STRUCT/AliSHILv3.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id $ */
  17
  18 //-------------------------------------------------------------------------
  19 // The small angle absorber SAA (beam shield)
  20 // Author: A.Morsch
  21 // andreas.morsch@cern.ch
  22 //-------------------------------------------------------------------------
  23
  24 #include <TVirtualMC.h>
  25 #include <TArrayI.h>
  26 #include <TGeoVolume.h>
  27 #include <TGeoTube.h>
  28 #include <TGeoManager.h>
  29 #include <TGeoMatrix.h>
  30 #include <TGeoCompositeShape.h>
  31 #include <TGeoBBox.h>
  32 #include <TGeoPgon.h>
  33 #include <TGeoCone.h>
  34
  35 #include "AliSHILv3.h"
  36 #include "AliConst.h"
  37 #include "AliLog.h"
  38
  39 ClassImp(AliSHILv3)
  40
  41 //_____________________________________________________________________________
  42 AliSHILv3::AliSHILv3()
  43 {
  44   //
  45   // Default constructor for muon shield
  46   //
  47 }
  48
  49 //_____________________________________________________________________________
  50 AliSHILv3::AliSHILv3(const char *name, const char *title)
  51   : AliSHIL(name,title)
  52 {
  53   //
  54   // Standard constructor for muon shield
  55   //
  56 }
  57
  58 //_____________________________________________________________________________
  59 void AliSHILv3::CreateGeometry()
  60 {
  61 //
  62 // The geometry of the small angle absorber "Beam Shield"
  63 //
  64     Float_t dz, dr, z, rmax;
  65 //
  66 // The top volume
  67 //
  68     TGeoVolume* top = gGeoManager->GetVolume("ALIC");
  69 //  Rotations
  70     TGeoRotation* rot000 = new TGeoRotation("rot000",  90.,   0., 90.,  90., 0., 0.);
  71     TGeoRotation* rot090 = new TGeoRotation("rot090",  90.,  90., 90., 180., 0., 0.);
  72     TGeoRotation* rot180 = new TGeoRotation("rot180",  90., 180., 90., 270., 0., 0.);
  73     TGeoRotation* rot270 = new TGeoRotation("rot270",  90., 270., 90.,   0., 0., 0.);
  74 //
  75 // Media
  76 //
  77     TGeoMedium* kMedNiW     = gGeoManager->GetMedium("SHIL_Ni/W0");
  78     TGeoMedium* kMedNiWsh   = gGeoManager->GetMedium("SHIL_Ni/W3");
  79 //
  80     TGeoMedium* kMedSteel   = gGeoManager->GetMedium("SHIL_ST_C0");
  81     TGeoMedium* kMedSteelSh = gGeoManager->GetMedium("SHIL_ST_C3");
  82 //
  83     TGeoMedium* kMedAir     = gGeoManager->GetMedium("SHIL_AIR_C0");
  84     TGeoMedium* kMedAirMu   = gGeoManager->GetMedium("SHIL_AIR_MUON");
  85 //
  86     TGeoMedium* kMedPb      = gGeoManager->GetMedium("SHIL_PB_C0");
  87     TGeoMedium* kMedPbSh    = gGeoManager->GetMedium("SHIL_PB_C2");
  88 //
  89 //  TGeoMedium* kMedConc    = gGeoManager->GetMedium("SHIL_CC_C0");
  90     TGeoMedium* kMedConcSh  = gGeoManager->GetMedium("SHIL_CC_C2");
  91 //
  92     const Float_t kDegRad = TMath::Pi() / 180.;
  93     const Float_t kAngle02   = TMath::Tan( 2.00   * kDegRad);
  94     const Float_t kAngle0071 = TMath::Tan( 0.71   * kDegRad);
  95
  96
  97 ///////////////////////////////////
  98 //    FA Tungsten Tail           //
  99 //    Drawing ALIP2A__0049       //
 100 //    Drawing ALIP2A__0111       //
 101 ///////////////////////////////////
 102 //
 103 //    The tail as built is shorter than in drawing ALIP2A__0049.
 104 //    The CDD data base has to be updated !
 105 //
 106 //    Inner radius at the entrance of the flange
 107       Float_t rInFaWTail1  = 13.98/2.;
 108 //    Outer radius at the entrance of the flange
 109       Float_t rOuFaWTail1  = 52.00/2.;
 110 //    Outer radius at the end of the section inside the FA
 111       Float_t rOuFaWTail2  = 35.27/2.;
 112 //    Length of the Flange section inside the FA
 113       Float_t dzFaWTail1   =  6.00;
 114 //    Length of the Flange section ouside the FA
 115       Float_t dzFaWTail2   = 12.70;
 116 //    Inner radius at the end of the section inside the FA
 117       Float_t rInFaWTail2  = rInFaWTail1 +  dzFaWTail1 * kAngle0071;
 118 //    Inner radius at the end of the flange
 119       Float_t rInFaWTail3  = rInFaWTail2 +  dzFaWTail2 * kAngle0071;
 120 //    Outer radius at the end of the flange
 121       Float_t rOuFaWTail3  = rOuFaWTail2 +  dzFaWTail2 * kAngle02;
 122 //    Outer radius of the recess for station 1
 123       Float_t rOuFaWTailR  = 30.8/2.;
 124 //    Length of the recess
 125       Float_t dzFaWTailR   = 36.00;
 126 //    Inner radiues at the end of the recess
 127       Float_t rInFaWTail4  =  rInFaWTail3 +  dzFaWTailR * kAngle0071;
 128 //    Outer radius at the end of the recess
 129       Float_t rOuFaWTail4  =  rOuFaWTail3 +  dzFaWTailR * kAngle02;
 130 //    Inner radius of the straight section
 131       Float_t rInFaWTailS  = 22.30/2.;
 132 //    Length of the bulge
 133       Float_t dzFaWTailB   = 13.0;
 134 //    Outer radius at the end of the bulge
 135       Float_t rOuFaWTailB  =  rOuFaWTail4 +  dzFaWTailB * kAngle02;
 136 //    Outer radius at the end of the tail
 137       Float_t rOuFaWTailE  = 31.6/2.;
 138 //    Total length of the tail
 139       Float_t dzFaWTail    = 70.7;
 140
 141       TGeoPcon* shFaWTail = new TGeoPcon(0., 360., 10);
 142       z    = 0.;
 143 //    Flange section inside FA
 144       shFaWTail->DefineSection(0,  z, rInFaWTail1, rOuFaWTail1);
 145       z += dzFaWTail1;
 146       shFaWTail->DefineSection(1,  z, rInFaWTail2, rOuFaWTail1);
 147       shFaWTail->DefineSection(2,  z, rInFaWTail2, rOuFaWTail2);
 148 //    Flange section outside FA
 149       z +=  dzFaWTail2;
 150       shFaWTail->DefineSection(3,  z, rInFaWTail3, rOuFaWTail3);
 151       shFaWTail->DefineSection(4,  z, rInFaWTail3, rOuFaWTailR);
 152 //    Recess Station 1
 153       z +=  dzFaWTailR;
 154       shFaWTail->DefineSection(5,  z, rInFaWTail4, rOuFaWTailR);
 155       shFaWTail->DefineSection(6,  z, rInFaWTailS, rOuFaWTail4);
 156 //    Bulge
 157       z += dzFaWTailB;
 158       shFaWTail->DefineSection(7,  z, rInFaWTailS, rOuFaWTailB);
 159       shFaWTail->DefineSection(8,  z, rInFaWTailS, rOuFaWTailE);
 160 //    End
 161       z =  dzFaWTail;
 162       shFaWTail->DefineSection(9,  z, rInFaWTailS, rOuFaWTailE);
 163
 164       TGeoVolume* voFaWTail = new TGeoVolume("YFaWTail", shFaWTail, kMedNiW);
 165 //
 166 //    Define an inner region with higher transport cuts
 167       TGeoPcon* shFaWTailI = new TGeoPcon(0., 360., 4);
 168       z  = 0.;
 169       dr = 3.5;
 170       shFaWTailI->DefineSection(0, z, rInFaWTail1,  rInFaWTail1 + dr);
 171       z += (dzFaWTail1 + dzFaWTail2 +  dzFaWTailR);
 172       shFaWTailI->DefineSection(1, z, rInFaWTail4,  rInFaWTail4 + dr);
 173       shFaWTailI->DefineSection(2, z, rInFaWTailS,  rInFaWTailS + dr);
 174       z = dzFaWTail;
 175       shFaWTailI->DefineSection(3, z, rInFaWTailS,  rInFaWTailS + dr);
 176       TGeoVolume* voFaWTailI = new TGeoVolume("YFaWTailI", shFaWTailI, kMedNiWsh);
 177       voFaWTail->AddNode(voFaWTailI, 1, gGeoIdentity);
 178
 179 ///////////////////////////////////
 180 //                               //
 181 // Recess Station 1              //
 182 // Drawing ALIP2A__0260          //
 183 ///////////////////////////////////
 184
 185 ///////////////////////////////////
 186 //    FA W-Ring 2                //
 187 //    Drawing ALIP2A__0220       //
 188 ///////////////////////////////////
 189       const Float_t kFaWring2Rinner  = 15.40;
 190       const Float_t kFaWring2Router  = 18.40;
 191       const Float_t kFaWring2HWidth  =  3.75;
 192       const Float_t kFaWring2Cutoffx =  3.35;
 193       const Float_t kFaWring2Cutoffy =  3.35;
 194       TGeoTubeSeg* shFaWring2a  = new TGeoTubeSeg(kFaWring2Rinner, kFaWring2Router, kFaWring2HWidth, 0., 90.);
 195       shFaWring2a->SetName("shFaWring2a");
 196       TGeoBBox* shFaWring2b  = new TGeoBBox(kFaWring2Router / 2., kFaWring2Router / 2., kFaWring2HWidth);
 197       shFaWring2b->SetName("shFaWring2b");
