#include <SubsystemNeutronReader.h>

Inheritance diagram for SubsystemNeutronReader:

Public Member Functions
void	clear ()

void	generateChamberNoise (int chamberType, int chamberIndex, edm::PSimHitContainer &result, CLHEP::HepRandomEngine *)

	SubsystemNeutronReader (const edm::ParameterSet &pset)

virtual	~SubsystemNeutronReader ()

Protected Member Functions
virtual int	detId (int chamberIndex, int localDetId)=0

Private Attributes
std::vector< int >	theChambersDone
	just makes sure chambers aren't done twice More...

float	theEndTime

std::vector< double >	theEventOccupancy

float	theEventsInWindow
	how many collsions happened between theStartTime and theEndTime More...

NeutronReader *	theHitReader

float	theLuminosity
	in units of 10**34, set by Muon:NeutronLuminosity More...

float	theStartTime

Detailed Description

Definition at line 20 of file SubsystemNeutronReader.h.

Constructor & Destructor Documentation

◆ SubsystemNeutronReader()

SubsystemNeutronReader::SubsystemNeutronReader ( const edm::ParameterSet & pset )

the hits will be distributed flat in time between startTime and endTime eventOccupancy is the expected chamber occupancy from a single min bias event for each chamber type

Definition at line 13 of file SubsystemNeutronReader.cc.

     : theHitReader(nullptr),
       theLuminosity(pset.getParameter<double>("luminosity")),  // in units of 10^34
       theStartTime(pset.getParameter<double>("startTime")),
       theEndTime(pset.getParameter<double>("endTime")),
       theEventOccupancy(pset.getParameter<vector<double> >("eventOccupancy"))  // TODO make map
 {
   // 17.3 collisions per live bx, 79.5% of bx live
   float collisionsPerCrossing = 13.75 * theLuminosity;
   int windowSize = (int)((theEndTime - theStartTime) / 25.);
   theEventsInWindow = collisionsPerCrossing * windowSize;
   string reader = pset.getParameter<string>("reader");
   edm::FileInPath input = pset.getParameter<edm::FileInPath>("input");
   if (reader == "ASCII") {
     theHitReader = new AsciiNeutronReader(input.fullPath());
   } else if (reader == "ROOT") {
     theHitReader = new RootNeutronReader(input.fullPath());
   }
 }

References input, createfilelist::int, muonDTDigis_cfi::pset, DQM::reader, theEndTime, theEventsInWindow, theHitReader, theLuminosity, and theStartTime.

◆ ~SubsystemNeutronReader()

SubsystemNeutronReader::~SubsystemNeutronReader ( )

virtual

Definition at line 33 of file SubsystemNeutronReader.cc.

33 { delete theHitReader; }

References theHitReader.

Member Function Documentation

◆ clear()

void SubsystemNeutronReader::clear ( void )

inline

Definition at line 32 of file SubsystemNeutronReader.h.

32 { theChambersDone.clear(); }

References theChambersDone.

◆ detId()

virtual int SubsystemNeutronReader::detId	(	int	chamberIndex,
		int	localDetId
	)

protectedpure virtual

detector-specific way to get the global detector ID, given the local one.

Implemented in CSCNeutronReader.

Referenced by generateChamberNoise().

◆ generateChamberNoise()

void SubsystemNeutronReader::generateChamberNoise	(	int	chamberType,
		int	chamberIndex,
		edm::PSimHitContainer &	result,
		CLHEP::HepRandomEngine *	engine
	)

this class makes sure the same chamberIndex isn't called twice for an event

Definition at line 35 of file SubsystemNeutronReader.cc.

                                                                                 {
   // make sure this chamber hasn't been done before
   if (find(theChambersDone.begin(), theChambersDone.end(), chamberIndex) == theChambersDone.end()) {
     float meanNumberOfEvents = theEventOccupancy[chamberType - 1] * theEventsInWindow;
     CLHEP::RandPoissonQ randPoissonQ(*engine, meanNumberOfEvents);
     int nEventsToAdd = randPoissonQ.fire();
     //    LogDebug("NeutronReader") << "Number of neutron events to add: "
     //std::cout << "Number of neutron events to add for chamber type " << chamberType << " : "
     // << nEventsToAdd <<  " mean " << meanNumberOfEvents << std::endl;
     //                   << nEventsToAdd <<  " mean " << meanNumberOfEvents;
  
     for (int i = 0; i < nEventsToAdd; ++i) {
       // find the time for this event
       float timeOffset = CLHEP::RandFlat::shoot(engine, theStartTime, theEndTime);
       vector<PSimHit> neutronHits;
       theHitReader->readNextEvent(chamberType, neutronHits);
  
       for (vector<PSimHit>::const_iterator neutronHitItr = neutronHits.begin(); neutronHitItr != neutronHits.end();
            ++neutronHitItr) {
         const PSimHit& rawHit = *neutronHitItr;
         // do the time offset and local det id
         int det = detId(chamberIndex, rawHit.detUnitId());
         PSimHit hit(rawHit.entryPoint(),
                     rawHit.exitPoint(),
                     rawHit.pabs(),
                     rawHit.tof() + timeOffset,
                     rawHit.energyLoss(),
                     rawHit.particleType(),
                     det,
                     rawHit.trackId(),
                     rawHit.thetaAtEntry(),
                     rawHit.phiAtEntry(),
                     rawHit.processType());
         //std::cout << "NEWHIT " << hit << std::endl;
         result.push_back(hit);
       }
     }
     theChambersDone.push_back(chamberIndex);
   }
 }