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Shil.cxx
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1535 lines (1416 loc) · 61.7 KB
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// 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.
#include <DetectorsBase/Detector.h>
#include <DetectorsPassive/Shil.h>
#include <DetectorsBase/MaterialManager.h>
#include <TGeoCompositeShape.h>
#include <TGeoCone.h>
#include <TGeoManager.h>
#include <TGeoMatrix.h>
#include <TGeoPcon.h>
#include <TGeoTube.h>
#include <TGeoVolume.h>
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <cassert>
using namespace o2::passive;
#define kDegrad TMath::DegToRad()
Shil::~Shil() = default;
Shil::Shil() : PassiveBase("SHIL", "") {}
Shil::Shil(const char* name, const char* Title) : PassiveBase(name, Title) {}
Shil::Shil(const Shil& rhs) = default;
Shil& Shil::operator=(const Shil& rhs)
{
// self assignment
if (this == &rhs) {
return *this;
}
// base class assignment
PassiveBase::operator=(rhs);
return *this;
}
void InvertPcon(TGeoPcon* pcon)
{
//
// z -> -z
//
Int_t nz = pcon->GetNz();
Double_t* z = new Double_t[nz];
Double_t* rmin = new Double_t[nz];
Double_t* rmax = new Double_t[nz];
Double_t* z0 = pcon->GetZ();
Double_t* rmin0 = pcon->GetRmin();
Double_t* rmax0 = pcon->GetRmax();
for (Int_t i = 0; i < nz; i++) {
z[i] = z0[i];
rmin[i] = rmin0[i];
rmax[i] = rmax0[i];
}
for (Int_t i = 0; i < nz; i++) {
Int_t j = nz - i - 1;
pcon->DefineSection(i, -z[j], rmin[j], rmax[j]);
}
delete[] z;
delete[] rmin;
delete[] rmax;
}
namespace
{
TGeoPcon* MakeShapeFromTemplate(const TGeoPcon* pcon, Float_t drMin, Float_t drMax)
{
//
// Returns new shape based on a template changing
// the inner radii by drMin and the outer radii by drMax.
//
Int_t nz = pcon->GetNz();
TGeoPcon* cpcon = new TGeoPcon(0., 360., nz);
for (Int_t i = 0; i < nz; i++) {
cpcon->DefineSection(i, pcon->GetZ(i), pcon->GetRmin(i) + drMin, pcon->GetRmax(i) + drMax);
}
return cpcon;
}
} // namespace
void Shil::ConstructGeometry()
{
createMaterials();
//
// The geometry of the small angle absorber "Beam Shield"
//
//
// The top volume
//
TGeoVolume* top = gGeoManager->GetVolume("cave");
Float_t dz, dr, z, rmax;
// Rotations
TGeoRotation* rot000 = new TGeoRotation("rot000", 90., 0., 90., 90., 0., 0.);
TGeoRotation* rot090 = new TGeoRotation("rot090", 90., 90., 90., 180., 0., 0.);
TGeoRotation* rot180 = new TGeoRotation("rot180", 90., 180., 90., 270., 0., 0.);
TGeoRotation* rot270 = new TGeoRotation("rot270", 90., 270., 90., 0., 0., 0.);
Float_t alhc = 0.794;
TGeoRotation* rotxzlhc = new TGeoRotation("rotxzlhc", 0., -alhc, 0.);
TGeoRotation* rotlhc = new TGeoRotation("rotlhc", 0., alhc, 0.);
//
// Media
//
auto& matmgr = o2::base::MaterialManager::Instance();
auto kMedNiW = matmgr.getTGeoMedium("SHIL_Ni/W0");
auto kMedNiWsh = matmgr.getTGeoMedium("SHIL_Ni/W3");
//
auto kMedSteel = matmgr.getTGeoMedium("SHIL_ST_C0");
auto kMedSteelSh = matmgr.getTGeoMedium("SHIL_ST_C3");
//
auto kMedAir = matmgr.getTGeoMedium("SHIL_AIR_C0");
auto kMedAirMu = matmgr.getTGeoMedium("SHIL_AIR_MUON");
//
auto kMedPb = matmgr.getTGeoMedium("SHIL_PB_C0");
auto kMedPbSh = matmgr.getTGeoMedium("SHIL_PB_C2");
//
auto kMedConcSh = matmgr.getTGeoMedium("SHIL_CC_C2");
//
auto kMedCastiron = matmgr.getTGeoMedium("SHIL_CAST_IRON0");
auto kMedCastironSh = matmgr.getTGeoMedium("SHIL_CAST_IRON2");
//
const Float_t kDegRad = TMath::Pi() / 180.;
const Float_t kAngle02 = TMath::Tan(2.00 * kDegRad);
const Float_t kAngle0071 = TMath::Tan(0.71 * kDegRad);
///////////////////////////////////
// FA Tungsten Tail //
// Drawing ALIP2A__0049 //
// Drawing ALIP2A__0111 //
///////////////////////////////////
//
// The tail as built is shorter than in drawing ALIP2A__0049.
// The CDD data base has to be updated !
