PixelSensorSD Class Reference

#include <PixelSensorSD.h>

Inheritance diagram for PixelSensorSD:

Collaboration diagram for PixelSensorSD:

Public Member Functions
	PixelSensorSD (const std::string &name, const std::string &hitCollectionName)
G4bool	ProcessHits (G4Step *, G4TouchableHistory *) override final
void	Initialize (G4HCofThisEvent *) override final
template<class... Args>
void	AddHit (Args &&... args)
	Templated method to stuff a single hit into the sensitive detector class. More...

Private Member Functions
	FRIEND_TEST (PixelSensorSDtest, ProcessHits)
	FRIEND_TEST (PixelSensorSDtest, AddHit)

Private Attributes
std::string	m_HitCollName
SiHitCollection *	m_HitColl {nullptr}

Detailed Description

Definition at line 26 of file PixelSensorSD.h.

Constructor & Destructor Documentation

PixelSensorSD()

PixelSensorSD::PixelSensorSD	(	const std::string &	name,
		const std::string &	hitCollectionName
	)

Definition at line 33 of file PixelSensorSD.cxx.

  : G4VSensitiveDetector( name )
  , m_HitCollName( hitCollectionName )
{
}

Member Function Documentation

AddHit()

template<class... Args>

void PixelSensorSD::AddHit ( Args &&...  args )

inline

Templated method to stuff a single hit into the sensitive detector class.

This could get rather tricky, but the idea is to allow fast simulations to use the very same SD classes as the standard simulation.

Definition at line 43 of file PixelSensorSD.h.

{ m_HitColl->Emplace( args... ); }

FRIEND_TEST() [1/2]

PixelSensorSD::FRIEND_TEST ( PixelSensorSDtest  , AddHit    )

private

FRIEND_TEST() [2/2]

PixelSensorSD::FRIEND_TEST ( PixelSensorSDtest  , ProcessHits    )

private

Initialize()

void PixelSensorSD::Initialize ( G4HCofThisEvent *  )

finaloverride

Definition at line 41 of file PixelSensorSD.cxx.

{
  // ISF calls G4SDManager::PrepareNewEvent() before the Geant4 event loop starts...
  if(auto* eventManger = G4EventManager::GetEventManager()){
    if(auto* eventInfo = static_cast<AtlasG4EventUserInfo*>(eventManger->GetUserInformation())){
      m_HitColl = eventInfo->GetHitCollectionMap()->Find<SiHitCollection>(m_HitCollName);
    }
  }
}

ProcessHits()

G4bool PixelSensorSD::ProcessHits ( G4Step *  aStep, G4TouchableHistory *    )

finaloverride

Definition at line 53 of file PixelSensorSD.cxx.

{
  if (verboseLevel>5) G4cout << "Process Hit" << G4endl;
 
  G4double edep = aStep->GetTotalEnergyDeposit();
  edep *= CLHEP::MeV;
  if(edep==0.) {
    if(aStep->GetTrack()->GetDefinition() != G4Geantino::GeantinoDefinition() &&
       aStep->GetTrack()->GetDefinition() != G4ChargedGeantino::ChargedGeantinoDefinition())
      return false;
  }
 
  //use the global time. i.e. the time from the beginning of the event
  //
  // Get the Touchable History:
  //
  const G4TouchableHistory *myTouch = dynamic_cast<const G4TouchableHistory*>(aStep->GetPreStepPoint()->GetTouchable());
  if (not myTouch) {
    G4cout << "PixelSensorSD::ProcessHits bad dynamic_cast" << G4endl;
    return false;
  }
  if(verboseLevel>5){
    for (int i=0;i<myTouch->GetHistoryDepth();i++){
      std::string detname=myTouch->GetVolume(i)->GetLogicalVolume()->GetName();
      int copyno=myTouch->GetVolume(i)->GetCopyNo();
      G4cout << "Volume " <<detname <<" Copy Nr. " << copyno << G4endl;
    }
  }
  //
  // Get the hit coordinates. Start and End Point
  //
  G4ThreeVector coord1 = aStep->GetPreStepPoint()->GetPosition();
  G4ThreeVector coord2 = aStep->GetPostStepPoint()->GetPosition();
 
  // Calculate the local step begin and end position.
  // From a G4 FAQ:
  // http://geant4-hn.slac.stanford.edu:5090/HyperNews/public/get/geometry/17/1.html
  //
  const G4AffineTransform transformation = myTouch->GetHistory()->GetTopTransform();
  G4ThreeVector localPosition1 = transformation.TransformPoint(coord1);
  G4ThreeVector localPosition2 = transformation.TransformPoint(coord2);
 
  HepGeom::Point3D<double> lP1,lP2;
  lP1[SiHit::xEta] = localPosition1[2]*CLHEP::mm;
  lP1[SiHit::xPhi] = localPosition1[1]*CLHEP::mm;
  lP1[SiHit::xDep] = localPosition1[0]*CLHEP::mm;
 
  lP2[SiHit::xEta] = localPosition2[2]*CLHEP::mm;
  lP2[SiHit::xPhi] = localPosition2[1]*CLHEP::mm;
  lP2[SiHit::xDep] = localPosition2[0]*CLHEP::mm;
 
