diff --git a/RecoTracker/LSTCore/interface/MiniDoubletsSoA.h b/RecoTracker/LSTCore/interface/MiniDoubletsSoA.h
new file mode 100644
index 0000000000000..72fe6cb60c6bf
--- /dev/null
+++ b/RecoTracker/LSTCore/interface/MiniDoubletsSoA.h
@@ -0,0 +1,61 @@
+#ifndef RecoTracker_LSTCore_interface_MiniDoubletsSoA_h
+#define RecoTracker_LSTCore_interface_MiniDoubletsSoA_h
+
+#include "DataFormats/SoATemplate/interface/SoALayout.h"
+#include "DataFormats/Portable/interface/alpaka/PortableCollection.h"
+
+namespace ALPAKA_ACCELERATOR_NAMESPACE::lst {
+
+  GENERATE_SOA_LAYOUT(MiniDoubletsSoALayout,
+                      SOA_COLUMN(unsigned int, anchorHitIndices),
+                      SOA_COLUMN(unsigned int, outerHitIndices),
+                      SOA_COLUMN(uint16_t, moduleIndices),
+                      SOA_COLUMN(float, dphichanges),
+                      SOA_COLUMN(float, dzs),
+                      SOA_COLUMN(float, dphis),
+                      SOA_COLUMN(float, shiftedXs),
+                      SOA_COLUMN(float, shiftedYs),
+                      SOA_COLUMN(float, shiftedZs),
+                      SOA_COLUMN(float, noShiftedDphis),
+                      SOA_COLUMN(float, noShiftedDphiChanges),
+                      SOA_COLUMN(float, anchorX),
+                      SOA_COLUMN(float, anchorY),
+                      SOA_COLUMN(float, anchorZ),
+                      SOA_COLUMN(float, anchorRt),
+                      SOA_COLUMN(float, anchorPhi),
+                      SOA_COLUMN(float, anchorEta),
+                      SOA_COLUMN(float, anchorHighEdgeX),
+                      SOA_COLUMN(float, anchorHighEdgeY),
+                      SOA_COLUMN(float, anchorLowEdgeX),
+                      SOA_COLUMN(float, anchorLowEdgeY),
+                      SOA_COLUMN(float, anchorLowEdgePhi),
+                      SOA_COLUMN(float, anchorHighEdgePhi),
+                      SOA_COLUMN(float, outerX),
+                      SOA_COLUMN(float, outerY),
+                      SOA_COLUMN(float, outerZ),
+                      SOA_COLUMN(float, outerRt),
+                      SOA_COLUMN(float, outerPhi),
+                      SOA_COLUMN(float, outerEta),
+                      SOA_COLUMN(float, outerHighEdgeX),
+                      SOA_COLUMN(float, outerHighEdgeY),
+                      SOA_COLUMN(float, outerLowEdgeX),
+                      SOA_COLUMN(float, outerLowEdgeY));
+
+  GENERATE_SOA_LAYOUT(MiniDoubletsOccupancySoALayout,
+                      SOA_COLUMN(unsigned int, nMDs),
+                      SOA_COLUMN(unsigned int, totOccupancyMDs));
+
+  using MiniDoubletsSoA = MiniDoubletsSoALayout<>;
+  using MiniDoubletsOccupancySoA = MiniDoubletsOccupancySoALayout<>;
+
+  using MiniDoublets = MiniDoubletsSoA::View;
+  using MiniDoubletsConst = MiniDoubletsSoA::ConstView;
+  using MiniDoubletsOccupancy = MiniDoubletsOccupancySoA::View;
+  using MiniDoubletsOccupancyConst = MiniDoubletsOccupancySoA::ConstView;
+
+  using MiniDoubletsDeviceCollection = PortableCollection2<MiniDoubletsSoA, MiniDoubletsOccupancySoA>;
+  using MiniDoubletsHostCollection = PortableHostMultiCollection<MiniDoubletsSoA, MiniDoubletsOccupancySoA>;
+
+}  // namespace ALPAKA_ACCELERATOR_NAMESPACE::lst
+
+#endif
\ No newline at end of file
diff --git a/RecoTracker/LSTCore/src/alpaka/MiniDoublet.h b/RecoTracker/LSTCore/src/alpaka/MiniDoublet.h
index 04a1ff0d9dd69..dad5ebe7c9c8b 100644
--- a/RecoTracker/LSTCore/src/alpaka/MiniDoublet.h
+++ b/RecoTracker/LSTCore/src/alpaka/MiniDoublet.h
@@ -2,10 +2,9 @@
 #define RecoTracker_LSTCore_src_alpaka_MiniDoublet_h
 
