1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 //-------------------------------------------------------------------------
19 // The small angle absorber SAA (beam shield)
21 // andreas.morsch@cern.ch
22 //-------------------------------------------------------------------------
24 #include <TVirtualMC.h>
26 #include <TGeoVolume.h>
28 #include <TGeoManager.h>
29 #include <TGeoMatrix.h>
30 #include <TGeoCompositeShape.h>
35 #include "AliSHILv3.h"
41 //_____________________________________________________________________________
42 AliSHILv3::AliSHILv3()
45 // Default constructor for muon shield
49 //_____________________________________________________________________________
50 AliSHILv3::AliSHILv3(const char *name, const char *title)
54 // Standard constructor for muon shield
58 //_____________________________________________________________________________
59 void AliSHILv3::CreateGeometry()
62 // The geometry of the small angle absorber "Beam Shield"
64 Float_t dz, dr, z, rmax;
68 TGeoVolume* top = gGeoManager->GetVolume("ALIC");
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.);
75 TGeoRotation* rotxzlhc = new TGeoRotation("rotxzlhc", 0., -alhc, 0.);
76 TGeoRotation* rotlhc = new TGeoRotation("rotlhc", 0., alhc, 0.);
81 TGeoMedium* kMedNiW = gGeoManager->GetMedium("SHIL_Ni/W0");
82 TGeoMedium* kMedNiWsh = gGeoManager->GetMedium("SHIL_Ni/W3");
84 TGeoMedium* kMedSteel = gGeoManager->GetMedium("SHIL_ST_C0");
85 TGeoMedium* kMedSteelSh = gGeoManager->GetMedium("SHIL_ST_C3");
87 TGeoMedium* kMedAir = gGeoManager->GetMedium("SHIL_AIR_C0");
88 TGeoMedium* kMedAirMu = gGeoManager->GetMedium("SHIL_AIR_MUON");
90 TGeoMedium* kMedPb = gGeoManager->GetMedium("SHIL_PB_C0");
91 TGeoMedium* kMedPbSh = gGeoManager->GetMedium("SHIL_PB_C2");
93 TGeoMedium* kMedConcSh = gGeoManager->GetMedium("SHIL_CC_C2");
95 TGeoMedium* kMedCastiron = gGeoManager->GetMedium("SHIL_CAST_IRON0");
96 TGeoMedium* kMedCastironSh = gGeoManager->GetMedium("SHIL_CAST_IRON2");
98 const Float_t kDegRad = TMath::Pi() / 180.;
99 const Float_t kAngle02 = TMath::Tan( 2.00 * kDegRad);
100 const Float_t kAngle0071 = TMath::Tan( 0.71 * kDegRad);
103 ///////////////////////////////////
104 // FA Tungsten Tail //
105 // Drawing ALIP2A__0049 //
106 // Drawing ALIP2A__0111 //
107 ///////////////////////////////////
109 // The tail as built is shorter than in drawing ALIP2A__0049.
110 // The CDD data base has to be updated !
112 // Inner radius at the entrance of the flange
113 Float_t rInFaWTail1 = 13.98/2.;
114 // Outer radius at the entrance of the flange
115 Float_t rOuFaWTail1 = 52.00/2.;
116 // Outer radius at the end of the section inside the FA
117 Float_t rOuFaWTail2 = 35.27/2.;
118 // Length of the Flange section inside the FA
119 Float_t dzFaWTail1 = 6.00;
120 // Length of the Flange section ouside the FA
121 Float_t dzFaWTail2 = 12.70;
122 // Inner radius at the end of the section inside the FA
123 Float_t rInFaWTail2 = rInFaWTail1 + dzFaWTail1 * kAngle0071;
124 // Inner radius at the end of the flange
125 Float_t rInFaWTail3 = rInFaWTail2 + dzFaWTail2 * kAngle0071;
126 // Outer radius at the end of the flange
127 Float_t rOuFaWTail3 = rOuFaWTail2 + dzFaWTail2 * kAngle02;
128 // Outer radius of the recess for station 1
129 Float_t rOuFaWTailR = 30.8/2.;
130 // Length of the recess
131 Float_t dzFaWTailR = 36.00;
132 // Inner radiues at the end of the recess
133 Float_t rInFaWTail4 = rInFaWTail3 + dzFaWTailR * kAngle0071;
134 // Outer radius at the end of the recess
135 Float_t rOuFaWTail4 = rOuFaWTail3 + dzFaWTailR * kAngle02;
136 // Inner radius of the straight section
137 Float_t rInFaWTailS = 22.30/2.;
138 // Length of the bulge
139 Float_t dzFaWTailB = 13.0;
140 // Outer radius at the end of the bulge
141 Float_t rOuFaWTailB = rOuFaWTail4 + dzFaWTailB * kAngle02;
142 // Outer radius at the end of the tail
143 Float_t rOuFaWTailE = 31.6/2.;
144 // Total length of the tail
145 Float_t dzFaWTail = 70.7;
147 TGeoPcon* shFaWTail = new TGeoPcon(0., 360., 10);
149 // Flange section inside FA
150 shFaWTail->DefineSection(0, z, rInFaWTail1, rOuFaWTail1);
152 shFaWTail->DefineSection(1, z, rInFaWTail2, rOuFaWTail1);
153 shFaWTail->DefineSection(2, z, rInFaWTail2, rOuFaWTail2);
154 // Flange section outside FA
156 shFaWTail->DefineSection(3, z, rInFaWTail3, rOuFaWTail3);
157 shFaWTail->DefineSection(4, z, rInFaWTail3, rOuFaWTailR);
160 shFaWTail->DefineSection(5, z, rInFaWTail4, rOuFaWTailR);
161 shFaWTail->DefineSection(6, z, rInFaWTailS, rOuFaWTail4);
164 shFaWTail->DefineSection(7, z, rInFaWTailS, rOuFaWTailB);
165 shFaWTail->DefineSection(8, z, rInFaWTailS, rOuFaWTailE);
168 shFaWTail->DefineSection(9, z, rInFaWTailS, rOuFaWTailE);
170 TGeoVolume* voFaWTail = new TGeoVolume("YFaWTail", shFaWTail, kMedNiW);
172 // Define an inner region with higher transport cuts
173 TGeoPcon* shFaWTailI = new TGeoPcon(0., 360., 4);
176 shFaWTailI->DefineSection(0, z, rInFaWTail1, rInFaWTail1 + dr);
177 z += (dzFaWTail1 + dzFaWTail2 + dzFaWTailR);
178 shFaWTailI->DefineSection(1, z, rInFaWTail4, rInFaWTail4 + dr);
179 shFaWTailI->DefineSection(2, z, rInFaWTailS, rInFaWTailS + dr);
181 shFaWTailI->DefineSection(3, z, rInFaWTailS, rInFaWTailS + dr);
182 TGeoVolume* voFaWTailI = new TGeoVolume("YFaWTailI", shFaWTailI, kMedNiWsh);
183 voFaWTail->AddNode(voFaWTailI, 1, gGeoIdentity);
185 ///////////////////////////////////
187 // Recess Station 1 //
188 // Drawing ALIP2A__0260 //
189 ///////////////////////////////////
191 ///////////////////////////////////
193 // Drawing ALIP2A__0220 //
194 ///////////////////////////////////
195 const Float_t kFaWring2Rinner = 15.41;
196 const Float_t kFaWring2Router = 18.40;
197 const Float_t kFaWring2HWidth = 3.75;
198 const Float_t kFaWring2Cutoffx = 3.35;
199 const Float_t kFaWring2Cutoffy = 3.35;
200 TGeoTubeSeg* shFaWring2a = new TGeoTubeSeg(kFaWring2Rinner, kFaWring2Router, kFaWring2HWidth, 0., 90.);
201 shFaWring2a->SetName("shFaWring2a");
202 TGeoBBox* shFaWring2b = new TGeoBBox(kFaWring2Router / 2., kFaWring2Router / 2., kFaWring2HWidth);
203 shFaWring2b->SetName("shFaWring2b");