 198       TGeoTranslation* trFaWring2b
 199           = new TGeoTranslation("trFaWring2b", kFaWring2Router / 2. + kFaWring2Cutoffx, kFaWring2Router / 2. + kFaWring2Cutoffy, 0.);
 200       trFaWring2b->RegisterYourself();
 201       TGeoCompositeShape*  shFaWring2 = new TGeoCompositeShape("shFaWring2", "(shFaWring2a)*(shFaWring2b:trFaWring2b)");
 202       TGeoVolume* voFaWring2    = new TGeoVolume("YFA_WRING2", shFaWring2, kMedNiW);
 203
 204 ///////////////////////////////////
 205 //    FA W-Ring 3                //
 206 //    Drawing ALIP2A__0219       //
 207 ///////////////////////////////////
 208       const Float_t kFaWring3Rinner  = 15.40;
 209       const Float_t kFaWring3Router  = 18.40;
 210       const Float_t kFaWring3HWidth  =  3.75;
 211       const Float_t kFaWring3Cutoffx =  3.35;
 212       const Float_t kFaWring3Cutoffy =  3.35;
 213       TGeoTubeSeg* shFaWring3a  = new TGeoTubeSeg(kFaWring3Rinner, kFaWring3Router, kFaWring3HWidth, 0., 90.);
 214       shFaWring3a->SetName("shFaWring3a");
 215       TGeoBBox* shFaWring3b  = new TGeoBBox(kFaWring3Router / 2., kFaWring3Router / 2., kFaWring3HWidth);
 216       shFaWring3b->SetName("shFaWring3b");
 217       TGeoTranslation* trFaWring3b
 218           = new TGeoTranslation("trFaWring3b", kFaWring3Router / 2. + kFaWring3Cutoffx, kFaWring3Router / 2. + kFaWring3Cutoffy, 0.);
 219       trFaWring3b->RegisterYourself();
 220       TGeoCompositeShape*  shFaWring3 = new TGeoCompositeShape("shFaWring3", "(shFaWring3a)*(shFaWring3b:trFaWring3b)");
 221       TGeoVolume* voFaWring3    = new TGeoVolume("YFA_WRING3", shFaWring3, kMedNiW);
 222
 223 ///////////////////////////////////
 224 //    FA W-Ring 5                //
 225 //    Drawing ALIP2A__0221       //
 226 ///////////////////////////////////
 227       const Float_t kFaWring5Rinner = 15.40;
 228       const Float_t kFaWring5Router = 18.67;
 229       const Float_t kFaWring5HWidth =  1.08;
 230       TGeoVolume* voFaWring5    = new TGeoVolume("YFA_WRING5", new TGeoTube(kFaWring5Rinner, kFaWring5Router, kFaWring5HWidth), kMedNiW);
 231
 232 //
 233 // Position the rings in the assembly
 234 //
 235       TGeoVolumeAssembly* asFaExtraShield = new TGeoVolumeAssembly("YCRE");
 236 // Distance between rings
 237       const Float_t kFaDWrings = 1.92;
 238 //
 239       dz = 0.;
 240
 241       dz +=  kFaWring2HWidth;
 242       asFaExtraShield->AddNode(voFaWring2,    1, new TGeoCombiTrans(0., 0., dz, rot090));
 243       asFaExtraShield->AddNode(voFaWring2,    2, new TGeoCombiTrans(0., 0., dz, rot270));
 244       dz +=   kFaWring2HWidth;
 245       dz +=   kFaDWrings;
 246       dz +=   kFaWring3HWidth;
 247       asFaExtraShield->AddNode(voFaWring3,    1, new TGeoCombiTrans(0., 0., dz, rot000));
 248       asFaExtraShield->AddNode(voFaWring3,    2, new TGeoCombiTrans(0., 0., dz, rot180));
 249       dz +=   kFaWring3HWidth;
 250       dz +=   kFaWring5HWidth;
 251       asFaExtraShield->AddNode(voFaWring5,    1, new TGeoTranslation(0., 0., dz));
 252       dz +=   kFaWring5HWidth;
 253       dz +=   kFaWring3HWidth;
 254       asFaExtraShield->AddNode(voFaWring3,    3, new TGeoCombiTrans(0., 0., dz, rot090));
 255       asFaExtraShield->AddNode(voFaWring3,    4, new TGeoCombiTrans(0., 0., dz, rot270));
 256       dz +=   kFaWring3HWidth;
 257       dz +=   kFaDWrings;
 258       dz +=   kFaWring2HWidth;
 259       asFaExtraShield->AddNode(voFaWring2,    3, new TGeoCombiTrans(0., 0., dz, rot000));
 260       asFaExtraShield->AddNode(voFaWring2,    4, new TGeoCombiTrans(0., 0., dz, rot180));
 261       dz +=   kFaWring2HWidth;
 262
 263
 264 ///////////////////////////////////////
 265 //                SAA1               //
 266 ///////////////////////////////////////
 267
 268
 269 ///////////////////////////////////////
 270 //          FA/SAA1  W Joint         //
 271 //          Drawing ALIP2A__0060     //
 272 ///////////////////////////////////////
 273
 274 // Length of flange FA side
 275       Float_t dzFaSaa1F1  =  2.8;
 276 // Inner radius of flange FA side
 277       Float_t rInFaSaa1F1 = 32.0/2.;
 278 // Outer radius of flange FA side
 279       Float_t rOuFaSaa1F1 = 39.5/2.;
 280 // Length of first straight section
 281       Float_t dzFaSaa1S1  = 18.5 - dzFaSaa1F1;
 282 // Inner radius of first straight section
 283       Float_t rInFaSaa1S1 = 22.3/2.;
 284 // Length of 45 deg transition region
 285       Float_t  dzFaSaa1T1 =  2.2;
 286 // Inner radius of second straight section
 287       Float_t rInFaSaa1S2 = 17.9/2.;
 288 // Length of second straight section
 289       Float_t dzFaSaa1S2  = 10.1;
 290 // Length of flange SAA1 side
 291 //    Float_t dzFaSaa1F2  =  4.0;
 292 // Inner radius of flange FA side
 293       Float_t rInFaSaa1F2 = 25.2/2.;
 294 // Length of joint
 295       Float_t dzFaSaa1    = 34.8;
 296 // Outer Radius at the end of the joint
 297       Float_t rOuFaSaa1E  = 41.93/2.;
 298
 299
 300       TGeoPcon* shFaSaa1 = new TGeoPcon(0., 360., 8);
 301       z = 0;
 302 // Flange FA side
 303       shFaSaa1->DefineSection( 0, z, rInFaSaa1F1, rOuFaSaa1F1);
 304       z += dzFaSaa1F1;
 305       shFaSaa1->DefineSection( 1, z, rInFaSaa1F1, 40.0);
 306       shFaSaa1->DefineSection( 2, z, rInFaSaa1S1, 40.0);
 307 // First straight section
 308       z += dzFaSaa1S1;
 309       shFaSaa1->DefineSection( 3, z, rInFaSaa1S1, 40.0);
 310 // 45 deg transition region
 311       z += dzFaSaa1T1;
 312       shFaSaa1->DefineSection( 4, z, rInFaSaa1S2, 40.0);
 313 // Second straight section
 314       z += dzFaSaa1S2;
 315       shFaSaa1->DefineSection( 5, z, rInFaSaa1S2, 40.0);
 316       shFaSaa1->DefineSection( 6, z, rInFaSaa1F2, 40.0);
 317 // Flange SAA1 side
 318       z = dzFaSaa1;
 319       shFaSaa1->DefineSection( 7, z, rInFaSaa1F2, rOuFaSaa1E);
 320
 321 // Outer 2 deg line
 322       for (Int_t i  = 1; i < 7; i++) {
 323           Double_t z    = shFaSaa1->GetZ(i);
 324           Double_t r1   = shFaSaa1->GetRmin(i);
 325           Double_t r2 = 39.5/2. + z * TMath::Tan(2. * kDegRad) - 0.01;
 326           shFaSaa1->DefineSection(i, z, r1, r2);
 327       }
 328       TGeoVolume* voFaSaa1 = new TGeoVolume("YFASAA1", shFaSaa1, kMedNiWsh);
 329 //
 330 // Outer region with lower transport cuts
 331       TGeoCone* shFaSaa1O   = new TGeoCone(dzFaSaa1/2., rOuFaSaa1F1 - 3.5, rOuFaSaa1F1, rOuFaSaa1E - 3.5, rOuFaSaa1E);
 332       TGeoVolume* voFaSaa1O = new TGeoVolume("YFASAA1O", shFaSaa1O, kMedNiW);
 333       voFaSaa1->AddNode(voFaSaa1O, 1, new TGeoTranslation(0., 0., dzFaSaa1/2.));
 334
 335
 336 ///////////////////////////////////
 337 //    SAA1 Steel Envelope        //
 338 //    Drawing ALIP2A__0039       //
 339 ///////////////////////////////////
 340
 341       Float_t rOut;      // Outer radius
 342 // Thickness of the steel envelope
 343       Float_t dSt = 4.;
 344 // 4 Section
 345 // z-positions
 346       Float_t zSaa1StEnv[5] = {111.2, 113.7, 229.3, 195.0};
 347 // Radii
 348 // 1
 349       Float_t rOuSaa1StEnv1 = 40.4/2.;
 350       Float_t rInSaa1StEnv1 = rOuSaa1StEnv1 - dSt;
 351 // 2
 352       Float_t rInSaa1StEnv2 = 41.7/2.;
 353       Float_t rOuSaa1StEnv2 = rInSaa1StEnv2 + dSt / TMath::Cos(2.0 * kDegRad);
 354 // 3
 355       Float_t rOuSaa1StEnv3 = 57.6/2.;
 356       Float_t rInSaa1StEnv3 = rOuSaa1StEnv3 - dSt;
 357 // 4
 358       Float_t rInSaa1StEnv4 = 63.4/2.;
 359       Float_t rOuSaa1StEnv4 = rInSaa1StEnv4 + dSt / TMath::Cos(1.6 * kDegRad);
 360 // end
 361       Float_t rInSaa1StEnv5 = 74.28/2.;
 362       Float_t rOuSaa1StEnv5 = rInSaa1StEnv5 + dSt / TMath::Cos(1.6 * kDegRad);
 363 // Relative starting position
 364       Float_t zSaa1StEnvS = 3.;
 365
 366       TGeoPcon* shSaa1StEnv  = new TGeoPcon(0., 360., 11);
 367 // 1st Section
 368       z = zSaa1StEnvS;
 369       shSaa1StEnv->DefineSection( 0, z, rInSaa1StEnv1, rOuSaa1StEnv1);
