Hal::HelixBase Class Reference

Inheritance diagram for Hal::HelixBase:

Public Member Functions
	HelixBase (const HelixBase &t)
	HelixBase (const TVector3 &x, const TVector3 &mom, Double_t charge, Double_t conversion=0.)
Double_t	GetCurv () const
Double_t	GetPhi0 () const
Double_t	GetDipAngle () const
Double_t	GetH () const
HelixBase &	operator= (const HelixBase &helix)
void	PathLengths (const HelixBase &h, Double_t &s1, Double_t &s2) const
Double_t	GetPathAbsMin (Double_t s1, Double_t s2) const
Double_t	GetPeriod () const
Double_t	GetRotationDirection () const

Static Public Member Functions
static void	SetMagField (Double_t Bz)
static Double_t	MaxPath ()

Protected Member Functions
	HelixBase (Double_t x, Double_t y, Double_t z, Double_t px, Double_t py, Double_t pz, Double_t charge, Double_t conversion=0.)
void	BasePathLength (Double_t r, Double_t x, Double_t y, Double_t &s1, Double_t &s2) const
void	BaseSetParams (const TVector3 &x, const TVector3 &mom, Double_t charge, Double_t conversion=0.)
void	BaseSetParams (Double_t x, Double_t y, Double_t z, Double_t px, Double_t py, Double_t pz, Double_t charge, Double_t conversion=0)
Double_t	BaseGetXcenter () const
Double_t	BaseGetYcenter () const
Double_t	BaseGetStartX () const
Double_t	BaseGetStartY () const
Double_t	BaseGetStartZ () const
Double_t	BasePathLength (const TVector3 &point, Bool_t scanPeriods=kTRUE) const
Double_t	BasePathLength (Double_t x, Double_t y) const
TVector3	BasePosition (Double_t s) const
TVector3	BaseGetStartPoint () const
TVector3	BaseMomentum (Double_t s) const
Int_t	BaseIntersection (Double_t R, TVector3 &x1, TVector3 &x2) const
void	BasePrint () const
void	BasePathLength (Double_t r, Double_t &s1, Double_t &s2) const
void	BaseShift (Double_t x, Double_t y, Double_t z)
void	BaseFullEval (Double_t s, TVector3 &mom, TVector3 &pos) const

Detailed Description

Definition at line 19 of file HelixBase.h.

Constructor & Destructor Documentation

HelixBase() [1/4]

Hal::HelixBase::HelixBase ( Double_t x, Double_t y, Double_t z, Double_t px, Double_t py, Double_t pz, Double_t charge, Double_t conversion = 0. )

protected

Parameters

x	X start postion
y	Y start position
z	Z start position
px	px-momentum
py	py momentum
pz	pz momentum
charge
conversion

Definition at line 497 of file HelixBase.cxx.

HelixBase() [2/4]

Hal::HelixBase::HelixBase

(

)

Definition at line 25 of file HelixBase.cxx.

HelixBase() [3/4]

Hal::HelixBase::HelixBase

(

const HelixBase &

t

)

Definition at line 40 of file HelixBase.cxx.

HelixBase() [4/4]

Hal::HelixBase::HelixBase	(	const TVector3 &	x,
		const TVector3 &	mom,
		Double_t	charge,
		Double_t	conversion = 0. )

Parameters

x	initial position
mom	momentum at x
charge	electric charge in e
conversion	not used

Definition at line 56 of file HelixBase.cxx.

~HelixBase()

Hal::HelixBase::~HelixBase ( )

virtual

Definition at line 23 of file HelixBase.cxx.

Member Function Documentation

BaseFullEval()

void Hal::HelixBase::BaseFullEval ( Double_t s, TVector3 & mom, TVector3 & pos ) const

protected

calculate the momentum and position at given s

Parameters

s
mom
pos

Definition at line 544 of file HelixBase.cxx.

BaseGetStartPoint()

TVector3 Hal::HelixBase::BaseGetStartPoint ( ) const

protected

Returns

star point of helix

Definition at line 199 of file HelixBase.cxx.

BaseGetStartX()

Double_t Hal::HelixBase::BaseGetStartX ( ) const

inlineprotected

Returns

start X

Definition at line 102 of file HelixBase.h.

BaseGetStartY()

Double_t Hal::HelixBase::BaseGetStartY ( ) const

inlineprotected

Returns

start Y

Definition at line 107 of file HelixBase.h.

BaseGetStartZ()

Double_t Hal::HelixBase::BaseGetStartZ ( ) const

inlineprotected

Returns

start Z

Definition at line 112 of file HelixBase.h.

BaseGetXcenter()

Double_t Hal::HelixBase::BaseGetXcenter ( ) const

inlineprotected

Returns

x-center

Definition at line 92 of file HelixBase.h.

BaseGetYcenter()

Double_t Hal::HelixBase::BaseGetYcenter ( ) const

inlineprotected

Returns

y-center

Definition at line 97 of file HelixBase.h.

BaseIntersection()

Int_t Hal::HelixBase::BaseIntersection ( Double_t R, TVector3 & x1, TVector3 & x2 ) const

protected

calculate two points where circle intersect with cilider at given R

Parameters

R
x1
x2

Returns

number of solutions

Definition at line 81 of file HelixBase.cxx.

