geometry update

Author: pkurash

Detectors/Upgrades/ALICE3/FVD/base/include/FVDBase/FVDBaseParam.h

@@ -20,17 +20,17 @@ namespace o2
 namespace fvd
 {
 struct FVDBaseParam : public o2::conf::ConfigurableParamHelper<FVDBaseParam> {
-  static constexpr int nCellA = 48; 
-  static constexpr int nCellC = 40; //24
-  static constexpr int nRingsA = 6;
-  static constexpr int nRingsC = 5; //3
+  static constexpr int nCellA = 40; //24
+  static constexpr int nCellC = 48; 
+  static constexpr int nRingsA = 5; //3
+  static constexpr int nRingsC = 6;
 
   static constexpr float dzScint =  4.;
-  static constexpr float rRingsA[int(nCellA/8)+1] = {3.5, 14.8, 22.8, 37.3, 48.5, 59.8, 71.};
-  static constexpr float rRingsC[int(nCellC/8)+1] = {3., 14.8, 26.6, 38.4, 50.2, 62.};
+  static constexpr float rRingsA[int(nCellA/8)+1] = {3., 14.8, 26.6, 38.4, 50.2, 62.};
+  static constexpr float rRingsC[int(nCellC/8)+1] = {3.5, 14.8, 22.8, 37.3, 48.5, 59.8, 71.};
 
-  static constexpr float zModA = 1950;
-  static constexpr float zModC = -1700;
+  static constexpr float zModA = 1700;
+  static constexpr float zModC = -1950;
 
   O2ParamDef(FVDBaseParam, "FVDBase");
 };

Detectors/Upgrades/ALICE3/FVD/simulation/src/Detector.cxx

@@ -225,7 +225,7 @@ void Detector::buildModules()
   TGeoVolumeAssembly *vFVDA = buildModuleA();
   TGeoVolumeAssembly *vFVDC = buildModuleC();
 
-  vCave->AddNode(vFVDA, 0, new TGeoTranslation(0., 0., FVDBaseParam::zModA));
+  vCave->AddNode(vFVDA, 1, new TGeoTranslation(0., 0., FVDBaseParam::zModA));
   vCave->AddNode(vFVDC, 1, new TGeoTranslation(0., 0., FVDBaseParam::zModC));
 }