 370       z += (zSaa1StEnv[0] - dSt);
 371       shSaa1StEnv->DefineSection( 1, z, rInSaa1StEnv1, rOuSaa1StEnv1);
 372 // 1 - 2
 373       shSaa1StEnv->DefineSection( 2, z, rInSaa1StEnv1, rOuSaa1StEnv2);
 374       z +=  dSt;
 375       shSaa1StEnv->DefineSection( 3, z, rInSaa1StEnv1, rOuSaa1StEnv2);
 376 // 2nd Section
 377       shSaa1StEnv->DefineSection( 4, z, rInSaa1StEnv2, rOuSaa1StEnv2);
 378       z += zSaa1StEnv[1];
 379       shSaa1StEnv->DefineSection( 5, z, rInSaa1StEnv3, rOuSaa1StEnv3);
 380 // 3rd Section
 381       z += (zSaa1StEnv[2] - dSt);
 382       shSaa1StEnv->DefineSection( 6, z, rInSaa1StEnv3, rOuSaa1StEnv3);
 383 // 3 - 4
 384       shSaa1StEnv->DefineSection( 7, z, rInSaa1StEnv3, rOuSaa1StEnv4);
 385       z += dSt;
 386       shSaa1StEnv->DefineSection( 8, z, rInSaa1StEnv3, rOuSaa1StEnv4);
 387 // 4th Section
 388       shSaa1StEnv->DefineSection( 9, z, rInSaa1StEnv4, rOuSaa1StEnv4);
 389       z += zSaa1StEnv[3];
 390       shSaa1StEnv->DefineSection(10, z, rInSaa1StEnv5, rOuSaa1StEnv5);
 391       TGeoVolume* voSaa1StEnv  =  new TGeoVolume("YSAA1_SteelEnvelope", shSaa1StEnv, kMedSteel);
 392
 393
 394
 395
 396
 397 ///////////////////////////////////
 398 //    SAA1 W-Pipe                //
 399 //    Drawing ALIP2A__0059       //
 400 ///////////////////////////////////
 401 //
 402 //    Flange FA side
 403 //    Length of first section
 404       Float_t dzSaa1WPipeF1  = 0.9;
 405 //    Outer radius
 406       Float_t rOuSaa1WPipeF1 = 24.5/2.;
 407 //    Inner Radius
 408       Float_t rInSaa1WPipeF1 = 22.0/2.;
 409 //    Length of second section
 410       Float_t dzSaa1WPipeF11 =  2.1;
 411 //    Inner Radius
 412       Float_t rInSaa1WPipeF11 = 18.5/2.;
 413 //
 414 //    Central tube
 415 //    Length
 416       Float_t dzSaa1WPipeC = 111.2;
 417 //    Inner Radius at the end
 418       Float_t rInSaa1WPipeC = 22.0/2.;
 419 //    Outer Radius
 420       Float_t rOuSaa1WPipeC = 31.9/2.;
 421 //
 422 //    Flange SAA2 Side
 423 //    Length
 424       Float_t dzSaa1WPipeF2  = 6.0;
 425 //    Outer radius
 426       Float_t rOuSaa1WPipeF2 = 41.56/2.;
 427
 428 //
 429       TGeoPcon* shSaa1WPipe  = new TGeoPcon(0., 360., 8);
 430       z = 0.;
 431 // Flange FA side first section
 432       shSaa1WPipe->DefineSection( 0, z, rInSaa1WPipeF1 , rOuSaa1WPipeF1);
 433       z += dzSaa1WPipeF1;
 434       shSaa1WPipe->DefineSection( 1, z, rInSaa1WPipeF1 , rOuSaa1WPipeF1);
 435 // Flange FA side second section
 436       shSaa1WPipe->DefineSection( 2, z, rInSaa1WPipeF11, rOuSaa1WPipeF1);
 437       z += dzSaa1WPipeF11;
 438       shSaa1WPipe->DefineSection( 3, z, rInSaa1WPipeF11, rOuSaa1WPipeF1);
 439 // Central Section
 440       shSaa1WPipe->DefineSection( 4, z, rInSaa1WPipeF11, rOuSaa1WPipeC);
 441       z += dzSaa1WPipeC;
 442       shSaa1WPipe->DefineSection( 5, z, rInSaa1WPipeC,   rOuSaa1WPipeC);
 443 // Flange SAA2 side
 444       shSaa1WPipe->DefineSection( 6, z, rInSaa1WPipeC,   rOuSaa1WPipeF2);
 445       z +=  dzSaa1WPipeF2;
 446       shSaa1WPipe->DefineSection( 7, z, rInSaa1WPipeC,   rOuSaa1WPipeF2);
 447
 448       TGeoVolume* voSaa1WPipe  =  new TGeoVolume("YSAA1_WPipe", shSaa1WPipe, kMedNiW);
 449 //
 450 // Inner region with higher transport cuts
 451       TGeoTube*   shSaa1WPipeI = new TGeoTube(rInSaa1WPipeC, rOuSaa1WPipeC, dzSaa1WPipeC/2.);
 452       TGeoVolume* voSaa1WPipeI =  new TGeoVolume("YSAA1_WPipeI", shSaa1WPipeI, kMedNiWsh);
 453       voSaa1WPipe->AddNode(voSaa1WPipeI, 1, new TGeoTranslation(0., 0., dzSaa1WPipeF1 + dzSaa1WPipeF11 + dzSaa1WPipeC/2));
 454
 455
 456 ///////////////////////////////////
 457 //    SAA1 Pb Components         //
 458 //    Drawing ALIP2A__0078       //
 459 ///////////////////////////////////
 460 //
 461 //    Inner angle
 462       Float_t tanAlpha = TMath::Tan(1.69    / 2. * kDegRad);
 463       Float_t tanBeta  = TMath::Tan(3.20    / 2. * kDegRad);
 464 //
 465 //    1st Section 2deg opening cone
 466 //    Length
 467       Float_t dzSaa1PbComp1 = 100.23;
 468 //    Inner radius at entrance
 469       Float_t rInSaa1PbComp1 = 22.0/2.; // It's 21 cm diameter in the drawing. Is this a typo ??!!
 470 //    Outer radius at entrance
 471       Float_t rOuSaa1PbComp1 = 42.0/2.;
 472 //
 473 //    2nd Section: Straight Section
 474 //    Length
 475       Float_t dzSaa1PbComp2  = 236.77;
 476 //    Inner radius
 477       Float_t rInSaa1PbComp2 = rInSaa1PbComp1 + dzSaa1PbComp1 * tanAlpha;
 478 //    Outer radius
 479       Float_t rOuSaa1PbComp2 = 49.0/2.;
 480 //
 481 //    3rd Section: 1.6deg opening cone until bellow
 482 //    Length
 483       Float_t dzSaa1PbComp3 = 175.6;
 484 //    Inner radius
 485       Float_t  rInSaa1PbComp3 = rInSaa1PbComp2 + dzSaa1PbComp2 * tanAlpha;
 486 //    Outer radius
 487       Float_t rOuSaa1PbComp3 = 62.8/2.;
 488 //
 489 //   4th Section: Bellow region
 490       Float_t dzSaa1PbComp4  = 26.4;
 491 //    Inner radius
 492       Float_t  rInSaa1PbComp4 = 37.1/2.;
 493       Float_t  rInSaa1PbCompB = 43.0/2.;
 494 //    Outer radius
 495       Float_t rOuSaa1PbComp4  = rOuSaa1PbComp3 +  dzSaa1PbComp3 * tanBeta;
 496 //
 497 //   5th Section: Flange SAA2 side
 498 //   1st detail
 499       Float_t dzSaa1PbCompF1  = 4.;
 500       Float_t rOuSaa1PbCompF1 = 74.1/2.;
 501 //   2nd detail
 502       Float_t dzSaa1PbCompF2  = 3.;
 503       Float_t rOuSaa1PbCompF2 = 66.0/2.;
 504       Float_t rOuSaa1PbCompF3 = 58.0/2.;
 505
 506
 507       TGeoPcon* shSaa1PbComp  = new TGeoPcon(0., 360., 11);
 508       z = 120.2;
 509 // 2 deg opening cone
 510       shSaa1PbComp->DefineSection( 0, z, rInSaa1PbComp1, rOuSaa1PbComp1);
 511       z += dzSaa1PbComp1;
 512       shSaa1PbComp->DefineSection( 1, z, rInSaa1PbComp2, rOuSaa1PbComp2);
 513 // Straight section
 514       z += dzSaa1PbComp2;
 515       shSaa1PbComp->DefineSection( 2, z, rInSaa1PbComp3, rOuSaa1PbComp2);
 516 // 1.6 deg opening cone
 517       shSaa1PbComp->DefineSection( 3, z, rInSaa1PbComp3, rOuSaa1PbComp3);
 518       z += dzSaa1PbComp3;
 519       shSaa1PbComp->DefineSection( 4, z, rInSaa1PbComp4, rOuSaa1PbComp4);
 520 // Bellow region until outer flange
 521       shSaa1PbComp->DefineSection( 5, z, rInSaa1PbCompB, rOuSaa1PbComp4);
 522       z += (dzSaa1PbComp4 - dzSaa1PbCompF1 -  dzSaa1PbCompF2);
 523       shSaa1PbComp->DefineSection( 6, z, rInSaa1PbCompB, rOuSaa1PbCompF1);
 524       shSaa1PbComp->DefineSection( 7, z, rInSaa1PbCompB, rOuSaa1PbCompF2);
 525 // Flange first step
 526       z +=  dzSaa1PbCompF1;
 527       shSaa1PbComp->DefineSection( 8, z, rInSaa1PbCompB, rOuSaa1PbCompF2);
 528       shSaa1PbComp->DefineSection( 9, z, rInSaa1PbCompB, rOuSaa1PbCompF3);
 529 // Flange second step
 530       z +=  dzSaa1PbCompF2;
 531       shSaa1PbComp->DefineSection( 10, z, rInSaa1PbCompB, rOuSaa1PbCompF3);
 532
 533       TGeoVolume* voSaa1PbComp  =  new TGeoVolume("YSAA1_PbComp", shSaa1PbComp, kMedPb);
 534 //
 535 // Inner region with higher transport cuts
 536       TGeoPcon*   shSaa1PbCompI = MakeShapeFromTemplate(shSaa1PbComp, 0., -3.);
 537       TGeoVolume* voSaa1PbCompI =  new TGeoVolume("YSAA1_PbCompI", shSaa1PbCompI, kMedPbSh);
 538       voSaa1PbComp->AddNode(voSaa1PbCompI, 1, gGeoIdentity);
 539
 540 ///////////////////////////////////
 541 //    SAA1 W-Cone                //
 542 //    Drawing ALIP2A__0058       //
 543 ///////////////////////////////////
 544       // Length of the Cone
 545       Float_t dzSaa1WCone = 52.9;
 546       // Inner and outer radii
 547       Float_t rInSaa1WCone1 = 20.4;
 548       Float_t rOuSaa1WCone1 = rInSaa1WCone1 + 0.97;
 549       Float_t rOuSaa1WCone2 = rInSaa1WCone1 + 2.80;
 550       // relative z-position
 551       Float_t zSaa1WCone    = 9.3;
 552
 553
 554       TGeoPcon* shSaa1WCone  = new TGeoPcon(0., 360., 2);
 555       z = zSaa1WCone;