//
// Inner radius at the entrance of the flange
Float_t rInFaWTail1 = 13.98 / 2.;
// Outer radius at the entrance of the flange
Float_t rOuFaWTail1 = 52.00 / 2.;
// Outer radius at the end of the section inside the FA
Float_t rOuFaWTail2 = 35.27 / 2.;
// Length of the Flange section inside the FA
Float_t dzFaWTail1 = 6.00;
// Length of the Flange section ouside the FA
Float_t dzFaWTail2 = 12.70;
// Inner radius at the end of the section inside the FA
Float_t rInFaWTail2 = rInFaWTail1 + dzFaWTail1 * kAngle0071;
// Inner radius at the end of the flange
Float_t rInFaWTail3 = rInFaWTail2 + dzFaWTail2 * kAngle0071;
// Outer radius at the end of the flange
Float_t rOuFaWTail3 = rOuFaWTail2 + dzFaWTail2 * kAngle02;
// Outer radius of the recess for station 1
Float_t rOuFaWTailR = 30.8 / 2.;
// Length of the recess
Float_t dzFaWTailR = 36.00;
// Inner radiues at the end of the recess
Float_t rInFaWTail4 = rInFaWTail3 + dzFaWTailR * kAngle0071;
// Outer radius at the end of the recess
Float_t rOuFaWTail4 = rOuFaWTail3 + dzFaWTailR * kAngle02;
// Inner radius of the straight section
Float_t rInFaWTailS = 22.30 / 2.;
// Length of the bulge
Float_t dzFaWTailB = 13.0;
// Outer radius at the end of the bulge
Float_t rOuFaWTailB = rOuFaWTail4 + dzFaWTailB * kAngle02;
// Outer radius at the end of the tail
Float_t rOuFaWTailE = 31.6 / 2.;
// Total length of the tail
const Float_t dzFaWTail = 70.7 - 6.;
TGeoPcon* shFaWTail = new TGeoPcon(0., 360., 8);
z = 0.;
// Flange section inside FA (moved to ABSO)
// shFaWTail->DefineSection(0, z, rInFaWTail1, rOuFaWTail1);
// z += dzFaWTail1;
// shFaWTail->DefineSection(1, z, rInFaWTail2, rOuFaWTail1);
shFaWTail->DefineSection(0, z, rInFaWTail2, rOuFaWTail2);
// Flange section outside FA
z += dzFaWTail2;
shFaWTail->DefineSection(1, z, rInFaWTail3, rOuFaWTail3);
shFaWTail->DefineSection(2, z, rInFaWTail3, rOuFaWTailR);
// Recess Station 1
z += dzFaWTailR;
shFaWTail->DefineSection(3, z, rInFaWTail4, rOuFaWTailR);
shFaWTail->DefineSection(4, z, rInFaWTailS, rOuFaWTail4);
// Bulge
z += dzFaWTailB;
shFaWTail->DefineSection(5, z, rInFaWTailS, rOuFaWTailB);
shFaWTail->DefineSection(6, z, rInFaWTailS, rOuFaWTailE);
// End
z = dzFaWTail;
shFaWTail->DefineSection(7, z, rInFaWTailS, rOuFaWTailE);
TGeoVolume* voFaWTail = new TGeoVolume("YFaWTail", shFaWTail, kMedNiW);
//
// Define an inner region with higher transport cuts
TGeoPcon* shFaWTailI = new TGeoPcon(0., 360., 4);
z = 0.;
dr = 3.5;
shFaWTailI->DefineSection(0, z, rInFaWTail2, rInFaWTail2 + dr);
z += (dzFaWTail2 + dzFaWTailR);
shFaWTailI->DefineSection(1, z, rInFaWTail4, rInFaWTail4 + dr);
shFaWTailI->DefineSection(2, z, rInFaWTailS, rInFaWTailS + dr);
z = dzFaWTail;
shFaWTailI->DefineSection(3, z, rInFaWTailS, rInFaWTailS + dr);
TGeoVolume* voFaWTailI = new TGeoVolume("YFaWTailI", shFaWTailI, kMedNiWsh);
voFaWTail->AddNode(voFaWTailI, 1, gGeoIdentity);
///////////////////////////////////
// //
// Recess Station 1 //
// Drawing ALIP2A__0260 //
///////////////////////////////////
///////////////////////////////////
// FA W-Ring 2 //
// Drawing ALIP2A__0220 //
///////////////////////////////////
const Float_t kFaWring2Rinner = 15.41;
const Float_t kFaWring2Router = 18.40;
const Float_t kFaWring2HWidth = 3.75;
const Float_t kFaWring2Cutoffx = 3.35;
const Float_t kFaWring2Cutoffy = 3.35;
TGeoTubeSeg* shFaWring2a = new TGeoTubeSeg(kFaWring2Rinner, kFaWring2Router, kFaWring2HWidth, 0., 90.);
shFaWring2a->SetName("shFaWring2a");
TGeoBBox* shFaWring2b = new TGeoBBox(kFaWring2Router / 2., kFaWring2Router / 2., kFaWring2HWidth);
shFaWring2b->SetName("shFaWring2b");
TGeoTranslation* trFaWring2b = new TGeoTranslation("trFaWring2b", kFaWring2Router / 2. + kFaWring2Cutoffx,
kFaWring2Router / 2. + kFaWring2Cutoffy, 0.);
trFaWring2b->RegisterYourself();
TGeoCompositeShape* shFaWring2 = new TGeoCompositeShape("shFaWring2", "(shFaWring2a)*(shFaWring2b:trFaWring2b)");
TGeoVolume* voFaWring2 = new TGeoVolume("YFA_WRING2", shFaWring2, kMedNiW);
///////////////////////////////////
// FA W-Ring 3 //
// Drawing ALIP2A__0219 //
///////////////////////////////////
const Float_t kFaWring3Rinner = 15.41;
const Float_t kFaWring3Router = 18.40;
const Float_t kFaWring3HWidth = 3.75;
const Float_t kFaWring3Cutoffx = 3.35;
const Float_t kFaWring3Cutoffy = 3.35;
TGeoTubeSeg* shFaWring3a = new TGeoTubeSeg(kFaWring3Rinner, kFaWring3Router, kFaWring3HWidth, 0., 90.);