204 TGeoTranslation* trFaWring2b
205 = new TGeoTranslation("trFaWring2b", kFaWring2Router / 2. + kFaWring2Cutoffx, kFaWring2Router / 2. + kFaWring2Cutoffy, 0.);
206 trFaWring2b->RegisterYourself();
207 TGeoCompositeShape* shFaWring2 = new TGeoCompositeShape("shFaWring2", "(shFaWring2a)*(shFaWring2b:trFaWring2b)");
208 TGeoVolume* voFaWring2 = new TGeoVolume("YFA_WRING2", shFaWring2, kMedNiW);
210 ///////////////////////////////////
212 // Drawing ALIP2A__0219 //
213 ///////////////////////////////////
214 const Float_t kFaWring3Rinner = 15.41;
215 const Float_t kFaWring3Router = 18.40;
216 const Float_t kFaWring3HWidth = 3.75;
217 const Float_t kFaWring3Cutoffx = 3.35;
218 const Float_t kFaWring3Cutoffy = 3.35;
219 TGeoTubeSeg* shFaWring3a = new TGeoTubeSeg(kFaWring3Rinner, kFaWring3Router, kFaWring3HWidth, 0., 90.);
220 shFaWring3a->SetName("shFaWring3a");
221 TGeoBBox* shFaWring3b = new TGeoBBox(kFaWring3Router / 2., kFaWring3Router / 2., kFaWring3HWidth);
222 shFaWring3b->SetName("shFaWring3b");
223 TGeoTranslation* trFaWring3b
224 = new TGeoTranslation("trFaWring3b", kFaWring3Router / 2. + kFaWring3Cutoffx, kFaWring3Router / 2. + kFaWring3Cutoffy, 0.);
225 trFaWring3b->RegisterYourself();
226 TGeoCompositeShape* shFaWring3 = new TGeoCompositeShape("shFaWring3", "(shFaWring3a)*(shFaWring3b:trFaWring3b)");
227 TGeoVolume* voFaWring3 = new TGeoVolume("YFA_WRING3", shFaWring3, kMedNiW);
229 ///////////////////////////////////
231 // Drawing ALIP2A__0221 //
232 ///////////////////////////////////
233 const Float_t kFaWring5Rinner = 15.41;
234 const Float_t kFaWring5Router = 18.67;
235 const Float_t kFaWring5HWidth = 1.08;
236 TGeoVolume* voFaWring5 = new TGeoVolume("YFA_WRING5", new TGeoTube(kFaWring5Rinner, kFaWring5Router, kFaWring5HWidth), kMedNiW);
239 // Position the rings in the assembly
241 TGeoVolumeAssembly* asFaExtraShield = new TGeoVolumeAssembly("YCRE");
242 // Distance between rings
243 const Float_t kFaDWrings = 1.92;
247 dz += kFaWring2HWidth;
248 asFaExtraShield->AddNode(voFaWring2, 1, new TGeoCombiTrans(0., 0., dz, rot180));
249 asFaExtraShield->AddNode(voFaWring2, 2, new TGeoCombiTrans(0., 0., dz, rot000));
250 dz += kFaWring2HWidth;
252 dz += kFaWring3HWidth;
253 asFaExtraShield->AddNode(voFaWring3, 1, new TGeoCombiTrans(0., 0., dz, rot090));
254 asFaExtraShield->AddNode(voFaWring3, 2, new TGeoCombiTrans(0., 0., dz, rot270));
255 dz += kFaWring3HWidth;
256 dz += kFaWring5HWidth;
257 asFaExtraShield->AddNode(voFaWring5, 1, new TGeoTranslation(0., 0., dz));
258 dz += kFaWring5HWidth;
259 dz += kFaWring3HWidth;
260 asFaExtraShield->AddNode(voFaWring3, 3, new TGeoCombiTrans(0., 0., dz, rot180));
261 asFaExtraShield->AddNode(voFaWring3, 4, new TGeoCombiTrans(0., 0., dz, rot000));
262 dz += kFaWring3HWidth;
264 dz += kFaWring2HWidth;
265 asFaExtraShield->AddNode(voFaWring2, 3, new TGeoCombiTrans(0., 0., dz, rot090));
266 asFaExtraShield->AddNode(voFaWring2, 4, new TGeoCombiTrans(0., 0., dz, rot270));
267 dz += kFaWring2HWidth;
270 ///////////////////////////////////////
272 ///////////////////////////////////////
275 ///////////////////////////////////////
276 // FA/SAA1 W Joint //
277 // Drawing ALIP2A__0060 //
278 ///////////////////////////////////////
280 // Length of flange FA side
281 Float_t dzFaSaa1F1 = 2.8;
282 // Inner radius of flange FA side
283 Float_t rInFaSaa1F1 = 32.0/2.;
284 // Outer radius of flange FA side
285 Float_t rOuFaSaa1F1 = 39.5/2.;
286 // Length of first straight section
287 Float_t dzFaSaa1S1 = 18.5 - dzFaSaa1F1;
288 // Inner radius of first straight section
289 Float_t rInFaSaa1S1 = 22.3/2.;
290 // Length of 45 deg transition region
291 Float_t dzFaSaa1T1 = 2.2;
292 // Inner radius of second straight section
293 Float_t rInFaSaa1S2 = 17.9/2.;
294 // Length of second straight section
295 Float_t dzFaSaa1S2 = 10.1;
296 // Length of flange SAA1 side
297 // Float_t dzFaSaa1F2 = 4.0;
298 // Inner radius of flange FA side
299 Float_t rInFaSaa1F2 = 25.2/2.;
301 Float_t dzFaSaa1 = 34.8;
302 // Outer Radius at the end of the joint
303 Float_t rOuFaSaa1E = 41.93/2.;
306 TGeoPcon* shFaSaa1 = new TGeoPcon(0., 360., 8);
309 shFaSaa1->DefineSection( 0, z, rInFaSaa1F1, rOuFaSaa1F1 - 0.01);
311 shFaSaa1->DefineSection( 1, z, rInFaSaa1F1, 40.0);
312 shFaSaa1->DefineSection( 2, z, rInFaSaa1S1, 40.0);
313 // First straight section
315 shFaSaa1->DefineSection( 3, z, rInFaSaa1S1, 40.0);
316 // 45 deg transition region
318 shFaSaa1->DefineSection( 4, z, rInFaSaa1S2, 40.0);
319 // Second straight section
321 shFaSaa1->DefineSection( 5, z, rInFaSaa1S2, 40.0);
322 shFaSaa1->DefineSection( 6, z, rInFaSaa1F2, 40.0);
325 shFaSaa1->DefineSection( 7, z, rInFaSaa1F2, rOuFaSaa1E - 0.01);
328 for (Int_t i = 1; i < 7; i++) {
329 Double_t zp = shFaSaa1->GetZ(i);
330 Double_t r1 = shFaSaa1->GetRmin(i);
331 Double_t r2 = 39.5/2. + zp * TMath::Tan(2. * kDegRad) - 0.01;
332 shFaSaa1->DefineSection(i, zp, r1, r2);
334 TGeoVolume* voFaSaa1 = new TGeoVolume("YFASAA1", shFaSaa1, kMedNiWsh);
336 // Outer region with lower transport cuts
337 TGeoCone* shFaSaa1O = new TGeoCone(dzFaSaa1/2., rOuFaSaa1F1 - 3.5, rOuFaSaa1F1 - 0.01, rOuFaSaa1E - 3.5, rOuFaSaa1E - 0.01);
338 TGeoVolume* voFaSaa1O = new TGeoVolume("YFASAA1O", shFaSaa1O, kMedNiW);
339 voFaSaa1->AddNode(voFaSaa1O, 1, new TGeoTranslation(0., 0., dzFaSaa1/2.));
342 ///////////////////////////////////
343 // SAA1 Steel Envelope //
344 // Drawing ALIP2A__0039 //
345 ///////////////////////////////////
347 Float_t rOut; // Outer radius
348 // Thickness of the steel envelope
352 Float_t zSaa1StEnv[5] = {111.2, 113.7, 229.3, 195.0};
355 Float_t rOuSaa1StEnv1 = 40.4/2.;
356 Float_t rInSaa1StEnv1 = rOuSaa1StEnv1 - dSt - 0.05;
358 Float_t rInSaa1StEnv2 = 41.7/2.;
359 Float_t rOuSaa1StEnv2 = rInSaa1StEnv2 + dSt / TMath::Cos(2.0 * kDegRad) - 0.05;
361 Float_t rOuSaa1StEnv3 = 57.6/2.;
362 Float_t rInSaa1StEnv3 = rOuSaa1StEnv3 - dSt + 0.05;
364 Float_t rInSaa1StEnv4 = 63.4/2.;
365 Float_t rOuSaa1StEnv4 = rInSaa1StEnv4 + dSt / TMath::Cos(1.6 * kDegRad) - 0.05;
367 Float_t rInSaa1StEnv5 = 74.28/2.;
368 Float_t rOuSaa1StEnv5 = rInSaa1StEnv5 + dSt / TMath::Cos(1.6 * kDegRad) - 0.05;