BaseMomentum()

TVector3 Hal::HelixBase::BaseMomentum ( Double_t s ) const

protected

calculate momentum at given point

Returns

Definition at line 517 of file HelixBase.cxx.

BasePathLength() [1/4]

Double_t Hal::HelixBase::BasePathLength ( const TVector3 & point, Bool_t scanPeriods = kTRUE ) const

protected

Parameters

point
scanPeriods	true if scan perdios

Returns

path at DCA between helix and point

Definition at line 303 of file HelixBase.cxx.

BasePathLength() [2/4]

void Hal::HelixBase::BasePathLength ( Double_t r, Double_t & s1, Double_t & s2 ) const

protected

calculate path lenght at fixed radii perpendicular to magnetic field

Parameters

r	radii
s1	first path
s2	second path

Definition at line 214 of file HelixBase.cxx.

BasePathLength() [3/4]

void Hal::HelixBase::BasePathLength ( Double_t r, Double_t x, Double_t y, Double_t & s1, Double_t & s2 ) const

protected

calculate path lenghts for intersection of helix and circle with center x,y

Parameters

r	circle radii
x	x-circle center
y	y-circle center
s1	first path
s2	second path

Definition at line 294 of file HelixBase.cxx.

BasePathLength() [4/4]

Double_t Hal::HelixBase::BasePathLength ( Double_t x, Double_t y ) const

protected

Parameters

x	point x-coordiante
y	point y-coordinate

Returns

path lenght at shortest distance between point and helix at xy plane

Definition at line 390 of file HelixBase.cxx.

BasePosition()

TVector3 Hal::HelixBase::BasePosition ( Double_t s ) const

protected

Parameters

s

Returns

helix corrdinates at lengith s

Definition at line 191 of file HelixBase.cxx.

BasePrint()

void Hal::HelixBase::BasePrint ( ) const

protected

Definition at line 108 of file HelixBase.cxx.

BaseSetParams() [1/2]

void Hal::HelixBase::BaseSetParams ( const TVector3 & x, const TVector3 & mom, Double_t charge, Double_t conversion = 0. )

protected

Parameters

x	start position
mom	momentum at X
charge	charge of particle
conversion	not used

Definition at line 115 of file HelixBase.cxx.

BaseSetParams() [2/2]

void Hal::HelixBase::BaseSetParams ( Double_t x, Double_t y, Double_t z, Double_t px, Double_t py, Double_t pz, Double_t charge, Double_t conversion = 0 )

protected

Parameters

x
y
z
px
py
pz
charge
conversion

Definition at line 139 of file HelixBase.cxx.

BaseShift()

void Hal::HelixBase::BaseShift ( Double_t x, Double_t y, Double_t z )

protected

shift this vector by given coordinates

Parameters

x
y
z

Definition at line 507 of file HelixBase.cxx.

GetCurv()

Double_t Hal::HelixBase::GetCurv ( ) const

inline

Returns

curvature of helix

Definition at line 190 of file HelixBase.h.

GetDipAngle()

Double_t Hal::HelixBase::GetDipAngle ( ) const

inline

Returns

lambda angle

Definition at line 200 of file HelixBase.h.

GetH()

Double_t Hal::HelixBase::GetH ( ) const

inline

Returns

qB

Definition at line 205 of file HelixBase.h.

GetPathAbsMin()

Double_t Hal::HelixBase::GetPathAbsMin	(	Double_t	s1,
		Double_t	s2 ) const

return minimal non-negative value of path

Parameters

s1
s2

Returns

Definition at line 534 of file HelixBase.cxx.

GetPeriod()

Double_t Hal::HelixBase::GetPeriod

(

)

const

Returns

helix period

Definition at line 100 of file HelixBase.cxx.

GetPhi0()

Double_t Hal::HelixBase::GetPhi0 ( ) const

inline

Returns

phase 0

Definition at line 195 of file HelixBase.h.

GetRotationDirection()

Double_t Hal::HelixBase::GetRotationDirection

(

)

const

Returns

-1 if particle goes clockwise

Definition at line 515 of file HelixBase.cxx.

MaxPath()

static Double_t Hal::HelixBase::MaxPath ( )

inlinestatic

Returns

max path

Definition at line 245 of file HelixBase.h.

operator=()

HelixBase & Hal::HelixBase::operator=

(

const HelixBase &

helix

)

assignement operator

Parameters

helix

Returns

Definition at line 176 of file HelixBase.cxx.

PathLengths()

void Hal::HelixBase::PathLengths	(	const HelixBase &	h,
		Double_t &	s1,
		Double_t &	s2 ) const

return path lendhts at shortest distance between two helices

Parameters

h	secon helix
s1	path lenght ot this helix
s2	path lenght of h-helix

Definition at line 392 of file HelixBase.cxx.

SetMagField()

void Hal::HelixBase::SetMagField ( Double_t Bz )

static

set magnetic fiels (for all helixes)

Parameters

Bz

Definition at line 172 of file HelixBase.cxx.

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

• features/phys/HelixBase.h
• features/phys/HelixBase.cxx