extension of barrel volume to avoid extrusion of FOCAL

Author: amorsch

Detectors/Passive/src/Cave.cxx

@@ -85,23 +85,27 @@ void Cave::ConstructGeometry()
   shCaveTR1->DefineSection(0, -706. - 8.6, 0., 790.5);
   shCaveTR1->DefineSection(1, 707. + 7.6, 0., 790.5);
   TGeoTube* shCaveTR2 = new TGeoTube("shCaveTR2", 0., 150., 110.);
+  TGeoTube* shCaveTR3 = new TGeoTube("shCaveTR3", 0., 80., 75.);
 
   TGeoTranslation* transCaveTR2 = new TGeoTranslation("transTR2", 0, 30., -505. - 110.);
+  TGeoTranslation* transCaveTR3 = new TGeoTranslation("transTR3", 0, 30., 714.6 + 75.);
   transCaveTR2->RegisterYourself();
-  TGeoCompositeShape* shCaveTR = new TGeoCompositeShape("shCaveTR", "shCaveTR1-shCaveTR2:transTR2");
+  transCaveTR3->RegisterYourself();
+
+  TGeoCompositeShape* shCaveTR = new TGeoCompositeShape("shCaveTR", "shCaveTR1-shCaveTR2:transTR2+shCaveTR3:transTR3");
   TGeoVolume* voBarrel = new TGeoVolume("barrel", shCaveTR, kMedAir);
   cavevol->AddNode(voBarrel, 1, new TGeoTranslation(0., -30., 0.));
   if (mHasRB24) { // should be not true only for alice 3
     // mother volume for RB24 side (FDD, Compensator)
-    const Float_t kRB24CL = 2. * 597.9;
+    const Float_t kRB24CL = 2. * 597.9 - 150.;
     auto shCaveRB24 = new TGeoPcon(0., 360., 6);
-    Float_t z0 = kRB24CL / 2 + 714.6;
+    Float_t z0 = kRB24CL / 2 + 714.6 + 150.;
     shCaveRB24->DefineSection(0, -kRB24CL / 2., 0., 105.);
     shCaveRB24->DefineSection(1, -z0 + 1705., 0., 105.);
     shCaveRB24->DefineSection(2, -z0 + 1705., 0., 14.5);
-    shCaveRB24->DefineSection(3, -z0 + 1880., 0., 14.5);
-    shCaveRB24->DefineSection(4, -z0 + 1880., 0., 40.0);
-    shCaveRB24->DefineSection(5, kRB24CL / 2, 0., 40.0);
+    shCaveRB24->DefineSection(3, -z0 + 1878, 0., 14.5);
+    shCaveRB24->DefineSection(4, -z0 + 1878., 0., 40.0);
+    shCaveRB24->DefineSection(5, kRB24CL / 2., 0., 40.0);
 
     TGeoVolume* caveRB24 = new TGeoVolume("caveRB24", shCaveRB24, kMedAir);
     caveRB24->SetVisibility(0);