[FOCAL-100] Porting the beam pipe for run 4 (around FOCAL) (#13772)

* Porting the beam pipe for run 4 (around FOCAL)

Author: hahassan7

Detectors/Passive/CMakeLists.txt

@@ -15,6 +15,7 @@ o2_add_library(DetectorsPassive
                        src/Dipole.cxx
                        src/Compensator.cxx
                        src/Pipe.cxx
+                       src/PipeRun4.cxx
                        src/Magnet.cxx
                        src/PassiveContFact.cxx
                        src/FrameStructure.cxx
@@ -32,6 +33,7 @@ o2_target_root_dictionary(DetectorsPassive
                                   include/DetectorsPassive/Magnet.h
                                   include/DetectorsPassive/PassiveContFact.h
                                   include/DetectorsPassive/Pipe.h
+                                  include/DetectorsPassive/PipeRun4.h
                                   include/DetectorsPassive/FrameStructure.h
                                   include/DetectorsPassive/Shil.h
                                   include/DetectorsPassive/Hall.h

Detectors/Passive/include/DetectorsPassive/PipeRun4.h

@@ -0,0 +1,63 @@
+// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
+// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
+// All rights not expressly granted are reserved.
+//
+// This software is distributed under the terms of the GNU General Public
+// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
+//
+// In applying this license CERN does not waive the privileges and immunities
+// granted to it by virtue of its status as an Intergovernmental Organization
+// or submit itself to any jurisdiction.
+
+#ifndef ALICEO2_PASSIVE_PIPERUN4_H
+#define ALICEO2_PASSIVE_PIPERUN4_H
+
+#include "DetectorsPassive/PassiveBase.h"
+#include "Rtypes.h" // for PipeRun4::Class, ClassDef, PipeRun4::Streamer
+
+class TGeoPcon;
+
+namespace o2
+{
+namespace passive
+{
+class PipeRun4 : public PassiveBase
+{
+ public:
+  PipeRun4(const char* name, const char* Title = "Alice Pipe", float rho = 0.f, float thick = 0.f);
+  PipeRun4();
+
+  ~PipeRun4() override;
+  void ConstructGeometry() override;
+
+  /// Clone this object (used in MT mode only)
+  FairModule* CloneModule() const override;
+
+  float getRmin() const { return mBePipeRmax - mBePipeThick; }
+  float getRmax() const { return mBePipeRmax; }
+  float getWidth() const { return mBePipeThick; }
+  float getDz() const { return mIpHLength; }
+
+ private:
+  void createMaterials();
+  PipeRun4(const PipeRun4& orig);
+  PipeRun4& operator=(const PipeRun4&);
+
+  TGeoPcon* makeMotherFromTemplate(const TGeoPcon* shape, int imin = -1, int imax = -1, float r0 = 0.,
+                                   int nz = -1);
+  TGeoPcon* makeInsulationFromTemplate(TGeoPcon* shape);
+  TGeoVolume* makeBellow(const char* ext, int nc, float rMin, float rMax, float dU, float rPlie,
+                         float dPlie);
+  TGeoVolume* makeBellowCside(const char* ext, int nc, float rMin, float rMax, float rPlie, float dPlie);
+
+  TGeoVolume* makeSupportBar(const char* tag, float Rin, float Rout, float length, float skinLength);
+
+  float mBePipeRmax = 0.;  // outer diameter of the Be section
+  float mBePipeThick = 0.; // Be section thickness
+  float mIpHLength = 0.;   // half length of the beampipe around the IP // FixMe: up to now, hardcoded to 57.25cm
+
+  ClassDefOverride(PipeRun4, 1);
+};
+} // namespace passive
+} // namespace o2
+#endif // ALICEO2_PASSIVE_PIPERUN4_H

Detectors/Passive/src/PassiveLinkDef.h

@@ -35,6 +35,7 @@
 #pragma link C++ class o2::passive::Cave + ;
 #pragma link C++ class o2::passive::PassiveContFact + ;
 #pragma link C++ class o2::passive::Pipe + ;
+#pragma link C++ class o2::passive::PipeRun4 + ;
 #pragma link C++ class o2::passive::FrameStructure + ;
 #pragma link C++ class o2::passive::Shil + ;
 #pragma link C++ class o2::passive::Hall + ;