shFaWring3a->SetName("shFaWring3a");
TGeoBBox* shFaWring3b = new TGeoBBox(kFaWring3Router / 2., kFaWring3Router / 2., kFaWring3HWidth);
shFaWring3b->SetName("shFaWring3b");
TGeoTranslation* trFaWring3b = new TGeoTranslation("trFaWring3b", kFaWring3Router / 2. + kFaWring3Cutoffx,
kFaWring3Router / 2. + kFaWring3Cutoffy, 0.);
trFaWring3b->RegisterYourself();
TGeoCompositeShape* shFaWring3 = new TGeoCompositeShape("shFaWring3", "(shFaWring3a)*(shFaWring3b:trFaWring3b)");
TGeoVolume* voFaWring3 = new TGeoVolume("YFA_WRING3", shFaWring3, kMedNiW);
///////////////////////////////////
// FA W-Ring 5 //
// Drawing ALIP2A__0221 //
///////////////////////////////////
const Float_t kFaWring5Rinner = 15.41;
const Float_t kFaWring5Router = 18.67;
const Float_t kFaWring5HWidth = 1.08;
TGeoVolume* voFaWring5 =
new TGeoVolume("YFA_WRING5", new TGeoTube(kFaWring5Rinner, kFaWring5Router, kFaWring5HWidth), kMedNiW);
//
// Position the rings in the assembly
//
TGeoVolumeAssembly* asFaExtraShield = new TGeoVolumeAssembly("YCRE");
// Distance between rings
const Float_t kFaDWrings = 1.92;
//
dz = 0.;
dz += kFaWring2HWidth;
asFaExtraShield->AddNode(voFaWring2, 1, new TGeoCombiTrans(0., 0., dz, rot180));
asFaExtraShield->AddNode(voFaWring2, 2, new TGeoCombiTrans(0., 0., dz, rot000));
dz += kFaWring2HWidth;
dz += kFaDWrings;
dz += kFaWring3HWidth;
asFaExtraShield->AddNode(voFaWring3, 1, new TGeoCombiTrans(0., 0., dz, rot090));
asFaExtraShield->AddNode(voFaWring3, 2, new TGeoCombiTrans(0., 0., dz, rot270));
dz += kFaWring3HWidth;
dz += kFaWring5HWidth;
asFaExtraShield->AddNode(voFaWring5, 1, new TGeoTranslation(0., 0., dz));
dz += kFaWring5HWidth;
dz += kFaWring3HWidth;
asFaExtraShield->AddNode(voFaWring3, 3, new TGeoCombiTrans(0., 0., dz, rot180));
asFaExtraShield->AddNode(voFaWring3, 4, new TGeoCombiTrans(0., 0., dz, rot000));
dz += kFaWring3HWidth;
dz += kFaDWrings;
dz += kFaWring2HWidth;
asFaExtraShield->AddNode(voFaWring2, 3, new TGeoCombiTrans(0., 0., dz, rot090));
asFaExtraShield->AddNode(voFaWring2, 4, new TGeoCombiTrans(0., 0., dz, rot270));
dz += kFaWring2HWidth;
///////////////////////////////////////
// SAA1 //
///////////////////////////////////////
///////////////////////////////////////
// FA/SAA1 W Joint //
// Drawing ALIP2A__0060 //
///////////////////////////////////////
// Length of flange FA side
Float_t dzFaSaa1F1 = 2.8;
// Inner radius of flange FA side
Float_t rInFaSaa1F1 = 32.0 / 2.;
// Outer radius of flange FA side
Float_t rOuFaSaa1F1 = 39.5 / 2.;
// Length of first straight section
Float_t dzFaSaa1S1 = 18.5 - dzFaSaa1F1;
// Inner radius of first straight section
Float_t rInFaSaa1S1 = 22.3 / 2.;
// Length of 45 deg transition region
Float_t dzFaSaa1T1 = 2.2;
// Inner radius of second straight section
Float_t rInFaSaa1S2 = 17.9 / 2.;
// Length of second straight section
Float_t dzFaSaa1S2 = 10.1;
// Length of flange SAA1 side
// Float_t dzFaSaa1F2 = 4.0;
// Inner radius of flange FA side
Float_t rInFaSaa1F2 = 25.2 / 2.;
// Length of joint
const Float_t dzFaSaa1 = 34.8;
// Outer Radius at the end of the joint
Float_t rOuFaSaa1E = 41.93 / 2.;
TGeoPcon* shFaSaa1 = new TGeoPcon(0., 360., 8);
z = 0;
// Flange FA side
shFaSaa1->DefineSection(0, z, rInFaSaa1F1, rOuFaSaa1F1 - 0.01);
z += dzFaSaa1F1;
shFaSaa1->DefineSection(1, z, rInFaSaa1F1, 40.0);
shFaSaa1->DefineSection(2, z, rInFaSaa1S1, 40.0);
// First straight section
z += dzFaSaa1S1;
shFaSaa1->DefineSection(3, z, rInFaSaa1S1, 40.0);
// 45 deg transition region
z += dzFaSaa1T1;
shFaSaa1->DefineSection(4, z, rInFaSaa1S2, 40.0);
// Second straight section
z += dzFaSaa1S2;
shFaSaa1->DefineSection(5, z, rInFaSaa1S2, 40.0);
shFaSaa1->DefineSection(6, z, rInFaSaa1F2, 40.0);
// Flange SAA1 side
z = dzFaSaa1;
shFaSaa1->DefineSection(7, z, rInFaSaa1F2, rOuFaSaa1E - 0.01);
// Outer 2 deg line
for (Int_t i = 1; i < 7; i++) {
Double_t zp = shFaSaa1->GetZ(i);
Double_t r1 = shFaSaa1->GetRmin(i);
Double_t r2 = 39.5 / 2. + zp * TMath::Tan(2. * kDegRad) - 0.01;
shFaSaa1->DefineSection(i, zp, r1, r2);
}
TGeoVolume* voFaSaa1 = new TGeoVolume("YFASAA1", shFaSaa1, kMedNiWsh);
//
// Outer region with lower transport cuts
TGeoCone* shFaSaa1O =
new TGeoCone(dzFaSaa1 / 2., rOuFaSaa1F1 - 3.5, rOuFaSaa1F1 - 0.01, rOuFaSaa1E - 3.5, rOuFaSaa1E - 0.01);
TGeoVolume* voFaSaa1O = new TGeoVolume("YFASAA1O", shFaSaa1O, kMedNiW);
