biasing::EcalDarkBremFilter Class Reference

This class is meant to filter for events that produce a dark brem occuring within the ECal and producing an A' of a minimum energy threshold [MeV]. More...

#include <EcalDarkBremFilter.h>

Public Member Functions
	EcalDarkBremFilter (const std::string &name, framework::config::Parameters &parameters)
	Class constructor.
	~EcalDarkBremFilter ()
	Class destructor.
std::vector< simcore::TYPE >	getTypes () override
	Get the types of actions this class can do.
void	beginOfEventAction (const G4Event *event) override
	Reset flag on if A' has been found.
G4ClassificationOfNewTrack	classifyNewTrack (const G4Track *aTrack, const G4ClassificationOfNewTrack &currentTrackClass) override
	We return the classification of the track done by the PartialEnergySorter, but we can check here if the A' has been created above the required energy.
void	newStage () override
	When using the PartialEnergySorter, the first time that a new stage begins is when all particles are now below the threshold.
void	postUserTrackingAction (const G4Track *track) override
	Make sure A' is saved.
Public Member Functions inherited from simcore::UserAction
	UserAction (const std::string &name, framework::config::Parameters &parameters)
	Constructor.
	DECLARE_FACTORY (UserAction, std::shared_ptr< UserAction >, const std::string &, framework::config::Parameters &)
	factory for user actions
virtual	~UserAction ()=default
	Destructor.
virtual void	endOfEventAction (const G4Event *)
	Method called at the end of every event.
virtual void	beginOfRunAction (const G4Run *)
	Method called at the beginning of a run.
virtual void	endOfRunAction (const G4Run *)
	Method called at the end of a run.
virtual void	preUserTrackingAction (const G4Track *)
	Method called before the UserTrackingAction.
virtual void	stepping (const G4Step *)
	Method called after each simulation step.
virtual void	prepareNewEvent ()
	Method called at the beginning of a new event.

Private Member Functions
bool	inDesiredVolume (const G4Track *) const
	Check if input volume is in the desired volume name.

Private Attributes
double	threshold_
	Minimum energy [MeV] that the A' should have to keep the event.
std::vector< G4LogicalVolume * >	volumes_
	The volumes that the filter will be applied to.
bool	found_ap_
	Have we found the A' yet?

Additional Inherited Members
Protected Member Functions inherited from simcore::UserAction
UserEventInformation *	getEventInfo () const
	Get a handle to the event information.
const std::map< int, ldmx::SimParticle > &	getCurrentParticleMap () const
	Get the current particle map.
void	abortEvent (const std::string &reason) const
	Helper to abort an event with a message.
Protected Attributes inherited from simcore::UserAction
std::string	name_ {""}
	Name of the UserAction.
framework::config::Parameters	parameters_
	The set of parameters used to configure this class.
mutable::framework::logging::logger	the_log_
	the logging channel user actions can use ldmx_log with

Detailed Description

This class is meant to filter for events that produce a dark brem occuring within the ECal and producing an A' of a minimum energy threshold [MeV].

Note

The threshold that the A' needs to have should be equal to or greater than the threshold of the PartialEnergySorter.

See also

PartialEnergySorter Here we assume that the partial energy sorter is being run in sequence with this filter. This filter makes sure that any events passing this filter have an A' of the required input energy and generated inside of the required input volume.

Definition at line 51 of file EcalDarkBremFilter.h.

Constructor & Destructor Documentation

EcalDarkBremFilter()

EcalDarkBremFilter::EcalDarkBremFilter	(	const std::string &	name,
		framework::config::Parameters &	parameters )

Class constructor.

Retrieve the necessary configuration parameters

Definition at line 14 of file EcalDarkBremFilter.cxx.

    : simcore::UserAction(name, parameters) {
  threshold_ = parameters.get<double>("threshold");
 
  /*
   * We look for the logical volumes that match the following pattern:
   *  - 'volume' is in the name AND
   *  - 'Si' OR 'W' OR 'CFMix' OR 'PCB' are in the name
   */
  for (G4LogicalVolume* volume : *G4LogicalVolumeStore::GetInstance()) {
    G4String volume_name = volume->GetName();
    // looking for ecal volumes
    if (volume_name.contains("volume") and
        (volume_name.contains("Si") or volume_name.contains("W") or
         volume_name.contains("CFMix") or volume_name.contains("PCB") or
         volume_name.contains("Al"))) {
      volumes_.push_back(volume);
    }
  }
 
  ldmx_log(trace) << "Looking for A' in: ";
  for (auto const& volume : volumes_) {
    ldmx_log(trace) << "\t" << volume->GetName() << ", ";
  }
}

References framework::config::Parameters::get(), threshold_, and volumes_.

~EcalDarkBremFilter()

biasing::EcalDarkBremFilter::~EcalDarkBremFilter ( )

inline

Class destructor.

Definition at line 64 of file EcalDarkBremFilter.h.

{}

Member Function Documentation

beginOfEventAction()

void EcalDarkBremFilter::beginOfEventAction ( const G4Event * event )

overridevirtual

Reset flag on if A' has been found.

Parameters

event

unused

Reimplemented from simcore::UserAction.

Definition at line 41 of file EcalDarkBremFilter.cxx.

                                                          {
  found_ap_ = false;
  return;
}

References found_ap_.

classifyNewTrack()

G4ClassificationOfNewTrack EcalDarkBremFilter::classifyNewTrack ( const G4Track * aTrack, const G4ClassificationOfNewTrack & currentTrackClass )

overridevirtual

We return the classification of the track done by the PartialEnergySorter, but we can check here if the A' has been created above the required energy.