369 // Relative starting position
370 Float_t zSaa1StEnvS = 3.;
372 TGeoPcon* shSaa1StEnv = new TGeoPcon(0., 360., 11);
375 shSaa1StEnv->DefineSection( 0, z, rInSaa1StEnv1, rOuSaa1StEnv1);
376 z += (zSaa1StEnv[0] - dSt);
377 shSaa1StEnv->DefineSection( 1, z, rInSaa1StEnv1, rOuSaa1StEnv1);
379 shSaa1StEnv->DefineSection( 2, z, rInSaa1StEnv1, rOuSaa1StEnv2);
381 shSaa1StEnv->DefineSection( 3, z, rInSaa1StEnv1, rOuSaa1StEnv2);
383 shSaa1StEnv->DefineSection( 4, z, rInSaa1StEnv2, rOuSaa1StEnv2);
385 shSaa1StEnv->DefineSection( 5, z, rInSaa1StEnv3, rOuSaa1StEnv3);
387 z += (zSaa1StEnv[2] - dSt);
388 shSaa1StEnv->DefineSection( 6, z, rInSaa1StEnv3, rOuSaa1StEnv3);
390 shSaa1StEnv->DefineSection( 7, z, rInSaa1StEnv3, rOuSaa1StEnv4);
392 shSaa1StEnv->DefineSection( 8, z, rInSaa1StEnv3, rOuSaa1StEnv4);
394 shSaa1StEnv->DefineSection( 9, z, rInSaa1StEnv4, rOuSaa1StEnv4);
396 shSaa1StEnv->DefineSection(10, z, rInSaa1StEnv5, rOuSaa1StEnv5);
397 TGeoVolume* voSaa1StEnv = new TGeoVolume("YSAA1_SteelEnvelope", shSaa1StEnv, kMedSteel);
403 ///////////////////////////////////
405 // Drawing ALIP2A__0059 //
406 ///////////////////////////////////
409 // Length of first section
410 Float_t dzSaa1WPipeF1 = 0.9;
412 Float_t rOuSaa1WPipeF1 = 24.5/2.;
414 Float_t rInSaa1WPipeF1 = 22.0/2.;
415 // Length of second section
416 Float_t dzSaa1WPipeF11 = 2.1;
418 Float_t rInSaa1WPipeF11 = 18.5/2.;
422 Float_t dzSaa1WPipeC = 111.2;
423 // Inner Radius at the end
424 Float_t rInSaa1WPipeC = 22.0/2.;
426 Float_t rOuSaa1WPipeC = 31.9/2.;
430 Float_t dzSaa1WPipeF2 = 6.0;
432 Float_t rOuSaa1WPipeF2 = 41.56/2.;
435 TGeoPcon* shSaa1WPipe = new TGeoPcon(0., 360., 8);
437 // Flange FA side first section
438 shSaa1WPipe->DefineSection( 0, z, rInSaa1WPipeF1 , rOuSaa1WPipeF1);
440 shSaa1WPipe->DefineSection( 1, z, rInSaa1WPipeF1 , rOuSaa1WPipeF1);
441 // Flange FA side second section
442 shSaa1WPipe->DefineSection( 2, z, rInSaa1WPipeF11, rOuSaa1WPipeF1);
444 shSaa1WPipe->DefineSection( 3, z, rInSaa1WPipeF11, rOuSaa1WPipeF1);
446 shSaa1WPipe->DefineSection( 4, z, rInSaa1WPipeF11, rOuSaa1WPipeC);
448 shSaa1WPipe->DefineSection( 5, z, rInSaa1WPipeC, rOuSaa1WPipeC);
450 shSaa1WPipe->DefineSection( 6, z, rInSaa1WPipeC, rOuSaa1WPipeF2);
452 shSaa1WPipe->DefineSection( 7, z, rInSaa1WPipeC, rOuSaa1WPipeF2);
454 TGeoVolume* voSaa1WPipe = new TGeoVolume("YSAA1_WPipe", shSaa1WPipe, kMedNiW);
456 // Inner region with higher transport cuts
457 TGeoTube* shSaa1WPipeI = new TGeoTube(rInSaa1WPipeC, rOuSaa1WPipeC, dzSaa1WPipeC/2.);
458 TGeoVolume* voSaa1WPipeI = new TGeoVolume("YSAA1_WPipeI", shSaa1WPipeI, kMedNiWsh);
459 voSaa1WPipe->AddNode(voSaa1WPipeI, 1, new TGeoTranslation(0., 0., dzSaa1WPipeF1 + dzSaa1WPipeF11 + dzSaa1WPipeC/2));
462 ///////////////////////////////////
463 // SAA1 Pb Components //
464 // Drawing ALIP2A__0078 //
465 ///////////////////////////////////
468 Float_t tanAlpha = TMath::Tan(1.69 / 2. * kDegRad);
469 Float_t tanBeta = TMath::Tan(3.20 / 2. * kDegRad);
471 // 1st Section 2deg opening cone
473 Float_t dzSaa1PbComp1 = 100.23;
474 // Inner radius at entrance
475 Float_t rInSaa1PbComp1 = 22.0/2.; // It's 21 cm diameter in the drawing. Is this a typo ??!!
476 // Outer radius at entrance
477 Float_t rOuSaa1PbComp1 = 42.0/2.;
479 // 2nd Section: Straight Section
481 Float_t dzSaa1PbComp2 = 236.77;
483 Float_t rInSaa1PbComp2 = rInSaa1PbComp1 + dzSaa1PbComp1 * tanAlpha;
485 Float_t rOuSaa1PbComp2 = 49.0/2.;
487 // 3rd Section: 1.6deg opening cone until bellow
489 Float_t dzSaa1PbComp3 = 175.6;
491 Float_t rInSaa1PbComp3 = rInSaa1PbComp2 + dzSaa1PbComp2 * tanAlpha;
493 Float_t rOuSaa1PbComp3 = 62.8/2.;
495 // 4th Section: Bellow region
496 Float_t dzSaa1PbComp4 = 26.4;
498 Float_t rInSaa1PbComp4 = 37.1/2.;
499 Float_t rInSaa1PbCompB = 43.0/2.;
501 Float_t rOuSaa1PbComp4 = rOuSaa1PbComp3 + dzSaa1PbComp3 * tanBeta;
503 // 5th Section: Flange SAA2 side
505 Float_t dzSaa1PbCompF1 = 4.;
506 Float_t rOuSaa1PbCompF1 = 74.1/2.;
508 Float_t dzSaa1PbCompF2 = 3.;
509 Float_t rOuSaa1PbCompF2 = 66.0/2.;
510 Float_t rOuSaa1PbCompF3 = 58.0/2.;
513 TGeoPcon* shSaa1PbComp = new TGeoPcon(0., 360., 11);
515 // 2 deg opening cone
516 shSaa1PbComp->DefineSection( 0, z, rInSaa1PbComp1, rOuSaa1PbComp1);
518 shSaa1PbComp->DefineSection( 1, z, rInSaa1PbComp2, rOuSaa1PbComp2);
521 shSaa1PbComp->DefineSection( 2, z, rInSaa1PbComp3, rOuSaa1PbComp2);
522 // 1.6 deg opening cone
523 shSaa1PbComp->DefineSection( 3, z, rInSaa1PbComp3, rOuSaa1PbComp3);
525 shSaa1PbComp->DefineSection( 4, z, rInSaa1PbComp4, rOuSaa1PbComp4);
526 // Bellow region until outer flange
527 shSaa1PbComp->DefineSection( 5, z, rInSaa1PbCompB, rOuSaa1PbComp4);
528 z += (dzSaa1PbComp4 - dzSaa1PbCompF1 - dzSaa1PbCompF2);
529 shSaa1PbComp->DefineSection( 6, z, rInSaa1PbCompB, rOuSaa1PbCompF1);
530 shSaa1PbComp->DefineSection( 7, z, rInSaa1PbCompB, rOuSaa1PbCompF2);
533 shSaa1PbComp->DefineSection( 8, z, rInSaa1PbCompB, rOuSaa1PbCompF2);
534 shSaa1PbComp->DefineSection( 9, z, rInSaa1PbCompB, rOuSaa1PbCompF3);
535 // Flange second step
537 shSaa1PbComp->DefineSection( 10, z, rInSaa1PbCompB, rOuSaa1PbCompF3);
539 TGeoVolume* voSaa1PbComp = new TGeoVolume("YSAA1_PbComp", shSaa1PbComp, kMedPb);
541 // Inner region with higher transport cuts
542 TGeoPcon* shSaa1PbCompI = MakeShapeFromTemplate(shSaa1PbComp, 0., -3.);
543 TGeoVolume* voSaa1PbCompI = new TGeoVolume("YSAA1_PbCompI", shSaa1PbCompI, kMedPbSh);
544 voSaa1PbComp->AddNode(voSaa1PbCompI, 1, gGeoIdentity);
546 ///////////////////////////////////
548 // Drawing ALIP2A__0058 //
549 ///////////////////////////////////
550 // Length of the Cone
551 Float_t dzSaa1WCone = 52.9;
552 // Inner and outer radii
553 Float_t rInSaa1WCone1 = 20.4;
554 Float_t rOuSaa1WCone1 = rInSaa1WCone1 + 0.97;
555 Float_t rOuSaa1WCone2 = rInSaa1WCone1 + 2.80;
556 // relative z-position
557 Float_t zSaa1WCone = 9.3;
560 TGeoPcon* shSaa1WCone = new TGeoPcon(0., 360., 2);
562 shSaa1WCone->DefineSection( 0, z, rInSaa1WCone1, rOuSaa1WCone1);
564 shSaa1WCone->DefineSection( 1, z, rInSaa1WCone1, rOuSaa1WCone2);
