beamlineutil::BeamlineMagneticField Class Reference

#include "/cvmfs/nova-development.opensciencegrid.org/novasoft/releases/N21-03-08/BeamlineUtils/BeamlineMagneticField.h"

Public Member Functions
	BeamlineMagneticField (fhicl::ParameterSet const &pset)
	BeamlineMagneticField (fhicl::ParameterSet const &pset, art::ActivityRegistry &)
float	MagnetCurrent (unsigned int beamline_run)
	Return the magnet current for a given beamline data run. More...
float	MagneticField (unsigned int beamline_run)
	Return the magnetic field for a given beamline data run. More...
float	FieldFromCurrent (float magnet_current)
	Convert magnet current to magnetic field using field mapping information. More...

Private Attributes
float	fCurrentToField
std::map< unsigned int, float >	fMagnetInfo

Detailed Description

Definition at line 32 of file BeamlineMagneticField.h.

Constructor & Destructor Documentation

beamlineutil::BeamlineMagneticField::BeamlineMagneticField

(

fhicl::ParameterSet const &

pset

)

Definition at line 15 of file BeamlineMagneticField_service.cc.

References fCurrentToField, fMagnetInfo, and fhicl::ParameterSet::get().

                                                                                      {
  fhicl::ParameterSet magnet_currents = pset.get<fhicl::ParameterSet>("MagnetCurrents");
  std::vector<std::pair<unsigned int, float> > current_table
    = magnet_currents.get<std::vector<std::pair<unsigned int, float> > >("table");
  for (std::vector<std::pair<unsigned int, float > >::const_iterator current_table_it = current_table.begin();
       current_table_it != current_table.end(); ++current_table_it)
    fMagnetInfo[current_table_it->first] = current_table_it->second;
  fCurrentToField = pset.get<float>("CurrentToField");
}

beamlineutil::BeamlineMagneticField::BeamlineMagneticField	(	fhicl::ParameterSet const &	pset,
		art::ActivityRegistry &
	)

Definition at line 26 of file BeamlineMagneticField_service.cc.

  : BeamlineMagneticField(pset) {
}

Member Function Documentation

float beamlineutil::BeamlineMagneticField::FieldFromCurrent

(

float

magnet_current

)

Convert magnet current to magnetic field using field mapping information.

Definition at line 56 of file BeamlineMagneticField_service.cc.

References abs(), DEFINE_ART_SERVICE, and cet::pow().

Referenced by MagneticField(), and beamlinereco::WCTrackReco::produce().

                                                                              {

  // eqn from Mark (technote doesn't exist yet - add docdb info here once it does)
  // eqn gives you the aboslute value of the field - use the sign of the current to determine sign of field
  float field_magnitude = -0.0294 + abs(magnet_current)/985.3 - pow(abs(magnet_current)/3451.2,2);
  // returns value of field with sign of current
  float b_field = copysign(field_magnitude, magnet_current);

  return b_field;

}

float beamlineutil::BeamlineMagneticField::MagnetCurrent

(

unsigned int

beamline_run

)

Return the magnet current for a given beamline data run.

Definition at line 31 of file BeamlineMagneticField_service.cc.

References fMagnetInfo, and updateRunHistoryTables::run.

Referenced by MagneticField().

                                                                       {

  if (run < fMagnetInfo.begin()->first)
    throw cet::exception("BeamlineMagneticField")
      << "Requested run " << run << " has no magnet current information available.";

  unsigned int run_with_current = run;
  while (!fMagnetInfo.count(run_with_current))
    run_with_current -= 1;

  return fMagnetInfo[run_with_current];

}

float beamlineutil::BeamlineMagneticField::MagneticField

(

unsigned int

beamline_run

)

Return the magnetic field for a given beamline data run.

Definition at line 46 of file BeamlineMagneticField_service.cc.

References FieldFromCurrent(), and MagnetCurrent().

Referenced by beamlinereco::WCTrackReco::produce(), and daq2raw::BeamlineUnpack::UnpackConfig().

                                                                       {

  float magnet_current = this->MagnetCurrent(run);
  float b_field = this->FieldFromCurrent(magnet_current);

  return b_field;

}

Member Data Documentation

float beamlineutil::BeamlineMagneticField::fCurrentToField

private

Definition at line 51 of file BeamlineMagneticField.h.

Referenced by BeamlineMagneticField().

std::map<unsigned int, float> beamlineutil::BeamlineMagneticField::fMagnetInfo

private

Definition at line 52 of file BeamlineMagneticField.h.

Referenced by BeamlineMagneticField(), and MagnetCurrent().

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

• /cvmfs/nova-development.opensciencegrid.org/novasoft/releases/N21-03-08/BeamlineUtils/BeamlineMagneticField.h
• /cvmfs/nova-development.opensciencegrid.org/novasoft/releases/N21-03-08/BeamlineUtils/BeamlineMagneticField_service.cc