  //
  // Get it into a vector in local coords and with the right units:
 
 
  // Now Navigate the history to know in what detector the step is:
  // and finally set the ID of det element in which the hit is.
  //
  //G4int History;
  //
  // Is it TB, barrel or endcap?
  //
  int BrlEcap = 0;
  int LayerDisk = 0;
  int etaMod = 0;
  int phiMod = 0;
  int side = 0;
 
  //   G4VPhysicalVolume* TheVolume = myTouch->GetVolume();
  //
  // In the case of the TB the positioning integers won't be initialized
  // and the identifying integer will be zero. There is no need to do
  // anything else
 
  int BEcopyNo =  myTouch->GetVolume()->GetCopyNo();
 
  // Barrel
  if(BEcopyNo == 100) {
    // Move up of one level in the tree to get the module number:
    //
    etaMod = myTouch->GetVolume(1)->GetCopyNo();
    //
    // Another level for the ladder
    //
    phiMod = myTouch->GetVolume(2)->GetCopyNo();
    //
    // Another one for the layer
    //
    LayerDisk = myTouch->GetVolume(3)->GetCopyNo();
    //
    // Some printout
    //
    if (verboseLevel>5){
      G4cout << "In the Pixel Barrel" << G4endl;
      G4cout << "----- Phi Module # " << phiMod << G4endl;
      G4cout << "----- Eta Ladder # " << etaMod << G4endl;
      G4cout << "----- Layer      # " << LayerDisk << G4endl;
    }
 
    // Standard ATLAS EndCap
  } else if (BEcopyNo == 200) {
 
    // Use the copy no. to get the id:
    phiMod = myTouch->GetVolume(1)->GetCopyNo();
    if (phiMod == 48) phiMod = 0;
 
    // etaMod always 0.
 
    // Move up of one level in the tree to get the disk number:
    LayerDisk = myTouch->GetVolume(2)->GetCopyNo();
 
    // Move up of one level in the tree to get the EC number:
    BrlEcap = myTouch->GetVolume(3)->GetCopyNo();
    //The following is no longer necessary
    //if(BrlEcap == -2) BrlEcap = 1;
 
    // Workaround for bug in cosmic setup
    if (BrlEcap == 0) {
      BrlEcap = (coord1.z() > 0) ? 2 : -2;
    }
 
    // Some printout
    if (verboseLevel>5){
      G4cout << "In the Pixel EndCap" << G4endl;
      G4cout << "----- PhiModule # " << phiMod << G4endl;
      G4cout << "----- Disk #      " << LayerDisk << G4endl;
      G4cout << "----- Endcap #    " << BrlEcap << G4endl;
    }
 
    // SLHC EndCap
  } else if (BEcopyNo == 300) {
 
    // Use the copy no. to get the id:
    phiMod = myTouch->GetVolume(1)->GetCopyNo();
 
    // Note: copyNo is 2*ieta for front face, 2*ieta+1 for back face
    etaMod = myTouch->GetVolume(2)->GetCopyNo()/2;
 
    // Move up of one level in the tree to get the disk number:
    LayerDisk = myTouch->GetVolume(3)->GetCopyNo();
 
    // Move up of one level in the tree to get the EC number:
    BrlEcap = myTouch->GetVolume(4)->GetCopyNo();
    //if(BrlEcap == -2) BrlEcap = 1;
 
    // Some printout
    if (verboseLevel>5){
      G4cout << "In the SLHC Pixel EndCap" << G4endl;
      G4cout << "----- PhiModule # " << phiMod << G4endl;
      G4cout << "----- Ring/Eta #  " << etaMod << G4endl;
      G4cout << "----- Disk #      " << LayerDisk << G4endl;
      G4cout << "----- Endcap #    " << BrlEcap << G4endl;
    }
 
  } else if(BEcopyNo == 400) { //DBM
 
    // Note: there is one volume (3-layers unit) contain the diamond+chip volume
    // so one increment is needed after 'layerDisk'
 
    // only one eta module for the DBM
    etaMod = 0;
 
    // Move up one level to get the layer number, 3 layers per telescope
    LayerDisk = myTouch->GetVolume(1)->GetCopyNo();
 
    // Move up two level to get the phi module, azimuthal position of telescope
    phiMod = myTouch->GetVolume(3)->GetCopyNo();
 
    // Move up one level to get the DBM side, A side or C side
    BrlEcap = myTouch->GetVolume(4)->GetCopyNo();
 
    // Some printout
    if (verboseLevel>5){
      G4cout << "In the DBM" << G4endl;
      G4cout << "----- PhiModule # " << phiMod << G4endl;
      G4cout << "----- Ring/Eta #  " << etaMod << G4endl;
      G4cout << "----- Disk #      " << LayerDisk << G4endl;
      G4cout << "----- Endcap #    " << BrlEcap << G4endl;
    }
 
