Det Class Reference

A (misaligned) detector in space. More...

#include <Det.h>

List of all members.

Public Member Functions
	Det (int ID, double Width, double Length, double Thickness, double PitchX, double PitchY)
	Recommended constructor.
const double	GetWidth () const
	width of a module (perpendicular to strips, local x)
const double	GetLength () const
	length of a module (along strips, local y)
const double	GetThickness () const
	thickness of a module (local z)
const double	GetPitchX () const
	the strip pitch of a module (sensitive coordinate along x)
const double	GetPitchY () const
	the stereo coordinate distance, i.e. y distance of crossings
const double	GetResolutionX () const
	detector resolution along x
const double	GetResolutionY () const
	detector resolution along y
const double	GetRadiationLength () const
	detector radiation length in cm
int	GetID () const
	Detector ID.
const ReferenceFrame &	GetNominal () const
	Return the nominal frame (i.e. where the detector is supposed to be)
const ReferenceFrame &	GetMisalignDelta () const
	Return difference from nominal frame to real (misaligned frame)
const ReferenceFrame &	GetMisalign () const
	Return absolute misaligned frame (nominal position + delta due to misalignment)
const ReferenceFrame &	GetAlignDelta () const
	Return difference from nominal to aligned frame.
const ReferenceFrame &	GetAlign () const
	Return absolute aligned frame (nominal position + computed alignment correction)
bool	InsideBounds (CLHEP::HepVector local) const
	Check if the given hit (in local coordinates) is inside detector volume.
CLHEP::HepVector	MeasuredIntersection (CLHEP::HepVector trueIntersection) const
	Get measured intersection assuming nominal position for detector.
void	SetNominalFrame (ReferenceFrame nominal)
	Set nominal frame (where the detector should be, ideal geometry)
void	SetMisalignFrame (ReferenceFrame misalignDelta)
	Set misaligned frame (You have to give the DELTA to the nominal frame)
void	SetAlignFrame (ReferenceFrame alignDelta)
	Set aligned frame (You have to give the DELTA to the nominal frame)
Protected Attributes
int	fID
	internal number of module, module "ID"
double	fWidth
	Detector width (x-coordinate)
double	fLength
	Detector length (y-coordinate)
double	fThickness
	Detector thickness (z-coordinate)
double	fPitchX
	Pitch in x coordinate (along "width")
double	fPitchY
	Pitch in y coordinate (along "length")
ReferenceFrame	fNominal
ReferenceFrame	fMisalignDelta
ReferenceFrame	fAlignDelta
ReferenceFrame	fMisalign
ReferenceFrame	fAlign

---

Detailed Description

A (misaligned) detector in space.

It consists of three locations: The nominal position of the object (where it is expected to be), the true (generated) misalignment, and the computed alignment. The two members fMisalignDelta and fAlignDelta are no real reference frames, but rather store additional rotation and position that have to be applied additionally to the nominal to get the misaligned and aligned frame, respectively.

The two members fMisalign and fAlign contain the combination done in the Karimaki way of the nominal plus the applied delta. They are updated each time SetMisalignDeltaFrame or SetAlignDeltaFrame is called.

---

Constructor & Destructor Documentation

Det::Det	(	int	ID,
		double	Width,
		double	Length,
		double	Thickness,
		double	PitchX,
		double	PitchY
	)

Recommended constructor.

You should use this constructor only.

---

Member Function Documentation

const double Det::GetRadiationLength

(

)

const

detector radiation length in cm

Get radiation length (in cm)

Material is assumed to be silicon.

bool Det::InsideBounds

(

CLHEP::HepVector

local

)

const

Check if the given hit (in local coordinates) is inside detector volume.

Boundary checking: Is a point in the detector? returns true if the point is in the detector, else false

HepVector Det::MeasuredIntersection

(

CLHEP::HepVector

trueIntersection

)

const

Get measured intersection assuming nominal position for detector.

Convert the true intersection in the one that would be measured because the misalignment is not known.

Get from real misaligned state the intersection that would be measured if the misaligned state is not known, i.e. regarding only nominal position / rotation.

void Det::SetAlignFrame

(

ReferenceFrame

alignDelta

)

Set aligned frame (You have to give the DELTA to the nominal frame)

Set aligned frame.

This sets both the delta (that you supply) and combines it with the nominal frame.

void Det::SetMisalignFrame

(

ReferenceFrame

misalignDelta

)

Set misaligned frame (You have to give the DELTA to the nominal frame)

Set misaligned frame.

This sets both the delta (that you supply) and combines it with the nominal frame.

void Det::SetNominalFrame

(

ReferenceFrame

nominal

)

Set nominal frame (where the detector should be, ideal geometry)

Set nominal frame.

This also recalculates the misaligned and aligned frame corresponding to the given delta frames.

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

• /home/mweber/Dokumente/CMS/Alignment/kalmanalignment/trunk/simulation/Det.h
• /home/mweber/Dokumente/CMS/Alignment/kalmanalignment/trunk/simulation/Det.cc