THcHallCSpectrometer Class Reference

A standard Hall C spectrometer apparatus.

The usual name of this object is either "H", "P", "S" for HMS, suPerHMS, or SOS respectively

Defines the functions FindVertices() and TrackCalc(), which are common to the HMS, SHMS and SOS.

FindVertices() transports all the tracks in focal plane transport coordinates to the target using the method CalculateTargetQuantities() which uses the standard optics polynomials. The tracks are then rotated to the LAB coordinate system where +Z points to beam dump, +Y is up, and +X is beam left. The Golden track is then selected using one of the methods BestTrackSimple(), BestTrackUsingPrune(), BestTrackUsingScin(), depending on parameter settings.

Author

S. A. Wood

Definition at line 36 of file THcHallCSpectrometer.h.

Classes
struct	reconTerm

Public Member Functions
virtual void	AddEvtType (int evtype)
virtual Int_t	BestTrackSimple ()
	Choose best track based on Chisq. More...
virtual Int_t	BestTrackUsingPrune ()
	Choose best track after pruning. More...
virtual Int_t	BestTrackUsingScin ()
	Choose best track using closeness to scintillator hits. More...
virtual void	CalculateTargetQuantities (THaTrack *track, Double_t &gbeam_y, Double_t &xptar, Double_t &ytar, Double_t &yptar, Double_t &delta)
	Transport focal plane track to target. More...
virtual Int_t	Decode (const THaEvData &)
virtual Int_t	DefineVariables (EMode mode=kDefine)
virtual void	EnforcePruneLimits ()
	Enforce minimum values for the prune cuts. More...
virtual Int_t	FindVertices (TClonesArray &tracks)
	Reconstruct target coordinates. More...
Double_t	GetBetaAtPcentral () const
virtual Int_t	GetNumTypes ()
Double_t	GetParticleMass () const
Bool_t	GetTrSorting () const
Bool_t	InsideDipoleExitWindow (Double_t x_fp, Double_t xp_fp, Double_t y_fp, Double_t yp_fp)
virtual Bool_t	IsMyEvent (Int_t evtype) const
virtual Bool_t	IsPresent ()
virtual Int_t	ReadDatabase (const TDatime &date)
	Loads parameters to characterize a Hall C spectrometer. More...
virtual Int_t	ReadRunDatabase (const TDatime &date)
virtual void	SetEvtType (int evtype)
Bool_t	SetTrSorting (Bool_t set=kFALSE)
	THcHallCSpectrometer (const char *name, const char *description)
virtual Int_t	TrackCalc ()
virtual Int_t	TrackTimes (TClonesArray *tracks)
virtual	~THcHallCSpectrometer ()

Protected Member Functions
Bool_t	HMSDipoleExitWindow (Double_t x_dip, Double_t y_dip)
void	InitializeReconstruction ()
Bool_t	SHMSDipoleExitWindow (Double_t x_dip, Double_t y_dip)

Protected Attributes
std::vector< Int_t >	eventtypes
Double_t	fAngOffset_x
Double_t	fAngOffset_y
Double_t	fAngSlope_x
Double_t	fAngSlope_y
THcDC *	fDC
Double_t	fDeltaOffset
Double_t	fDetOffset_x
Double_t	fDetOffset_y
Int_t	fGoodTrack
THcHodoscope *	fHodo
Double_t	fHodoCenter3
Double_t	fHodoCenter4
Double_t	fMispointing_x
Double_t	fMispointing_y
Int_t	fNPlanes
Int_t	fNReconTerms
Int_t	fNtracks
Double_t	fOopCentralOffset
Double_t	fPartMass
Double_t	fPCentralOffset
Double_t	fPhi_lab
Double_t	fPhiOffset
Bool_t	fPresent
Double_t	fPruneBeta
Double_t	fPruneChiBeta
Double_t	fPruneDelta
Double_t	fPruneDf
Double_t	fPruneDipoleExit
Double_t	fPruneFpTime
Double_t	fPruneNPMT
Double_t	fPruneSelect
Double_t	fPruneXp
Double_t	fPruneYp
Double_t	fPruneYtar
std::vector< reconTerm >	fReconTerms
Double_t	fSatCorr
Double_t	fScin2XdZpos
Double_t	fScin2XSpacing
Double_t	fScin2XZpos
Double_t	fScin2YdZpos
Double_t	fScin2YSpacing
Double_t	fScin2YZpos
Double_t	fSelBetaMax
Double_t	fSelBetaMin
Double_t	fSeldEdX1Max
Double_t	fSeldEdX1Min
Double_t	fSelEtMax
Double_t	fSelEtMin
Double_t	fSelNDegreesMin
Int_t	fSelUsingPrune
Int_t	fSelUsingScin
Double_t	fTheta_lab
Double_t	fThetaCentralOffset
Double_t	fThetaOffset
Bool_t	fUseHMSDipoleExitWindow
Bool_t	fUseSHMSDipoleExitWindow
Double_t	fZTrueFocus