voFaSaa1->AddNode(voFaSaa1O, 1, new TGeoTranslation(0., 0., dzFaSaa1 / 2.));
///////////////////////////////////
// SAA1 Steel Envelope //
// Drawing ALIP2A__0039 //
///////////////////////////////////
Float_t rOut; // Outer radius
// Thickness of the steel envelope
Float_t dSt = 4.;
// 4 Section
// z-positions
Float_t zSaa1StEnv[5] = {111.2, 113.7, 229.3, 195.0};
// Radii
// 1
Float_t rOuSaa1StEnv1 = 40.4 / 2.;
Float_t rInSaa1StEnv1 = rOuSaa1StEnv1 - dSt - 0.05;
// 2
Float_t rInSaa1StEnv2 = 41.7 / 2.;
Float_t rOuSaa1StEnv2 = rInSaa1StEnv2 + dSt / TMath::Cos(2.0 * kDegRad) - 0.05;
// 3
Float_t rOuSaa1StEnv3 = 57.6 / 2.;
Float_t rInSaa1StEnv3 = rOuSaa1StEnv3 - dSt + 0.05;
// 4
Float_t rInSaa1StEnv4 = 63.4 / 2.;
Float_t rOuSaa1StEnv4 = rInSaa1StEnv4 + dSt / TMath::Cos(1.6 * kDegRad) - 0.05;
// end
Float_t rInSaa1StEnv5 = 74.28 / 2.;
Float_t rOuSaa1StEnv5 = rInSaa1StEnv5 + dSt / TMath::Cos(1.6 * kDegRad) - 0.05;
// Relative starting position
Float_t zSaa1StEnvS = 3.;
TGeoPcon* shSaa1StEnv = new TGeoPcon(0., 360., 11);
// 1st Section
z = zSaa1StEnvS;
shSaa1StEnv->DefineSection(0, z, rInSaa1StEnv1, rOuSaa1StEnv1);
z += (zSaa1StEnv[0] - dSt);
shSaa1StEnv->DefineSection(1, z, rInSaa1StEnv1, rOuSaa1StEnv1);
// 1 - 2
shSaa1StEnv->DefineSection(2, z, rInSaa1StEnv1, rOuSaa1StEnv2);
z += dSt;
shSaa1StEnv->DefineSection(3, z, rInSaa1StEnv1, rOuSaa1StEnv2);
// 2nd Section
shSaa1StEnv->DefineSection(4, z, rInSaa1StEnv2, rOuSaa1StEnv2);
z += zSaa1StEnv[1];
shSaa1StEnv->DefineSection(5, z, rInSaa1StEnv3, rOuSaa1StEnv3);
// 3rd Section
z += (zSaa1StEnv[2] - dSt);
shSaa1StEnv->DefineSection(6, z, rInSaa1StEnv3, rOuSaa1StEnv3);
// 3 - 4
shSaa1StEnv->DefineSection(7, z, rInSaa1StEnv3, rOuSaa1StEnv4);
z += dSt;
shSaa1StEnv->DefineSection(8, z, rInSaa1StEnv3, rOuSaa1StEnv4);
// 4th Section
shSaa1StEnv->DefineSection(9, z, rInSaa1StEnv4, rOuSaa1StEnv4);
z += zSaa1StEnv[3];
shSaa1StEnv->DefineSection(10, z, rInSaa1StEnv5, rOuSaa1StEnv5);
TGeoVolume* voSaa1StEnv = new TGeoVolume("YSAA1_SteelEnvelope", shSaa1StEnv, kMedSteel);
///////////////////////////////////
// SAA1 W-Pipe //
// Drawing ALIP2A__0059 //
///////////////////////////////////
//
// Flange FA side
// Length of first section
Float_t dzSaa1WPipeF1 = 0.9;
// Outer radius
Float_t rOuSaa1WPipeF1 = 24.5 / 2.;
// Inner Radius
Float_t rInSaa1WPipeF1 = 22.0 / 2.;
// Length of second section
Float_t dzSaa1WPipeF11 = 2.1;
// Inner Radius
Float_t rInSaa1WPipeF11 = 18.5 / 2.;
//
// Central tube
// Length
Float_t dzSaa1WPipeC = 111.2;
// Inner Radius at the end
Float_t rInSaa1WPipeC = 22.0 / 2.;
// Outer Radius
Float_t rOuSaa1WPipeC = 31.9 / 2.;
//
// Flange SAA2 Side
// Length
Float_t dzSaa1WPipeF2 = 6.0;
// Outer radius
Float_t rOuSaa1WPipeF2 = 41.56 / 2.;
//
TGeoPcon* shSaa1WPipe = new TGeoPcon(0., 360., 8);
z = 0.;
// Flange FA side first section
shSaa1WPipe->DefineSection(0, z, rInSaa1WPipeF1, rOuSaa1WPipeF1);
z += dzSaa1WPipeF1;
shSaa1WPipe->DefineSection(1, z, rInSaa1WPipeF1, rOuSaa1WPipeF1);
// Flange FA side second section
shSaa1WPipe->DefineSection(2, z, rInSaa1WPipeF11, rOuSaa1WPipeF1);
z += dzSaa1WPipeF11;
shSaa1WPipe->DefineSection(3, z, rInSaa1WPipeF11, rOuSaa1WPipeF1);
// Central Section
shSaa1WPipe->DefineSection(4, z, rInSaa1WPipeF11, rOuSaa1WPipeC);
z += dzSaa1WPipeC;
shSaa1WPipe->DefineSection(5, z, rInSaa1WPipeC, rOuSaa1WPipeC);
// Flange SAA2 side
shSaa1WPipe->DefineSection(6, z, rInSaa1WPipeC, rOuSaa1WPipeF2);
z += dzSaa1WPipeF2;
shSaa1WPipe->DefineSection(7, z, rInSaa1WPipeC, rOuSaa1WPipeF2);
TGeoVolume* voSaa1WPipe = new TGeoVolume("YSAA1_WPipe", shSaa1WPipe, kMedNiW);
//
// Inner region with higher transport cuts
TGeoTube* shSaa1WPipeI = new TGeoTube(rInSaa1WPipeC, rOuSaa1WPipeC, dzSaa1WPipeC / 2.);
TGeoVolume* voSaa1WPipeI = new TGeoVolume("YSAA1_WPipeI", shSaa1WPipeI, kMedNiWsh);
voSaa1WPipe->AddNode(voSaa1WPipeI, 1, new TGeoTranslation(0., 0., dzSaa1WPipeF1 + dzSaa1WPipeF11 + dzSaa1WPipeC / 2));
///////////////////////////////////
// SAA1 Pb Components //
// Drawing ALIP2A__0078 //
///////////////////////////////////
//
// Inner angle
Float_t tanAlpha = TMath::Tan(1.69 / 2. * kDegRad);
Float_t tanBeta = TMath::Tan(3.20 / 2. * kDegRad);
//
// 1st Section 2deg opening cone
// Length
Float_t dzSaa1PbComp1 = 100.23;
// Inner radius at entrance
Float_t rInSaa1PbComp1 = 22.0 / 2.; // It's 21 cm diameter in the drawing. Is this a typo ??!!