565 TGeoVolume* voSaa1WCone = new TGeoVolume("YSAA1_WCone", shSaa1WCone, kMedNiW);
567 ///////////////////////////////////
568 // SAA1 Steel-Ring //
569 // Drawing ALIP2A__0040 //
570 ///////////////////////////////////
572 // Length of the ring
573 Float_t dzSaa1StRing = 4.;
574 // Inner and outer radius
575 Float_t rInSaa1String = 33.0;
576 Float_t rOuSaa1String = 41.1;
577 // Relative z-position
578 Float_t zSaa1StRing = 652.2;
579 TGeoPcon* shSaa1StRing = new TGeoPcon(0., 360., 2);
581 shSaa1StRing->DefineSection( 0, z, rInSaa1String, rOuSaa1String);
583 shSaa1StRing->DefineSection( 1, z, rInSaa1String, rOuSaa1String);
584 TGeoVolume* voSaa1StRing = new TGeoVolume("YSAA1_StRing", shSaa1StRing, kMedSteel);
586 ///////////////////////////////////
587 // SAA1 Inner Tube //
588 // Drawing ALIP2A__0082 //
589 ///////////////////////////////////
591 // Length of saa2: 659.2 cm
592 // Length of inner tube: 631.9 cm
593 // Lenth of bellow cavern: 27.3 cm
594 // Radius at entrance 18.5/2, d = 0.3
595 // Radius at exit 37.1/2, d = 0.3
597 Float_t dzSaa1InnerTube = 631.9/2.; // Half length of the tube
598 Float_t rInSaa1InnerTube = 18.2/2.; // Radius at entrance
599 Float_t rOuSaa1InnerTube = 36.8/2.; // Radius at exit
600 Float_t dSaa1InnerTube = 0.2 ; // Thickness
601 TGeoVolume* voSaa1InnerTube = new TGeoVolume("YSAA1_InnerTube",
602 new TGeoCone(dzSaa1InnerTube,
603 rInSaa1InnerTube - dSaa1InnerTube, rInSaa1InnerTube,
604 rOuSaa1InnerTube - dSaa1InnerTube, rOuSaa1InnerTube),
607 ///////////////////////////////////
608 // SAA1 Outer Shape //
609 // Drawing ALIP2A__0107 //
610 ///////////////////////////////////
612 Float_t dzSaa1 = 659.2;
614 TGeoPcon* shSaa1M = new TGeoPcon(0., 360., 20);
615 Float_t kSec = 0.2; // security distance to avoid trivial extrusions
616 Float_t rmin = rInSaa1InnerTube - dSaa1InnerTube - kSec;
617 rmax = rOuSaa1InnerTube - dSaa1InnerTube - kSec;
619 shSaa1M->DefineSection( 0, z, rmin, rOuSaa1WPipeF1);
621 shSaa1M->DefineSection( 1, z, rmin, rOuSaa1WPipeF1);
622 shSaa1M->DefineSection( 2, z, 0., rOuSaa1WPipeF1);
624 shSaa1M->DefineSection( 3, z, 0., rOuSaa1WPipeF1);
625 shSaa1M->DefineSection( 4, z, 0., rOuSaa1StEnv1);
627 shSaa1M->DefineSection( 5, z, 0., rOuSaa1StEnv1);
628 shSaa1M->DefineSection( 6, z, 0., rOuSaa1WCone1);
630 shSaa1M->DefineSection( 7, z, 0., rOuSaa1WCone2);
631 shSaa1M->DefineSection( 8, z, 0., rOuSaa1StEnv1);
632 z = zSaa1StEnv[0] - dSt + zSaa1StEnvS;
633 shSaa1M->DefineSection( 9, z, 0., rOuSaa1StEnv1);
634 shSaa1M->DefineSection(10, z, 0., rOuSaa1StEnv2);
635 z += (zSaa1StEnv[1] + dSt);
636 shSaa1M->DefineSection(11, z, 0., rOuSaa1StEnv3);
637 z += (zSaa1StEnv[2] - dSt);
638 shSaa1M->DefineSection(12, z, 0., rOuSaa1StEnv3);
639 shSaa1M->DefineSection(13, z, 0., rOuSaa1StEnv4);
641 z += (zSaa1StEnv[3] - dSt + dzSaa1PbCompF1 + dzSaa1PbCompF2 - dzSaa1PbComp4);
642 Float_t rmaxSaa1 = shSaa1M->GetRmax(13) + (z - shSaa1M->GetZ(13)) * TMath::Tan(1.6 * kDegRad);
644 shSaa1M->DefineSection(14, z, 0., rmaxSaa1);
645 shSaa1M->DefineSection(15, z, rmax, rmaxSaa1);
647 shSaa1M->DefineSection(16, z, rmax + 0.4, rOuSaa1String);
649 shSaa1M->DefineSection(17, z, rmax + 0.4, rOuSaa1String);
650 shSaa1M->DefineSection(18, z, rmax + 0.4, rOuSaa1PbCompF3);
652 shSaa1M->DefineSection(19, z, rmax + 0.4, rOuSaa1PbCompF3);
655 // Inner 1.69deg line
656 for (Int_t i = 2; i < 15; i++) {
657 Double_t zp = shSaa1M->GetZ(i);
658 Double_t r2 = shSaa1M->GetRmax(i);
659 Double_t r1 = rmin + (zp - 0.9) * TMath::Tan(1.686 / 2. * kDegRad) - kSec;
660 shSaa1M->DefineSection(i, zp, r1, r2);
663 TGeoVolume* voSaa1M = new TGeoVolume("YSAA1M", shSaa1M, kMedAir);
664 voSaa1M->SetVisibility(0);
667 ///////////////////////////////////
669 // Recess Station 2 //
670 // Drawing ALIP2A__0260 //
671 ///////////////////////////////////
672 ///////////////////////////////////
674 // Drawing ALIP2A__0217 //
675 ///////////////////////////////////
676 Float_t saa1Wring1Width = 5.85;
677 TGeoPcon* shSaa1Wring1 = new TGeoPcon(0., 360., 2);
678 shSaa1Wring1->DefineSection(0, 0.00 , 20.31, 23.175);
679 shSaa1Wring1->DefineSection(1, saa1Wring1Width, 20.31, 23.400);
680 TGeoVolume* voSaa1Wring1 = new TGeoVolume("YSAA1_WRING1", shSaa1Wring1, kMedNiW);
682 ///////////////////////////////////
684 // Drawing ALIP2A__0055 //
685 ///////////////////////////////////
686 Float_t saa1Wring2Rinner = 20.31;
687 Float_t saa1Wring2Router = 23.40;
688 Float_t saa1Wring2HWidth = 3.75;
689 Float_t saa1Wring2Cutoffx = 4.9;
690 Float_t saa1Wring2Cutoffy = 4.9;
691 TGeoTubeSeg* shSaa1Wring2a = new TGeoTubeSeg(saa1Wring2Rinner, saa1Wring2Router, saa1Wring2HWidth, 0., 90.);
692 shSaa1Wring2a->SetName("shSaa1Wring2a");
693 TGeoBBox* shSaa1Wring2b = new TGeoBBox(saa1Wring2Router / 2., saa1Wring2Router / 2., saa1Wring2HWidth);
694 shSaa1Wring2b->SetName("shSaa1Wring2b");
695 TGeoTranslation* trSaa1Wring2b
696 = new TGeoTranslation("trSaa1Wring2b", saa1Wring2Router / 2. + saa1Wring2Cutoffx, saa1Wring2Router / 2. + saa1Wring2Cutoffy, 0.);
697 trSaa1Wring2b->RegisterYourself();
698 TGeoCompositeShape* shSaa1Wring2 = new TGeoCompositeShape("shSaa1Wring2", "(shSaa1Wring2a)*(shSaa1Wring2b:trSaa1Wring2b)");
699 TGeoVolume* voSaa1Wring2 = new TGeoVolume("YSAA1_WRING2", shSaa1Wring2, kMedNiW);
701 ///////////////////////////////////
703 // Drawing ALIP2A__0216 //
704 ///////////////////////////////////
706 Float_t saa1Wring3Rinner = 20.31;
707 Float_t saa1Wring3Router = 23.40;
708 Float_t saa1Wring3HWidth = 3.75;
709 Float_t saa1Wring3Cutoffx = 4.80;
710 Float_t saa1Wring3Cutoffy = 4.80;
711 TGeoTubeSeg* shSaa1Wring3a = new TGeoTubeSeg(saa1Wring3Rinner, saa1Wring3Router, saa1Wring3HWidth, 0., 90.);
712 shSaa1Wring3a->SetName("shSaa1Wring3a");
713 TGeoBBox* shSaa1Wring3b = new TGeoBBox(saa1Wring3Router / 2., saa1Wring3Router / 2., saa1Wring3HWidth);
714 shSaa1Wring3b->SetName("shSaa1Wring3b");
715 TGeoTranslation* trSaa1Wring3b
716 = new TGeoTranslation("trSaa1Wring3b", saa1Wring3Router / 2. + saa1Wring3Cutoffx, saa1Wring3Router / 2. + saa1Wring3Cutoffy, 0.);
717 trSaa1Wring3b->RegisterYourself();
