MuonG4R4::TgcSensitiveDetector Class Reference

#include <TgcSensitiveDetector.h>

Inheritance diagram for MuonG4R4::TgcSensitiveDetector:

Collaboration diagram for MuonG4R4::TgcSensitiveDetector:

Public Member Functions
	TgcSensitiveDetector (const std::string &name, const std::string &output_key, const std::string &trf_storKey, const MuonGMR4::MuonDetectorManager *detMgr)
	Constructor. More...
	~TgcSensitiveDetector ()=default
void	Initialize (G4HCofThisEvent *HCE) override final
	member functions More...
G4bool	ProcessHits (G4Step *aStep, G4TouchableHistory *ROhist) override final
bool	msgLvl (const MSG::Level lvl) const
	Test the output level. More...
MsgStream &	msg () const
	The standard message stream. More...
MsgStream &	msg (const MSG::Level lvl) const
	The standard message stream. More...
void	setLevel (MSG::Level lvl)
	Change the current logging level. More...

Private Member Functions
const MuonGMR4::TgcReadoutElement *	getReadoutElement (const G4TouchableHistory *touchHist) const
	Retrieves the matching readout element to a G4 hit. More...
Identifier	getIdentifier (const ActsGeometryContext &gctx, const MuonGMR4::TgcReadoutElement *readOutEle, const Amg::Vector3D &hitAtGapPlane, bool phiGap) const
void	initMessaging () const
	Initialize our message level and MessageSvc. More...

Private Attributes
SG::WriteHandle< xAOD::MuonSimHitContainer >	m_writeHandle
SG::ReadHandleKey< ActsTrk::DetectorAlignStore >	m_trfCacheKey
const ActsGeometryContext	m_gctx {}
	Pointer to the acts Geometry context. More...
const MuonGMR4::MuonDetectorManager *	m_detMgr {nullptr}
	Pointer to the underlying detector manager. More...
std::string	m_nm
	Message source name. More...
boost::thread_specific_ptr< MsgStream >	m_msg_tls
	MsgStream instance (a std::cout like with print-out levels) More...
std::atomic< IMessageSvc * >	m_imsg { nullptr }
	MessageSvc pointer. More...
std::atomic< MSG::Level >	m_lvl { MSG::NIL }
	Current logging level. More...
std::atomic_flag m_initialized	ATLAS_THREAD_SAFE = ATOMIC_FLAG_INIT
	Messaging initialized (initMessaging) More...

Detailed Description

Definition at line 17 of file TgcSensitiveDetector.h.

Constructor & Destructor Documentation

TgcSensitiveDetector()

MuonG4R4::TgcSensitiveDetector::TgcSensitiveDetector	(	const std::string &	name,
		const std::string &	output_key,
		const std::string &	trf_storKey,
		const MuonGMR4::MuonDetectorManager *	detMgr
	)

Constructor.

Parameters

name	Name of the Sensitive detctor / AthMessaging module
output_key	Key under which the sim hits are written into store gate
trf_storeKey	Location of the DetctorAlignmentStore holding the transformations per event
detMgr	Pointer to the run-4 detector manager

Definition at line 29 of file TgcSensitiveDetector.cxx.

                                                                                     :
    G4VSensitiveDetector{name},
    AthMessaging{name},
    m_writeHandle{output_key},
    m_trfCacheKey{trf_storeKey},
    m_detMgr{detMgr} {
    m_trfCacheKey.initialize().ignore();
}

~TgcSensitiveDetector()

MuonG4R4::TgcSensitiveDetector::~TgcSensitiveDetector ( )

default

Member Function Documentation

getIdentifier()

Identifier MuonG4R4::TgcSensitiveDetector::getIdentifier ( const ActsGeometryContext &  gctx, const MuonGMR4::TgcReadoutElement *  readOutEle, const Amg::Vector3D &  hitAtGapPlane, bool  phiGap  ) const

private

Definition at line 157 of file TgcSensitiveDetector.cxx.