// Outer radius at entrance
Float_t rOuSaa1PbComp1 = 42.0 / 2.;
//
// 2nd Section: Straight Section
// Length
Float_t dzSaa1PbComp2 = 236.77;
// Inner radius
Float_t rInSaa1PbComp2 = rInSaa1PbComp1 + dzSaa1PbComp1 * tanAlpha;
// Outer radius
Float_t rOuSaa1PbComp2 = 49.0 / 2.;
//
// 3rd Section: 1.6deg opening cone until bellow
// Length
Float_t dzSaa1PbComp3 = 175.6;
// Inner radius
Float_t rInSaa1PbComp3 = rInSaa1PbComp2 + dzSaa1PbComp2 * tanAlpha;
// Outer radius
Float_t rOuSaa1PbComp3 = 62.8 / 2.;
//
// 4th Section: Bellow region
Float_t dzSaa1PbComp4 = 26.4;
// Inner radius
Float_t rInSaa1PbComp4 = 37.1 / 2.;
Float_t rInSaa1PbCompB = 43.0 / 2.;
// Outer radius
Float_t rOuSaa1PbComp4 = rOuSaa1PbComp3 + dzSaa1PbComp3 * tanBeta;
//
// 5th Section: Flange SAA2 side
// 1st detail
Float_t dzSaa1PbCompF1 = 4.;
Float_t rOuSaa1PbCompF1 = 74.1 / 2.;
// 2nd detail
Float_t dzSaa1PbCompF2 = 3.;
Float_t rOuSaa1PbCompF2 = 66.0 / 2.;
Float_t rOuSaa1PbCompF3 = 58.0 / 2.;
TGeoPcon* shSaa1PbComp = new TGeoPcon(0., 360., 11);
z = 120.2;
// 2 deg opening cone
shSaa1PbComp->DefineSection(0, z, rInSaa1PbComp1, rOuSaa1PbComp1);
z += dzSaa1PbComp1;
shSaa1PbComp->DefineSection(1, z, rInSaa1PbComp2, rOuSaa1PbComp2);
// Straight section
z += dzSaa1PbComp2;
shSaa1PbComp->DefineSection(2, z, rInSaa1PbComp3, rOuSaa1PbComp2);
// 1.6 deg opening cone
shSaa1PbComp->DefineSection(3, z, rInSaa1PbComp3, rOuSaa1PbComp3);
z += dzSaa1PbComp3;
shSaa1PbComp->DefineSection(4, z, rInSaa1PbComp4, rOuSaa1PbComp4);
// Bellow region until outer flange
shSaa1PbComp->DefineSection(5, z, rInSaa1PbCompB, rOuSaa1PbComp4);
z += (dzSaa1PbComp4 - dzSaa1PbCompF1 - dzSaa1PbCompF2);
shSaa1PbComp->DefineSection(6, z, rInSaa1PbCompB, rOuSaa1PbCompF1);
shSaa1PbComp->DefineSection(7, z, rInSaa1PbCompB, rOuSaa1PbCompF2);
// Flange first step
z += dzSaa1PbCompF1;
shSaa1PbComp->DefineSection(8, z, rInSaa1PbCompB, rOuSaa1PbCompF2);
shSaa1PbComp->DefineSection(9, z, rInSaa1PbCompB, rOuSaa1PbCompF3);
// Flange second step
z += dzSaa1PbCompF2;
shSaa1PbComp->DefineSection(10, z, rInSaa1PbCompB, rOuSaa1PbCompF3);
TGeoVolume* voSaa1PbComp = new TGeoVolume("YSAA1_PbComp", shSaa1PbComp, kMedPb);
//
// Inner region with higher transport cuts
TGeoPcon* shSaa1PbCompI = MakeShapeFromTemplate(shSaa1PbComp, 0., -3.);
TGeoVolume* voSaa1PbCompI = new TGeoVolume("YSAA1_PbCompI", shSaa1PbCompI, kMedPbSh);
voSaa1PbComp->AddNode(voSaa1PbCompI, 1, gGeoIdentity);
///////////////////////////////////
// SAA1 W-Cone //
// Drawing ALIP2A__0058 //
///////////////////////////////////
// Length of the Cone
Float_t dzSaa1WCone = 52.9;
// Inner and outer radii
Float_t rInSaa1WCone1 = 20.4;
Float_t rOuSaa1WCone1 = rInSaa1WCone1 + 0.97;
Float_t rOuSaa1WCone2 = rInSaa1WCone1 + 2.80;
// relative z-position
Float_t zSaa1WCone = 9.3;
TGeoPcon* shSaa1WCone = new TGeoPcon(0., 360., 2);
z = zSaa1WCone;
shSaa1WCone->DefineSection(0, z, rInSaa1WCone1, rOuSaa1WCone1);
z += dzSaa1WCone;
shSaa1WCone->DefineSection(1, z, rInSaa1WCone1, rOuSaa1WCone2);
TGeoVolume* voSaa1WCone = new TGeoVolume("YSAA1_WCone", shSaa1WCone, kMedNiW);
///////////////////////////////////
// SAA1 Steel-Ring //
// Drawing ALIP2A__0040 //
///////////////////////////////////
//
// Length of the ring
Float_t dzSaa1StRing = 4.;
// Inner and outer radius
Float_t rInSaa1String = 33.0;
Float_t rOuSaa1String = 41.1;
// Relative z-position
Float_t zSaa1StRing = 652.2;
TGeoPcon* shSaa1StRing = new TGeoPcon(0., 360., 2);
z = zSaa1StRing;
shSaa1StRing->DefineSection(0, z, rInSaa1String, rOuSaa1String);
z += dzSaa1StRing;
shSaa1StRing->DefineSection(1, z, rInSaa1String, rOuSaa1String);
TGeoVolume* voSaa1StRing = new TGeoVolume("YSAA1_StRing", shSaa1StRing, kMedSteel);
///////////////////////////////////
// SAA1 Inner Tube //
// Drawing ALIP2A__0082 //
///////////////////////////////////
//
// Length of saa2: 659.2 cm
// Length of inner tube: 631.9 cm
// Lenth of bellow cavern: 27.3 cm
// Radius at entrance 18.5/2, d = 0.3
// Radius at exit 37.1/2, d = 0.3
//
Float_t dzSaa1InnerTube = 631.9 / 2.; // Half length of the tube
Float_t rInSaa1InnerTube = 18.2 / 2.; // Radius at entrance
Float_t rOuSaa1InnerTube = 36.8 / 2.; // Radius at exit
Float_t dSaa1InnerTube = 0.2; // Thickness
TGeoVolume* voSaa1InnerTube =
new TGeoVolume("YSAA1_InnerTube", new TGeoCone(dzSaa1InnerTube, rInSaa1InnerTube - dSaa1InnerTube, rInSaa1InnerTube, rOuSaa1InnerTube - dSaa1InnerTube, rOuSaa1InnerTube),
kMedSteelSh);
///////////////////////////////////