Static Protected Attributes
static const UInt_t	kSortTracks = BIT(16)

#include <THcHallCSpectrometer.h>

Inheritance diagram for THcHallCSpectrometer:

Constructor & Destructor Documentation

THcHallCSpectrometer::THcHallCSpectrometer	(	const char *	name,
		const char *	description
	)

Definition at line 110 of file THcHallCSpectrometer.cxx.

THcHallCSpectrometer::~THcHallCSpectrometer ( )

virtual

Definition at line 123 of file THcHallCSpectrometer.cxx.

Member Function Documentation

void THcHallCSpectrometer::AddEvtType ( int  evtype )

virtual

Definition at line 1099 of file THcHallCSpectrometer.cxx.

Int_t THcHallCSpectrometer::BestTrackSimple ( )

virtual

Choose best track based on Chisq.

Choose the track with the lowest tracking fitting Chisq to be the "best track"

Definition at line 599 of file THcHallCSpectrometer.cxx.

Int_t THcHallCSpectrometer::BestTrackUsingPrune ( )

virtual

Choose best track after pruning.

Select as best track the track with the lowest Chisq after pruning tracks that don't meet various criteria such as xptar, yptar, ytar delta, beta, degrees of freedom (of track fit), difference between measured beta and beta from p, chisq of beta fit, focal plane time and number of PMT hit.

Prune on num pmt hits

Definition at line 776 of file THcHallCSpectrometer.cxx.

Int_t THcHallCSpectrometer::BestTrackUsingScin ( )

virtual

Choose best track using closeness to scintillator hits.

Select as best track the track closest to a S2Y hit. If there are no S2Y hits, select the track closest to a S2X hit.

Also reject tracks if they fail dEdx, beta, or calorimeter energy cuts.

Definition at line 619 of file THcHallCSpectrometer.cxx.

void THcHallCSpectrometer::CalculateTargetQuantities ( THaTrack *  track, Double_t &  gbeam_y, Double_t &  xptar, Double_t &  ytar, Double_t &  yptar, Double_t &  delta  )

virtual

Transport focal plane track to target.

Transport a track in the the focal plane coordinate system to the target using the reconstruction matrix elements.

If Xsatcorr is 2000, apply a specific correction to delta for saturation effects.

Definition at line 519 of file THcHallCSpectrometer.cxx.

Int_t THcHallCSpectrometer::Decode ( const THaEvData &  evdata )

virtual

Definition at line 1076 of file THcHallCSpectrometer.cxx.

Int_t THcHallCSpectrometer::DefineVariables ( EMode  mode = kDefine )

virtual

Definition at line 131 of file THcHallCSpectrometer.cxx.

void THcHallCSpectrometer::EnforcePruneLimits ( )

virtual

Enforce minimum values for the prune cuts.

Definition at line 453 of file THcHallCSpectrometer.cxx.

Int_t THcHallCSpectrometer::FindVertices ( TClonesArray &  tracks )

virtual

Reconstruct target coordinates.

