fY0 =        p.getParameter<double>("Y0")*cm;
  fZ0 =        p.getParameter<double>("Z0")*cm;
  fSigmaZ =    p.getParameter<double>("SigmaZ")*cm;
  alpha_ =     p.getParameter<double>("Alpha")*radian;
  phi_ =       p.getParameter<double>("Phi")*radian;
  fbetastar =  p.getParameter<double>("BetaStar")*cm;
  femittance = p.getParameter<double>("Emittance")*cm; // this is not the normalized emittance
  fTimeOffset = p.getParameter<double>("TimeOffset")*ns*c_light; // HepMC time units are mm
  beta_=p.getParameter<double>("Beta"); 
  if (fSigmaZ <= 0) {
    throw cms::Exception("Configuration")
      << "Error in BetaBoostEvtVtxGenerator: "
      << "Illegal resolution in Z (SigmaZ is negative)";
  }

  produces<bool>(); 
  
}

BetaBoostEvtVtxGenerator::~BetaBoostEvtVtxGenerator ( ) [virtual]

Definition at line 156 of file BetaBoostEvtVtxGenerator.cc.

References boost_, fRandom, and fVertex.

{
  delete fVertex ;
  if (boost_ != 0 ) delete boost_;
  delete fRandom; 
}

BetaBoostEvtVtxGenerator::BetaBoostEvtVtxGenerator ( const BetaBoostEvtVtxGenerator & p ) [private]

Copy constructor

Member Function Documentation

void BetaBoostEvtVtxGenerator::Alpha ( double m = 0 ) [inline]

angle between crossing plane and horizontal plane

Definition at line 75 of file BetaBoostEvtVtxGenerator.cc.

References m.

{ alpha_=m; }

void BetaBoostEvtVtxGenerator::Beta ( double m = 0 ) [inline]

Definition at line 76 of file BetaBoostEvtVtxGenerator.cc.

References m.

{ beta_=m; }

double BetaBoostEvtVtxGenerator::BetaFunction	(	double	z,
		double	z0
	)

beta function

Definition at line 196 of file BetaBoostEvtVtxGenerator.cc.

References fbetastar, femittance, and mathSSE::sqrt().

Referenced by newVertex().

{
  return sqrt(femittance*(fbetastar+(((z-z0)*(z-z0))/fbetastar)));

}

void BetaBoostEvtVtxGenerator::betastar ( double m = 0 ) [inline]

set beta_star

Definition at line 79 of file BetaBoostEvtVtxGenerator.cc.

References m.

{ fbetastar=m; }

void BetaBoostEvtVtxGenerator::emittance ( double m = 0 ) [inline]

emittance (no the normalized)

Definition at line 81 of file BetaBoostEvtVtxGenerator.cc.

References m.

{ femittance=m; }

CLHEP::HepRandomEngine & BetaBoostEvtVtxGenerator::getEngine ( )

Definition at line 163 of file BetaBoostEvtVtxGenerator.cc.

References fEngine.

Referenced by BetaBoostEvtVtxGenerator().

                                                         {
  return *fEngine;
}

TMatrixD * BetaBoostEvtVtxGenerator::GetInvLorentzBoost ( ) [virtual]

Definition at line 215 of file BetaBoostEvtVtxGenerator.cc.

References alpha_, beta_, boost_, funct::cos(), phi_, funct::sin(), mathSSE::sqrt(), funct::tan(), and verbosity_.

Referenced by produce().

                                                       {

  //alpha_ = 0;
  //phi_ = 142.e-6;
  //    if (boost_ != 0 ) return boost_;
        
  //boost_.ResizeTo(4,4);
  //boost_ = new TMatrixD(4,4);
  TMatrixD tmpboost(4,4);
  TMatrixD tmpboostZ(4,4);
  TMatrixD tmpboostXYZ(4,4);

  //if ( (alpha_ == 0) && (phi_==0) ) { boost_->Zero(); return boost_; }
        
  // Lorentz boost to frame where the collision is head-on
  // phi is the half crossing angle in the plane ZS
  // alpha is the angle to the S axis from the X axis in the XY plane
        
