#include <BTLDeviceSim.h>

Public Member Functions
	BTLDeviceSim (const edm::ParameterSet &pset)

void	getEvent (const edm::Event &evt)

void	getEventSetup (const edm::EventSetup &evt)

void	getHitsResponse (const std::vector< std::tuple< int, uint32_t, float > > &hitRefs, const edm::Handle< edm::PSimHitContainer > &hits, mtd_digitizer::MTDSimHitDataAccumulator simHitAccumulator, CLHEP::HepRandomEngine hre)

Private Attributes
const float	bxTime_

const MTDGeometry *	geom_

const float	LightCollEff_

const float	LightCollSlopeL_

const float	LightCollSlopeR_

const float	LightYield_

const float	PDE_

const MTDTopology *	topo_

Detailed Description

Definition at line 23 of file BTLDeviceSim.h.

Constructor & Destructor Documentation

◆ BTLDeviceSim()

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

Definition at line 14 of file BTLDeviceSim.cc.

     : geom_(nullptr),
       topo_(nullptr),
       bxTime_(pset.getParameter<double>("bxTime")),
       LightYield_(pset.getParameter<double>("LightYield")),
       LightCollEff_(pset.getParameter<double>("LightCollectionEff")),
       LightCollSlopeR_(pset.getParameter<double>("LightCollectionSlopeR")),
       LightCollSlopeL_(pset.getParameter<double>("LightCollectionSlopeL")),
       PDE_(pset.getParameter<double>("PhotonDetectionEff")) {}

Member Function Documentation

◆ getEvent()

void BTLDeviceSim::getEvent ( const edm::Event & evt )

inline

Definition at line 27 of file BTLDeviceSim.h.

27 {}

◆ getEventSetup()

void BTLDeviceSim::getEventSetup ( const edm::EventSetup & evt )

Definition at line 24 of file BTLDeviceSim.cc.

                                                          {
   edm::ESHandle<MTDGeometry> geom;
   evs.get<MTDDigiGeometryRecord>().get(geom);
   geom_ = geom.product();
  
   edm::ESHandle<MTDTopology> mtdTopo;
   evs.get<MTDTopologyRcd>().get(mtdTopo);
   topo_ = mtdTopo.product();
 }

References relativeConstraints::geom, geom_, edm::EventSetup::get(), get, edm::ESHandle< T >::product(), and topo_.

◆ getHitsResponse()

void BTLDeviceSim::getHitsResponse	(	const std::vector< std::tuple< int, uint32_t, float > > &	hitRefs,
		const edm::Handle< edm::PSimHitContainer > &	hits,
		mtd_digitizer::MTDSimHitDataAccumulator *	simHitAccumulator,
		CLHEP::HepRandomEngine *	hre
	)

Definition at line 34 of file BTLDeviceSim.cc.

                                                               {
   //loop over sorted simHits
   for (auto const& hitRef : hitRefs) {
     const int hitidx = std::get<0>(hitRef);
     const uint32_t id = std::get<1>(hitRef);
     const MTDDetId detId(id);
     const PSimHit& hit = hits->at(hitidx);
  
     // --- Safety check on the detector ID
     if (detId.det() != DetId::Forward || detId.mtdSubDetector() != 1)
       continue;
  
     if (id == 0)
       continue;  // to be ignored at RECO level
  
     BTLDetId btlid(detId);
     const int boundRef = btlid.modulesPerType(MTDTopologyMode::crysLayoutFromTopoMode(topo_->getMTDTopologyMode()));
     DetId geoId = BTLDetId(btlid.mtdSide(), btlid.mtdRR(), btlid.module() + boundRef * (btlid.modType() - 1), 0, 1);
     const MTDGeomDet* thedet = geom_->idToDet(geoId);
  