Reconstruct target coordinates for all tracks found in the focal plane.

In Hall A, this is passed off to the tracking detectors.

In Hall C, we do the target traceback here since the traceback should not depend on which tracking detectors are used.

Select the best track.

Definition at line 468 of file THcHallCSpectrometer.cxx.

Double_t THcHallCSpectrometer::GetBetaAtPcentral ( ) const

inline

Definition at line 62 of file THcHallCSpectrometer.h.

virtual Int_t THcHallCSpectrometer::GetNumTypes ( )

inlinevirtual

Definition at line 68 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::GetParticleMass ( ) const

inline

Definition at line 61 of file THcHallCSpectrometer.h.

Bool_t THcHallCSpectrometer::GetTrSorting

(

)

const

Definition at line 165 of file THcHallCSpectrometer.cxx.

Bool_t THcHallCSpectrometer::HMSDipoleExitWindow ( Double_t  x_dip, Double_t  y_dip  )

protected

Definition at line 1147 of file THcHallCSpectrometer.cxx.

void THcHallCSpectrometer::InitializeReconstruction ( )

protected

Definition at line 171 of file THcHallCSpectrometer.cxx.

Bool_t THcHallCSpectrometer::InsideDipoleExitWindow	(	Double_t	x_fp,
		Double_t	xp_fp,
		Double_t	y_fp,
		Double_t	yp_fp
	)

Definition at line 1117 of file THcHallCSpectrometer.cxx.

Bool_t THcHallCSpectrometer::IsMyEvent ( Int_t  evtype ) const

virtual

Definition at line 1108 of file THcHallCSpectrometer.cxx.

virtual Bool_t THcHallCSpectrometer::IsPresent ( )

inlinevirtual

Definition at line 69 of file THcHallCSpectrometer.h.

Int_t THcHallCSpectrometer::ReadDatabase ( const TDatime &  date )

virtual

Loads parameters to characterize a Hall C spectrometer.

Loads parameters including the angle settings of the spectrometer, various offsets, and the name of the file containing the hut to target transformation polynomials. Also loads parameters to control best track selection.

Reads the hut to target transformation polynomial coefficients for use by CalculateTargetQuantities().

Calls SetCentralAngles(th_geo,ph_geo,bend_down) where bend_down is a flag that should equal kFALSE for Hall C spectrometers. th_geo and ph_geo are in degrees.

Definition at line 184 of file THcHallCSpectrometer.cxx.

Int_t THcHallCSpectrometer::ReadRunDatabase ( const TDatime &  date )

virtual

Definition at line 1091 of file THcHallCSpectrometer.cxx.

void THcHallCSpectrometer::SetEvtType ( int  evtype )

virtual

Definition at line 1103 of file THcHallCSpectrometer.cxx.

Bool_t THcHallCSpectrometer::SetTrSorting

(

Bool_t

set = kFALSE

)

Definition at line 154 of file THcHallCSpectrometer.cxx.

Bool_t THcHallCSpectrometer::SHMSDipoleExitWindow ( Double_t  x_dip, Double_t  y_dip  )

protected

Definition at line 1129 of file THcHallCSpectrometer.cxx.

Int_t THcHallCSpectrometer::TrackCalc ( )

virtual

Definition at line 575 of file THcHallCSpectrometer.cxx.

Int_t THcHallCSpectrometer::TrackTimes ( TClonesArray *  tracks )

virtual

Definition at line 1065 of file THcHallCSpectrometer.cxx.

Member Data Documentation

std::vector<Int_t> THcHallCSpectrometer::eventtypes

protected

Definition at line 162 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fAngOffset_x

protected

Definition at line 141 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fAngOffset_y

protected

Definition at line 142 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fAngSlope_x

protected

Definition at line 139 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fAngSlope_y

protected

Definition at line 140 of file THcHallCSpectrometer.h.

THcDC* THcHallCSpectrometer::fDC

protected

Definition at line 121 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fDeltaOffset

protected

Definition at line 148 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fDetOffset_x

protected

Definition at line 143 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fDetOffset_y

protected

Definition at line 144 of file THcHallCSpectrometer.h.