718 TGeoCompositeShape* shSaa1Wring3 = new TGeoCompositeShape("shSaa1Wring3", "(shSaa1Wring3a)*(shSaa1Wring3b:trSaa1Wring3b)");
719 TGeoVolume* voSaa1Wring3 = new TGeoVolume("YSAA1_WRING3", shSaa1Wring3, kMedNiW);
721 ///////////////////////////////////
723 // Drawing ALIP2A__0215 //
724 ///////////////////////////////////
725 Float_t saa1Wring4Width = 5.85;
726 TGeoPcon* shSaa1Wring4 = new TGeoPcon(0., 360., 5);
727 shSaa1Wring4->DefineSection(0, 0.00, 20.31, 23.40);
728 shSaa1Wring4->DefineSection(1, 1.00, 20.31, 23.40);
729 shSaa1Wring4->DefineSection(2, 1.00, 20.31, 24.50);
730 shSaa1Wring4->DefineSection(3, 4.85, 20.31, 24.80);
731 shSaa1Wring4->DefineSection(4, 5.85, 24.10, 24.80);
732 TGeoVolume* voSaa1Wring4 = new TGeoVolume("YSAA1_WRING4", shSaa1Wring4, kMedNiW);
734 ///////////////////////////////////
736 // Drawing ALIP2A__0218 //
737 ///////////////////////////////////
738 Float_t saa1Wring5Rinner = 20.31;
739 Float_t saa1Wring5Router = 23.40;
740 Float_t saa1Wring5HWidth = 0.85;
741 TGeoVolume* voSaa1Wring5 = new TGeoVolume("YSAA1_WRING5",
742 new TGeoTube(saa1Wring5Rinner, saa1Wring5Router, saa1Wring5HWidth), kMedNiW);
744 // Position the rings in the assembly
746 TGeoVolumeAssembly* asSaa1ExtraShield = new TGeoVolumeAssembly("YSAA1ExtraShield");
747 // Distance between rings
748 Float_t saa1DWrings = 2.3;
750 dz = - (saa1Wring1Width + 6. * saa1Wring2HWidth + 2. * saa1Wring3HWidth + saa1Wring4Width + 2. * saa1Wring5HWidth + 2. * saa1DWrings) / 2.;
751 asSaa1ExtraShield->AddNode(voSaa1Wring1, 1, new TGeoTranslation(0., 0., dz));
752 dz += saa1Wring1Width;
753 dz += saa1Wring2HWidth;
754 asSaa1ExtraShield->AddNode(voSaa1Wring2, 1, new TGeoCombiTrans(0., 0., dz, rot000));
755 asSaa1ExtraShield->AddNode(voSaa1Wring2, 2, new TGeoCombiTrans(0., 0., dz, rot180));
756 dz += saa1Wring2HWidth;
758 dz += saa1Wring2HWidth;
759 asSaa1ExtraShield->AddNode(voSaa1Wring2, 3, new TGeoCombiTrans(0., 0., dz, rot090));
760 asSaa1ExtraShield->AddNode(voSaa1Wring2, 4, new TGeoCombiTrans(0., 0., dz, rot270));
761 dz += saa1Wring2HWidth;
762 dz += saa1Wring5HWidth;
763 asSaa1ExtraShield->AddNode(voSaa1Wring5, 1, new TGeoTranslation(0., 0., dz));
764 dz += saa1Wring5HWidth;
765 dz += saa1Wring2HWidth;
766 asSaa1ExtraShield->AddNode(voSaa1Wring2, 5, new TGeoCombiTrans(0., 0., dz, rot000));
767 asSaa1ExtraShield->AddNode(voSaa1Wring2, 6, new TGeoCombiTrans(0., 0., dz, rot180));
768 dz += saa1Wring2HWidth;
770 dz += saa1Wring3HWidth;
771 asSaa1ExtraShield->AddNode(voSaa1Wring3, 1, new TGeoCombiTrans(0., 0., dz, rot090));
772 asSaa1ExtraShield->AddNode(voSaa1Wring3, 2, new TGeoCombiTrans(0., 0., dz, rot270));
773 dz += saa1Wring3HWidth;
774 asSaa1ExtraShield->AddNode(voSaa1Wring4, 1, new TGeoTranslation(0., 0., dz));
775 dz += saa1Wring4Width;
776 const Float_t saa1ExtraShieldL = 48;
779 voSaa1M->AddNode(voSaa1StEnv, 1, gGeoIdentity);
780 voSaa1M->AddNode(voSaa1WPipe, 1, gGeoIdentity);
781 voSaa1M->AddNode(voSaa1PbComp, 1, gGeoIdentity);
782 voSaa1M->AddNode(voSaa1WCone, 1, gGeoIdentity);
783 voSaa1M->AddNode(voSaa1StRing, 1, gGeoIdentity);
784 voSaa1M->AddNode(voSaa1InnerTube, 1, new TGeoTranslation(0., 0., dzSaa1InnerTube + 0.9));
785 TGeoVolumeAssembly* voSaa1 = new TGeoVolumeAssembly("YSAA1");
786 voSaa1->AddNode(voSaa1M, 1, gGeoIdentity);
788 ///////////////////////////////////////
789 // SAA1/SAA2 Pb Joint //
790 // Drawing ALIP2A__0081 //
791 ///////////////////////////////////////
794 Float_t rOuSaa1Saa2 = 70.0/2.;
796 Float_t dzSaa1Saa2F1 = 3.;
797 Float_t rInSaa1Saa2F1 = 58.5/2.;
798 // 1st Central Section
799 Float_t dzSaa1Saa2C1 = 19.3;
800 Float_t rInSaa1Saa2C1 = 42.8/2.;
802 Float_t dzSaa1Saa2T = 3.3;
803 // 1st Central Section
804 Float_t dzSaa1Saa2C2 = 6.2;
805 Float_t rInSaa1Saa2C2 = 36.2/2.;
807 Float_t dzSaa1Saa2F2 = 3.1;
808 Float_t rInSaa1Saa2F2 = 54.1/2.;
810 Float_t dzSaa1Saa2 = 34.9;
813 TGeoPcon* shSaa1Saa2Pb = new TGeoPcon(0., 360., 8);
816 shSaa1Saa2Pb->DefineSection( 0, z, rInSaa1Saa2F1, rOuSaa1Saa2);
818 shSaa1Saa2Pb->DefineSection( 1, z, rInSaa1Saa2F1, rOuSaa1Saa2);
819 shSaa1Saa2Pb->DefineSection( 2, z, rInSaa1Saa2C1, rOuSaa1Saa2);
822 shSaa1Saa2Pb->DefineSection( 3, z, rInSaa1Saa2C1, rOuSaa1Saa2);
825 shSaa1Saa2Pb->DefineSection( 4, z, rInSaa1Saa2C2, rOuSaa1Saa2);
827 shSaa1Saa2Pb->DefineSection( 5, z, rInSaa1Saa2C2, rOuSaa1Saa2);
828 shSaa1Saa2Pb->DefineSection( 6, z, rInSaa1Saa2F2, rOuSaa1Saa2);
830 shSaa1Saa2Pb->DefineSection( 7, z, rInSaa1Saa2F2, rOuSaa1Saa2);
831 TGeoVolume* voSaa1Saa2Pb = new TGeoVolume("YSAA1SAA2Pb", shSaa1Saa2Pb, kMedPb);
833 // Mother volume and outer steel envelope
834 Float_t rOuSaa1Saa2Steel = 36.9;
836 TGeoPcon* shSaa1Saa2 = MakeShapeFromTemplate(shSaa1Saa2Pb, 0., rOuSaa1Saa2Steel-rOuSaa1Saa2);
837 TGeoVolume* voSaa1Saa2 = new TGeoVolume("YSAA1SAA2", shSaa1Saa2, kMedSteel);
838 voSaa1Saa2->AddNode(voSaa1Saa2Pb, 1, gGeoIdentity);
840 // Inner region with higher transport cuts
842 TGeoPcon* shSaa1Saa2I = MakeShapeFromTemplate(shSaa1Saa2Pb, 0., -3.);
843 TGeoVolume* voSaa1Saa2I = new TGeoVolume("YSAA1_SAA2I", shSaa1Saa2I, kMedPbSh);
844 voSaa1Saa2Pb->AddNode(voSaa1Saa2I, 1, gGeoIdentity);
848 ///////////////////////////////////////
850 ///////////////////////////////////////
853 ///////////////////////////////////
854 // SAA2 Steel Envelope //
855 // Drawing ALIP2A__0041 //
856 ///////////////////////////////////
857 dSt = 4.; // Thickness of steel envelope
858 // Length of the first section
859 Float_t dzSaa2StEnv1 = 163.15;
860 Float_t rInSaa2StEnv1 = 65.8/2.;
861 // Length of the second section
862 Float_t dzSaa2StEnv2 = 340.35 - 4.;
863 Float_t rInSaa2StEnv2 = 87.2/2.;
864 // Rel. starting position
865 Float_t zSaa2StEnv = 3.;
867 TGeoPcon* shSaa2StEnv = new TGeoPcon(0., 360., 6);
870 shSaa2StEnv->DefineSection( 0, z, rInSaa2StEnv1, rInSaa2StEnv1 + dSt);
872 shSaa2StEnv->DefineSection( 1, z, rInSaa2StEnv1, rInSaa2StEnv1 + dSt);
874 shSaa2StEnv->DefineSection( 2, z, rInSaa2StEnv1, rInSaa2StEnv2 + dSt);
876 shSaa2StEnv->DefineSection( 3, z, rInSaa2StEnv1, rInSaa2StEnv2 + dSt);
878 shSaa2StEnv->DefineSection( 4, z, rInSaa2StEnv2, rInSaa2StEnv2 + dSt);
880 shSaa2StEnv->DefineSection( 5, z, rInSaa2StEnv2, rInSaa2StEnv2 + dSt);