 556       shSaa1WCone->DefineSection( 0, z, rInSaa1WCone1, rOuSaa1WCone1);
 557       z += dzSaa1WCone;
 558       shSaa1WCone->DefineSection( 1, z, rInSaa1WCone1, rOuSaa1WCone2);
 559       TGeoVolume* voSaa1WCone  =  new TGeoVolume("YSAA1_WCone", shSaa1WCone, kMedNiW);
 560
 561 ///////////////////////////////////
 562 //    SAA1 Steel-Ring            //
 563 //    Drawing ALIP2A__0040       //
 564 ///////////////////////////////////
 565 //
 566 //    Length of the ring
 567       Float_t dzSaa1StRing = 4.;
 568 //    Inner and outer radius
 569       Float_t rInSaa1String = 33.0;
 570       Float_t rOuSaa1String = 41.1;
 571 //    Relative z-position
 572       Float_t zSaa1StRing   = 652.2;
 573       TGeoPcon* shSaa1StRing  = new TGeoPcon(0., 360., 2);
 574       z = zSaa1StRing;
 575       shSaa1StRing->DefineSection( 0, z, rInSaa1String, rOuSaa1String);
 576       z += dzSaa1StRing;
 577       shSaa1StRing->DefineSection( 1, z, rInSaa1String, rOuSaa1String);
 578       TGeoVolume* voSaa1StRing  =  new TGeoVolume("YSAA1_StRing", shSaa1StRing, kMedSteel);
 579
 580 ///////////////////////////////////
 581 //    SAA1 Inner Tube            //
 582 //    Drawing ALIP2A__0082       //
 583 ///////////////////////////////////
 584 //
 585 // Length of saa2:               659.2 cm
 586 // Length of inner tube:         631.9 cm
 587 // Lenth of bellow cavern:        27.3 cm
 588 // Radius at entrance 18.5/2,  d = 0.3
 589 // Radius at exit     37.1/2,  d = 0.3
 590 //
 591       Float_t dzSaa1InnerTube     = 631.9/2.;  // Half length of the tube
 592       Float_t rInSaa1InnerTube    =  18.2/2.;  // Radius at entrance
 593       Float_t rOuSaa1InnerTube    =  36.8/2.;  // Radius at exit
 594       Float_t dSaa1InnerTube      =   0.2   ;  // Thickness
 595       TGeoVolume* voSaa1InnerTube = new TGeoVolume("YSAA1_InnerTube",
 596                                                    new TGeoCone(dzSaa1InnerTube,
 597                                                                 rInSaa1InnerTube - dSaa1InnerTube, rInSaa1InnerTube,
 598                                                                 rOuSaa1InnerTube - dSaa1InnerTube, rOuSaa1InnerTube),
 599                                                    kMedSteelSh);
 600
 601 ///////////////////////////////////
 602 //    SAA1 Outer Shape           //
 603 //    Drawing ALIP2A__0107       //
 604 ///////////////////////////////////
 605       // Total length
 606       Float_t dzSaa1 = 659.2;
 607       //
 608       TGeoPcon* shSaa1M  = new TGeoPcon(0., 360., 20);
 609       Float_t kSec = 0.01; // security distance to avoid trivial extrusions
 610       Float_t rmin = rInSaa1InnerTube - dSaa1InnerTube - kSec;
 611       rmax = rOuSaa1InnerTube - dSaa1InnerTube - kSec;
 612       z = 0.;
 613       shSaa1M->DefineSection( 0, z, rmin, rOuSaa1WPipeF1);
 614       z += dzSaa1WPipeF1;
 615       shSaa1M->DefineSection( 1, z, rmin, rOuSaa1WPipeF1);
 616       shSaa1M->DefineSection( 2, z, 0.,   rOuSaa1WPipeF1);
 617       z += dzSaa1WPipeF11;
 618       shSaa1M->DefineSection( 3, z, 0.,   rOuSaa1WPipeF1);
 619       shSaa1M->DefineSection( 4, z, 0.,   rOuSaa1StEnv1);
 620       z = zSaa1WCone;
 621       shSaa1M->DefineSection( 5, z, 0.,   rOuSaa1StEnv1);
 622       shSaa1M->DefineSection( 6, z, 0.,   rOuSaa1WCone1);
 623       z += dzSaa1WCone;
 624       shSaa1M->DefineSection( 7, z, 0.,   rOuSaa1WCone2);
 625       shSaa1M->DefineSection( 8, z, 0.,   rOuSaa1StEnv1);
 626       z =  zSaa1StEnv[0] - dSt + zSaa1StEnvS;
 627       shSaa1M->DefineSection( 9, z, 0.,   rOuSaa1StEnv1);
 628       shSaa1M->DefineSection(10, z, 0.,   rOuSaa1StEnv2);
 629       z +=  (zSaa1StEnv[1] + dSt);
 630       shSaa1M->DefineSection(11, z, 0.,   rOuSaa1StEnv3);
 631       z +=  (zSaa1StEnv[2] - dSt);
 632       shSaa1M->DefineSection(12, z, 0.,   rOuSaa1StEnv3);
 633       shSaa1M->DefineSection(13, z, 0.,   rOuSaa1StEnv4);
 634
 635       z += (zSaa1StEnv[3] - dSt +  dzSaa1PbCompF1 + dzSaa1PbCompF2 - dzSaa1PbComp4);
 636       Float_t rmaxSaa1 = shSaa1M->GetRmax(13) + (z - shSaa1M->GetZ(13)) * TMath::Tan(1.6 * kDegRad);
 637
 638       shSaa1M->DefineSection(14, z, 0.,    rmaxSaa1);
 639       shSaa1M->DefineSection(15, z, rmax,  rmaxSaa1);
 640       z = zSaa1StRing;
 641       shSaa1M->DefineSection(16, z, rmax, rOuSaa1String);
 642       z += dzSaa1PbCompF1;
 643       shSaa1M->DefineSection(17, z, rmax, rOuSaa1String);
 644       shSaa1M->DefineSection(18, z, rmax, rOuSaa1PbCompF3);
 645       z += dzSaa1PbCompF2;
 646       shSaa1M->DefineSection(19, z, rmax, rOuSaa1PbCompF3);
 647
 648 //
 649 //    Inner 1.69deg line
 650       for (Int_t i  = 2; i < 15; i++) {
 651           Double_t z    = shSaa1M->GetZ(i);
 652           Double_t r2 = shSaa1M->GetRmax(i);
 653           Double_t r1 = rmin + (z - 0.9) * TMath::Tan(1.69 / 2. * kDegRad) - kSec;
 654           shSaa1M->DefineSection(i, z, r1, r2);
 655       }
 656
 657       TGeoVolume* voSaa1M  =  new TGeoVolume("YSAA1M", shSaa1M, kMedAir);
 658       voSaa1M->SetVisibility(0);
 659
 660
 661 ///////////////////////////////////
 662 //                               //
 663 // Recess Station 2              //
 664 // Drawing ALIP2A__0260          //
 665 ///////////////////////////////////
 666 ///////////////////////////////////
 667 //    SAA1 W-Ring 1              //
 668 //    Drawing ALIP2A__0217       //
 669 ///////////////////////////////////
 670       Float_t saa1Wring1Width  =  5.85;
 671       TGeoPcon* shSaa1Wring1    = new TGeoPcon(0., 360., 2);
 672       shSaa1Wring1->DefineSection(0, 0.00           , 20.30, 23.175);
 673       shSaa1Wring1->DefineSection(1, saa1Wring1Width, 20.30, 23.400);
 674       TGeoVolume* voSaa1Wring1  =  new TGeoVolume("YSAA1_WRING1", shSaa1Wring1, kMedNiW);
 675
 676 ///////////////////////////////////
 677 //    SAA1 W-Ring 2              //
 678 //    Drawing ALIP2A__0055       //
 679 ///////////////////////////////////
 680       Float_t saa1Wring2Rinner  = 20.30;
 681       Float_t saa1Wring2Router  = 23.40;
 682       Float_t saa1Wring2HWidth  =  3.75;
 683       Float_t saa1Wring2Cutoffx =  4.45;
 684       Float_t saa1Wring2Cutoffy =  4.45;
 685       TGeoTubeSeg* shSaa1Wring2a  = new TGeoTubeSeg(saa1Wring2Rinner, saa1Wring2Router, saa1Wring2HWidth, 0., 90.);
 686       shSaa1Wring2a->SetName("shSaa1Wring2a");
 687       TGeoBBox* shSaa1Wring2b  = new TGeoBBox(saa1Wring2Router / 2., saa1Wring2Router / 2., saa1Wring2HWidth);
 688       shSaa1Wring2b->SetName("shSaa1Wring2b");
 689       TGeoTranslation* trSaa1Wring2b
 690           = new TGeoTranslation("trSaa1Wring2b", saa1Wring2Router / 2. + saa1Wring2Cutoffx, saa1Wring2Router / 2. + saa1Wring2Cutoffy, 0.);
 691       trSaa1Wring2b->RegisterYourself();
 692       TGeoCompositeShape*  shSaa1Wring2 = new TGeoCompositeShape("shSaa1Wring2", "(shSaa1Wring2a)*(shSaa1Wring2b:trSaa1Wring2b)");
 693       TGeoVolume* voSaa1Wring2 = new TGeoVolume("YSAA1_WRING2", shSaa1Wring2, kMedNiW);
 694
 695 ///////////////////////////////////
 696 //    SAA1 W-Ring 3              //
 697 //    Drawing ALIP2A__0216       //
 698 ///////////////////////////////////
 699
 700       Float_t saa1Wring3Rinner  = 20.30;
 701       Float_t saa1Wring3Router  = 23.40;
 702       Float_t saa1Wring3HWidth  =  3.75;
 703       Float_t saa1Wring3Cutoffx =  4.50;
 704       Float_t saa1Wring3Cutoffy =  4.40;
 705       TGeoTubeSeg* shSaa1Wring3a  = new TGeoTubeSeg(saa1Wring3Rinner, saa1Wring3Router, saa1Wring3HWidth, 0., 90.);
 706       shSaa1Wring3a->SetName("shSaa1Wring3a");
 707       TGeoBBox* shSaa1Wring3b  = new TGeoBBox(saa1Wring3Router / 2., saa1Wring3Router / 2., saa1Wring3HWidth);
 708       shSaa1Wring3b->SetName("shSaa1Wring3b");
 709       TGeoTranslation* trSaa1Wring3b
