DTDigiSyncTOFCorr Class Reference

#include <DTDigiSyncTOFCorr.h>

Inheritance diagram for DTDigiSyncTOFCorr:

Public Member Functions
virtual double	digitizerOffset (const DTWireId *id, const DTLayer *layer=0) const
	Delays to be added to digi times during digitization, in ns. More...
	DTDigiSyncTOFCorr (const edm::ParameterSet &)
	Constructor. More...
virtual double	emulatorOffset (const DTWireId *id) const
	Offset to obtain "raw" TDCs for the L1 emulator from digis. More...
virtual	~DTDigiSyncTOFCorr ()
	Destructor. More...
Public Member Functions inherited from DTDigiSyncBase
	DTDigiSyncBase ()
	Constructor. More...
virtual	~DTDigiSyncBase ()
	Destructor. More...

Private Attributes
int	corrType
double	theOffset

Detailed Description

Digi offset computed as:
t0 = Tcommon - aTOF

where Tcommon is a fixed offset defined in
DTDigiSyncTOFCorr:offset (in ORCA the default was = 500 ns)

and aTOF is set according to MuBarDigiSyncTOFCorr:TOFCorrection:
0: no TOF correction (aTOF=0)
1: aTOF = the TOF of an infinite-momentum particle travelling from the nominal IP to the 3D center of the chamber
2: ditto, but for a particle travelling to the 3D center of the wire. (This mode is avaliable for comparison with older data which were produced in this way) 3: aTOF = the TOF of an infinite-momentum particle travelling from the nominal IP to the 3D center of the SL. Use this, unless you really know what you are doing.

Date:

2010/07/16 14:44:04

Revision:

1.4

Author

N. Amapane, R. Bellan - INFN Torino

Definition at line 33 of file DTDigiSyncTOFCorr.h.

Constructor & Destructor Documentation

DTDigiSyncTOFCorr::DTDigiSyncTOFCorr

(

const edm::ParameterSet &

pSet

)

Constructor.

Definition at line 20 of file DTDigiSyncTOFCorr.cc.

References edm::ParameterSet::getParameter().

                                                               {
  
  theOffset = pSet.getParameter<double>("offset"); //500ns
  corrType = pSet.getParameter<int>("TOFCorrection"); //1
}

DTDigiSyncTOFCorr::~DTDigiSyncTOFCorr ( )

virtual

Destructor.

Definition at line 27 of file DTDigiSyncTOFCorr.cc.

{}

Member Function Documentation

double DTDigiSyncTOFCorr::digitizerOffset ( const DTWireId *  id, const DTLayer *  layer = 0  ) const

virtual

Delays to be added to digi times during digitization, in ns.

Implements DTDigiSyncBase.

Definition at line 31 of file DTDigiSyncTOFCorr.cc.

References DTLayer::chamber(), gather_cfg::cout, PV3DBase< T, PVType, FrameType >::mag(), evf::evtn::offset(), GloballyPositioned< T >::position(), DTLayer::specificTopology(), DTLayer::superLayer(), GeomDet::surface(), Surface::toGlobal(), DTWireId::wire(), and DTTopology::wirePosition().

                                                                                         {

  double offset = theOffset;
  const double cSpeed = 29.9792458; // cm/ns

  if (corrType==1) {
    // Subtraction of assumed TOF, per CHAMBER
    double flightL = layer->chamber()->surface().position().mag();
    offset -= flightL/cSpeed;
  } else if (corrType==2) {
    // Subtraction of assumed TOF, per WIRE 

    // Position of the wire in the Layer's reference frame
    float localXPos = layer->specificTopology().wirePosition(id->wire());
    LocalPoint localPos(localXPos,0,0); 

    // Distance of the wire to the CMS's I.P.
    double flightL = layer->surface().toGlobal(localPos).mag();

    offset -= flightL/cSpeed;

  } else if (corrType==3) {
    // Subtraction of assumed TOF, per SUPERLAYER
    double flightL = layer->superLayer()->surface().position().mag();
    offset -= flightL/cSpeed;
  } else if (corrType!=0){
    cout << "ERROR: SimMuon:DTDigitizer:DTDigiSyncTOFCorr:TOFCorrection = " << corrType
     << "is not defined " << endl; 
  }
  return offset;
}

double DTDigiSyncTOFCorr::emulatorOffset ( const DTWireId *  id ) const

virtual

Offset to obtain "raw" TDCs for the L1 emulator from digis.

Implements DTDigiSyncBase.

Definition at line 65 of file DTDigiSyncTOFCorr.cc.

                                                                  {
  return theOffset;
}

Member Data Documentation

int DTDigiSyncTOFCorr::corrType

private

Definition at line 49 of file DTDigiSyncTOFCorr.h.

double DTDigiSyncTOFCorr::theOffset

private

Definition at line 48 of file DTDigiSyncTOFCorr.h.