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+/**
+ * Copyright (C) 2009
+ * The IceCube collaboration
+ * ID: $Id: G4TankIceSD.h 149388 2016-08-18 21:50:04Z jgonzalez $
+ *
+ * @file G4TankIceSD.h
+ * @version $Rev: 149388 $
+ * @date $Date: 2016-08-18 22:50:04 +0100 (Thu, 18 Aug 2016) $
+ * @author Tilo Waldenmaier, Thomas Melzig
+ */
+
+
+#ifndef _G4TANKRESPONSE_G4TankIceSD_H
+#define _G4TANKRESPONSE_G4TankIceSD_H
+
+#include <icetray/OMKey.h>
+
+#include <G4VSensitiveDetector.hh>
+#include <G4ThreeVector.hh>
+
+#include <map>
+
+class G4Step;
+class G4HCofThisEvent;
+class G4TouchableHistory;
+
+
+/**
+ * An "ice sensitive detector". This sensitive detector is meant to be associated with the ice logical volume in a tank.
+ *
+ * This class keeps track of the energy losses and number Cherenkov photons produced in the ice of each tank.
+ * The Cherenkov photons are counted in two ways. One is a simple count and the other is a weighted count
+ * where the weight depends on the distance from the photon emission point an the OM.
+ */
+class G4TankIceSD : public G4VSensitiveDetector
+{
+ public:
+   G4TankIceSD(G4String name, const std::map<OMKey, G4ThreeVector>& domPositions);
+  ~G4TankIceSD();
+
+  /// Methods called by Geant4 framework
+  void Initialize(G4HCofThisEvent *HCE);
+  G4bool ProcessHits(G4Step *aStep, G4TouchableHistory *ROhist);
+  void EndOfEvent(G4HCofThisEvent *HCE);
+
+  /// Get total energy deposit for a given OM (same for both OMs in a tank)
+  G4double GetEDep(const OMKey& omKey) {return sumEdep_[omKey];}
+  /// Get average emission time weighted by deposited energy (same for both OMs in a tank)
+  G4double GetTime(const OMKey& omKey) {return cogTime_[omKey];}
+  /// Get number of Cherenkov photons for a given OM (same for both OMs in a tank)
+  G4double GetNumCherenkov(const OMKey& omKey) {return cherenkovCounter_[omKey];}
+  /// Get number of Cherenkov photons for a given OM weighted relative to emission point
+  G4double GetNumCherenkovWeight(const OMKey& omKey) {return cherenkovCounterWeight_[omKey];}
+
+ private:
+  //ExN04TrackerHitsCollection *trackerCollection;
+  const std::map<OMKey, G4ThreeVector> domPositions_;
+
+  /// Cherenkov production. See technical note
+  G4double GetCerenkovNumber(G4Step* aStep);
+  G4double GetProbability(G4double radius, G4double height);
+
+  std::map<OMKey, G4double> sumEdep_;
+  std::map<OMKey, G4double> cogTime_;
+  std::map<OMKey, G4double> cherenkovCounter_;
+  std::map<OMKey, G4double> cherenkovCounterWeight_;
+};
+
+#endif