 710           = new TGeoTranslation("trSaa1Wring3b", saa1Wring3Router / 2. + saa1Wring3Cutoffx, saa1Wring3Router / 2. + saa1Wring3Cutoffy, 0.);
 711       trSaa1Wring3b->RegisterYourself();
 712       TGeoCompositeShape*  shSaa1Wring3 = new TGeoCompositeShape("shSaa1Wring3", "(shSaa1Wring3a)*(shSaa1Wring3b:trSaa1Wring3b)");
 713       TGeoVolume* voSaa1Wring3 = new TGeoVolume("YSAA1_WRING3", shSaa1Wring3, kMedNiW);
 714
 715 ///////////////////////////////////
 716 //    SAA1 W-Ring 4              //
 717 //    Drawing ALIP2A__0215       //
 718 ///////////////////////////////////
 719       Float_t saa1Wring4Width  =  5.85;
 720       TGeoPcon* shSaa1Wring4  = new TGeoPcon(0., 360., 5);
 721       shSaa1Wring4->DefineSection(0, 0.00, 20.30, 23.40);
 722       shSaa1Wring4->DefineSection(1, 1.00, 20.30, 23.40);
 723       shSaa1Wring4->DefineSection(2, 1.00, 20.30, 24.50);
 724       shSaa1Wring4->DefineSection(3, 4.85, 20.30, 24.80);
 725       shSaa1Wring4->DefineSection(4, 5.85, 24.10, 24.80);
 726       TGeoVolume* voSaa1Wring4  =  new TGeoVolume("YSAA1_WRING4", shSaa1Wring4, kMedNiW);
 727
 728 ///////////////////////////////////
 729 //    SAA1 W-Ring 5              //
 730 //    Drawing ALIP2A__0218       //
 731 ///////////////////////////////////
 732       Float_t saa1Wring5Rinner = 20.30;
 733       Float_t saa1Wring5Router = 23.40;
 734       Float_t saa1Wring5HWidth =  0.85;
 735       TGeoVolume* voSaa1Wring5    = new TGeoVolume("YSAA1_WRING5",
 736                                                    new TGeoTube(saa1Wring5Rinner, saa1Wring5Router, saa1Wring5HWidth), kMedNiW);
 737 //
 738 // Position the rings in the assembly
 739 //
 740       TGeoVolumeAssembly* asSaa1ExtraShield = new TGeoVolumeAssembly("YSAA1ExtraShield");
 741 // Distance between rings
 742       Float_t saa1DWrings = 2.3;
 743 //
 744       dz = - (saa1Wring1Width + 6. * saa1Wring2HWidth + 2. * saa1Wring3HWidth + saa1Wring4Width + 2. * saa1Wring5HWidth + 2. * saa1DWrings) / 2.;
 745       asSaa1ExtraShield->AddNode(voSaa1Wring1,    1, new TGeoTranslation(0., 0., dz));
 746       dz +=   saa1Wring1Width;
 747       dz +=   saa1Wring2HWidth;
 748       asSaa1ExtraShield->AddNode(voSaa1Wring2,    1, new TGeoCombiTrans(0., 0., dz, rot000));
 749       asSaa1ExtraShield->AddNode(voSaa1Wring2,    2, new TGeoCombiTrans(0., 0., dz, rot180));
 750       dz +=   saa1Wring2HWidth;
 751       dz +=   saa1DWrings;
 752       dz +=   saa1Wring2HWidth;
 753       asSaa1ExtraShield->AddNode(voSaa1Wring2,    3, new TGeoCombiTrans(0., 0., dz, rot090));
 754       asSaa1ExtraShield->AddNode(voSaa1Wring2,    4, new TGeoCombiTrans(0., 0., dz, rot270));
 755       dz +=   saa1Wring2HWidth;
 756       dz +=   saa1Wring5HWidth;
 757       asSaa1ExtraShield->AddNode(voSaa1Wring5,    1, new TGeoTranslation(0., 0., dz));
 758       dz +=   saa1Wring5HWidth;
 759       dz +=   saa1Wring2HWidth;
 760       asSaa1ExtraShield->AddNode(voSaa1Wring2,    5, new TGeoCombiTrans(0., 0., dz, rot000));
 761       asSaa1ExtraShield->AddNode(voSaa1Wring2,    6, new TGeoCombiTrans(0., 0., dz, rot180));
 762       dz +=   saa1Wring2HWidth;
 763       dz +=   saa1DWrings;
 764       dz +=   saa1Wring3HWidth;
 765       asSaa1ExtraShield->AddNode(voSaa1Wring3,    1, new TGeoCombiTrans(0., 0., dz, rot090));
 766       asSaa1ExtraShield->AddNode(voSaa1Wring3,    2, new TGeoCombiTrans(0., 0., dz, rot270));
 767       dz +=   saa1Wring3HWidth;
 768       asSaa1ExtraShield->AddNode(voSaa1Wring4,    1, new TGeoTranslation(0., 0., dz));
 769       dz +=   saa1Wring4Width;
 770       const Float_t saa1ExtraShieldL = 48;
 771 //
 772 // Assemble SAA1
 773       voSaa1M->AddNode(voSaa1StEnv,     1, gGeoIdentity);
 774       voSaa1M->AddNode(voSaa1WPipe,     1, gGeoIdentity);
 775       voSaa1M->AddNode(voSaa1PbComp,    1, gGeoIdentity);
 776       voSaa1M->AddNode(voSaa1WCone,     1, gGeoIdentity);
 777       voSaa1M->AddNode(voSaa1StRing,    1, gGeoIdentity);
 778       voSaa1M->AddNode(voSaa1InnerTube, 1, new TGeoTranslation(0., 0., dzSaa1InnerTube + 0.9));
 779       TGeoVolumeAssembly* voSaa1 = new TGeoVolumeAssembly("YSAA1");
 780       voSaa1->AddNode(voSaa1M, 1, gGeoIdentity);
 781
 782 ///////////////////////////////////////
 783 //          SAA1/SAA2  Pb Joint      //
 784 //          Drawing ALIP2A__0081     //
 785 ///////////////////////////////////////
 786 //
 787 // Outer radius
 788       Float_t rOuSaa1Saa2      = 70.0/2.;
 789 // Flange SAA1 side
 790       Float_t dzSaa1Saa2F1     =  3.;
 791       Float_t rInSaa1Saa2F1    = 58.5/2.;
 792 // 1st Central Section
 793       Float_t dzSaa1Saa2C1     = 19.3;
 794       Float_t rInSaa1Saa2C1    = 42.8/2.;
 795 // Transition Region
 796       Float_t dzSaa1Saa2T      =  3.3;
 797 // 1st Central Section
 798       Float_t dzSaa1Saa2C2     =  6.2;
 799       Float_t rInSaa1Saa2C2    = 36.2/2.;
 800 // Flange SAA2 side
 801       Float_t dzSaa1Saa2F2     =  3.1;
 802       Float_t rInSaa1Saa2F2    = 54.1/2.;
 803 // Total length
 804       Float_t dzSaa1Saa2       = 34.9;
 805
 806
 807       TGeoPcon* shSaa1Saa2Pb = new TGeoPcon(0., 360., 8);
 808       z = 0.;
 809 // Flange SAA1 side
 810       shSaa1Saa2Pb->DefineSection( 0,  z, rInSaa1Saa2F1, rOuSaa1Saa2);
 811       z += dzSaa1Saa2F1;
 812       shSaa1Saa2Pb->DefineSection( 1,  z, rInSaa1Saa2F1, rOuSaa1Saa2);
 813       shSaa1Saa2Pb->DefineSection( 2,  z, rInSaa1Saa2C1, rOuSaa1Saa2);
 814 // Central region 1
 815       z +=  dzSaa1Saa2C1;
 816       shSaa1Saa2Pb->DefineSection( 3,  z, rInSaa1Saa2C1, rOuSaa1Saa2);
 817 // 45 deg transition
 818       z += dzSaa1Saa2T;
 819       shSaa1Saa2Pb->DefineSection( 4, z, rInSaa1Saa2C2, rOuSaa1Saa2);
 820       z += dzSaa1Saa2C2;
 821       shSaa1Saa2Pb->DefineSection( 5, z, rInSaa1Saa2C2, rOuSaa1Saa2);
 822       shSaa1Saa2Pb->DefineSection( 6, z, rInSaa1Saa2F2, rOuSaa1Saa2);
 823       z += dzSaa1Saa2F2;
 824       shSaa1Saa2Pb->DefineSection( 7, z, rInSaa1Saa2F2, rOuSaa1Saa2);
 825       TGeoVolume* voSaa1Saa2Pb = new TGeoVolume("YSAA1SAA2Pb", shSaa1Saa2Pb, kMedPb);
 826 //
 827 //    Mother volume and outer steel envelope
 828       Float_t rOuSaa1Saa2Steel = 36.9;
 829
 830       TGeoPcon* shSaa1Saa2 = MakeShapeFromTemplate(shSaa1Saa2Pb, 0., rOuSaa1Saa2Steel-rOuSaa1Saa2);
 831       TGeoVolume* voSaa1Saa2 = new TGeoVolume("YSAA1SAA2", shSaa1Saa2, kMedSteel);
 832       voSaa1Saa2->AddNode(voSaa1Saa2Pb, 1, gGeoIdentity);
 833 //
 834 //    Inner region with higher transport cuts
 835 //
 836       TGeoPcon*   shSaa1Saa2I = MakeShapeFromTemplate(shSaa1Saa2Pb, 0., -3.);
 837       TGeoVolume* voSaa1Saa2I = new TGeoVolume("YSAA1_SAA2I", shSaa1Saa2I, kMedPbSh);
 838       voSaa1Saa2Pb->AddNode(voSaa1Saa2I, 1, gGeoIdentity);
 839
 840
 841
 842 ///////////////////////////////////////
 843 //                SAA2               //
 844 ///////////////////////////////////////
 845
 846
 847 ///////////////////////////////////
 848 //    SAA2 Steel Envelope        //
 849 //    Drawing ALIP2A__0041       //
 850 ///////////////////////////////////
 851       dSt = 4.;  // Thickness of steel envelope
 852       // Length of the first section
 853       Float_t dzSaa2StEnv1  = 163.15;
 854       Float_t rInSaa2StEnv1 = 65.8/2.;
 855       // Length of the second section
 856       Float_t dzSaa2StEnv2  = 340.35 - 4.;
 857       Float_t rInSaa2StEnv2 = 87.2/2.;
 858       // Rel. starting position
 859       Float_t zSaa2StEnv = 3.;
 860
 861       TGeoPcon* shSaa2StEnv  = new TGeoPcon(0., 360., 6);
 862       // First Section
 863       z = zSaa2StEnv;
 864       shSaa2StEnv->DefineSection( 0, z, rInSaa2StEnv1, rInSaa2StEnv1 + dSt);
 865       z += dzSaa2StEnv1;
 866       shSaa2StEnv->DefineSection( 1, z, rInSaa2StEnv1, rInSaa2StEnv1 + dSt);
 867       // Transition region
 868       shSaa2StEnv->DefineSection( 2, z, rInSaa2StEnv1, rInSaa2StEnv2 + dSt);
 869       z += dSt;
