Start converting TTB data/physics

include/openmc/bremsstrahlung.h

@@ -0,0 +1,44 @@
+#ifndef OPENMC_BREMSSTRAHLUNG_H
+#define OPENMC_BREMSSTRAHLUNG_H
+
+#include "openmc/particle.h"
+
+#include "xtensor/xtensor.hpp"
+
+namespace openmc {
+
+//==============================================================================
+// Bremsstrahlung classes
+//==============================================================================
+
+class BremsstrahlungData {
+public:
+  // Data
+  xt::xtensor<double, 2> pdf; //!< Bremsstrahlung energy PDF
+  xt::xtensor<double, 2> cdf; //!< Bremsstrahlung energy CDF
+  xt::xtensor<double, 1> yield; //!< Photon yield
+};
+
+class Bremsstrahlung {
+public:
+  // Data
+  BremsstrahlungData electron;
+  BremsstrahlungData positron;
+};
+
+//==============================================================================
+// Global variables
+//==============================================================================
+
+namespace data {
+
+extern xt::xtensor<double, 1> ttb_e_grid; //! energy T of incident electron in [eV]
+extern xt::xtensor<double, 1> ttb_k_grid; //! reduced energy W/T of emitted photon
+
+} // namespace data
+
+void thick_target_bremsstrahlung(Particle& p, double* E_lost);
+
+} // namespace openmc
+
+#endif // OPENMC_BREMSSTRAHLUNG_H

include/openmc/material.h

@@ -1,11 +1,14 @@
 #ifndef OPENMC_MATERIAL_H
 #define OPENMC_MATERIAL_H
 
+#include <memory> // for unique_ptr
 #include <unordered_map>
 #include <vector>
 
 #include "pugixml.hpp"
 
+#include "openmc/bremsstrahlung.h"
+#include "openmc/particle.h"
 
 namespace openmc {
 
@@ -38,9 +41,14 @@ public:
   //! A negative value indicates no default temperature was specified.
   double temperature_ {-1};
 
+  std::unique_ptr<Bremsstrahlung> ttb_;
+
   Material() {};
 
   explicit Material(pugi::xml_node material_node);
+
+private:
+  void init_bremsstrahlung();
 };
 
 //==============================================================================

include/openmc/photon.h

@@ -119,8 +119,6 @@ struct ElementMicroXS {
 
 std::pair<double, double> klein_nishina(double alpha);
 
-void thick_target_bremsstrahlung(Particle& p, double* E_lost);
-
 //==============================================================================
 // Global variables
 //==============================================================================
@@ -128,8 +126,6 @@ void thick_target_bremsstrahlung(Particle& p, double* E_lost);
 namespace data {
 
 extern xt::xtensor<double, 1> compton_profile_pz; //! Compton profile momentum grid
-extern xt::xtensor<double, 1> ttb_e_grid; //! energy T of incident electron in [eV]
-extern xt::xtensor<double, 1> ttb_k_grid; //! reduced energy W/T of emitted photon
 
 //! Photon interaction data for each element
 extern std::vector<PhotonInteraction> elements;