CSCChannelMapperStartup Class Reference

#include <CSCChannelMapperStartup.h>

Inheritance diagram for CSCChannelMapperStartup:

Public Member Functions
int	channelFromStrip (const CSCDetId &id, int strip) const override
	CSCChannelMapperStartup ()
int	geomStripChannel (const CSCDetId &id, int iraw) const override
	Return geometrical strip channel number for input raw channel number. More...
std::string	name () const override
CSCDetId	rawCSCDetId (const CSCDetId &id) const override
int	rawStripChannel (const CSCDetId &id, int igeom) const override
	Return raw strip channel number for input geometrical channel number. More...
	~CSCChannelMapperStartup () override
Public Member Functions inherited from CSCChannelMapperBase
	CSCChannelMapperBase ()
int	geomAnodeChannel (const CSCDetId &id, int iraw) const
	Alias for geomWireChannel. More...
int	geomCathodeChannel (const CSCDetId &id, int iraw) const
	Alias for geomStripChannel. More...
int	geomWireChannel (const CSCDetId &id, int iraw) const
	Return geometrical wiregroup channel number for input raw channel number. More...
int	rawAnodeChannel (const CSCDetId &id, int igeom) const
	Alias for rawWireChannel. More...
int	rawCathodeChannel (const CSCDetId &id, int igeom) const
	Alias for rawStripChannel. More...
int	rawWireChannel (const CSCDetId &id, int igeom) const
	Return raw wiregroup channel number for input geometrical channel number. More...
virtual	~CSCChannelMapperBase ()

Detailed Description

A concrete CSCChannelMapper class to map between raw/online channel numbers (for strips/cathodes and wires/anodes) and offline geometry-oriented channel numbers, in which increasing number corresponds to increasing local x (strips) or y (wire groups) as defined in CMS Note CMS IN-2007/024.

This version is for CMS Startup (2008-2013)

1. Sorts out readout-flipping within the two endcaps for ME1a and ME1b strip channels.
   
2. Maps the ME1a channels from online labels 65-80 to offline 1-16.
   
3. Does nothing with wiregroup channels; the output = the input.
   

Since ME1a is ganged, the 48 strips in ME1a are fed to 16 channels, so it is important to distinguish the nomenclatures "strip" vs "channel". It is usually a meaningful distinction!

Also note that the CSCDetId for ME11 and ME1b is identical. Offline we presume ring=1 of station 1 to mean the ME1b strips. We use the identifier ring=4 to denote the ME1a strips.

Author

Tim Cox

Definition at line 34 of file CSCChannelMapperStartup.h.

Constructor & Destructor Documentation

CSCChannelMapperStartup()

CSCChannelMapperStartup::CSCChannelMapperStartup ( )

inline

Definition at line 36 of file CSCChannelMapperStartup.h.

{}

~CSCChannelMapperStartup()

CSCChannelMapperStartup::~CSCChannelMapperStartup ( )

inlineoverride

Definition at line 37 of file CSCChannelMapperStartup.h.

{}

Member Function Documentation

channelFromStrip()

int CSCChannelMapperStartup::channelFromStrip ( const CSCDetId &  id, int  strip  ) const

overridevirtual

Offline conversion of a strip (geometric labelling) back to channel (Startup: convert the 48 strips of ME1A to 16 ganged channels.)

Implements CSCChannelMapperBase.

Definition at line 52 of file CSCChannelMapperStartup.cc.

                                                                                 {
  // This just returns the electronics channel label to which a given strip is
  // connected In all chambers but ME1A this is just a direct 1-1
  // correspondence. In ME1A the 48 strips are ganged into 16 channels:
  // 1+17+33->1, 2+18+34->2, ... 16+32+48->16.
  int ichan = strip;
  bool me1a = (id.station() == 1) && (id.ring() == 4);
  if (me1a && strip > 16)
    ichan = (strip - 1) % 16 + 1;  // gang the 48 to 16
  return ichan;
}

References relativeConstraints::ring, and digitizers_cfi::strip.

geomStripChannel()

int CSCChannelMapperStartup::geomStripChannel ( const CSCDetId &  id, int  iraw  ) const

overridevirtual

Return geometrical strip channel number for input raw channel number.

Implements CSCChannelMapperBase.

Definition at line 27 of file CSCChannelMapperStartup.cc.

                                                                                {
  // Translate a raw strip channel in range 1-80, iraw,  into
  // corresponding geometry-oriented channel in which increasing
  // channel number <-> strip number increasing with +ve local x.
 
  int igeo = iraw;
 
  bool zplus = (id.endcap() == 1);
  bool me11 = (id.station() == 1) && (id.ring() == 1);
  bool me1a = me11 && (iraw > 64);
  bool me1b = me11 && (iraw <= 64);
 
  if (me1a)
    igeo -= 64;  // 65-80 -> 1-16
  // if ( me1a ) igeo %= 64; // 65-80 -> 1-16
  if (me1a && zplus) {
    igeo = 17 - igeo;
  }  // 65-80 -> 16-1
  if (me1b && !zplus) {
    igeo = 65 - igeo;
  }  // 1-64 -> 64-1
 
  return igeo;
}

References relativeConstraints::ring, and SurfaceOrientation::zplus.

name()

std::string CSCChannelMapperStartup::name ( ) const

inlineoverridevirtual

Reimplemented from CSCChannelMapperBase.

Definition at line 39 of file CSCChannelMapperStartup.h.

{ return "CSCChannelMapperStartup"; }

Referenced by config.CFG::__str__(), validation.Sample::digest(), and VIDSelectorBase.VIDSelectorBase::initialize().

rawCSCDetId()

CSCDetId CSCChannelMapperStartup::rawCSCDetId ( const CSCDetId &  id ) const

overridevirtual

Construct raw CSCDetId matching supplied offline CSCDetid (Startup: return the ME11 CSCDetID when supplied with that for ME1A)

Implements CSCChannelMapperBase.

Definition at line 64 of file CSCChannelMapperStartup.cc.

                                                                      {
  // Return the effective online CSCDetId for given offline CSCDetId
  // That means the same one except for ME1A, which online is part of ME11
  // (channels 65-80)
  CSCDetId idraw(id);
  bool me1a = (id.station() == 1) && (id.ring() == 4);
  if (me1a)
    idraw = CSCDetId(id.endcap(), id.station(), 1, id.chamber(), id.layer());
  return idraw;
}

References relativeConstraints::chamber, makeMuonMisalignmentScenario::endcap, phase1PixelTopology::layer, relativeConstraints::ring, and relativeConstraints::station.

rawStripChannel()

int CSCChannelMapperStartup::rawStripChannel ( const CSCDetId &  id, int  igeom  ) const

overridevirtual

Return raw strip channel number for input geometrical channel number.

Implements CSCChannelMapperBase.

Definition at line 3 of file CSCChannelMapperStartup.cc.

                                                                               {
  // Translate a geometry-oriented strip channel in range 1-80, igeo,
  // into corresponding raw channel.
 
  int iraw = igeo;
 
  bool zplus = (id.endcap() == 1);
 
  bool me1a = (id.station() == 1) && (id.ring() == 4);
  bool me1b = (id.station() == 1) && (id.ring() == 1);
 
  if (me1a && zplus) {
    iraw = 17 - iraw;
  }  // 1-16 -> 16-1
  if (me1b && !zplus) {
    iraw = 65 - iraw;
  }  // 1-64 -> 64-1
  if (me1a) {
    iraw += 64;
  }  // set 1-16 to 65-80
 
  return iraw;
}

References relativeConstraints::ring, and SurfaceOrientation::zplus.