diff --git a/Projects/Strasse/Analysis.cxx b/Projects/Strasse/Analysis.cxx
index 9dce0cfd7423acf563f22ae08898a4fcda182e83..58ea82dffdb5994468659e383f96017659b021cc 100644
--- a/Projects/Strasse/Analysis.cxx
+++ b/Projects/Strasse/Analysis.cxx
@@ -45,11 +45,19 @@ void Analysis::Init(){
   InitInputBranch();
   
   Strasse = (TStrassePhysics*)  m_DetectorManager -> GetDetector("Strasse");
-  myReaction = new NPL::Reaction();
-  myReaction->ReadConfigurationFile(NPOptionManager::getInstance()->GetReactionFile());
+  // reaction properties
+  myQFS = new NPL::QFS();
+  myQFS->ReadConfigurationFile(NPOptionManager::getInstance()->GetReactionFile());
+  // reaction properties
+  myBeam = new NPL::Beam();
+  myBeam->ReadConfigurationFile(NPOptionManager::getInstance()->GetReactionFile());
+  InitialBeamEnergy = myBeam->GetEnergy() * myBeam->GetA();
   // target thickness
   TargetThickness = m_DetectorManager->GetTargetThickness();
   string TargetMaterial = m_DetectorManager->GetTargetMaterial();
+  // EnergyLoss Tables
+  string BeamName = NPL::ChangeNameToG4Standard(myBeam->GetName());
+  BeamTarget = NPL::EnergyLoss(BeamName+"_"+TargetMaterial+".G4Table","G4Table",10000);
 } 
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -81,7 +89,31 @@ void Analysis::TreatEvent(){
     VertexX=Vertex.X();
     VertexY=Vertex.Y();
     VertexZ=Vertex.Z();
-    }
+  }
+
+    //double thickness_before = 0;
+    //double EA_vertex = BeamTarget.Slow(InitialBeamEnergy,thickness_before,0);
+
+    // setting up Lorentz Vector from measured trajectories and energies
+    //LV_A.SetVect(PA); LV_p1.SetE(EA_vertex); 
+    //LV_p1.SetVect(P1); LV_p1.SetE(E1); 
+    //LV_p2.SetVect(P2); LV_p1.SetE(E2); 
+
+    // computing Ex from Missing Mass
+    //double EB = LV_A.E() + LV_T.E() - LV_p1.E() - LV_p2.E();   
+    //TVector3 PB = LV_A.Vect() + LV_p1.Vect() - LV_p2.Vect();   
+    //Ex = TMath::Sqrt( EB*EB - PB.Mag2() ) - myQFS->GetNucleusB()->Mass();
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+TVector3 Analysis::InterpolateInPlaneZ(TVector3 V0, TVector3 V1, double Zproj){
+    TVector3 Vproj(-999,-999,-999);
+    double t = (Zproj - V1.Z()) / (V1.Z()-V0.Z());
+    double Xproj= V1.X() + (V1.X()-V0.X()) * t;
+    double Yproj= V1.Y() + (V1.Y()-V0.Y()) * t; 
+    Vproj.SetXYZ(Xproj,Yproj,Zproj);
+    return Vproj;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/Projects/Strasse/strasse_optimized.detector b/Projects/Strasse/strasse_optimized.detector
index 7c381bf8cc1292c143126215d149844800d880d6..8ca1e3ef5a994f58a921b957b56badcc1c3ad9c7 100644
--- a/Projects/Strasse/strasse_optimized.detector
+++ b/Projects/Strasse/strasse_optimized.detector
@@ -90,7 +90,7 @@ Strasse Inner
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%1
 Strasse Outer
   Radius= @OuterRadius mm
-  Z= 91.0 mm
+  Z= 78.0 mm
   Phi= @OuterPhi deg
   Shift= @OuterShift mm
 
diff --git a/Projects/Strasse/strasse_ref.detector b/Projects/Strasse/strasse_ref.detector
index 8789c5858e4bc6c4e565fe2ee3046981ec74bd97..9ea0d4fc007d1ab5886a9eda3fb4e32a3cd79112 100644
--- a/Projects/Strasse/strasse_ref.detector
+++ b/Projects/Strasse/strasse_ref.detector
@@ -43,9 +43,17 @@ Strasse Info
   Outer_PCB_Thickness= 1.6 mm
   Outer_Wafer_TransverseStrips= 605
   Outer_Wafer_LongitudinalStrips= 325
+  % all radius are external, internal deduced from thickness
   Chamber_Thickness= 3 mm
-  Chamber_Length= 500 mm
-  Chamber_Radius= 100 mm
+  Chamber_Cylinder_Length= 360 mm
+  Chamber_Radius= 180 mm
+  Chamber_ExitTube_Radius= 79.5 mm 
+  Chamber_ExitTube_Length= 100 mm
+  Chamber_Flange_Inner_Radius= 50 mm
+  Chamber_Sphere_Radius= 220 mm 
+  Chamber_Sphere_Shift= 60 mm
+
+
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%1
 Alias InnerShift
@@ -83,7 +91,7 @@ Strasse Inner
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%1
 Strasse Outer
   Radius= @OuterRadius mm
-  Z= 91.0 mm
+  Z= 78.0 mm
   Phi= @OuterPhi deg
   Shift= @OuterShift mm
 
@@ -92,6 +100,6 @@ Strasse Chamber
   Z= -30 mm
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-Catana Dummy
- Z= 300 mm
+%Catana Dummy
+% Z= 300 mm