 870       shSaa2StEnv->DefineSection( 3, z, rInSaa2StEnv1, rInSaa2StEnv2 + dSt);
 871       // Second section
 872       shSaa2StEnv->DefineSection( 4, z, rInSaa2StEnv2, rInSaa2StEnv2 + dSt);
 873       z += dzSaa2StEnv2;
 874       shSaa2StEnv->DefineSection( 5, z, rInSaa2StEnv2, rInSaa2StEnv2 + dSt);
 875
 876       TGeoVolume* voSaa2StEnv  =  new TGeoVolume("YSAA2_SteelEnvelope", shSaa2StEnv, kMedSteel);
 877
 878
 879 ///////////////////////////////////
 880 //    SAA2 Pb Ring               //
 881 //    Drawing ALIP2A__0080       //
 882 //    Drawing ALIP2A__0111       //
 883 ///////////////////////////////////
 884 //
 885 // Rel. position in z
 886       Float_t zSaa2PbRing    = 35.25;
 887 // Length
 888       Float_t dzSaa2PbRing   = 65.90;
 889 // Inner radius
 890       Float_t rInSaa2PbRing  = 37.00;
 891 // Outer radius at front
 892       Float_t rOuSaa2PbRingF = 42.74;
 893 // Outer Rradius at rear
 894       Float_t rOuSaa2PbRingR = 44.58;
 895
 896       TGeoPcon* shSaa2PbRing  = new TGeoPcon(0., 360., 2);
 897       z = zSaa2PbRing;
 898       shSaa2PbRing->DefineSection(0, z, rInSaa2PbRing, rOuSaa2PbRingF);
 899       z += dzSaa2PbRing;
 900       shSaa2PbRing->DefineSection(1, z, rInSaa2PbRing, rOuSaa2PbRingR);
 901
 902       TGeoVolume* voSaa2PbRing  =  new TGeoVolume("YSAA2_PbRing", shSaa2PbRing, kMedPb);
 903
 904
 905 ///////////////////////////////////
 906 //    SAA2 Pb Components         //
 907 //    Drawing ALIP2A__0079       //
 908 ///////////////////////////////////
 909       tanAlpha = TMath::Tan(1.89 / 2. * kDegRad);
 910       TGeoPcon* shSaa2PbComp  = new TGeoPcon(0., 360., 16);
 911       // Total length
 912       Float_t dzSaa2PbComp    = 512.;
 913       // Length of 1st bellow recess
 914       Float_t dzSaa2PbCompB1  =  24.;
 915       // Length of 2nd bellow recess
 916       Float_t dzSaa2PbCompB2   = 27.;
 917       // Flange on the SAA1 side Detail A
 918       // 1st Step
 919       Float_t dzSaa2PbCompA1  =   1.5;
 920       Float_t rInSaa2PbCompA1 =  43.0/2.;
 921       Float_t rOuSaa2PbCompA1 =  53.0/2.;
 922       // 2nd Step
 923       Float_t dzSaa2PbCompA2  =   1.5;
 924       Float_t rInSaa2PbCompA2 =  36.8/2.;
 925       Float_t rOuSaa2PbCompA2 =  rOuSaa2PbCompA1;
 926       // Straight section
 927       Float_t dzSaa2PbCompA3  =  21.0;
 928       Float_t rInSaa2PbCompA3 =  rInSaa2PbCompA2;
 929       Float_t rOuSaa2PbCompA3 =  65.2/2.;
 930       //
 931       // 1st Section (outer straight, inner 1.89/2. deg opening cone)
 932       // Length
 933       Float_t dzSaa2PbComp1   = 146.15;
 934       // Inner radius at the end
 935       Float_t rInSaa2PbComp1  = rInSaa2PbCompA3 + dzSaa2PbComp1 * tanAlpha;
 936       // Outer radius
 937       Float_t rOuSaa2PbComp1  = rOuSaa2PbCompA3;
 938       //
 939       // 2nd Section (outer straight, inner 1.89/2. deg opening cone)
 940       // Length
 941       Float_t dzSaa2PbComp2   = (dzSaa2PbComp - dzSaa2PbComp1 - dzSaa2PbCompB1 - dzSaa2PbCompB2);
 942       // Inner radius at the end
 943       Float_t rInSaa2PbComp2  = rInSaa2PbComp1 + dzSaa2PbComp2 * tanAlpha;
 944       // Outer radius
 945       Float_t rOuSaa2PbComp2  = 86.6/2.;
 946       //
 947       // Flange on the SAA3 side (Detail E)
 948       //
 949       // Straight Section
 950       // Length  dzSaa2PbCompB2 - 8.8 = 27 - 8.8 = 18.2
 951       Float_t dzSaa2PbCompE1  =  18.2;
 952       Float_t rInSaa2PbCompE1 =  52.0/2.;
 953       Float_t rOuSaa2PbCompE1 =  86.6/2.;
 954       // 45 deg transition
 955       Float_t dzSaa2PbCompE2  =   2.7;
 956       // 1st Step
 957       Float_t dzSaa2PbCompE3  =   0.6;
 958       Float_t rInSaa2PbCompE3 =  52.0/2.+ dzSaa2PbCompE2;
 959       Float_t rOuSaa2PbCompE3 =  83.0/2.;
 960       // 2nd Step
 961       Float_t dzSaa2PbCompE4  =   4.0;
 962       Float_t rOuSaa2PbCompE4 =  61.6/2.;
 963       // end
 964       Float_t dzSaa2PbCompE5  =   1.5;
 965
 966
 967       //
 968       // Flange on SAA1 side (Detail A)
 969       z = 0.;
 970       // 1st Step
 971       shSaa2PbComp->DefineSection(  0,  z, rInSaa2PbCompA1, rOuSaa2PbCompA1);
 972       z += dzSaa2PbCompA1;
 973       shSaa2PbComp->DefineSection(  1,  z, rInSaa2PbCompA1, rOuSaa2PbCompA1);
 974       shSaa2PbComp->DefineSection(  2,  z, rInSaa2PbCompA2, rOuSaa2PbCompA2);
 975       // 2nd Step
 976       z += dzSaa2PbCompA2;
 977       shSaa2PbComp->DefineSection(  3,  z, rInSaa2PbCompA2, rOuSaa2PbCompA2);
 978       shSaa2PbComp->DefineSection(  4,  z, rInSaa2PbCompA3, rOuSaa2PbCompA3);
 979       // straight section
 980       z += dzSaa2PbCompA3;
 981       shSaa2PbComp->DefineSection(  5,  z, rInSaa2PbCompA3, rOuSaa2PbCompA3);
 982       //
 983       // Section 1
 984       z += dzSaa2PbComp1;
 985       shSaa2PbComp->DefineSection(  6,  z, rInSaa2PbComp1, rOuSaa2PbComp1);
 986       //
 987       // Section 2
 988       shSaa2PbComp->DefineSection(  7,  z, rInSaa2PbComp2, rOuSaa2PbComp2);
 989       z += dzSaa2PbComp2;
 990       shSaa2PbComp->DefineSection(  8,  z, rInSaa2PbComp2, rOuSaa2PbComp2);
 991       //
 992       // Flange SAA3 side (Detail E)
 993       z += dzSaa2PbCompE1;
 994       shSaa2PbComp->DefineSection(  9,  z, rInSaa2PbCompE1, rOuSaa2PbCompE1);
 995       // 45 deg transition
 996       z += dzSaa2PbCompE2;
 997       shSaa2PbComp->DefineSection( 10,  z, rInSaa2PbCompE3, rOuSaa2PbCompE1);
 998       // 1st step
 999       z += dzSaa2PbCompE3;
1000       shSaa2PbComp->DefineSection( 11,  z, rInSaa2PbCompE3, rOuSaa2PbCompE1);
1001       shSaa2PbComp->DefineSection( 12,  z, rInSaa2PbCompE3, rOuSaa2PbCompE3);
1002       // 2nd step
1003       z += dzSaa2PbCompE4;
1004       shSaa2PbComp->DefineSection( 13,  z, rInSaa2PbCompE3, rOuSaa2PbCompE3);
1005       shSaa2PbComp->DefineSection( 14,  z, rInSaa2PbCompE3, rOuSaa2PbCompE4);
1006       // end
1007       z += dzSaa2PbCompE5;
1008       shSaa2PbComp->DefineSection( 15,  z, rInSaa2PbCompE3, rOuSaa2PbCompE4);
1009
1010       TGeoVolume* voSaa2PbComp  =  new TGeoVolume("YSAA2_PbComp", shSaa2PbComp, kMedPbSh);
1011
1012
1013 ///////////////////////////////////
1014 //    SAA2 Inner Tube            //
1015 //    Drawing ALIP2A__0083       //
1016 ///////////////////////////////////
1017 //
1018 //
1019 //
1020 // Length of saa2:               512.0 cm
1021 // Length of inner tube:         501.7 cm
1022 // Lenth of bellow recess:        10.3 cm   ( 1.5 + 8.8)
1023 // Radius at entrance 36.8/2,  d = 0.1
1024 // Radius at exit     52.0/2,  d = 0.1
1025 //
1026       const Float_t kSaa2InnerTubeL     =  501.7;    // Length of the tube
1027       const Float_t kSaa2InnerTubeRmin  =  36.6/2.;  // Radius at entrance
1028       const Float_t kSaa2InnerTubeRmax  =  51.8/2.;  // Radius at exit
1029       const Float_t kSaa2InnerTubeD     =   0.2   ;  // Thickness
1030       TGeoPcon*   shSaa2InnerTube = new TGeoPcon(0., 360., 4);
1031       z = 0.;
1032       shSaa2InnerTube->DefineSection( 0, z, kSaa2InnerTubeRmin - kSaa2InnerTubeD, kSaa2InnerTubeRmin);
1033       z += dzSaa2PbCompA2 + dzSaa2PbCompA3;
1034       shSaa2InnerTube->DefineSection( 1, z, kSaa2InnerTubeRmin - kSaa2InnerTubeD, kSaa2InnerTubeRmin);
1035       z =  kSaa2InnerTubeL - dzSaa2PbCompE1;
1036       shSaa2InnerTube->DefineSection( 2, z, kSaa2InnerTubeRmax - kSaa2InnerTubeD, kSaa2InnerTubeRmax);
1037       z =  kSaa2InnerTubeL;
1038       shSaa2InnerTube->DefineSection( 3, z, kSaa2InnerTubeRmax - kSaa2InnerTubeD, kSaa2InnerTubeRmax);
1039       TGeoVolume* voSaa2InnerTube = new TGeoVolume("YSAA2_InnerTube", shSaa2InnerTube, kMedSteelSh);
1040
1041 ///////////////////////////////////
1042 //    SAA2 Steel Ring            //
1043 //    Drawing ALIP2A__0042       //
1044 ///////////////////////////////////
1045       //  HalfWidth
1046       Float_t dzSaa2SteelRing = 2.;