                                                                                                    {
    const TgcIdHelper& idHelper{m_detMgr->idHelperSvc()->tgcIdHelper()};
    const Identifier firstChan = idHelper.channelID(readOutEle->identify(), 1, phiGap, 1);
 
    const Amg::Vector3D locHitPos{readOutEle->globalToLocalTrans(gctx, firstChan) * hitAtGapPlane};   
  
    const int gasGap = std::round(std::abs(locHitPos.z()) /  readOutEle->gasGapPitch()) + 1;
    ATH_MSG_VERBOSE("Detector element: "<<m_detMgr->idHelperSvc()->toStringDetEl(firstChan)
                  <<" locPos: "<<Amg::toString(locHitPos, 2)
                  <<" gap thickness: "<<readOutEle->gasGapPitch()
                  <<" gasGap: "<<gasGap);
 
    return idHelper.channelID(readOutEle->identify(), gasGap, phiGap, 1);
}

getReadoutElement()

const MuonGMR4::TgcReadoutElement * MuonG4R4::TgcSensitiveDetector::getReadoutElement ( const G4TouchableHistory *  touchHist ) const

private

Retrieves the matching readout element to a G4 hit.

The third volume encodes the information of the Tgc detector

We should have a string which kind of looks like av_319_impr_1_MuonR4::LogVolMuonStation_pv_190_T3E_Station2_-2_46 Of interest are only the T1E part and the last 2 numbers

Definition at line 137 of file TgcSensitiveDetector.cxx.

                                                                                                                  {
    const std::string stationVolume = touchHist->GetVolume(2)->GetName();
    const std::vector<std::string> volumeTokens = CxxUtils::tokenize(stationVolume, "_");
    const size_t nTokens{volumeTokens.size()};
    const TgcIdHelper& idHelper{m_detMgr->idHelperSvc()->tgcIdHelper()};
    const std::string stationName{volumeTokens[nTokens-4].substr(0,3)};
    const int stationEta = CxxUtils::atoi(volumeTokens[nTokens-2]);
    const int stationPhi = CxxUtils::atoi(volumeTokens[nTokens-1]);
    bool isValid{false};
    const Identifier stationId = idHelper.elementID(stationName, stationEta, stationPhi,  isValid);
    if (!isValid) {
       THROW_EXCEPTION("Failed to deduce station name from "+stationVolume);
    }
    return m_detMgr->getTgcReadoutElement(stationId);
}

Initialize()

void MuonG4R4::TgcSensitiveDetector::Initialize ( G4HCofThisEvent *  HCE )

finaloverride

member functions

Definition at line 41 of file TgcSensitiveDetector.cxx.

                                                      {
  if (m_writeHandle.isValid()) {
      ATH_MSG_VERBOSE("Simulation hit container "<<m_writeHandle.fullKey()<<" is already written");
      return;
  }
  if (!m_writeHandle.recordNonConst(std::make_unique<xAOD::MuonSimHitContainer>(),
                                    std::make_unique<xAOD::MuonSimHitAuxContainer>()).isSuccess()) {
      THROW_EXCEPTION("Failed to record "<<m_writeHandle.fullKey());
  }
  ATH_MSG_DEBUG("Output container "<<m_writeHandle.fullKey()<<" has been successfully created");
}

initMessaging()

void AthMessaging::initMessaging ( ) const

privateinherited

Initialize our message level and MessageSvc.

This method should only be called once.

Definition at line 39 of file AthMessaging.cxx.

{
  m_imsg = Athena::getMessageSvc();
  m_lvl = m_imsg ?
    static_cast<MSG::Level>( m_imsg.load()->outputLevel(m_nm) ) :
    MSG::INFO;
}

msg() [1/2]

MsgStream & AthMessaging::msg ( ) const

inlineinherited

The standard message stream.

Returns a reference to the default message stream May not be invoked before sysInitialize() has been invoked.

Definition at line 164 of file AthMessaging.h.

{
  MsgStream* ms = m_msg_tls.get();
  if (!ms) {
    if (!m_initialized.test_and_set()) initMessaging();
    ms = new MsgStream(m_imsg,m_nm);
    m_msg_tls.reset( ms );
  }
 
  ms->setLevel (m_lvl);
  return *ms;
}

msg() [2/2]

MsgStream & AthMessaging::msg ( const MSG::Level  lvl ) const

inlineinherited

The standard message stream.