882 TGeoVolume* voSaa2StEnv = new TGeoVolume("YSAA2_SteelEnvelope", shSaa2StEnv, kMedSteel);
885 ///////////////////////////////////
887 // Drawing ALIP2A__0080 //
888 // Drawing ALIP2A__0111 //
889 ///////////////////////////////////
891 // Rel. position in z
892 Float_t zSaa2PbRing = 35.25;
894 Float_t dzSaa2PbRing = 65.90;
896 Float_t rInSaa2PbRing = 37.00;
897 // Outer radius at front
898 Float_t rOuSaa2PbRingF = 42.74;
899 // Outer Rradius at rear
900 Float_t rOuSaa2PbRingR = 44.58;
902 TGeoPcon* shSaa2PbRing = new TGeoPcon(0., 360., 2);
904 shSaa2PbRing->DefineSection(0, z, rInSaa2PbRing, rOuSaa2PbRingF);
906 shSaa2PbRing->DefineSection(1, z, rInSaa2PbRing, rOuSaa2PbRingR);
908 TGeoVolume* voSaa2PbRing = new TGeoVolume("YSAA2_PbRing", shSaa2PbRing, kMedPb);
911 ///////////////////////////////////
912 // SAA2 Pb Components //
913 // Drawing ALIP2A__0079 //
914 ///////////////////////////////////
915 tanAlpha = TMath::Tan(1.89 / 2. * kDegRad);
916 TGeoPcon* shSaa2PbComp = new TGeoPcon(0., 360., 16);
918 Float_t dzSaa2PbComp = 512.;
919 // Length of 1st bellow recess
920 Float_t dzSaa2PbCompB1 = 24.;
921 // Length of 2nd bellow recess
922 Float_t dzSaa2PbCompB2 = 27.;
923 // Flange on the SAA1 side Detail A
925 Float_t dzSaa2PbCompA1 = 1.5;
926 Float_t rInSaa2PbCompA1 = 43.0/2.;
927 Float_t rOuSaa2PbCompA1 = 53.0/2.;
929 Float_t dzSaa2PbCompA2 = 1.5;
930 Float_t rInSaa2PbCompA2 = 36.8/2.;
931 Float_t rOuSaa2PbCompA2 = rOuSaa2PbCompA1;
933 Float_t dzSaa2PbCompA3 = 21.0;
934 Float_t rInSaa2PbCompA3 = rInSaa2PbCompA2;
935 Float_t rOuSaa2PbCompA3 = 65.2/2.;
937 // 1st Section (outer straight, inner 1.89/2. deg opening cone)
939 Float_t dzSaa2PbComp1 = 146.15;
940 // Inner radius at the end
941 Float_t rInSaa2PbComp1 = rInSaa2PbCompA3 + dzSaa2PbComp1 * tanAlpha;
943 Float_t rOuSaa2PbComp1 = rOuSaa2PbCompA3;
945 // 2nd Section (outer straight, inner 1.89/2. deg opening cone)
947 Float_t dzSaa2PbComp2 = (dzSaa2PbComp - dzSaa2PbComp1 - dzSaa2PbCompB1 - dzSaa2PbCompB2);
948 // Inner radius at the end
949 Float_t rInSaa2PbComp2 = rInSaa2PbComp1 + dzSaa2PbComp2 * tanAlpha;
951 Float_t rOuSaa2PbComp2 = 86.6/2.;
953 // Flange on the SAA3 side (Detail E)
956 // Length dzSaa2PbCompB2 - 8.8 = 27 - 8.8 = 18.2
957 Float_t dzSaa2PbCompE1 = 18.2;
958 Float_t rInSaa2PbCompE1 = 52.0/2.;
959 Float_t rOuSaa2PbCompE1 = 86.6/2.;
961 Float_t dzSaa2PbCompE2 = 2.7;
963 Float_t dzSaa2PbCompE3 = 0.6;
964 Float_t rInSaa2PbCompE3 = 52.0/2.+ dzSaa2PbCompE2;
965 Float_t rOuSaa2PbCompE3 = 83.0/2.;
967 Float_t dzSaa2PbCompE4 = 4.0;
968 Float_t rOuSaa2PbCompE4 = 61.6/2.;
970 Float_t dzSaa2PbCompE5 = 1.5;
974 // Flange on SAA1 side (Detail A)
977 shSaa2PbComp->DefineSection( 0, z, rInSaa2PbCompA1, rOuSaa2PbCompA1);
979 shSaa2PbComp->DefineSection( 1, z, rInSaa2PbCompA1, rOuSaa2PbCompA1);
980 shSaa2PbComp->DefineSection( 2, z, rInSaa2PbCompA2, rOuSaa2PbCompA2);
983 shSaa2PbComp->DefineSection( 3, z, rInSaa2PbCompA2, rOuSaa2PbCompA2);
984 shSaa2PbComp->DefineSection( 4, z, rInSaa2PbCompA3, rOuSaa2PbCompA3);
987 shSaa2PbComp->DefineSection( 5, z, rInSaa2PbCompA3, rOuSaa2PbCompA3);
991 shSaa2PbComp->DefineSection( 6, z, rInSaa2PbComp1, rOuSaa2PbComp1);
992 shSaa2PbComp->DefineSection( 7, z, rInSaa2PbComp1, rOuSaa2PbComp2);
996 shSaa2PbComp->DefineSection( 8, z, rInSaa2PbComp2, rOuSaa2PbComp2);
998 // Flange SAA3 side (Detail E)
1000 shSaa2PbComp->DefineSection( 9, z, rInSaa2PbCompE1, rOuSaa2PbCompE1);
1001 // 45 deg transition
1002 z += dzSaa2PbCompE2;
1003 shSaa2PbComp->DefineSection( 10, z, rInSaa2PbCompE3, rOuSaa2PbCompE1);
1005 z += dzSaa2PbCompE3;
1006 shSaa2PbComp->DefineSection( 11, z, rInSaa2PbCompE3, rOuSaa2PbCompE1);
1007 shSaa2PbComp->DefineSection( 12, z, rInSaa2PbCompE3, rOuSaa2PbCompE3);
1009 z += dzSaa2PbCompE4;
1010 shSaa2PbComp->DefineSection( 13, z, rInSaa2PbCompE3, rOuSaa2PbCompE3);
1011 shSaa2PbComp->DefineSection( 14, z, rInSaa2PbCompE3, rOuSaa2PbCompE4);
1013 z += dzSaa2PbCompE5;
1014 shSaa2PbComp->DefineSection( 15, z, rInSaa2PbCompE3, rOuSaa2PbCompE4);
1016 TGeoVolume* voSaa2PbComp = new TGeoVolume("YSAA2_PbComp", shSaa2PbComp, kMedPbSh);
1019 ///////////////////////////////////
1020 // SAA2 Inner Tube //
1021 // Drawing ALIP2A__0083 //
1022 ///////////////////////////////////
1026 // Length of saa2: 512.0 cm
1027 // Length of inner tube: 501.7 cm
1028 // Lenth of bellow recess: 10.3 cm ( 1.5 + 8.8)
1029 // Radius at entrance 36.8/2, d = 0.1
1030 // Radius at exit 52.0/2, d = 0.1
1032 const Float_t kSaa2InnerTubeL = 501.7; // Length of the tube
1033 const Float_t kSaa2InnerTubeRmin = 36.6/2.; // Radius at entrance
1034 const Float_t kSaa2InnerTubeRmax = 51.8/2.; // Radius at exit
1035 const Float_t kSaa2InnerTubeD = 0.2 ; // Thickness
1036 TGeoPcon* shSaa2InnerTube = new TGeoPcon(0., 360., 4);
1038 shSaa2InnerTube->DefineSection( 0, z, kSaa2InnerTubeRmin - kSaa2InnerTubeD, kSaa2InnerTubeRmin);
1039 z += dzSaa2PbCompA2 + dzSaa2PbCompA3;
1040 shSaa2InnerTube->DefineSection( 1, z, kSaa2InnerTubeRmin - kSaa2InnerTubeD, kSaa2InnerTubeRmin);
1041 z = kSaa2InnerTubeL - dzSaa2PbCompE1;
1042 shSaa2InnerTube->DefineSection( 2, z, kSaa2InnerTubeRmax - kSaa2InnerTubeD, kSaa2InnerTubeRmax);
1043 z = kSaa2InnerTubeL;
1044 shSaa2InnerTube->DefineSection( 3, z, kSaa2InnerTubeRmax - kSaa2InnerTubeD, kSaa2InnerTubeRmax);
1045 TGeoVolume* voSaa2InnerTube = new TGeoVolume("YSAA2_InnerTube", shSaa2InnerTube, kMedSteelSh);
1047 ///////////////////////////////////
1048 // SAA2 Steel Ring //
1049 // Drawing ALIP2A__0042 //
1050 ///////////////////////////////////
1052 Float_t dzSaa2SteelRing = 2.;
1053 TGeoTube* shSaa2SteelRing = new TGeoTube(41.6, 47.6, dzSaa2SteelRing);
1054 TGeoVolume* voSaa2SteelRing = new TGeoVolume("YSAA2_SteelRing", shSaa2SteelRing, kMedSteel);
1056 ///////////////////////////////////
1057 // SAA2 Outer Shape //
1058 // Drawing ALIP2A__0108 //
1059 ///////////////////////////////////
1061 TGeoPcon* shSaa2 = new TGeoPcon(0., 360., 16);
1062 kSec = 0.02; // security distance to avoid trivial extrusions
1063 rmin = kSaa2InnerTubeRmin - kSaa2InnerTubeD - kSec;
