Correct z positioning of slats of station 3

[u/mrichter/AliRoot.git] / MUON / AliMUONSlatGeometryBuilder.cxx

diff --git a/MUON/AliMUONSlatGeometryBuilder.cxx b/MUON/AliMUONSlatGeometryBuilder.cxx
index 652c602fea685f5480fe5711e874a54834499158..f728f4cf936c11193263aac066e340e63c1465ba 100644 (file)
--- a/MUON/AliMUONSlatGeometryBuilder.cxx
+++ b/MUON/AliMUONSlatGeometryBuilder.cxx
@@ -314,7 +314,8 @@ void AliMUONSlatGeometryBuilder::CreateGeometry()
        spar2[1] = spar[1];
        spar2[2] = spar[2]; 
        Float_t dzCh3 = dzCh; 
-       Float_t zSlat3 = (i%2 ==0)? -zSlat : zSlat; // seems not that zSlat3 = zSlat4 & 5 refering to plan PQ7EN345-6 ?
+       Float_t dzSlat3 = -0.25; // see drawing PQ7EN345-6 (Delta_slat=80mm instead 85mm)
+       Float_t zSlat3 = (i%2 ==0)? -(zSlat+dzSlat3) : (zSlat+dzSlat3); // seems not that zSlat3 = zSlat4 & 5 refering to plan PQ7EN345-6 ? -> Indeed, fixed J.C.
 
        sprintf(idSlatCh5,"LA%d",i+kNslats3-1);
        detElemId = 509 - (i + kNslats3-1-4);