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 Revision 1.3 2001/01/12 13:14:49 morsch
19 Store absorber composition information in fMLayers and fZLayers
20 Rear: 25 cm Fe + 4*5cm Pb + 3*5cm PolyCH2
26 ///////////////////////////////////////////////////////////////////////////////
28 #include "AliABSOvF.h"
35 //_____________________________________________________________________________
36 AliABSOvF::AliABSOvF()
39 // Default constructor
43 //_____________________________________________________________________________
44 AliABSOvF::AliABSOvF(const char *name, const char *title)
48 // Standard constructor
55 //_____________________________________________________________________________
56 void AliABSOvF::CreateGeometry()
58 // Create the absorber geometry
59 // The inner part of the absorber (shield) is written also in ALIFE format
61 enum {kC=1605, kAl=1608, kFe=1609, kCu=1610, kW=1611, kPb=1612,
62 kNiCuW=1620, kVacuum=1615, kAir=1614, kConcrete=1616,
63 kPolyCH2=1617, kSteel=1609, kInsulation=1613, kPolyCc=1619};
65 Int_t *idtmed = fIdtmed->GetArray()-1599;
67 Float_t par[24], cpar[5], cpar0[5], pcpar[12], tpar[3], tpar0[3];
70 AliALIFE* flukaGeom = new AliALIFE("frontshield.alife", "abso_vol.inp");
72 #include "ABSOSHILConst.h"
73 #include "ABSOConst.h"
78 fMLayers[0][ 0] = kAir; fZLayers[0][ 0] = zAbsStart;
79 fMLayers[0][ 1] = kC; fZLayers[0][ 1] = zAbsCc;
80 fMLayers[0][ 2] = kConcrete; fZLayers[0][ 2] = zRear-dRear-dzFe;
81 fMLayers[0][ 3] = kFe; fZLayers[0][ 3] = zRear-dRear;
82 fMLayers[0][ 4] = kPb; fZLayers[0][ 4] = fZLayers[0][3] + 5.;
83 fMLayers[0][ 5] = kPolyCH2; fZLayers[0][ 5] = fZLayers[0][4] + 5.;
84 fMLayers[0][ 6] = kPb; fZLayers[0][ 6] = fZLayers[0][5] + 5.;
85 fMLayers[0][ 7] = kPolyCH2; fZLayers[0][ 7] = fZLayers[0][6] + 5.;
86 fMLayers[0][ 8] = kPb; fZLayers[0][ 8] = fZLayers[0][7] + 5.;
87 fMLayers[0][ 9] = kPolyCH2; fZLayers[0][ 9] = fZLayers[0][8] + 5.;
88 fMLayers[0][10] = kPb; fZLayers[0][10] = zRear;
91 fMLayers[1][0] = fMLayers[0][0]; fZLayers[1][0] = fZLayers[0][0];
92 fMLayers[1][1] = fMLayers[0][1]; fZLayers[1][1] = fZLayers[0][1];
93 fMLayers[1][2] = fMLayers[0][2]; fZLayers[1][2] = fZLayers[0][2];
94 fMLayers[1][3] = fMLayers[0][3]; fZLayers[1][3] = fZLayers[0][3];
95 fMLayers[1][4] = kNiCuW; fZLayers[1][4] = zRear;
97 Float_t dTube=0.1; // tube thickness
98 Float_t dInsu=0.5; // insulation thickness
99 Float_t dEnve=0.1; // protective envelope thickness
100 Float_t dFree=0.5; // clearance thickness
103 // Mother volume and outer shielding: Pb
108 par[3] = -(zRear-zAbsStart)/2.;
110 par[5] = zAbsStart * TMath::Tan(theta1);
112 par[6] = par[3]+(zNose-zAbsStart);
114 par[8] = zNose * TMath::Tan(theta1);
116 par[9] = par[3]+(zConeTPC-zAbsStart);
118 par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(theta2);
120 par[12] = par[3]+(zOpen-zAbsStart);
122 par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(accMax);
124 par[15] = par[3]+(zRear-dRear-zAbsStart);
125 par[16] = rAbs + (par[15] - par[12]) * TMath::Tan(thetaOpen1) ;
126 par[17] = par[14] + (par[15] - par[12]) * TMath::Tan(accMax);
128 par[18] = par[3]+(zRear-dRear-zAbsStart);
129 par[19] = (zRear-dRear) * TMath::Tan(accMin);
130 par[20] = par[14] + (par[18] - par[12]) * TMath::Tan(accMax);
133 par[22] = zRear* TMath::Tan(accMin);
134 par[23] = par[20] + (par[21] - par[18]) * TMath::Tan(accMax);
135 gMC->Gsvolu("ABSS", "PCON", idtmed[kPb], par, 24);
