uncomment rich in xml

src/ForwardRICH_geo.cpp

@@ -155,11 +155,12 @@ static Ref_t createDetector(Detector& desc, xml::Handle_t handle, SensitiveDetec
         if (mRmax > rmax) { rmax = mRmax; }
     }
     rmin = std::max(0., rmin - 0.1*cm);
+    rmax = 2.*halfLength/mirZ*rmax;
     Cone env1(halfLength, rmin, tRmax1 + 0.1*cm , rmin, rmax + 0.1*cm);
     // disk for detection plane
-    Tube env2(std::max(0., pRmin - 0.1*cm), pRmax + 0.1*cm, pThick + 0.1*cm, 0., 2.*M_PI);
+    Tube env2(std::max(0., pRmin - 0.1*cm), pRmax + pTol + pGap + 0.1*cm, pThick + 0.1*cm, 0., 2.*M_PI);
 
-    UnionSolid envShape(env1, env2, Position(0., 0., pZ + pThick/2.));
+    UnionSolid envShape(env1, env2, Position(0., 0., -halfLength + pZ + pThick/2.));
 
     Volume envVol(detName + "_envelope", envShape, desc.material("AirOptical"));
     // envVol.setVisAttributes(desc.visAttributes(detElem.visStr()));