diff --git a/neuland/application/R3BNeulandSimApp.cxx b/neuland/application/R3BNeulandSimApp.cxx
index b22ad4e5b..a5d94d42a 100644
--- a/neuland/application/R3BNeulandSimApp.cxx
+++ b/neuland/application/R3BNeulandSimApp.cxx
@@ -58,12 +58,7 @@ namespace R3B::Neuland
         {
             if (options.type == "muon")
             {
-                return create_muon_generator(*random_gen_,
-                                             options_pos.num_of_dp,
-                                             options.energy,
-                                             options_pos.location.x,
-                                             options_pos.location.y,
-                                             options_pos.location.z);
+                return create_muon_generator(*random_gen_, options_pos.num_of_dp, options.energy, options_pos.location);
             }
             if (options.type == "box")
             {
diff --git a/neuland/application/R3BNeulandSimApp.h b/neuland/application/R3BNeulandSimApp.h
index d89569f1f..cdf748b4b 100644
--- a/neuland/application/R3BNeulandSimApp.h
+++ b/neuland/application/R3BNeulandSimApp.h
@@ -11,12 +11,6 @@ namespace R3B::Neuland
     constexpr auto DEFAULT_NEULAND_Z_POS = 1650.; // cm
     constexpr auto DEFAULT_NEULAND_ENERGY = 0.6;  // GeV
 
-    struct XYZCoordinate
-    {
-        double x{};
-        double y{};
-        double z{};
-    };
 
     class SimulationApplication : public Application
     {
diff --git a/neuland/shared/R3BNeulandCommon.h b/neuland/shared/R3BNeulandCommon.h
index 0ea09623e..fda3a01d4 100644
--- a/neuland/shared/R3BNeulandCommon.h
+++ b/neuland/shared/R3BNeulandCommon.h
@@ -124,4 +124,11 @@ namespace R3B::Neuland
 
     // NeuLAND TPAT:
     constexpr auto NeulandOnSpillTpatPos = 0U; // 0 based
+
+    struct XYZCoordinate
+    {
+        double x{};
+        double y{};
+        double z{};
+    };
 } // namespace R3B::Neuland
diff --git a/neuland/simulation/generator/R3BNeulandGenerators.h b/neuland/simulation/generator/R3BNeulandGenerators.h
index 2d4e977ad..c7352c99e 100644
--- a/neuland/simulation/generator/R3BNeulandGenerators.h
+++ b/neuland/simulation/generator/R3BNeulandGenerators.h
@@ -9,21 +9,16 @@
 
 // NOTE: what's the purpose of this file? Just function definitions?
 
-inline auto create_muon_generator(TRandom3& random_gen,
-                                  int num_dp,
-                                  double energy,
-                                  double x_pos,
-                                  double y_pos,
-                                  double z_pos)
+inline auto create_muon_generator(TRandom3& random_gen, int num_dp, double energy,const  R3B::Neuland::XYZCoordinate& pos)
 {
     constexpr auto PID = 2112;
     auto detector_box_size = ::R3B::Neuland::DetectorBoxSize{};
-    detector_box_size.xmin = x_pos - R3B::Neuland::BarLength / 2;
-    detector_box_size.xmax = x_pos + R3B::Neuland::BarLength / 2;
-    detector_box_size.ymin = y_pos - R3B::Neuland::BarLength / 2;
-    detector_box_size.ymax = y_pos + R3B::Neuland::BarLength / 2;
-    detector_box_size.zmin = z_pos - (R3B::Neuland::BarSize_Z * num_dp);
-    detector_box_size.zmax = z_pos + (R3B::Neuland::BarSize_Z * num_dp);
+    detector_box_size.xmin = pos.x - R3B::Neuland::BarLength / 2;
+    detector_box_size.xmax = pos.x + R3B::Neuland::BarLength / 2;
+    detector_box_size.ymin = pos.y - R3B::Neuland::BarLength / 2;
+    detector_box_size.ymax = pos.y + R3B::Neuland::BarLength / 2;
+    detector_box_size.zmin = pos.z - (R3B::Neuland::BarSize_Z * num_dp);
+    detector_box_size.zmax = pos.z + (R3B::Neuland::BarSize_Z * num_dp);
 
     auto angle_dist = R3B::Neuland::AngleDist{};
     auto energy_dist = R3B::Neuland::EnergyDist{};