1064 rmax = kSaa2InnerTubeRmax - kSaa2InnerTubeD - kSec;
1067 shSaa2->DefineSection( 0, z, rmin , rOuSaa2PbCompA1);
1068 z += dzSaa2PbCompA1 + dzSaa2PbCompA2;
1069 shSaa2->DefineSection( 1, z, rmin , rOuSaa2PbCompA1);
1070 shSaa2->DefineSection( 2, z, rmin , rInSaa2StEnv1 + dSt);
1071 z += dzSaa2PbCompA3;
1072 shSaa2->DefineSection( 3, z, rmin , rInSaa2StEnv1 + dSt);
1074 shSaa2->DefineSection( 4, z, 0. , rInSaa2StEnv1 + dSt);
1075 shSaa2->DefineSection( 5, z, 0. , rOuSaa2PbRingF);
1077 shSaa2->DefineSection( 6, z, 0. , rOuSaa2PbRingR);
1078 shSaa2->DefineSection( 7, z, 0. , rInSaa2StEnv1 + dSt);
1079 z = dzSaa2PbCompA1 + dzSaa2PbCompA2 + dzSaa2StEnv1;
1080 shSaa2->DefineSection( 8, z, 0. , rInSaa2StEnv1 + dSt);
1081 shSaa2->DefineSection( 9, z, 0. , rInSaa2StEnv2 + dSt);
1082 z = dzSaa2PbComp - dzSaa2PbCompB2;
1083 shSaa2->DefineSection(10, z, rmax , rInSaa2StEnv2 + dSt);
1084 z += dzSaa2PbCompE1;
1085 shSaa2->DefineSection(11, z, rmax , rInSaa2StEnv2 + dSt);
1086 z += dzSaa2PbCompE2;
1087 shSaa2->DefineSection(12, z, rInSaa2PbCompE3, rInSaa2StEnv2 + dSt);
1088 z += (dzSaa2PbCompE3 + dzSaa2PbCompE4);
1089 shSaa2->DefineSection(13, z, rInSaa2PbCompE3, rInSaa2StEnv2 + dSt);
1090 shSaa2->DefineSection(14, z, rInSaa2PbCompE3, rOuSaa2PbCompE4);
1091 z += dzSaa2PbCompE5;
1092 shSaa2->DefineSection(15, z, rInSaa2PbCompE3, rOuSaa2PbCompE4);
1094 TGeoVolume* voSaa2 = new TGeoVolume("YSAA2", shSaa2, kMedAir);
1095 voSaa2->SetVisibility(0);
1096 // Inner 1.89/2 deg line
1097 Double_t zref = dzSaa2PbCompA1 + dzSaa2PbCompA2 + dzSaa2PbCompA3;
1098 for (Int_t i = 4; i < 10; i++) {
1099 Double_t zp = shSaa2->GetZ(i);
1100 Double_t r2 = shSaa2->GetRmax(i);
1101 Double_t r1 = rmin + (zp - zref) * TMath::Tan(1.89 / 2. * kDegRad) - kSec;
1102 shSaa2->DefineSection(i, zp, r1, r2);
1107 voSaa2->AddNode(voSaa2StEnv, 1, gGeoIdentity);
1108 voSaa2->AddNode(voSaa2PbRing, 1, gGeoIdentity);
1109 voSaa2->AddNode(voSaa2PbComp, 1, gGeoIdentity);
1110 voSaa2->AddNode(voSaa2InnerTube, 1, new TGeoTranslation(0., 0., dzSaa2PbCompA1));
1111 z = (dzSaa2PbComp - dzSaa2PbCompE4 - dzSaa2PbCompE5) + dzSaa2SteelRing;
1112 voSaa2->AddNode(voSaa2SteelRing, 1, new TGeoTranslation(0., 0., z));
1115 ///////////////////////////////////////
1117 ///////////////////////////////////////
1120 // This is a study performed by S. Maridor
1121 // The SAA3 has not yet been designed !!!!!!!!
1123 ///////////////////////////////////
1124 // SAA3 Outer Shape //
1125 // Drawing ALIP2A__0288 //
1126 ///////////////////////////////////
1127 TGeoVolumeAssembly* voSaa3 = new TGeoVolumeAssembly("YSAA3");
1128 ///////////////////////////////////
1129 // SAA3 Concrete cone //
1130 // Drawing ALIP2A__0284 //
1131 ///////////////////////////////////
1133 TGeoBBox* shSaa3CCBlockO = new TGeoBBox(80./2., 80./2., 100./2.);
1134 shSaa3CCBlockO->SetName("Saa3CCBlockO");
1136 TGeoPcon* shSaa3InnerRegion = new TGeoPcon(0., 360., 4);
1137 shSaa3InnerRegion->DefineSection( 0, -60.0, 0., 27.1);
1138 shSaa3InnerRegion->DefineSection( 1, -23.0, 0., 27.1);
1139 shSaa3InnerRegion->DefineSection( 2, 29.1, 0., 12.3);
1140 shSaa3InnerRegion->DefineSection( 3, 60.0, 0., 12.3);
1141 shSaa3InnerRegion->SetName("Saa3InnerRegion");
1143 TGeoCompositeShape* shSaa3CCBlock = new TGeoCompositeShape("Saa3CCBlock", "Saa3CCBlockO-Saa3InnerRegion");
1144 TGeoVolume* voSaa3CCBlock = new TGeoVolume("YSAA3CCBlock", shSaa3CCBlock, kMedConcSh);
1147 voSaa3->AddNode(voSaa3CCBlock, 1, gGeoIdentity);
1149 // Plate 1: 240 cm x 80 cm x 100 cm (x 2)
1150 TGeoVolume* voSaa3SteelPlate1 = new TGeoVolume("YSAA3SteelPlate1",
1151 new TGeoBBox(240./2., 80./2., 100./2.),
1153 TGeoVolume* voSaa3SteelPlate11 = new TGeoVolume("YSAA3SteelPlate11",
1154 new TGeoBBox(240./2., 80./2., 10./2.),
1156 voSaa3SteelPlate1->AddNode(voSaa3SteelPlate11, 1, new TGeoTranslation(0., 0., -45.));
1157 voSaa3->AddNode(voSaa3SteelPlate1, 1, new TGeoTranslation(0., +80., 0.));
1158 voSaa3->AddNode(voSaa3SteelPlate1, 2, new TGeoTranslation(0., -80., 0.));
1161 // Plate 2: 80 cm x 80 cm x 100 cm (x 2)
1162 TGeoVolume* voSaa3SteelPlate2 = new TGeoVolume("YSAA3SteelPlate2",
1163 new TGeoBBox( 80./2., 80./2., 100./2.),
1165 TGeoVolume* voSaa3SteelPlate21 = new TGeoVolume("YSAA3SteelPlate21",
1166 new TGeoBBox( 80./2., 80./2., 10./2.),
1168 voSaa3SteelPlate2->AddNode(voSaa3SteelPlate21, 1, new TGeoTranslation(0., 0., -45.));
1170 voSaa3->AddNode(voSaa3SteelPlate2, 1, new TGeoTranslation(+80, 0., 0.));
1171 voSaa3->AddNode(voSaa3SteelPlate2, 2, new TGeoTranslation(-80, 0., 0.));
1174 ///////////////////////////////////
1176 // Drawing ALIP2A__0105 //
1177 ///////////////////////////////////
1179 Float_t dzMuonFilter = 60.;
1181 TGeoBBox* shMuonFilterO = new TGeoBBox(550./2., 620./2., dzMuonFilter);
1182 shMuonFilterO->SetName("FilterO");
1183 TGeoCombiTrans* trFilter = new TGeoCombiTrans("trFilter", 0., -dzMuonFilter * TMath::Tan(alhc * kDegrad), 0., rotlhc);
1184 trFilter->RegisterYourself();
1185 TGeoTube* shMuonFilterI = new TGeoTube(0., 48.8, dzMuonFilter + 20.);
1186 shMuonFilterI->SetName("FilterI");
1187 TGeoCompositeShape* shMuonFilter = new TGeoCompositeShape("MuonFilter", "FilterO-FilterI:trFilter");
1189 // !!!!! Needs to be inclined
1190 TGeoVolume* voMuonFilter = new TGeoVolume("YMuonFilter", shMuonFilter, kMedCastiron);
1192 // Inner part with higher transport cuts
1193 Float_t dzMuonFilterH = 50.;
1194 TGeoBBox* shMuonFilterOH = new TGeoBBox(550./2., 620./2., dzMuonFilterH);
1195 shMuonFilterOH->SetName("FilterOH");
1196 TGeoTube* shMuonFilterIH = new TGeoTube(0., 50., dzMuonFilterH + 5.);
1197 shMuonFilterIH->SetName("FilterIH");
1198 TGeoCompositeShape* shMuonFilterH = new TGeoCompositeShape("MuonFilterH", "FilterOH-FilterIH:trFilter");
1199 TGeoVolume* voMuonFilterH = new TGeoVolume("YMuonFilterH", shMuonFilterH, kMedCastironSh);
1200 voMuonFilter->AddNode(voMuonFilterH, 1, gGeoIdentity);
1203 TGeoVolumeAssembly* voSaa = new TGeoVolumeAssembly("YSAA");
1209 // Starting position of the FA Flange/Tail
1210 Float_t ziFaWTail = 499.0;
1211 // End of the FA Flange/Tail
1212 Float_t zoFaWTail = ziFaWTail + dzFaWTail;