Checks a new track for being an A' above threshold_ if it is an A', sets the found_ap_ member

See also

PartialEnergySort::classifyNewTrack

Parameters

aTrack	The Geant4 track.
currentTrackClass	The current track classification.

Returns

current track classification

Reimplemented from simcore::UserAction.

Definition at line 46 of file EcalDarkBremFilter.cxx.

                                                                 {
  if (aTrack->GetParticleDefinition() == G4APrime::APrime()) {
    // there is an A'! Yay!
    ldmx_log(trace) << "Found A', still need to check if it originated in "
                       "requested volume.";
 
    if (not found_ap_ and aTrack->GetTotalEnergy() > threshold_) {
      // The A' is the first one created in this event and is above the energy
      // threshold
      found_ap_ = true;
    } else if (found_ap_) {
      abortEvent("Found more than one A' during filtering.");
    } else {
      abortEvent("A' was not produced above the required threshold.");
    }
  }
 
  return cl;
}

References simcore::UserAction::abortEvent(), found_ap_, and threshold_.

getTypes()

std::vector< simcore::TYPE > biasing::EcalDarkBremFilter::getTypes ( )

inlineoverridevirtual

Get the types of actions this class can do.

Returns

list of action types this class does

Implements simcore::UserAction.

Definition at line 71 of file EcalDarkBremFilter.h.

                                             {
    return {simcore::TYPE::STACKING, simcore::TYPE::EVENT,
            simcore::TYPE::TRACKING};
  }

inDesiredVolume()

bool EcalDarkBremFilter::inDesiredVolume ( const G4Track * track ) const

private

Check if input volume is in the desired volume name.

Parameters

pointer

to track to check

Returns

true if originated in desired volume

Comparing the pointers to logical volumes isn't very robust. TODO find a better way to do this

Definition at line 97 of file EcalDarkBremFilter.cxx.

                                                                   {
  auto in_vol = track->GetLogicalVolumeAtVertex();
  for (auto const& volume : volumes_) {
    if (in_vol == volume) return true;
  }
 
  return false;
}

References volumes_.

Referenced by postUserTrackingAction().

newStage()

void EcalDarkBremFilter::newStage ( )

overridevirtual

When using the PartialEnergySorter, the first time that a new stage begins is when all particles are now below the threshold.

We take this opportunity to make sure that the A' has been found.

See also

PartialEnergySort::newStage

Reimplemented from simcore::UserAction.

Definition at line 67 of file EcalDarkBremFilter.cxx.

                                  {
  if (not found_ap_) abortEvent("A' wasn't produced.");
 
  return;
}

References simcore::UserAction::abortEvent(), and found_ap_.

postUserTrackingAction()

void EcalDarkBremFilter::postUserTrackingAction ( const G4Track * track )

overridevirtual

Make sure A' is saved.

If passed track is A', set save status to true Aborts event if A' does not originate in desired volume. This is the last check that the event needs to pass to be kept.

Parameters

track

G4Track to check if it is an A'

Reimplemented from simcore::UserAction.

Definition at line 73 of file EcalDarkBremFilter.cxx.

                                                                    {
  // Check that generational stacking is working
  ldmx_log(trace) << track->GetTrackID() << " "
                  << track->GetParticleDefinition()->GetPDGEncoding();
 
  const G4VProcess* creator = track->GetCreatorProcess();
  if (creator and
      creator->GetProcessName().contains(G4DarkBremsstrahlung::PROCESS_NAME)) {
    // make sure all secondaries of dark brem process are saved
    simcore::UserTrackInformation* user_info =
        simcore::UserTrackInformation::get(track);
    // make sure A' is persisted into output file
    user_info->setSaveFlag(true);
    if (track->GetParticleDefinition() == G4APrime::APrime()) {
      // check if A' was made in the desired volume and has the minimum energy
      if (not inDesiredVolume(track)) {
        abortEvent("A' wasn't produced inside of the requested volume.");
      }  // A' was made in desired volume and has the minimum energy
    }  // track was A'
  }  // track created by dark brem process
 
  return;
}

References simcore::UserAction::abortEvent(), simcore::UserTrackInformation::get(), inDesiredVolume(), and simcore::UserTrackInformation::setSaveFlag().

Member Data Documentation

found_ap_

bool biasing::EcalDarkBremFilter::found_ap_

private

Have we found the A' yet?

Reset to false in beginOfEventAction

Definition at line 154 of file EcalDarkBremFilter.h.

Referenced by beginOfEventAction(), classifyNewTrack(), and newStage().

threshold_

double biasing::EcalDarkBremFilter::threshold_

private

Minimum energy [MeV] that the A' should have to keep the event.

Also used by PartialEnergySorter to determine which tracks should be processed first.

Parameter Name: 'threshold'

Definition at line 142 of file EcalDarkBremFilter.h.

Referenced by classifyNewTrack(), and EcalDarkBremFilter().

volumes_

std::vector<G4LogicalVolume*> biasing::EcalDarkBremFilter::volumes_

private

The volumes that the filter will be applied to.

Definition at line 147 of file EcalDarkBremFilter.h.

Referenced by EcalDarkBremFilter(), and inDesiredVolume().

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

• Biasing/include/Biasing/EcalDarkBremFilter.h
• Biasing/src/Biasing/EcalDarkBremFilter.cxx