// SAA1 Outer Shape //
// Drawing ALIP2A__0107 //
///////////////////////////////////
// Total length
const Float_t dzSaa1 = 659.2;
//
TGeoPcon* shSaa1M = new TGeoPcon(0., 360., 20);
Float_t kSec = 0.2; // security distance to avoid trivial extrusions
Float_t rmin = rInSaa1InnerTube - dSaa1InnerTube - kSec;
rmax = rOuSaa1InnerTube - dSaa1InnerTube - kSec;
z = 0.;
shSaa1M->DefineSection(0, z, rmin, rOuSaa1WPipeF1);
z += dzSaa1WPipeF1;
shSaa1M->DefineSection(1, z, rmin, rOuSaa1WPipeF1);
shSaa1M->DefineSection(2, z, 0., rOuSaa1WPipeF1);
z += dzSaa1WPipeF11;
shSaa1M->DefineSection(3, z, 0., rOuSaa1WPipeF1);
shSaa1M->DefineSection(4, z, 0., rOuSaa1StEnv1);
z = zSaa1WCone;
shSaa1M->DefineSection(5, z, 0., rOuSaa1StEnv1);
shSaa1M->DefineSection(6, z, 0., rOuSaa1WCone1);
z += dzSaa1WCone;
shSaa1M->DefineSection(7, z, 0., rOuSaa1WCone2);
shSaa1M->DefineSection(8, z, 0., rOuSaa1StEnv1);
z = zSaa1StEnv[0] - dSt + zSaa1StEnvS;
shSaa1M->DefineSection(9, z, 0., rOuSaa1StEnv1);
shSaa1M->DefineSection(10, z, 0., rOuSaa1StEnv2);
z += (zSaa1StEnv[1] + dSt);
shSaa1M->DefineSection(11, z, 0., rOuSaa1StEnv3);
z += (zSaa1StEnv[2] - dSt);
shSaa1M->DefineSection(12, z, 0., rOuSaa1StEnv3);
shSaa1M->DefineSection(13, z, 0., rOuSaa1StEnv4);
z += (zSaa1StEnv[3] - dSt + dzSaa1PbCompF1 + dzSaa1PbCompF2 - dzSaa1PbComp4);
Float_t rmaxSaa1 = shSaa1M->GetRmax(13) + (z - shSaa1M->GetZ(13)) * TMath::Tan(1.6 * kDegRad);
shSaa1M->DefineSection(14, z, 0., rmaxSaa1);
shSaa1M->DefineSection(15, z, rmax, rmaxSaa1);
z = zSaa1StRing;
shSaa1M->DefineSection(16, z, rmax + 0.4, rOuSaa1String);
z += dzSaa1PbCompF1;
shSaa1M->DefineSection(17, z, rmax + 0.4, rOuSaa1String);
shSaa1M->DefineSection(18, z, rmax + 0.4, rOuSaa1PbCompF3);
z += dzSaa1PbCompF2;
shSaa1M->DefineSection(19, z, rmax + 0.4, rOuSaa1PbCompF3);
//
// Inner 1.69deg line
for (Int_t i = 2; i < 15; i++) {
Double_t zp = shSaa1M->GetZ(i);
Double_t r2 = shSaa1M->GetRmax(i);
Double_t r1 = rmin + (zp - 0.9) * TMath::Tan(1.686 / 2. * kDegRad) - kSec;
shSaa1M->DefineSection(i, zp, r1, r2);
}
TGeoVolume* voSaa1M = new TGeoVolume("YSAA1M", shSaa1M, kMedAir);
voSaa1M->SetVisibility(0);
///////////////////////////////////
// //
// Recess Station 2 //
// Drawing ALIP2A__0260 //
///////////////////////////////////
///////////////////////////////////
// SAA1 W-Ring 1 //
// Drawing ALIP2A__0217 //
///////////////////////////////////
Float_t saa1Wring1Width = 5.85;
TGeoPcon* shSaa1Wring1 = new TGeoPcon(0., 360., 2);
shSaa1Wring1->DefineSection(0, 0.00, 20.31, 23.175);
shSaa1Wring1->DefineSection(1, saa1Wring1Width, 20.31, 23.400);
TGeoVolume* voSaa1Wring1 = new TGeoVolume("YSAA1_WRING1", shSaa1Wring1, kMedNiW);
///////////////////////////////////
// SAA1 W-Ring 2 //
// Drawing ALIP2A__0055 //
///////////////////////////////////
Float_t saa1Wring2Rinner = 20.31;
Float_t saa1Wring2Router = 23.40;
Float_t saa1Wring2HWidth = 3.75;
Float_t saa1Wring2Cutoffx = 4.9;
Float_t saa1Wring2Cutoffy = 4.9;
TGeoTubeSeg* shSaa1Wring2a = new TGeoTubeSeg(saa1Wring2Rinner, saa1Wring2Router, saa1Wring2HWidth, 0., 90.);
shSaa1Wring2a->SetName("shSaa1Wring2a");
TGeoBBox* shSaa1Wring2b = new TGeoBBox(saa1Wring2Router / 2., saa1Wring2Router / 2., saa1Wring2HWidth);
shSaa1Wring2b->SetName("shSaa1Wring2b");
TGeoTranslation* trSaa1Wring2b = new TGeoTranslation("trSaa1Wring2b", saa1Wring2Router / 2. + saa1Wring2Cutoffx,
saa1Wring2Router / 2. + saa1Wring2Cutoffy, 0.);
trSaa1Wring2b->RegisterYourself();
TGeoCompositeShape* shSaa1Wring2 =
new TGeoCompositeShape("shSaa1Wring2", "(shSaa1Wring2a)*(shSaa1Wring2b:trSaa1Wring2b)");
TGeoVolume* voSaa1Wring2 = new TGeoVolume("YSAA1_WRING2", shSaa1Wring2, kMedNiW);
///////////////////////////////////
// SAA1 W-Ring 3 //
// Drawing ALIP2A__0216 //
///////////////////////////////////
Float_t saa1Wring3Rinner = 20.31;
Float_t saa1Wring3Router = 23.40;
Float_t saa1Wring3HWidth = 3.75;
Float_t saa1Wring3Cutoffx = 4.50;
Float_t saa1Wring3Cutoffy = 4.50;
TGeoTubeSeg* shSaa1Wring3a = new TGeoTubeSeg(saa1Wring3Rinner, saa1Wring3Router, saa1Wring3HWidth, 0., 90.);
shSaa1Wring3a->SetName("shSaa1Wring3a");
TGeoBBox* shSaa1Wring3b = new TGeoBBox(saa1Wring3Router / 2., saa1Wring3Router / 2., saa1Wring3HWidth);
shSaa1Wring3b->SetName("shSaa1Wring3b");
TGeoTranslation* trSaa1Wring3b = new TGeoTranslation("trSaa1Wring3b", saa1Wring3Router / 2. + saa1Wring3Cutoffx,
saa1Wring3Router / 2. + saa1Wring3Cutoffy, 0.);
trSaa1Wring3b->RegisterYourself();