Returns a reference to the default message stream May not be invoked before sysInitialize() has been invoked.

Definition at line 179 of file AthMessaging.h.

{ return msg() << lvl; }

msgLvl()

bool AthMessaging::msgLvl ( const MSG::Level  lvl ) const

inlineinherited

Test the output level.

Parameters

lvl	The message level to test against

Returns

boolean Indicating if messages at given level will be printed

Return values

true	Messages at level "lvl" will be printed

Definition at line 151 of file AthMessaging.h.

{
  if (!m_initialized.test_and_set()) initMessaging();
  if (m_lvl <= lvl) {
    msg() << lvl;
    return true;
  } else {
    return false;
  }
}

ProcessHits()

G4bool MuonG4R4::TgcSensitiveDetector::ProcessHits ( G4Step *  aStep, G4TouchableHistory *  ROhist  )

finaloverride

Reject secondary particles

The x-axis of the gas gap coordinate system points to the outer big wheel -> extrapolate into the plane X = 0.

Final check that the hit is located at zero

At the very last clear the cache of the readout element

Definition at line 53 of file TgcSensitiveDetector.cxx.

                                                                           {
 
    G4Track* currentTrack = aStep->GetTrack();
    
    // TGC sensitive to charged particle only
    if (currentTrack->GetDefinition()->GetPDGCharge() == 0.0) {
      if (currentTrack->GetDefinition()!= G4Geantino::GeantinoDefinition()) return true;
      else if (currentTrack->GetDefinition()==G4ChargedGeantino::ChargedGeantinoDefinition()) return true;
    }
 
    constexpr double velCutOff = 10.*Gaudi::Units::micrometer / Gaudi::Units::second;
    if (currentTrack->GetVelocity() < velCutOff) return true;
 
    const G4TouchableHistory* touchHist = static_cast<const G4TouchableHistory*>(currentTrack->GetTouchable());
    
    const MuonGMR4::TgcReadoutElement* readOutEle = getReadoutElement(touchHist);
    if (!readOutEle) {
       return false;
    }
    ActsGeometryContext gctx{};
 
    SG::ReadHandle<DetectorAlignStore> trfStoreHandle{m_trfCacheKey};
    if (!trfStoreHandle.isValid()) {
      ATH_MSG_FATAL("Failed to retrieve "<<m_trfCacheKey.fullKey()<<".");
      return false;
    }
    gctx.setStore(std::make_unique<DetectorAlignStore>(*trfStoreHandle));
    
    const Amg::Transform3D globalToLocal = getTransform(currentTrack->GetTouchable(), 0).inverse();
    ATH_MSG_VERBOSE(" Track is inside volume "
                 <<currentTrack->GetTouchable()->GetHistory()->GetTopVolume()->GetName()
                 <<" transformation: "<<Amg::toString(globalToLocal));
    const Amg::Vector3D locPos{globalToLocal*Amg::Hep3VectorToEigen(currentTrack->GetPosition())};
    const Amg::Vector3D locDir{globalToLocal.linear()*Amg::Hep3VectorToEigen(currentTrack->GetMomentumDirection())};
    ATH_MSG_VERBOSE("Track is located in "<<m_detMgr->idHelperSvc()->toStringDetEl(readOutEle->identify())
                  <<" at "<<Amg::toString(locPos)<<" pointing towards "<<Amg::toString(locDir, 3));
 
    std::optional<double> travelDist = Amg::intersect<3>(locPos, locDir, Amg::Vector3D::UnitX(), 0);
    if (!travelDist) {
      ATH_MSG_VERBOSE("Hit cannot be extrapolated into the gas gap origin");
      return true;
    }
    const Amg::Vector3D lPosAtGap = locPos + (*travelDist) * locDir;
    ATH_MSG_VERBOSE("Extrpolated by "<<(*travelDist)<<" mm to the gasGap center "<<Amg::toString(lPosAtGap, 2));
    
    const Amg::Vector3D gapCenterCross = globalToLocal.inverse() * lPosAtGap;
    const Identifier etaHitID = getIdentifier(gctx, readOutEle, gapCenterCross, false);
    if (!etaHitID.is_valid()) {
        ATH_MSG_VERBOSE("No valid hit found");
        return true;
    }
    