1047       TGeoTube*   shSaa2SteelRing  = new TGeoTube(41.6, 47.6, dzSaa2SteelRing);
1048       TGeoVolume* voSaa2SteelRing  = new TGeoVolume("YSAA2_SteelRing", shSaa2SteelRing, kMedSteel);
1049
1050 ///////////////////////////////////
1051 //    SAA2 Outer Shape           //
1052 //    Drawing ALIP2A__0108       //
1053 ///////////////////////////////////
1054
1055       TGeoPcon* shSaa2  = new TGeoPcon(0., 360., 16);
1056       kSec = 0.02; // security distance to avoid trivial extrusions
1057       rmin = kSaa2InnerTubeRmin - kSaa2InnerTubeD - kSec;
1058       rmax = kSaa2InnerTubeRmax - kSaa2InnerTubeD - kSec;
1059       // Flange SAA1 side
1060       z = 0.;
1061       shSaa2->DefineSection( 0, z, rmin           , rOuSaa2PbCompA1);
1062       z += dzSaa2PbCompA1 + dzSaa2PbCompA2;
1063       shSaa2->DefineSection( 1, z, rmin           , rOuSaa2PbCompA1);
1064       shSaa2->DefineSection( 2, z, rmin           , rInSaa2StEnv1 + dSt);
1065       z += dzSaa2PbCompA3;
1066       shSaa2->DefineSection( 3, z, rmin           , rInSaa2StEnv1 + dSt);
1067       z = zSaa2PbRing;
1068       shSaa2->DefineSection( 4, z, 0.             , rInSaa2StEnv1 + dSt);
1069       shSaa2->DefineSection( 5, z, 0.             , rOuSaa2PbRingF);
1070       z += dzSaa2PbRing;
1071       shSaa2->DefineSection( 6, z, 0.             , rOuSaa2PbRingR);
1072       shSaa2->DefineSection( 7, z, 0.             , rInSaa2StEnv1 + dSt);
1073       z = dzSaa2PbCompA1 + dzSaa2PbCompA2 + dzSaa2StEnv1;
1074       shSaa2->DefineSection( 8, z, 0.             , rInSaa2StEnv1 + dSt);
1075       shSaa2->DefineSection( 9, z, 0.             , rInSaa2StEnv2 + dSt);
1076       z = dzSaa2PbComp - dzSaa2PbCompB2;
1077       shSaa2->DefineSection(10, z, rmax           , rInSaa2StEnv2 + dSt);
1078       z += dzSaa2PbCompE1;
1079       shSaa2->DefineSection(11, z, rmax           , rInSaa2StEnv2 + dSt);
1080       z += dzSaa2PbCompE2;
1081       shSaa2->DefineSection(12, z, rInSaa2PbCompE3, rInSaa2StEnv2 + dSt);
1082       z += (dzSaa2PbCompE3 + dzSaa2PbCompE4);
1083       shSaa2->DefineSection(13, z, rInSaa2PbCompE3, rInSaa2StEnv2 + dSt);
1084       shSaa2->DefineSection(14, z, rInSaa2PbCompE3, rOuSaa2PbCompE4);
1085       z += dzSaa2PbCompE5;
1086       shSaa2->DefineSection(15, z, rInSaa2PbCompE3, rOuSaa2PbCompE4);
1087
1088       TGeoVolume* voSaa2  =  new TGeoVolume("YSAA2", shSaa2, kMedAir);
1089       voSaa2->SetVisibility(0);
1090 // Inner 1.89/2 deg line
1091       Double_t zref   = dzSaa2PbCompA1 + dzSaa2PbCompA2 + dzSaa2PbCompA3;
1092       for (Int_t i  = 4; i < 10; i++) {
1093           Double_t z    = shSaa2->GetZ(i);
1094           Double_t r2 = shSaa2->GetRmax(i);
1095           Double_t r1 = rmin + (z -  zref) * TMath::Tan(1.89 / 2. * kDegRad) - kSec;
1096           shSaa2->DefineSection(i, z, r1, r2);
1097       }
1098
1099 //
1100 //    Assemble SAA2
1101       voSaa2->AddNode(voSaa2StEnv,     1, gGeoIdentity);
1102       voSaa2->AddNode(voSaa2PbRing,    1, gGeoIdentity);
1103       voSaa2->AddNode(voSaa2PbComp,    1, gGeoIdentity);
1104       voSaa2->AddNode(voSaa2InnerTube, 1, new TGeoTranslation(0., 0., dzSaa2PbCompA1));
1105       z = (dzSaa2PbComp - dzSaa2PbCompE4 - dzSaa2PbCompE5) + dzSaa2SteelRing;
1106       voSaa2->AddNode(voSaa2SteelRing, 1, new TGeoTranslation(0., 0., z));
1107
1108
1109 ///////////////////////////////////////
1110 //                SAA3               //
1111 ///////////////////////////////////////
1112 //
1113 //
1114 //  This is a study performed by S. Maridor
1115 //  The SAA3 has not yet been designed !!!!!!!!
1116 //
1117 ///////////////////////////////////
1118 //    SAA3 Outer Shape           //
1119 //    Drawing ALIP2A__0xxx       //
1120 ///////////////////////////////////
1121
1122       TGeoVolumeAssembly* voSaa3  = new TGeoVolumeAssembly("YSAA3");
1123
1124 ///////////////////////////////////
1125 //    SAA3 Steel Components      //
1126 //    Drawing ALIP2A__0xxx       //
1127 ///////////////////////////////////
1128 //    Block
1129       TGeoBBox* shSaa3CCBlockO   = new TGeoBBox(80./2., 80./2., 100./2.);
1130       shSaa3CCBlockO->SetName("Saa3CCBlockO");
1131
1132       TGeoPcon* shSaa3InnerRegion  = new TGeoPcon(0., 360., 6);
1133       shSaa3InnerRegion->DefineSection( 0, -60.0, 0., 56.6/2.);
1134       shSaa3InnerRegion->DefineSection( 1, -45.0, 0., 56.6/2.);
1135       shSaa3InnerRegion->DefineSection( 2, -42.0, 0., 50.6/2.);
1136       shSaa3InnerRegion->DefineSection( 3, -30.0, 0., 50.6/2.);
1137       shSaa3InnerRegion->DefineSection( 4,  30.5, 0., 16.8/2.);
1138       shSaa3InnerRegion->DefineSection( 5,  60.0, 0., 16.8/2.);
1139       shSaa3InnerRegion->SetName("Saa3InnerRegion");
1140
1141       TGeoCompositeShape* shSaa3CCBlock = new TGeoCompositeShape("Saa3CCBlock", "Saa3CCBlockO-Saa3InnerRegion");
1142       TGeoVolume* voSaa3CCBlock         = new TGeoVolume("YSAA3CCBlock", shSaa3CCBlock, kMedConcSh);
1143
1144
1145       voSaa3->AddNode(voSaa3CCBlock, 1, gGeoIdentity);
1146
1147 //    Plate 1: 240 cm x 80 cm x 100 cm (x 2)
1148       TGeoVolume* voSaa3SteelPlate1  =  new TGeoVolume("YSAA3SteelPlate1",
1149                                                        new TGeoBBox(240./2., 80./2., 100./2.),
1150                                                        kMedSteelSh);
1151       TGeoVolume* voSaa3SteelPlate11 =  new TGeoVolume("YSAA3SteelPlate11",
1152                                                        new TGeoBBox(240./2., 80./2., 10./2.),
1153                                                        kMedSteel);
1154       voSaa3SteelPlate1->AddNode(voSaa3SteelPlate11, 1, new TGeoTranslation(0., 0., -45.));
1155       voSaa3->AddNode(voSaa3SteelPlate1, 1, new TGeoTranslation(0., +80., 0.));
1156       voSaa3->AddNode(voSaa3SteelPlate1, 2, new TGeoTranslation(0., -80., 0.));
1157
1158
1159 //    Plate 2:  80 cm x 80 cm x 100 cm (x 2)
1160       TGeoVolume* voSaa3SteelPlate2  =  new TGeoVolume("YSAA3SteelPlate2",
1161                                                        new TGeoBBox( 80./2., 80./2., 100./2.),
1162                                                        kMedSteelSh);
1163       TGeoVolume* voSaa3SteelPlate21 =  new TGeoVolume("YSAA3SteelPlate21",
1164                                                        new TGeoBBox( 80./2., 80./2., 10./2.),
1165                                                        kMedSteel);
1166       voSaa3SteelPlate2->AddNode(voSaa3SteelPlate21, 1, new TGeoTranslation(0., 0., -45.));
1167
1168       voSaa3->AddNode(voSaa3SteelPlate2, 1, new TGeoTranslation(+80, 0., 0.));
1169       voSaa3->AddNode(voSaa3SteelPlate2, 2, new TGeoTranslation(-80, 0., 0.));
1170
1171
1172 ///////////////////////////////////
1173 //    Muon Filter                //
1174 //    Drawing ALIP2A__0105       //
1175 ///////////////////////////////////
1176       // Half Length
1177       Float_t dzMuonFilter = 60.;
1178
1179       TGeoBBox*   shMuonFilterO  = new TGeoBBox(550./2., 620./2., dzMuonFilter);
1180       shMuonFilterO->SetName("FilterO");
1181       TGeoTube*   shMuonFilterI  = new TGeoTube(0., 50., dzMuonFilter + 5.);
1182       shMuonFilterI->SetName("FilterI");
1183       TGeoCompositeShape* shMuonFilter = new TGeoCompositeShape("MuonFilter", "FilterO-FilterI");
1184       //
1185       // !!!!! Needs to be inclined
1186       TGeoVolume* voMuonFilter = new TGeoVolume("YMuonFilter", shMuonFilter, kMedSteel);
1187
1188       // Inner part with higher transport cuts
1189       Float_t dzMuonFilterH = 50.;
1190       TGeoBBox*   shMuonFilterOH  = new TGeoBBox(550./2., 620./2., dzMuonFilterH);
1191       shMuonFilterOH->SetName("FilterOH");
1192       TGeoTube*   shMuonFilterIH  = new TGeoTube(0., 50., dzMuonFilterH + 5.);
1193       shMuonFilterIH->SetName("FilterIH");
1194       TGeoCompositeShape* shMuonFilterH = new TGeoCompositeShape("MuonFilterH", "FilterOH-FilterIH");