TGeoCompositeShape* shSaa1Wring3 =
new TGeoCompositeShape("shSaa1Wring3", "(shSaa1Wring3a)*(shSaa1Wring3b:trSaa1Wring3b)");
TGeoVolume* voSaa1Wring3 = new TGeoVolume("YSAA1_WRING3", shSaa1Wring3, kMedNiW);
///////////////////////////////////
// SAA1 W-Ring 4 //
// Drawing ALIP2A__0215 //
///////////////////////////////////
Float_t saa1Wring4Width = 5.85;
TGeoPcon* shSaa1Wring4 = new TGeoPcon(0., 360., 5);
shSaa1Wring4->DefineSection(0, 0.00, 20.31, 23.40);
shSaa1Wring4->DefineSection(1, 1.00, 20.31, 23.40);
shSaa1Wring4->DefineSection(2, 1.00, 20.31, 24.50);
shSaa1Wring4->DefineSection(3, 4.85, 20.31, 24.80);
shSaa1Wring4->DefineSection(4, 5.85, 24.10, 24.80);
TGeoVolume* voSaa1Wring4 = new TGeoVolume("YSAA1_WRING4", shSaa1Wring4, kMedNiW);
///////////////////////////////////
// SAA1 W-Ring 5 //
// Drawing ALIP2A__0218 //
///////////////////////////////////
Float_t saa1Wring5Rinner = 20.31;
Float_t saa1Wring5Router = 23.40;
Float_t saa1Wring5HWidth = 0.85;
TGeoVolume* voSaa1Wring5 =
new TGeoVolume("YSAA1_WRING5", new TGeoTube(saa1Wring5Rinner, saa1Wring5Router, saa1Wring5HWidth), kMedNiW);
//
// Position the rings in the assembly
//
TGeoVolumeAssembly* asSaa1ExtraShield = new TGeoVolumeAssembly("YSAA1ExtraShield");
// Distance between rings
Float_t saa1DWrings = 2.3;
//
dz = -(saa1Wring1Width + 6. * saa1Wring2HWidth + 2. * saa1Wring3HWidth + saa1Wring4Width + 2. * saa1Wring5HWidth +
2. * saa1DWrings) /
2.;
asSaa1ExtraShield->AddNode(voSaa1Wring1, 1, new TGeoTranslation(0., 0., dz));
dz += saa1Wring1Width;
dz += saa1Wring2HWidth;
asSaa1ExtraShield->AddNode(voSaa1Wring2, 1, new TGeoCombiTrans(0., 0., dz, rot000));
asSaa1ExtraShield->AddNode(voSaa1Wring2, 2, new TGeoCombiTrans(0., 0., dz, rot180));
dz += saa1Wring2HWidth;
dz += saa1DWrings;
dz += saa1Wring2HWidth;
asSaa1ExtraShield->AddNode(voSaa1Wring2, 3, new TGeoCombiTrans(0., 0., dz, rot090));
asSaa1ExtraShield->AddNode(voSaa1Wring2, 4, new TGeoCombiTrans(0., 0., dz, rot270));
dz += saa1Wring2HWidth;
dz += saa1Wring5HWidth;
asSaa1ExtraShield->AddNode(voSaa1Wring5, 1, new TGeoTranslation(0., 0., dz));
dz += saa1Wring5HWidth;
dz += saa1Wring2HWidth;
asSaa1ExtraShield->AddNode(voSaa1Wring2, 5, new TGeoCombiTrans(0., 0., dz, rot000));
asSaa1ExtraShield->AddNode(voSaa1Wring2, 6, new TGeoCombiTrans(0., 0., dz, rot180));
dz += saa1Wring2HWidth;
dz += saa1DWrings;
dz += saa1Wring3HWidth;
asSaa1ExtraShield->AddNode(voSaa1Wring3, 1, new TGeoCombiTrans(0., 0., dz, rot090));
asSaa1ExtraShield->AddNode(voSaa1Wring3, 2, new TGeoCombiTrans(0., 0., dz, rot270));
dz += saa1Wring3HWidth;
asSaa1ExtraShield->AddNode(voSaa1Wring4, 1, new TGeoTranslation(0., 0., dz));
dz += saa1Wring4Width;
const Float_t saa1ExtraShieldL = 48;
//
// Assemble SAA1
voSaa1M->AddNode(voSaa1StEnv, 1, gGeoIdentity);
voSaa1M->AddNode(voSaa1WPipe, 1, gGeoIdentity);
voSaa1M->AddNode(voSaa1PbComp, 1, gGeoIdentity);
voSaa1M->AddNode(voSaa1WCone, 1, gGeoIdentity);
voSaa1M->AddNode(voSaa1StRing, 1, gGeoIdentity);
voSaa1M->AddNode(voSaa1InnerTube, 1, new TGeoTranslation(0., 0., dzSaa1InnerTube + 0.9));
TGeoVolumeAssembly* voSaa1 = new TGeoVolumeAssembly("YSAA1");
voSaa1->AddNode(voSaa1M, 1, gGeoIdentity);
///////////////////////////////////////
// SAA1/SAA2 Pb Joint //
// Drawing ALIP2A__0081 //
///////////////////////////////////////
//
// Outer radius
Float_t rOuSaa1Saa2 = 70.0 / 2.;
// Flange SAA1 side
Float_t dzSaa1Saa2F1 = 3.;
Float_t rInSaa1Saa2F1 = 58.5 / 2.;
// 1st Central Section
Float_t dzSaa1Saa2C1 = 19.3;
Float_t rInSaa1Saa2C1 = 42.8 / 2.;
// Transition Region
Float_t dzSaa1Saa2T = 3.3;
// 1st Central Section
Float_t dzSaa1Saa2C2 = 6.2;
Float_t rInSaa1Saa2C2 = 36.2 / 2.;
// Flange SAA2 side
Float_t dzSaa1Saa2F2 = 3.1;
Float_t rInSaa1Saa2F2 = 54.1 / 2.;
// Total length
const Float_t dzSaa1Saa2 = 34.9;
TGeoPcon* shSaa1Saa2Pb = new TGeoPcon(0., 360., 8);
z = 0.;
// Flange SAA1 side
shSaa1Saa2Pb->DefineSection(0, z, rInSaa1Saa2F1, rOuSaa1Saa2);
z += dzSaa1Saa2F1;
shSaa1Saa2Pb->DefineSection(1, z, rInSaa1Saa2F1, rOuSaa1Saa2);
shSaa1Saa2Pb->DefineSection(2, z, rInSaa1Saa2C1, rOuSaa1Saa2);
// Central region 1
z += dzSaa1Saa2C1;
shSaa1Saa2Pb->DefineSection(3, z, rInSaa1Saa2C1, rOuSaa1Saa2);
// 45 deg transition
z += dzSaa1Saa2T;
shSaa1Saa2Pb->DefineSection(4, z, rInSaa1Saa2C2, rOuSaa1Saa2);
z += dzSaa1Saa2C2;
shSaa1Saa2Pb->DefineSection(5, z, rInSaa1Saa2C2, rOuSaa1Saa2);
shSaa1Saa2Pb->DefineSection(6, z, rInSaa1Saa2F2, rOuSaa1Saa2);
z += dzSaa1Saa2F2;