Int_t THcHallCSpectrometer::fGoodTrack

protected

Definition at line 97 of file THcHallCSpectrometer.h.

THcHodoscope* THcHallCSpectrometer::fHodo

protected

Definition at line 120 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fHodoCenter3

protected

Definition at line 115 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fHodoCenter4

protected

Definition at line 115 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fMispointing_x

protected

Definition at line 154 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fMispointing_y

protected

Definition at line 155 of file THcHallCSpectrometer.h.

Int_t THcHallCSpectrometer::fNPlanes

protected

Definition at line 100 of file THcHallCSpectrometer.h.

Int_t THcHallCSpectrometer::fNReconTerms

protected

Definition at line 123 of file THcHallCSpectrometer.h.

Int_t THcHallCSpectrometer::fNtracks

protected

Definition at line 101 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fOopCentralOffset

protected

Definition at line 150 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPartMass

protected

Definition at line 84 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPCentralOffset

protected

Definition at line 151 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPhi_lab

protected

Definition at line 153 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPhiOffset

protected

Definition at line 147 of file THcHallCSpectrometer.h.

Bool_t THcHallCSpectrometer::fPresent

protected

Definition at line 163 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneBeta

protected

Definition at line 89 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneChiBeta

protected

Definition at line 91 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneDelta

protected

Definition at line 88 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneDf

protected

Definition at line 90 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneDipoleExit

protected

Definition at line 83 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneFpTime

protected

Definition at line 92 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneNPMT

protected

Definition at line 93 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneSelect

protected

Definition at line 95 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneXp

protected

Definition at line 85 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneYp

protected

Definition at line 86 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fPruneYtar

protected

Definition at line 87 of file THcHallCSpectrometer.h.

std::vector<reconTerm> THcHallCSpectrometer::fReconTerms

protected

Definition at line 136 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fSatCorr

protected

Definition at line 94 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fScin2XdZpos

protected

Definition at line 111 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fScin2XSpacing

protected

Definition at line 116 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fScin2XZpos

protected

Definition at line 110 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fScin2YdZpos

protected

Definition at line 113 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fScin2YSpacing

protected

Definition at line 116 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fScin2YZpos

protected

Definition at line 112 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fSelBetaMax

protected

Definition at line 107 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fSelBetaMin

protected

Definition at line 106 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fSeldEdX1Max

protected

Definition at line 105 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fSeldEdX1Min

protected

Definition at line 104 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fSelEtMax

protected

Definition at line 109 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fSelEtMin

protected

Definition at line 108 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fSelNDegreesMin

protected

Definition at line 103 of file THcHallCSpectrometer.h.

Int_t THcHallCSpectrometer::fSelUsingPrune

protected

Definition at line 99 of file THcHallCSpectrometer.h.

Int_t THcHallCSpectrometer::fSelUsingScin

protected

Definition at line 98 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fTheta_lab

protected

Definition at line 152 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fThetaCentralOffset

protected

Definition at line 149 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fThetaOffset

protected

Definition at line 146 of file THcHallCSpectrometer.h.

Bool_t THcHallCSpectrometer::fUseHMSDipoleExitWindow

protected

Definition at line 79 of file THcHallCSpectrometer.h.

Bool_t THcHallCSpectrometer::fUseSHMSDipoleExitWindow

protected

Definition at line 78 of file THcHallCSpectrometer.h.

Double_t THcHallCSpectrometer::fZTrueFocus

protected

Definition at line 145 of file THcHallCSpectrometer.h.

const UInt_t THcHallCSpectrometer::kSortTracks = BIT(16)

staticprotected

Definition at line 160 of file THcHallCSpectrometer.h.

Collaboration diagram for THcHallCSpectrometer:

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

• /Users/saw/ROOT/hcana/src/THcHallCSpectrometer.h
• /Users/saw/ROOT/hcana/src/THcHallCSpectrometer.cxx