1213 // Starting position of the FA/SAA1 Joint (2.8 cm overlap with tail)
1214 Float_t ozFaSaa1 = 2.8;
1215 Float_t ziFaSaa1 = zoFaWTail - ozFaSaa1;
1216 // End of the FA/SAA1 Joint
1217 Float_t zoFaSaa1 = ziFaSaa1 + dzFaSaa1;
1218 // Starting position of SAA1 (2.0 cm overlap with joint)
1219 Float_t ozSaa1 = 2.;
1220 Float_t ziSaa1 = zoFaSaa1 - ozSaa1;
1222 Float_t zoSaa1 = ziSaa1 + dzSaa1;
1223 // Starting position of SAA1/SAA2 Joint (1.95 cm overlap with SAA1)
1224 Float_t ziSaa1Saa2 = zoSaa1 - 1.95;
1225 // End of SAA1/SAA2 Joint
1226 Float_t zoSaa1Saa2 = ziSaa1Saa2 + dzSaa1Saa2;
1227 // Starting position of SAA2 (3.1 cm overlap with the joint)
1228 Float_t ziSaa2 = zoSaa1Saa2 - 3.1;
1230 Float_t zoSaa2 = ziSaa2 + dzSaa2PbComp;
1232 Float_t zcSaa3 = zoSaa2 + 50.;
1233 // Position of the Muon Filter
1234 Float_t zcFilter = 1465.9 + dzMuonFilter;
1236 voSaa->AddNode(voFaWTail, 1, new TGeoTranslation(0., 0., ziFaWTail));
1237 voSaa->AddNode(voFaSaa1, 1, new TGeoTranslation(0., 0., ziFaSaa1));
1238 voSaa->AddNode(voSaa1 , 1, new TGeoTranslation(0., 0., ziSaa1));
1239 voSaa->AddNode(voSaa1Saa2, 1, new TGeoTranslation(0., 0., ziSaa1Saa2 - 0.1));
1240 voSaa->AddNode(voSaa2 , 1, new TGeoTranslation(0., 0., ziSaa2));
1241 voSaa->AddNode(voSaa3, 1, new TGeoTranslation(0., 0., zcSaa3));
1244 TGeoRotation* rotxz = new TGeoRotation("rotxz", 90., 0., 90., 90., 180., 0.);
1245 top->AddNode(voSaa, 1, new TGeoCombiTrans(0., 0., 0., rotxz));
1247 // Mother volume for muon stations 1+2 and shielding material placed between the quadrants
1249 // Position of the dipole
1250 Float_t ziDipole = 741.;
1252 TGeoPcon* shYOUT1 = new TGeoPcon(0., 360., 24);
1253 Float_t eps = 1.e-2;
1255 for (Int_t iz = 1; iz < 9; iz++) {
1256 z = shFaWTail->GetZ(iz+1);
1257 if (iz == 8) z -= ozFaSaa1;
1258 shYOUT1->DefineSection(iz-1, z + ziFaWTail, shFaWTail->GetRmax(iz+1) + eps, 150.);
1261 z = shYOUT1->GetZ(7);
1263 for (Int_t iz = 9; iz < 17; iz++)
1264 shYOUT1->DefineSection(iz-1, z + shFaSaa1->GetZ(iz-9), shFaSaa1->GetRmax(iz-9) + eps, 150.);
1266 z = shYOUT1->GetZ(15) - ozSaa1;
1268 for (Int_t iz = 17; iz < 24; iz++)
1269 shYOUT1->DefineSection(iz-1, z + shSaa1M->GetZ(iz-13), shSaa1M->GetRmax(iz-13) + eps, 150.);
1270 // Distance between dipole and start of SAA1 2deg opening cone
1271 dz = ziDipole - (zSaa1StEnv[0] - dSt + zSaa1StEnvS + ziSaa1);
1272 rOut = rOuSaa1StEnv2 + dz * TMath::Tan(2. * kDegRad);
1274 shYOUT1->DefineSection(23, ziDipole, rOut + eps, 150.);
1276 InvertPcon(shYOUT1);
1277 TGeoVolume* voYOUT1 = new TGeoVolume("YOUT1", shYOUT1, kMedAirMu);
1278 voYOUT1->SetVisibility(0);
1280 voYOUT1->AddNode(asSaa1ExtraShield, 1, new TGeoCombiTrans(0., 0., - (100.7 + 62.2 + saa1ExtraShieldL / 2. + ziFaWTail), rotxz));
1281 voYOUT1->AddNode(asFaExtraShield, 1, new TGeoCombiTrans(0., 0., - (16.41 - 1.46 + kFaWring2HWidth + ziFaWTail), rotxz));
1282 top->AddNode(voYOUT1, 1, gGeoIdentity);
1284 // Mother volume for muon stations 4+5 and trigger stations.
1286 Float_t zoDipole = 1249.;
1288 TGeoPcon* shYOUT21 = new TGeoPcon(0., 360., 14);
1290 shYOUT21->DefineSection(0, z, rOuSaa1String, 375.);
1291 // Start of SAA1-SAA2
1293 shYOUT21->DefineSection(1, z, rOuSaa1String, 375.);
1294 shYOUT21->DefineSection(2, z, rOuSaa1Saa2Steel, 375.);
1297 shYOUT21->DefineSection(3, z, rOuSaa1Saa2Steel, 375.);
1299 shYOUT21->DefineSection( 4, z, rInSaa2StEnv1 + dSt, 375.);
1300 z = ziSaa2 + zSaa2PbRing;
1301 shYOUT21->DefineSection( 5, z, rInSaa2StEnv1 + dSt, 375.);
1303 shYOUT21->DefineSection( 6, z, rOuSaa2PbRingF, 375.);
1304 rmin = rOuSaa2PbRingF + (1380. - z) * TMath::Tan(1.6 * kDegRad);
1305 shYOUT21->DefineSection( 7, 1380., rmin, 375.);
1306 shYOUT21->DefineSection( 8, 1380., rmin, 375.);
1307 z = ziSaa2 + zSaa2PbRing + dzSaa2PbRing;
1308 shYOUT21->DefineSection( 9, z, rOuSaa2PbRingR, 375.);
1309 // Straight Sections
1310 shYOUT21->DefineSection(10, z, rInSaa2StEnv1 + dSt, 460.);
1311 z = ziSaa2 + dzSaa2StEnv1;
1312 shYOUT21->DefineSection(11, z, rInSaa2StEnv1 + dSt, 460.);
1313 shYOUT21->DefineSection(12, z, rInSaa2StEnv2 + dSt, 460.);
1315 shYOUT21->DefineSection(13, z, rInSaa2StEnv2 + dSt, 460.);
1317 InvertPcon(shYOUT21);
1318 shYOUT21->SetName("shYOUT21");
1320 TGeoBBox* shYOUT22 = new TGeoBBox(460. , 200., 65. - 1.5);
1321 shYOUT22->SetName("shYOUT22");
1323 TGeoTranslation* tYOUT22 = new TGeoTranslation(0., -310. - 200., -zcFilter);
1324 tYOUT22->SetName("tYOUT22");
1325 tYOUT22->RegisterYourself();
1328 TGeoCompositeShape* shYOUT2 = new TGeoCompositeShape("shYOUT2", "shYOUT21-shYOUT22:tYOUT22");
1330 TGeoVolume* voYOUT2 = new TGeoVolume("YOUT2", shYOUT2, kMedAirMu);
1331 voYOUT2->SetVisibility(1);
1332 voYOUT2->AddNode(voMuonFilter, 1, new TGeoCombiTrans(0., dzMuonFilter * TMath::Tan(alhc * kDegrad), -zcFilter, rotxzlhc));
1333 top->AddNode(voYOUT2, 1, gGeoIdentity);
1336 void AliSHILv3::Init()
1339 // Initialise the muon shield after it has been built
1343 if(AliLog::GetGlobalDebugLevel()>0) {
1344 printf("\n%s: ",ClassName());
1345 for(i=0;i<35;i++) printf("*");
1346 printf(" SHILv3_INIT ");
1347 for(i=0;i<35;i++) printf("*");
1348 printf("\n%s: ",ClassName());
1350 // Here the SHIL initialisation code (if any!)
1351 for(i=0;i<80;i++) printf("*");
1356 void AliSHILv3::InvertPcon(TGeoPcon* pcon)
1361 Int_t nz = pcon->GetNz();
1362 Double_t* z = new Double_t[nz];
1363 Double_t* rmin = new Double_t[nz];
1364 Double_t* rmax = new Double_t[nz];
1366 Double_t* z0 = pcon->GetZ();
1367 Double_t* rmin0 = pcon->GetRmin();
1368 Double_t* rmax0 = pcon->GetRmax();
1370 for (Int_t i = 0; i < nz; i++) {
1376 for (Int_t i = 0; i < nz; i++) {
1377 Int_t j = nz - i - 1;
1378 pcon->DefineSection(i, - z[j], rmin[j], rmax[j]);
1386 TGeoPcon* AliSHILv3::MakeShapeFromTemplate(const TGeoPcon* pcon, Float_t drMin, Float_t drMax)
1389 // Returns new shape based on a template changing
1390 // the inner radii by drMin and the outer radii by drMax.
1392 Int_t nz = pcon->GetNz();
1393 TGeoPcon* cpcon = new TGeoPcon(0., 360., nz);
1394 for (Int_t i = 0; i < nz; i++)
1395 cpcon->DefineSection(i, pcon->GetZ(i), pcon->GetRmin(i) + drMin, pcon->GetRmax(i) + drMax);