Processor to drift primary electrons according to the characteristics of the choosen gas to pad plane. More...

Inheritance diagram for marlintpc::DriftProcessor:

Public Member Functions
virtual Processor *	newProcessor ()

	DriftProcessor ()
	C'tor.

virtual	~DriftProcessor ()
	D'tor.

virtual void	init ()
	Called at the begin of the job before anything is read. More...

virtual void	processRunHeader (lcio::LCRunHeader *run)
	Called for every run.

virtual void	processEvent (lcio::LCEvent *evt)
	Called for every event - the working horse.

virtual void	end ()
	Called after all events were processed for clean up.

Protected Member Functions
void	MakeElectronDriftCoordinates ()
	Calculates coordinates of the drifted electrons. More...

void	GetElectronCoordinates (SimTrackerHit *)
	Gets electron coordinates before drifting.

Protected Attributes
std::string	_inputCollectionName
	Name of the input collection.

std::string	_outputCollectionName
	Name of the output collection.

std::string	_tpcConditionsColName
	Name of collection with TPCConditions.

std::string	_gas
	Name of the gas used in the TPC.

float	_EField

float	_BField

int	_transient
	If not set to 0 output collection is set transient.

gsl_rng *	r
	Random generator for landau and gaussian.

double	x_e

double	y_e

double	z_e

double	t_e

double	_TPCLength
	Maximum drift length of the TPC.

double	_TPCOuterRadius
	Outer Radius of the TPC.

double	_TPCInnerRadius
	Inner Radius of the TPC.

double	_distance
	Drift distance of an electron.

float	xdrift

float	ydrift

float	zdrift

float	tdrift
	Coordinates of drifted e-.

float	_vdrift
	Drift velocity in mm/us.

float	_difflong
	Longitudinal diffusion in um/sqrt(cm)

float	_difftrans
	Transversal diffusion in um/sqrt(cm)

double	_meanAmp
	Mean amplification of an single electron.

TPCGas *	_gasClass
	gas object to calulated properties like drift and diffusion

double	_ionisationEnergy
	Ionisation energy of the gas.

bool	_fullCurlerBackwardCompatibility
	Flag whether to multiply hits in curlers with 10.

bool	_isFirstEvent
	Flag to store if this is the first event processed after init.

double	_attachment
	Additional attachment in drift reagion due to water and/or oxygen in gas.

Detailed Description

Processor to drift primary electrons according to the characteristics of the choosen gas to pad plane.

Longitudinal and transverse diffusion are taken into account as well as magnetic fields.

Collection of SimTrackerHits with charge values set as dEdx

Collection containing SimTrackerHits with x,y-position on pad plane.

Parameters

InputCollectionName	Name of input collection, SimTrackerHits
OutputCollectionName	Name of output collection, SimTrackerHits
Transient	If not 0 the output collection is set transient
Gas	The gas in the TPC [TDR, P10, P5, T2K] (default: TDR)
DriftField	Value of the drift field in V/cm
IonisationEnergy	Mean ionisation energy of the chambers gas in [GeV] (default: 26E-9 (argon))
FullCurlerBackwardCompatibility	NOT IMPLEMENTED YET: Turn on for data from PrimaryIonisation < r1876 and FullCurler turned off (default: false) Without FullCurler the old versions of PrimaryIonisation grouped 10 electrons but did not set the charge currectly.

Todo:: Implement full curler handling (10 electrons per hit for low p_t and low p_z)

Member Function Documentation

void marlintpc::DriftProcessor::init ( )

virtual

Called at the begin of the job before anything is read.

Use to initialize the processor, e.g. book histograms.

void marlintpc::DriftProcessor::MakeElectronDriftCoordinates ( )

protected

Calculates coordinates of the drifted electrons.

Longitudinal as well as transvers diffusion are taken into account.

Referenced by processEvent().

double marlintpc::DriftProcessor::x_e

protected

Coordinates of the electron.

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