LVL1::JemMappingTool Class Reference

JEM crate/module/channel to eta/phi/layer mappings. More...

#include <JemMappingTool.h>

Inheritance diagram for LVL1::JemMappingTool:

Collaboration diagram for LVL1::JemMappingTool:

Public Member Functions
virtual StatusCode	initialize () override
virtual StatusCode	finalize () override
virtual bool	mapping (int crate, int module, int channel, double &eta, double &phi, int &layer) const override
	Return eta, phi and layer mapping for given crate/module/channel.
virtual bool	mapping (double eta, double phi, int layer, int &crate, int &module, int &channel) const override
	Return crate, module and channel mapping for given eta/phi/layer.

Private Attributes
std::vector< double >	m_etasNegative
std::vector< double >	m_granNegative
std::vector< double >	m_etasPositive
std::vector< double >	m_granPositive
std::vector< int >	m_negChans
std::vector< int >	m_posChans

Static Private Attributes
static const int	s_crates = 2
static const int	s_modules = 16
static const int	s_channels = 44
static const int	s_modulesPerQuadrant = 8
static const int	s_extremeNegModule = 0
static const int	s_extremePosModule = 7
static const int	s_etaBinsPerRow = 4
static const double	s_phiGran = M_PI/16.
static const double	s_etaGran = 0.2

Detailed Description

JEM crate/module/channel to eta/phi/layer mappings.

Layer indicates core/overlap

Source: "ATLAS Level-1 Calorimeter Trigger: Jet/Energy Processor Module, Project Specification" version 1.0 The remappings at extreme eta are from a private communication from Steve Hillier.

Author

Peter Faulkner

Definition at line 33 of file JemMappingTool.h.

Member Function Documentation

finalize()

StatusCode LVL1::JemMappingTool::finalize ( )

overridevirtual

Definition at line 62 of file JemMappingTool.cxx.

{
 
  return StatusCode::SUCCESS;
}

initialize()

StatusCode LVL1::JemMappingTool::initialize ( )

overridevirtual

Definition at line 33 of file JemMappingTool.cxx.

{
  msg(MSG::INFO) << "Initializing " << name() << endmsg;
 
  // Initialise extreme eta data vectors
  const double etasNeg[s_etaBinsPerRow] = {-4.05, -3.05, -2.8, -2.55 };
  const double granNeg[s_etaBinsPerRow] = { 1.7,   0.3,   0.2,  0.3  };
  const double etasPos[s_etaBinsPerRow] = { 2.55,  2.8,   3.05, 4.05 };
  const double granPos[s_etaBinsPerRow] = { 0.3,   0.2,   0.3,  1.7  };
  m_etasNegative.assign(etasNeg, etasNeg + s_etaBinsPerRow);
  m_granNegative.assign(granNeg, granNeg + s_etaBinsPerRow);
  m_etasPositive.assign(etasPos, etasPos + s_etaBinsPerRow);
  m_granPositive.assign(granPos, granPos + s_etaBinsPerRow);
 
  // Initialise extreme eta channel remapping vectors
  const int negChans[s_channels] = { 1,-1, 2, 3, -1,-1, 6, 7,  0,36,10,11,
                                     5, 9,14,15, 17,13,18,19,  4,12,22,23,
                        28,20,26,27, 21,25,30,31, 33,29,34,35,
                        37,41,38,39, -1,-1,42,43 };
  const int posChans[s_channels] = { 0, 1, 2,-1,  4, 5,-1,-1,  8, 9, 3,39,
                                    12,13, 6,10, 16,17,18,14, 20,21, 7,15,
                        24,25,31,23, 28,29,22,26, 32,33,34,30,
                        36,37,38,42, 40,41,-1,-1 };
  m_negChans.assign(negChans, negChans + s_channels);
  m_posChans.assign(posChans, posChans + s_channels);
 
  return StatusCode::SUCCESS;
}

mapping() [1/2]

bool LVL1::JemMappingTool::mapping ( double eta, double phi, int layer, int & crate, int & module, int & channel ) const

overridevirtual

Return crate, module and channel mapping for given eta/phi/layer.

Definition at line 119 of file JemMappingTool.cxx.

{
  // Not implemented
  crate   = 0;
  module  = 0;
  channel = 0;
  return false;
}

mapping() [2/2]

bool LVL1::JemMappingTool::mapping ( int crate, int module, int channel, double & eta, double & phi, int & layer ) const

overridevirtual

Return eta, phi and layer mapping for given crate/module/channel.