 #include "HeterogeneousCore/AlpakaInterface/interface/workdivision.h"
-#include "DataFormats/SoATemplate/interface/SoALayout.h"
-#include "DataFormats/Portable/interface/alpaka/PortableCollection.h"
 
 #include "RecoTracker/LSTCore/interface/alpaka/Constants.h"
+#include "RecoTracker/LSTCore/interface/MiniDoubletsSoA.h"
 #include "RecoTracker/LSTCore/interface/Module.h"
 #include "RecoTracker/LSTCore/interface/EndcapGeometry.h"
 
@@ -13,57 +12,6 @@
 #include "ObjectRanges.h"
 
 namespace ALPAKA_ACCELERATOR_NAMESPACE::lst {
-
-  GENERATE_SOA_LAYOUT(MiniDoubletsSoALayout,
-                      SOA_COLUMN(unsigned int, anchorHitIndices),
-                      SOA_COLUMN(unsigned int, outerHitIndices),
-                      SOA_COLUMN(uint16_t, moduleIndices),
-                      SOA_COLUMN(float, dphichanges),
-                      SOA_COLUMN(float, dzs),
-                      SOA_COLUMN(float, dphis),
-                      SOA_COLUMN(float, shiftedXs),
-                      SOA_COLUMN(float, shiftedYs),
-                      SOA_COLUMN(float, shiftedZs),
-                      SOA_COLUMN(float, noShiftedDphis),
-                      SOA_COLUMN(float, noShiftedDphiChanges),
-                      SOA_COLUMN(float, anchorX),
-                      SOA_COLUMN(float, anchorY),
-                      SOA_COLUMN(float, anchorZ),
-                      SOA_COLUMN(float, anchorRt),
-                      SOA_COLUMN(float, anchorPhi),
-                      SOA_COLUMN(float, anchorEta),
-                      SOA_COLUMN(float, anchorHighEdgeX),
-                      SOA_COLUMN(float, anchorHighEdgeY),
-                      SOA_COLUMN(float, anchorLowEdgeX),
-                      SOA_COLUMN(float, anchorLowEdgeY),
-                      SOA_COLUMN(float, anchorLowEdgePhi),
-                      SOA_COLUMN(float, anchorHighEdgePhi),
-                      SOA_COLUMN(float, outerX),
-                      SOA_COLUMN(float, outerY),
-                      SOA_COLUMN(float, outerZ),
-                      SOA_COLUMN(float, outerRt),
-                      SOA_COLUMN(float, outerPhi),
-                      SOA_COLUMN(float, outerEta),
-                      SOA_COLUMN(float, outerHighEdgeX),
-                      SOA_COLUMN(float, outerHighEdgeY),
-                      SOA_COLUMN(float, outerLowEdgeX),
-                      SOA_COLUMN(float, outerLowEdgeY));
-
-  GENERATE_SOA_LAYOUT(MiniDoubletsOccupancySoALayout,
-                      SOA_COLUMN(unsigned int, nMDs),
-                      SOA_COLUMN(unsigned int, totOccupancyMDs));
-
-  using MiniDoubletsSoA = MiniDoubletsSoALayout<>;
-  using MiniDoubletsOccupancySoA = MiniDoubletsOccupancySoALayout<>;
-
-  using MiniDoublets = MiniDoubletsSoA::View;
-  using MiniDoubletsConst = MiniDoubletsSoA::ConstView;
-  using MiniDoubletsOccupancy = MiniDoubletsOccupancySoA::View;
-  using MiniDoubletsOccupancyConst = MiniDoubletsOccupancySoA::ConstView;
-
-  using MiniDoubletsDeviceCollection = PortableCollection2<MiniDoubletsSoA, MiniDoubletsOccupancySoA>;
-  using MiniDoubletsHostCollection = PortableHostMultiCollection<MiniDoubletsSoA, MiniDoubletsOccupancySoA>;
-
   template <typename TAcc>
   ALPAKA_FN_ACC ALPAKA_FN_INLINE void addMDToMemory(TAcc const& acc,
                                                     MiniDoublets mds,