  } else if(BEcopyNo == 500) { //Inclined
 
    std::string volName = myTouch->GetVolume()->GetName();
 
    // split the volname vs '_'
    std::replace(volName.begin(),volName.end(),'_',' ');
 
    std::vector<std::string> v;
    std::istringstream s(volName);
    std::string tmp;
    while (s >> tmp) {
      v.push_back(tmp);
    }
 
    BrlEcap = 0;   // no endcap defined in alpine
    LayerDisk = atoi(v[1].c_str());
    phiMod = atoi(v[2].c_str());
    etaMod = atoi(v[3].c_str());
 
    if (verboseLevel>5){
      G4cout << "Volume name " << volName <<G4endl;
      double xpos = coord1.x();
      double ypos = coord1.y();
      double zpos = coord1.z();
      double r = sqrt(xpos*xpos+ypos*ypos);
      G4cout << "In the Alpine " << G4endl;
      G4cout << "----- PhiModule # " << phiMod << G4endl;
      G4cout << "----- Ring/Eta #  " << etaMod << G4endl;
      G4cout << "----- Disk #      " << LayerDisk << G4endl;
      G4cout << "----- Endcap #    " << BrlEcap << G4endl;
      G4cout << "----- Pos        # " << r<<"  "<<zpos << G4endl;
      G4cout << "----- volume  " << myTouch->GetVolume()->GetName()<< G4endl;
      G4cout << "  " << myTouch->GetVolume(1)->GetName()<<" "<<
        myTouch->GetVolume(2)->GetName()<< "  " << myTouch->GetVolume(3)->GetName()<<G4endl;
    }
 
  } else if(BEcopyNo == 600) { //ITk ECring
 
    std::string volName = myTouch->GetVolume()->GetName();
 
    // split the volname vs '_'
    std::replace(volName.begin(),volName.end(),'_',' ');
 
    std::vector<std::string> v;
    std::istringstream s(volName);
    std::string tmp;
    while (s >> tmp) {
      v.push_back(tmp);
    }
 
    BrlEcap = atoi(v[1].c_str());
    LayerDisk = atoi(v[2].c_str());
    phiMod = atoi(v[3].c_str());
    etaMod = atoi(v[4].c_str());
 
    if (verboseLevel>5){
      double xpos = coord1.x();
      double ypos = coord1.y();
      double zpos = coord1.z();
      double r = sqrt(xpos*xpos+ypos*ypos);
      G4cout << "Volume name " << volName <<G4endl;
      G4cout << "In the ITk EC ring " << G4endl;
      G4cout << "----- PhiModule # " << phiMod << G4endl;
      G4cout << "----- Ring/Eta #  " << etaMod << G4endl;
      G4cout << "----- Disk #      " << LayerDisk << G4endl;
      G4cout << "----- Endcap #    " << BrlEcap << G4endl;
      G4cout << "----- Pos        # " << r<<"  "<<zpos << G4endl;
      G4cout << "----- volume  " << myTouch->GetVolume()->GetName()<< G4endl;
      G4cout << "  " << myTouch->GetVolume(1)->GetName()<<" "<<
        myTouch->GetVolume(2)->GetName()<< "  " << myTouch->GetVolume(3)->GetName()<<G4endl;
    }
  }
  else {
    // Do not expect other numbers. Need to fix PixelGeoModel if this occurs.
    G4ExceptionDescription description;
    description << "ProcessHits: Unrecognized geometry in Pixel sensitive detector. Please contact the maintainer of the Pixel Detector Description.";
    description << "If you are processing a GeoModelXML geometry, please ensure a PixelSensorGmxSD instance is used instead of this (PixelSensorSD).";
    G4Exception("PixelSensorSD", "UnrecognizedPixelGeometry", FatalException, description);
    abort();
  }
 
  // get the HepMcParticleLink from the TrackHelper
 
  TrackHelper trHelp(aStep->GetTrack());
  // Temporary solution to get EventContext from a Geant4 thread 
  EventContext const* eventContext{nullptr};
  if(auto* eventInfo = AtlasG4EventUserInfo::GetEventUserInfo()){
    eventContext = &eventInfo->GetEventContext();
  }
 
  m_HitColl->Emplace(lP1,
                     lP2,
                     edep,
                     aStep->GetPreStepPoint()->GetGlobalTime(),
                     eventContext ? trHelp.GenerateParticleLink(*eventContext) : trHelp.GenerateParticleLink(),
                     0,BrlEcap,LayerDisk,etaMod,phiMod,side);
  return true;
}

Member Data Documentation

m_HitColl

SiHitCollection* PixelSensorSD::m_HitColl {nullptr}

private

Definition at line 48 of file PixelSensorSD.h.

m_HitCollName

std::string PixelSensorSD::m_HitCollName

private

Definition at line 47 of file PixelSensorSD.h.

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

• PixelSensorSD.h
• PixelSensorSD.cxx