1195       TGeoVolume* voMuonFilterH = new TGeoVolume("YMuonFilterH", shMuonFilterH, kMedSteelSh);
1196       voMuonFilter->AddNode(voMuonFilterH, 1, gGeoIdentity);
1197
1198 //
1199       TGeoVolumeAssembly* voSaa  = new TGeoVolumeAssembly("YSAA");
1200 //
1201 //
1202 //
1203 //
1204 //
1205 //    Starting position of the FA Flange/Tail
1206       Float_t ziFaWTail   = 499.0;
1207 //    End of the FA Flange/Tail
1208       Float_t zoFaWTail   = ziFaWTail + dzFaWTail;
1209 //    Starting position of the FA/SAA1 Joint (2.8 cm overlap with tail)
1210       Float_t ozFaSaa1    = 2.8;
1211       Float_t ziFaSaa1    = zoFaWTail - ozFaSaa1;
1212 //    End of the FA/SAA1 Joint
1213       Float_t zoFaSaa1    = ziFaSaa1 +  dzFaSaa1;
1214 //    Starting position of SAA1 (2.0 cm overlap with joint)
1215       Float_t ozSaa1      = 2.;
1216       Float_t ziSaa1      = zoFaSaa1 - ozSaa1;
1217 //    End of SAA1
1218       Float_t zoSaa1      = ziSaa1 + dzSaa1;
1219 //    Starting position of SAA1/SAA2 Joint (1.95 cm overlap with SAA1)
1220       Float_t ziSaa1Saa2  = zoSaa1 - 1.95;
1221 //    End of SAA1/SAA2 Joint
1222       Float_t zoSaa1Saa2  = ziSaa1Saa2 + dzSaa1Saa2;
1223 //    Starting position of SAA2 (3.1 cm overlap with the joint)
1224       Float_t ziSaa2      = zoSaa1Saa2 - 3.1;
1225 //    End of SAA2
1226       Float_t zoSaa2      = ziSaa2 + dzSaa2PbComp;
1227 //    Position of SAA3
1228       Float_t zcSaa3      = zoSaa2 + 50.;
1229 //    Position of the Muon Filter
1230       Float_t zcFilter    = 1465.9 + dzMuonFilter;
1231
1232       voSaa->AddNode(voFaWTail,    1, new TGeoTranslation(0., 0., ziFaWTail));
1233       voSaa->AddNode(voFaSaa1,     1, new TGeoTranslation(0., 0., ziFaSaa1));
1234       voSaa->AddNode(voSaa1 ,      1, new TGeoTranslation(0., 0., ziSaa1));
1235       voSaa->AddNode(voSaa1Saa2,   1, new TGeoTranslation(0., 0., ziSaa1Saa2));
1236       voSaa->AddNode(voSaa2 ,      1, new TGeoTranslation(0., 0., ziSaa2));
1237       voSaa->AddNode(voSaa3,       1, new TGeoTranslation(0., 0., zcSaa3));
1238
1239
1240       TGeoRotation* rotxz  = new TGeoRotation("rotxz",   90.,   0., 90.,  90., 180., 0.);
1241       top->AddNode(voSaa, 1, new TGeoCombiTrans(0., 0., 0., rotxz));
1242 //
1243 //  Mother volume for muon stations 1+2 and shielding material placed between the quadrants
1244 //
1245       // Position of the dipole
1246       Float_t ziDipole = 724.45;
1247
1248       TGeoPcon* shYOUT1 = new TGeoPcon(0., 360., 25);
1249       Float_t eps = 1.e-2;
1250       // FA Tail Section
1251       for (Int_t iz =  0; iz < 9; iz++) {
1252           z = shFaWTail->GetZ(iz+1);
1253           if (iz == 8) z -= ozFaSaa1;
1254           shYOUT1->DefineSection(iz, z + ziFaWTail, shFaWTail->GetRmax(iz+1) + eps, 150.);
1255       }
1256       // FA-SAA1 Joint
1257       z = shYOUT1->GetZ(8);
1258
1259       for (Int_t iz =  9; iz < 17; iz++)
1260           shYOUT1->DefineSection(iz, z + shFaSaa1->GetZ(iz-9), shFaSaa1->GetRmax(iz-9) + eps, 150.);
1261
1262       z = shYOUT1->GetZ(16) - ozSaa1;
1263       // SAA1  - Dipole
1264       for (Int_t iz = 17; iz < 24; iz++)
1265           shYOUT1->DefineSection(iz, z + shSaa1M->GetZ(iz-13), shSaa1M->GetRmax(iz-13) + eps, 150.);
1266       // Distance between dipole and start of SAA1 2deg opening cone
1267       dz   = ziDipole - (zSaa1StEnv[0] - dSt + zSaa1StEnvS + ziSaa1);
1268       rOut = rOuSaa1StEnv2 + dz * TMath::Tan(2. * kDegRad);
1269
1270       shYOUT1->DefineSection(24, ziDipole, rOut + eps, 150.);
1271
1272       InvertPcon(shYOUT1);
1273       TGeoVolume* voYOUT1 = new TGeoVolume("YOUT1", shYOUT1, kMedAirMu);
1274       voYOUT1->SetVisibility(0);
1275
1276       voYOUT1->AddNode(asSaa1ExtraShield, 1, new TGeoCombiTrans(0., 0., - (100.7 + 62.2 + saa1ExtraShieldL / 2. + ziFaWTail), rotxz));
1277       voYOUT1->AddNode(asFaExtraShield,   1, new TGeoCombiTrans(0., 0., - (16.41 + kFaWring2HWidth + ziFaWTail), rotxz));
1278       top->AddNode(voYOUT1, 1, gGeoIdentity);
1279 //
1280 //  Mother volume for muon stations 4+5 and trigger stations.
1281 //
1282       Float_t zoDipole = 1235.55;
1283
1284       TGeoPcon* shYOUT2 = new TGeoPcon(0., 360., 14);
1285       z =  zoDipole;
1286       shYOUT2->DefineSection(0, z,             rOuSaa1String,       252.);
1287 //    Start of SAA1-SAA2
1288       z = ziSaa1Saa2;
1289       shYOUT2->DefineSection(1, z,             rOuSaa1String,       252.);
1290       shYOUT2->DefineSection(2, z,             rOuSaa1Saa2Steel,    252.);
1291 //    End of SAA1-SAA2
1292       z = ziSaa2;
1293       shYOUT2->DefineSection(3, z,             rOuSaa1Saa2Steel,    252.);
1294 //    SAA2
1295       shYOUT2->DefineSection( 4, z,            rInSaa2StEnv1 + dSt, 252.);
1296       z = ziSaa2 + zSaa2PbRing;
1297       shYOUT2->DefineSection( 5, z,            rInSaa2StEnv1 + dSt, 252.);
1298 //    Pb Cone
1299       shYOUT2->DefineSection( 6, z,            rOuSaa2PbRingF,      252.);
1300       rmin = rOuSaa2PbRingF + (1380. - z) * TMath::Tan(1.6 * kDegRad);
1301       shYOUT2->DefineSection( 7, 1380., rmin, 252.);
1302       shYOUT2->DefineSection( 8, 1380., rmin, 304.);
1303       z = ziSaa2 + zSaa2PbRing + dzSaa2PbRing;
1304       shYOUT2->DefineSection( 9, z,            rOuSaa2PbRingR,      304.);
1305 //    Straight Sections
1306       shYOUT2->DefineSection(10, z,            rInSaa2StEnv1 + dSt, 460.);
1307       z = ziSaa2 + dzSaa2StEnv1;
1308       shYOUT2->DefineSection(11, z,            rInSaa2StEnv1 + dSt, 460.);
1309       shYOUT2->DefineSection(12, z,            rInSaa2StEnv2 + dSt, 460.);
1310       z += dzSaa2StEnv2;
1311       shYOUT2->DefineSection(13, z,            rInSaa2StEnv2 + dSt, 460.);
1312
1313       InvertPcon(shYOUT2);
1314       TGeoVolume* voYOUT2 = new TGeoVolume("YOUT2", shYOUT2, kMedAirMu);
1315       voYOUT2->SetVisibility(0);
1316       voYOUT2->AddNode(voMuonFilter, 1, new TGeoTranslation(0., 0., -zcFilter));
1317       top->AddNode(voYOUT2, 1, gGeoIdentity);
1318 }
1319
1320 void AliSHILv3::Init()
1321 {
1322   //
1323   // Initialise the muon shield after it has been built
1324   //
1325   Int_t i;
1326   //
1327   if(AliLog::GetGlobalDebugLevel()>0) {
1328     printf("\n%s: ",ClassName());
1329     for(i=0;i<35;i++) printf("*");
1330     printf(" SHILv3_INIT ");
1331     for(i=0;i<35;i++) printf("*");
1332     printf("\n%s: ",ClassName());
1333     //
1334     // Here the SHIL initialisation code (if any!)
1335     for(i=0;i<80;i++) printf("*");
1336     printf("\n");
1337   }
1338 }
1339
1340 void AliSHILv3::InvertPcon(TGeoPcon* pcon)
1341 {
1342 //
1343 //  z -> -z
1344 //
1345     Int_t nz = pcon->GetNz();
1346     Double_t* z    = new Double_t[nz];
1347     Double_t* rmin = new Double_t[nz];
1348     Double_t* rmax = new Double_t[nz];
1349
1350     Double_t*  z0    = pcon->GetZ();
1351     Double_t*  rmin0 = pcon->GetRmin();
1352     Double_t*  rmax0 = pcon->GetRmax();
1353
1354     for (Int_t i = 0; i < nz; i++) {
1355         z[i] = z0[i];
1356         rmin[i] = rmin0[i];
1357         rmax[i] = rmax0[i];
1358     }
1359
1360     for (Int_t i = 0; i < nz; i++) {
1361         Int_t j = nz - i - 1;
1362         pcon->DefineSection(i, - z[j], rmin[j], rmax[j]);
1363     }
1364
1365     delete[] z;
1366     delete[] rmin;
1367     delete[] rmax;
1368 }
1369
1370 TGeoPcon* AliSHILv3::MakeShapeFromTemplate(TGeoPcon* pcon, Float_t drMin, Float_t drMax)
1371 {
1372     //
1373     // Returns new shape based on a template changing
1374     // the inner radii by drMin and the outer radii by drMax.
1375     //
1376     Int_t nz = pcon->GetNz();
1377     TGeoPcon* cpcon = new TGeoPcon(0., 360., nz);
1378     for (Int_t i = 0; i < nz; i++)
1379         cpcon->DefineSection(i, pcon->GetZ(i), pcon->GetRmin(i) + drMin, pcon->GetRmax(i) + drMax);
1380     return cpcon;
1381 }
1382
1383