    const double globalTime = currentTrack->GetGlobalTime() + (*travelDist) / currentTrack->GetVelocity();
    const Amg::Transform3D gapTrans{readOutEle->globalToLocalTrans(gctx, etaHitID)};
    const Amg::Vector3D locHitDir = gapTrans.linear() * Amg::Hep3VectorToEigen(currentTrack->GetMomentumDirection());
    const Amg::Vector3D locHitPos = gapTrans * gapCenterCross;
    
    if (std::abs(locHitPos.z()) > tolerance) {
        ATH_MSG_FATAL("The hit "<<Amg::toString(locHitPos)<<" doest not match "<<m_detMgr->idHelperSvc()->toString(etaHitID));
        throw std::runtime_error("Picked wrong gas gap");
    }
 
    readOutEle->releaseUnAlignedTrfs();
 
 
    xAOD::MuonSimHit* hit = new xAOD::MuonSimHit();
    m_writeHandle->push_back(hit);  
  
    TrackHelper trHelp(aStep->GetTrack());
    hit->setIdentifier(etaHitID); 
    hit->setLocalPosition(xAOD::toStorage(locHitPos));  
    hit->setLocalDirection(xAOD::toStorage(locHitDir));
    hit->setMass(currentTrack->GetDefinition()->GetPDGMass());
    hit->setGlobalTime(globalTime);
    hit->setPdgId(currentTrack->GetDefinition()->GetPDGEncoding());
    hit->setEnergyDeposit(aStep->GetTotalEnergyDeposit());
    hit->setKineticEnergy(currentTrack->GetKineticEnergy());
    hit->setGenParticleLink(trHelp.GenerateParticleLink());
    return true;
}

setLevel()

void AthMessaging::setLevel ( MSG::Level  lvl )

inherited

Change the current logging level.

Use this rather than msg().setLevel() for proper operation with MT.

Definition at line 28 of file AthMessaging.cxx.

{
  m_lvl = lvl;
}

Member Data Documentation

ATLAS_THREAD_SAFE

std::atomic_flag m_initialized AthMessaging::ATLAS_THREAD_SAFE = ATOMIC_FLAG_INIT

mutableprivateinherited

Messaging initialized (initMessaging)

Definition at line 141 of file AthMessaging.h.

m_detMgr

const MuonGMR4::MuonDetectorManager* MuonG4R4::TgcSensitiveDetector::m_detMgr {nullptr}

private

Pointer to the underlying detector manager.

Definition at line 60 of file TgcSensitiveDetector.h.

m_gctx

const ActsGeometryContext MuonG4R4::TgcSensitiveDetector::m_gctx {}

private

Pointer to the acts Geometry context.

Definition at line 58 of file TgcSensitiveDetector.h.

m_imsg

std::atomic<IMessageSvc*> AthMessaging::m_imsg { nullptr }

mutableprivateinherited

MessageSvc pointer.

Definition at line 135 of file AthMessaging.h.

m_lvl

std::atomic<MSG::Level> AthMessaging::m_lvl { MSG::NIL }

mutableprivateinherited

Current logging level.

Definition at line 138 of file AthMessaging.h.

m_msg_tls

boost::thread_specific_ptr<MsgStream> AthMessaging::m_msg_tls

mutableprivateinherited

MsgStream instance (a std::cout like with print-out levels)

Definition at line 132 of file AthMessaging.h.

m_nm

std::string AthMessaging::m_nm

privateinherited

Message source name.

Definition at line 129 of file AthMessaging.h.

m_trfCacheKey

SG::ReadHandleKey<ActsTrk::DetectorAlignStore> MuonG4R4::TgcSensitiveDetector::m_trfCacheKey

private

Definition at line 55 of file TgcSensitiveDetector.h.

m_writeHandle

SG::WriteHandle<xAOD::MuonSimHitContainer> MuonG4R4::TgcSensitiveDetector::m_writeHandle

private

Definition at line 50 of file TgcSensitiveDetector.h.

---

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

• TgcSensitiveDetector.h
• TgcSensitiveDetector.cxx