     if (thedet == nullptr) {
       throw cms::Exception("BTLDeviceSim") << "GeographicalID: " << std::hex << geoId.rawId() << " (" << detId.rawId()
                                            << ") is invalid!" << std::dec << std::endl;
     }
     const ProxyMTDTopology& topoproxy = static_cast<const ProxyMTDTopology&>(thedet->topology());
     const RectangularMTDTopology& topo = static_cast<const RectangularMTDTopology&>(topoproxy.specificTopology());
     // calculate the simhit row and column
     const auto& pentry = hit.entryPoint();
     Local3DPoint simscaled(0.1 * pentry.x(), 0.1 * pentry.y(), 0.1 * pentry.z());  // mm -> cm here is the switch
     // translate from crystal-local coordinates to module-local coordinates to get the row and column
     simscaled = topo.pixelToModuleLocalPoint(simscaled, btlid.row(topo.nrows()), btlid.column(topo.nrows()));
     const auto& thepixel = topo.pixel(simscaled);
     uint8_t row(thepixel.first), col(thepixel.second);
  
     if (btlid.row(topo.nrows()) != row || btlid.column(topo.nrows()) != col) {
       edm::LogWarning("BTLDeviceSim") << "BTLDetId (row,column): (" << btlid.row(topo.nrows()) << ','
                                       << btlid.column(topo.nrows()) << ") is not equal to "
                                       << "topology (row,column): (" << uint32_t(row) << ',' << uint32_t(col)
                                       << "), overriding to detid";
       row = btlid.row(topo.nrows());
       col = btlid.column(topo.nrows());
     }
  
     // --- Store the detector element ID as a key of the MTDSimHitDataAccumulator map
     auto simHitIt =
         simHitAccumulator->emplace(mtd_digitizer::MTDCellId(id, row, col), mtd_digitizer::MTDCellInfo()).first;
  
     // --- Get the simHit energy and convert it from MeV to photo-electrons
     float Npe = 1000. * hit.energyLoss() * LightYield_ * LightCollEff_ * PDE_;
  
     // --- Calculate the light propagation time to the crystal bases (labeled L and R)
     double distR = 0.5 * topo.pitch().second - 0.1 * hit.localPosition().y();
     double distL = 0.5 * topo.pitch().second + 0.1 * hit.localPosition().y();
  
     // This is for the layouts with bars along phi
     if (MTDTopologyMode::crysLayoutFromTopoMode(topo_->getMTDTopologyMode()) == BTLDetId::CrysLayout::bar ||
         MTDTopologyMode::crysLayoutFromTopoMode(topo_->getMTDTopologyMode()) == BTLDetId::CrysLayout::barphiflat) {
       distR = 0.5 * topo.pitch().first - 0.1 * hit.localPosition().x();
       distL = 0.5 * topo.pitch().first + 0.1 * hit.localPosition().x();
     }
  
     double tR = std::get<2>(hitRef) + LightCollSlopeR_ * distR;
     double tL = std::get<2>(hitRef) + LightCollSlopeL_ * distL;
  
     // --- Accumulate in 15 buckets of 25ns (9 pre-samples, 1 in-time, 5 post-samples)
     const int iBXR = std::floor(tR / bxTime_) + mtd_digitizer::kInTimeBX;
     const int iBXL = std::floor(tL / bxTime_) + mtd_digitizer::kInTimeBX;
  
     // --- Right side
     if (iBXR > 0 && iBXR < mtd_digitizer::kNumberOfBX) {
       // Accumulate the energy of simHits in the same crystal
       (simHitIt->second).hit_info[0][iBXR] += Npe;
  
       // Store the time of the first SimHit in the i-th BX
       if ((simHitIt->second).hit_info[1][iBXR] == 0 || tR < (simHitIt->second).hit_info[1][iBXR])
         (simHitIt->second).hit_info[1][iBXR] = tR - (iBXR - mtd_digitizer::kInTimeBX) * bxTime_;
     }
  
     // --- Left side
     if (iBXL > 0 && iBXL < mtd_digitizer::kNumberOfBX) {
       // Accumulate the energy of simHits in the same crystal
       (simHitIt->second).hit_info[2][iBXL] += Npe;
  
       // Store the time of the first SimHit in the i-th BX
       if ((simHitIt->second).hit_info[3][iBXL] == 0 || tL < (simHitIt->second).hit_info[3][iBXL])
         (simHitIt->second).hit_info[3][iBXL] = tL - (iBXL - mtd_digitizer::kInTimeBX) * bxTime_;
     }
  
   }  // hitRef loop
 }