shSaa1Saa2Pb->DefineSection(7, z, rInSaa1Saa2F2, rOuSaa1Saa2);
TGeoVolume* voSaa1Saa2Pb = new TGeoVolume("YSAA1SAA2Pb", shSaa1Saa2Pb, kMedPb);
//
// Mother volume and outer steel envelope
Float_t rOuSaa1Saa2Steel = 36.9;
TGeoPcon* shSaa1Saa2 = MakeShapeFromTemplate(shSaa1Saa2Pb, 0., rOuSaa1Saa2Steel - rOuSaa1Saa2);
TGeoVolume* voSaa1Saa2 = new TGeoVolume("YSAA1SAA2", shSaa1Saa2, kMedSteel);
voSaa1Saa2->AddNode(voSaa1Saa2Pb, 1, gGeoIdentity);
//
// Inner region with higher transport cuts
//
TGeoPcon* shSaa1Saa2I = MakeShapeFromTemplate(shSaa1Saa2Pb, 0., -3.);
TGeoVolume* voSaa1Saa2I = new TGeoVolume("YSAA1_SAA2I", shSaa1Saa2I, kMedPbSh);
voSaa1Saa2Pb->AddNode(voSaa1Saa2I, 1, gGeoIdentity);
///////////////////////////////////////
// SAA2 //
///////////////////////////////////////
///////////////////////////////////
// SAA2 Steel Envelope //
// Drawing ALIP2A__0041 //
///////////////////////////////////
dSt = 4.; // Thickness of steel envelope
// Length of the first section
Float_t dzSaa2StEnv1 = 163.15;
Float_t rInSaa2StEnv1 = 65.8 / 2.;
// Length of the second section
Float_t dzSaa2StEnv2 = 340.35 - 4.;
Float_t rInSaa2StEnv2 = 87.2 / 2.;
// Rel. starting position
Float_t zSaa2StEnv = 3.;
TGeoPcon* shSaa2StEnv = new TGeoPcon(0., 360., 6);
// First Section
z = zSaa2StEnv;
shSaa2StEnv->DefineSection(0, z, rInSaa2StEnv1, rInSaa2StEnv1 + dSt);
z += dzSaa2StEnv1;
shSaa2StEnv->DefineSection(1, z, rInSaa2StEnv1, rInSaa2StEnv1 + dSt);
// Transition region
shSaa2StEnv->DefineSection(2, z, rInSaa2StEnv1, rInSaa2StEnv2 + dSt);
z += dSt;
shSaa2StEnv->DefineSection(3, z, rInSaa2StEnv1, rInSaa2StEnv2 + dSt);
// Second section
shSaa2StEnv->DefineSection(4, z, rInSaa2StEnv2, rInSaa2StEnv2 + dSt);
z += dzSaa2StEnv2;
shSaa2StEnv->DefineSection(5, z, rInSaa2StEnv2, rInSaa2StEnv2 + dSt);
TGeoVolume* voSaa2StEnv = new TGeoVolume("YSAA2_SteelEnvelope", shSaa2StEnv, kMedSteel);
///////////////////////////////////
// SAA2 Pb Ring //
// Drawing ALIP2A__0080 //
// Drawing ALIP2A__0111 //
///////////////////////////////////
//
// Rel. position in z
Float_t zSaa2PbRing = 35.25;
// Length
Float_t dzSaa2PbRing = 65.90;
// Inner radius
Float_t rInSaa2PbRing = 37.00;
// Outer radius at front
Float_t rOuSaa2PbRingF = 42.74;
// Outer Rradius at rear
Float_t rOuSaa2PbRingR = 44.58;
TGeoPcon* shSaa2PbRing = new TGeoPcon(0., 360., 2);
z = zSaa2PbRing;
shSaa2PbRing->DefineSection(0, z, rInSaa2PbRing, rOuSaa2PbRingF);
z += dzSaa2PbRing;
shSaa2PbRing->DefineSection(1, z, rInSaa2PbRing, rOuSaa2PbRingR);
TGeoVolume* voSaa2PbRing = new TGeoVolume("YSAA2_PbRing", shSaa2PbRing, kMedPb);
///////////////////////////////////
// SAA2 Pb Components //
// Drawing ALIP2A__0079 //
///////////////////////////////////
tanAlpha = TMath::Tan(1.89 / 2. * kDegRad);
TGeoPcon* shSaa2PbComp = new TGeoPcon(0., 360., 16);
// Total length
const Float_t dzSaa2PbComp = 512.;
// Length of 1st bellow recess
Float_t dzSaa2PbCompB1 = 24.;
// Length of 2nd bellow recess
Float_t dzSaa2PbCompB2 = 27.;
// Flange on the SAA1 side Detail A
// 1st Step
Float_t dzSaa2PbCompA1 = 1.5;
Float_t rInSaa2PbCompA1 = 43.0 / 2.;
Float_t rOuSaa2PbCompA1 = 53.0 / 2.;
// 2nd Step
Float_t dzSaa2PbCompA2 = 1.5;
Float_t rInSaa2PbCompA2 = 36.8 / 2.;
Float_t rOuSaa2PbCompA2 = rOuSaa2PbCompA1;
// Straight section
Float_t dzSaa2PbCompA3 = 21.0;
Float_t rInSaa2PbCompA3 = rInSaa2PbCompA2;
Float_t rOuSaa2PbCompA3 = 65.2 / 2.;
//
// 1st Section (outer straight, inner 1.89/2. deg opening cone)
// Length
Float_t dzSaa2PbComp1 = 146.15;
// Inner radius at the end
Float_t rInSaa2PbComp1 = rInSaa2PbCompA3 + dzSaa2PbComp1 * tanAlpha;
// Outer radius
Float_t rOuSaa2PbComp1 = rOuSaa2PbCompA3;
//
// 2nd Section (outer straight, inner 1.89/2. deg opening cone)
// Length
Float_t dzSaa2PbComp2 = (dzSaa2PbComp - dzSaa2PbComp1 - dzSaa2PbCompB1 - dzSaa2PbCompB2);
// Inner radius at the end
Float_t rInSaa2PbComp2 = rInSaa2PbComp1 + dzSaa2PbComp2 * tanAlpha;
// Outer radius
Float_t rOuSaa2PbComp2 = 86.6 / 2.;
//
// Flange on the SAA3 side (Detail E)
//
// Straight Section
// Length dzSaa2PbCompB2 - 8.8 = 27 - 8.8 = 18.2
Float_t dzSaa2PbCompE1 = 18.2;
Float_t rInSaa2PbCompE1 = 52.0 / 2.;
Float_t rOuSaa2PbCompE1 = 86.6 / 2.;
// 45 deg transition
Float_t dzSaa2PbCompE2 = 2.7;
// 1st Step
Float_t dzSaa2PbCompE3 = 0.6;
Float_t rInSaa2PbCompE3 = 52.0 / 2. + dzSaa2PbCompE2;
Float_t rOuSaa2PbCompE3 = 83.0 / 2.;
// 2nd Step
Float_t dzSaa2PbCompE4 = 4.0;
Float_t rOuSaa2PbCompE4 = 61.6 / 2.;
// end
Float_t dzSaa2PbCompE5 = 1.5;