Definition at line 70 of file JemMappingTool.cxx.

{
  if (crate < 0 || crate >= s_crates || module < 0 || module >= s_modules ||
      channel < 0 || channel >= s_channels) return false;
 
  // Channel remapping needed at extreme eta
 
  int chan = channel;
  const int quadMod = module % s_modulesPerQuadrant;
  if      (quadMod == s_extremeNegModule) chan = m_negChans[channel];
  else if (quadMod == s_extremePosModule) chan = m_posChans[channel];
  if (chan < 0) return false;
  const int etaBin = chan % s_etaBinsPerRow;
  const int phiBin = chan / s_etaBinsPerRow - 1;  // allow for overlap
 
  // Phi granularity doubles at FCAL
 
  constexpr double twoPi   = 2. * M_PI;
  const double phiBase =
    M_PI_2 * static_cast<double>(crate)
    + M_PI * static_cast<double>(module / s_modulesPerQuadrant);
  phi = phiBase + s_phiGran * (static_cast<double>(phiBin) + 0.5);
  if (((quadMod == s_extremeNegModule) && (etaBin == 0)) ||
      ((quadMod == s_extremePosModule) && (etaBin == s_etaBinsPerRow - 1))) {
    if (chan < s_etaBinsPerRow) phi -= s_phiGran / 2.;
    else                        phi += s_phiGran / 2.;
  }
  if      (phi < 0.)     phi += twoPi;
  else if (phi >= twoPi) phi -= twoPi;
 
  // Eta granularity varies at endcap/FCAL
 
  if      (quadMod == s_extremeNegModule) eta = m_etasNegative[etaBin];
  else if (quadMod == s_extremePosModule) eta = m_etasPositive[etaBin];
  else {
    const double etaBase = s_etaGran * s_etaBinsPerRow
                                     * (quadMod - s_modulesPerQuadrant/2);
    eta = etaBase + s_etaGran * (double(etaBin) + 0.5);
  }
 
  // Set layer to 1 for overlap channel, 0 for core
  layer = (phiBin < 0 || phiBin > 7) ? 1 : 0;
 
  return true;
}

Member Data Documentation

m_etasNegative

std::vector<double> LVL1::JemMappingTool::m_etasNegative

private

Definition at line 65 of file JemMappingTool.h.

m_etasPositive

std::vector<double> LVL1::JemMappingTool::m_etasPositive

private

Definition at line 67 of file JemMappingTool.h.

m_granNegative

std::vector<double> LVL1::JemMappingTool::m_granNegative

private

Definition at line 66 of file JemMappingTool.h.

m_granPositive

std::vector<double> LVL1::JemMappingTool::m_granPositive

private

Definition at line 68 of file JemMappingTool.h.

m_negChans

std::vector<int> LVL1::JemMappingTool::m_negChans

private

Definition at line 71 of file JemMappingTool.h.

m_posChans

std::vector<int> LVL1::JemMappingTool::m_posChans

private

Definition at line 72 of file JemMappingTool.h.

s_channels

const int LVL1::JemMappingTool::s_channels = 44

staticprivate

Definition at line 54 of file JemMappingTool.h.

s_crates

const int LVL1::JemMappingTool::s_crates = 2

staticprivate

Definition at line 52 of file JemMappingTool.h.

s_etaBinsPerRow

const int LVL1::JemMappingTool::s_etaBinsPerRow = 4

staticprivate

Definition at line 59 of file JemMappingTool.h.

s_etaGran

const double LVL1::JemMappingTool::s_etaGran = 0.2

staticprivate

Definition at line 62 of file JemMappingTool.h.

s_extremeNegModule

const int LVL1::JemMappingTool::s_extremeNegModule = 0

staticprivate

Definition at line 57 of file JemMappingTool.h.

s_extremePosModule

const int LVL1::JemMappingTool::s_extremePosModule = 7

staticprivate

Definition at line 58 of file JemMappingTool.h.

s_modules

const int LVL1::JemMappingTool::s_modules = 16

staticprivate

Definition at line 53 of file JemMappingTool.h.

s_modulesPerQuadrant

const int LVL1::JemMappingTool::s_modulesPerQuadrant = 8

staticprivate

Definition at line 56 of file JemMappingTool.h.

s_phiGran

const double LVL1::JemMappingTool::s_phiGran = M_PI/16.

staticprivate

Definition at line 61 of file JemMappingTool.h.

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

• JemMappingTool.h
• JemMappingTool.cxx