G4IonDEDXHandler.hh

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// ===========================================================================
// GEANT4 class header file
//
// Class:                G4IonDEDXHandler
//
// Author:               Anton Lechner (Anton.Lechner@cern.ch)
//
// First implementation: 11. 03. 2009
//
// Modifications: 
//
//
// Class description:
//    Ion dE/dx table handler. 
//
// Comments:
//
// =========================================================================== 
 
#ifndef G4IONDEDXHANDLER_HH
#define G4IONDEDXHANDLER_HH
 
#include "globals.hh"
#include <vector>
#include <utility>
#include <list>
#include <map>
 
class G4ParticleDefinition;
class G4Material;
class G4PhysicsVector;
class G4VIonDEDXTable;
class G4VIonDEDXScalingAlgorithm;
 
 
// #########################################################################
// # Type definitions for a local cache
// #########################################################################
 
typedef struct CacheValue{
  G4double energyScaling;         // Scaling factor for kinetic energy
  G4PhysicsVector* dedxVector;    // dE/dx vector for current projectile-
  // material combination
  G4double lowerEnergyEdge;       // Lower energy edge of dE/dx vector
  G4double upperEnergyEdge;       // Upper energy edge of dE/dx vector
  G4double density;               // Material density
} G4CacheValue;
// #########################################################################
// # Class G4IonDEDXHandler: Handler class for stopping power tables
// #########################################################################
 
class G4IonDEDXHandler {
 public:
  explicit G4IonDEDXHandler(G4VIonDEDXTable* tables,
                G4VIonDEDXScalingAlgorithm* algorithm,
                const G4String& name,
                G4int maxCacheSize = 5,
                G4bool splines = true);
  ~G4IonDEDXHandler();
 
  // Function checking the availability of stopping power values for a 
  // given ion-target combination (kinetic energy not considered) 
  G4bool IsApplicable(
              const G4ParticleDefinition*,  // Projectile (ion) 
              const G4Material*);           // Target material             
 
  // Function returning the stopping power of a given material for a
  // projectile of specified energy
  G4double GetDEDX(
           const G4ParticleDefinition*,  // Projectile (ion) 
           const G4Material*,            // Target material 
           G4double);                    // Kinetic energy of projectile
  
  
  // Function for building stopping power vectors according to Bragg's
  // additivity rule
  G4bool BuildDEDXTable(
            const G4ParticleDefinition*,  // Projectile (ion) 
            const G4Material*);           // Target material 
  
  // Function for building stopping power vectors according to Bragg's
  // additivity rule
  G4bool BuildDEDXTable(
            G4int atomicNumberIon,        // Atomic number of ion 
            const G4Material*);           // Target material 
  
  // Function printing stopping powers for a given ion-material combination
  // within a specified energy range 
  void PrintDEDXTable(
              const G4ParticleDefinition*,  // Projectile (ion) 
              const G4Material* ,           // Target material
              G4double,                     // Minimum energy per nucleon
              G4double,                     // Maximum energy per nucleon
              G4int,                        // Number of bins
              G4bool logScaleEnergy = true);// Logarithmic scaling of energy
  
  // Function returning the lower energy edge of stopping power tables
  G4double GetLowerEnergyEdge(
                  const G4ParticleDefinition*,  // Projectile (ion) 
                  const G4Material*);           // Target material 
  
  // Function returning the upper energy edge of stopping power tables 
  G4double GetUpperEnergyEdge(
                  const G4ParticleDefinition*,  // Projectile (ion) 
                  const G4Material*);           // Target material 
  
  // Function for clearing the cache
  void ClearCache();
  
  G4String GetName();
  
  G4IonDEDXHandler& operator=(const G4IonDEDXHandler &r) = delete;
  G4IonDEDXHandler(const G4IonDEDXHandler&) = delete;
 
private:
   // ######################################################################
   // # Stopping power table (table of stopping power vectors either built
   // # by G4VIonDEDXTable, or by the current class (using the Bragg 
   // # addivity rule)
   // ######################################################################
 
   // Class which creates dE/dx vectors 
   G4VIonDEDXTable* table;
 
   // Algorithm for scaling dE/dx values
   G4VIonDEDXScalingAlgorithm* algorithm;
 
   // Name associated with the dE/dx table
   G4String tableName;
 
   // Map of all dE/dx vectors
   typedef std::pair<G4int, const G4Material*> G4IonKey;
   typedef std::map<G4IonKey, G4PhysicsVector*> DEDXTable; 
   DEDXTable stoppingPowerTable;
 
   // Map of dE/dx vectors, built according to the Bragg additivity rule
   typedef std::map<G4IonKey, G4PhysicsVector*> DEDXTableBraggRule;
   DEDXTableBraggRule stoppingPowerTableBragg;
 
   // Flag indicating the usage of splines for dE/dx vectors built according
   // to Bragg rule
   G4bool useSplines;
 
   // ######################################################################
   // # "Most-recently-used" cache, to provide a faster access to physics 
   // # vectors
   // ######################################################################
 
   // A type definition of cache entry containing a key-value pair
   typedef std::pair<const G4ParticleDefinition*, const G4Material*> G4CacheKey;
   typedef struct CacheEntry {
      G4CacheKey key;
      G4CacheValue value;
   } G4CacheEntry;
 
   // A cache entry list, and a map of pointers to list iterators (for faster
   // searching)
   typedef std::list<G4CacheEntry> CacheEntryList;
   CacheEntryList cacheEntries;
 
   typedef std::map<G4CacheKey, void*> CacheIterPointerMap;
   CacheIterPointerMap cacheKeyPointers;  
 
  // Function for updating the cache
   G4CacheValue UpdateCacheValue(
                const G4ParticleDefinition*,  // Projectile (ion) 
                const G4Material*);           // Target material
 
   // Function for retrieving cache values
   G4CacheValue GetCacheValue(
                const G4ParticleDefinition*,  // Projectile (ion) 
                const G4Material*);           // Target material
 
   // Maximum number of cache entries
   G4int maxCacheEntries;
 
};
 
#endif  // G4IONDEDXHANDLER_HH