  tmpboost(0,0) = 1./cos(phi_);
  tmpboost(0,1) = - cos(alpha_)*sin(phi_);
  tmpboost(0,2) = - tan(phi_)*sin(phi_);
  tmpboost(0,3) = - sin(alpha_)*sin(phi_);
  tmpboost(1,0) = - cos(alpha_)*tan(phi_);
  tmpboost(1,1) = 1.;
  tmpboost(1,2) = cos(alpha_)*tan(phi_);
  tmpboost(1,3) = 0.;
  tmpboost(2,0) = 0.;
  tmpboost(2,1) = - cos(alpha_)*sin(phi_);
  tmpboost(2,2) = cos(phi_);
  tmpboost(2,3) = - sin(alpha_)*sin(phi_);
  tmpboost(3,0) = - sin(alpha_)*tan(phi_);
  tmpboost(3,1) = 0.;
  tmpboost(3,2) = sin(alpha_)*tan(phi_);
  tmpboost(3,3) = 1.;
  //cout<<"beta "<<beta_;
  double gama=1.0/sqrt(1-beta_*beta_);
  tmpboostZ(0,0)=gama;
  tmpboostZ(0,1)=0.;
  tmpboostZ(0,2)=-1.0*beta_*gama;
  tmpboostZ(0,3)=0.;
  tmpboostZ(1,0)=0.;
  tmpboostZ(1,1) = 1.;
  tmpboostZ(1,2)=0.;
  tmpboostZ(1,3)=0.;
  tmpboostZ(2,0)=-1.0*beta_*gama;
  tmpboostZ(2,1) = 0.;
  tmpboostZ(2,2)=gama;
  tmpboostZ(2,3) = 0.;
  tmpboostZ(3,0)=0.;
  tmpboostZ(3,1)=0.;
  tmpboostZ(3,2)=0.;
  tmpboostZ(3,3) = 1.;

  tmpboostXYZ=tmpboostZ*tmpboost;
  tmpboostXYZ.Invert();



  boost_ = new TMatrixD(tmpboostXYZ);
  if ( verbosity_ ) { boost_->Print(); }
        
  return boost_;
}

HepMC::FourVector * BetaBoostEvtVtxGenerator::newVertex ( ) [virtual]

return a new event vertex

Definition at line 169 of file BetaBoostEvtVtxGenerator.cc.

References BetaFunction(), fRandom, fSigmaZ, fTimeOffset, fVertex, fX0, fY0, fZ0, mathSSE::sqrt(), X, and Gflash::Z.

Referenced by produce().

                                                     {

        
  double X,Y,Z;
        
  double tmp_sigz = fRandom->fire(0., fSigmaZ);
  Z = tmp_sigz + fZ0;

  double tmp_sigx = BetaFunction(Z,fZ0); 
  // need sqrt(2) for beamspot width relative to single beam width
  tmp_sigx /= sqrt(2.0);
  X = fRandom->fire(0.,tmp_sigx) + fX0; // + Z*fdxdz ;

  double tmp_sigy = BetaFunction(Z,fZ0);
  // need sqrt(2) for beamspot width relative to single beam width
  tmp_sigy /= sqrt(2.0);
  Y = fRandom->fire(0.,tmp_sigy) + fY0; // + Z*fdydz;

  double tmp_sigt = fRandom->fire(0., fSigmaZ);
  double T = tmp_sigt + fTimeOffset; 

  if ( fVertex == 0 ) fVertex = new HepMC::FourVector();
  fVertex->set(X,Y,Z,T);
                
  return fVertex;
}

BetaBoostEvtVtxGenerator& BetaBoostEvtVtxGenerator::operator= ( const BetaBoostEvtVtxGenerator & rhs ) [private]

Copy assignment operator

void BetaBoostEvtVtxGenerator::Phi ( double m = 0 ) [inline]

set half crossing angle

Definition at line 73 of file BetaBoostEvtVtxGenerator.cc.

References m.

{ phi_=m; }

void BetaBoostEvtVtxGenerator::produce	(	edm::Event &	evt,
		const edm::EventSetup &
	)		`[virtual]`

Implements edm::EDProducer.

Definition at line 279 of file BetaBoostEvtVtxGenerator.cc.

References edm::Event::getByLabel(), GetInvLorentzBoost(), newVertex(), edm::Event::put(), and sourceLabel.

{
  
  
  Handle<HepMCProduct> HepMCEvt ;    
  evt.getByLabel( sourceLabel, HepMCEvt ) ;
  
  // generate new vertex & apply the shift 
  //
  HepMCEvt->applyVtxGen( newVertex() ) ;
 
  //HepMCEvt->LorentzBoost( 0., 142.e-6 );
  HepMCEvt->boostToLab( GetInvLorentzBoost(), "vertex" );
  HepMCEvt->boostToLab( GetInvLorentzBoost(), "momentum" );    
  // OK, create a (pseudo)product and put in into edm::Event
  //
  auto_ptr<bool> NewProduct(new bool(true)) ;      
  evt.put( NewProduct ) ;       
  return ;
}

void BetaBoostEvtVtxGenerator::sigmaZ ( double s = 1.0 )

set resolution in Z in cm

Definition at line 203 of file BetaBoostEvtVtxGenerator.cc.

References Exception, fSigmaZ, and alignCSCRings::s.

{ 
  if (s>=0 ) {
    fSigmaZ=s; 
  }
  else {
    throw cms::Exception("LogicError")
      << "Error in BetaBoostEvtVtxGenerator::sigmaZ: "
      << "Illegal resolution in Z (negative)";
  }
}