136 { // Begin local scope for i
137 for (Int_t i=4; i<18; i+=3) par[i] = 0;
138 } // End local scope for i
139 gMC->Gsvolu("ABSM", "PCON", idtmed[kVacuum+40], par, 24);
140 gMC->Gspos("ABSS", 1, "ABSM", 0., 0., 0., 0, "ONLY");
145 par[4] = par[5] -dSteel;
146 par[7] = par[8] -dSteel;
147 par[10]= par[11]-dSteel;
148 par[13]= par[14]-dSteel;
149 par[16]= par[17]-dSteel;
150 par[19]= par[20]-dSteel;
151 par[22]= par[23]-dSteel;
152 gMC->Gsvolu("ABST", "PCON", idtmed[kSteel], par, 24);
153 gMC->Gspos("ABST", 1, "ABSS", 0., 0., 0., 0, "ONLY");
155 // Polyethylene shield
157 cpar[0] = (zRear - zConeTPC) / 2.;
158 cpar[1] = zConeTPC * TMath::Tan(accMax);
159 cpar[2] = cpar[1] + dPoly;
160 cpar[3] = zRear * TMath::Tan(accMax);
161 cpar[4] = cpar[3] + dPoly;
162 gMC->Gsvolu("APOL", "CONE", idtmed[kPolyCH2+40], cpar, 5);
163 dz = (zRear-zAbsStart)/2.-cpar[0];
164 gMC->Gspos("APOL", 1, "ABSS", 0., 0., dz, 0, "ONLY");
167 // Tungsten nose to protect TPC
169 cpar[0] = (zNose - zAbsStart) / 2.;
170 cpar[1] = zAbsStart * TMath::Tan(accMax);
171 cpar[2] = zAbsStart * TMath::Tan(theta1)-dSteel;
172 cpar[3] = zNose * TMath::Tan(accMax);
173 cpar[4] = zNose * TMath::Tan(theta1)-dSteel;
174 gMC->Gsvolu("ANOS", "CONE", idtmed[kW], cpar, 5);
176 dz = -(zRear-zAbsStart)/2.+cpar[0];
177 gMC->Gspos("ANOS", 1, "ABSS", 0., 0., dz, 0, "ONLY");
179 // Tungsten inner shield
181 Float_t zW=zTwoDeg+.1;
182 Float_t dZ = zW+(zRear-dRear-zW)/2.;
189 pcpar[5] = zW * TMath::Tan(accMin);
192 pcpar[8] = zOpen * TMath::Tan(accMin);
193 pcpar[9] = zRear-dRear-dZ;
194 pcpar[10] = rAbs+(zRear-dRear-zOpen) * TMath::Tan(thetaOpen1);
195 pcpar[11] = (zRear-dRear) * TMath::Tan(accMin);
197 gMC->Gsvolu("AWIN", "PCON", idtmed[kNiCuW+40], pcpar, 12);
199 dz=(zW+zRear-dRear)/2-(zAbsStart+zRear)/2.;
200 gMC->Gspos("AWIN", 1, "ABSS", 0., 0., dz, 0, "ONLY");
202 // Inner tracking region
209 pcpar[3] = -(zRear-zAbsStart)/2.;
211 pcpar[5] = zAbsStart * TMath::Tan(accMax);
212 pcpar[6] = pcpar[3]+(zTwoDeg-zAbsStart);
214 pcpar[8] = zTwoDeg * TMath::Tan(accMax);
215 pcpar[9] = -pcpar[3];
216 pcpar[10] = zRear * TMath::Tan(accMin);
217 pcpar[11] = zRear * TMath::Tan(accMax);
218 gMC->Gsvolu("AITR", "PCON", idtmed[fMLayers[0][4]], pcpar, 12);
220 // special Pb medium for last 5 cm of Pb
221 Float_t zr=zRear-2.-0.001;
223 cpar[1] = zr * TMath::Tan(thetaR);
224 cpar[2] = zr * TMath::Tan(accMax);
225 cpar[3] = cpar[1] + TMath::Tan(thetaR) * 2;
226 cpar[4] = cpar[2] + TMath::Tan(accMax) * 2;
227 gMC->Gsvolu("ARPB", "CONE", idtmed[fMLayers[0][4]], cpar, 5);
228 dz=(zRear-zAbsStart)/2.-cpar[0]-0.001;
229 gMC->Gspos("ARPB", 1, "AITR", 0., 0., dz, 0, "ONLY");
231 // concrete cone: concrete
233 pcpar[9] = pcpar[3]+(zRear-dRear-zAbsStart);
234 pcpar[10] = (zRear-dRear) * TMath::Tan(accMin);
235 pcpar[11] = (zRear-dRear) * TMath::Tan(accMax);
236 gMC->Gsvolu("ACON", "PCON", idtmed[fMLayers[0][2]+40], pcpar, 12);
237 gMC->Gspos("ACON", 1, "AITR", 0., 0., 0., 0, "ONLY");
241 zr = zRear-dRear-dzFe-1.;
243 cpar[1] = zr * TMath::Tan(accMin);
244 cpar[2] = zr * TMath::Tan(accMax);
245 cpar[3] = cpar[1] + TMath::Tan(thetaR) * dzFe;
246 cpar[4] = cpar[2] + TMath::Tan(accMax) * dzFe;
247 gMC->Gsvolu("ACFE", "CONE",idtmed[fMLayers[0][3]], cpar, 5);
249 dz = (zRear-zAbsStart)/2.-dRear-dzFe/2.-1.;
251 gMC->Gspos("ACFE", 1, "ACON", 0., 0., dz, 0, "ONLY");
255 // carbon cone: carbon
257 pcpar[9] = pcpar[3]+(zAbsCc-zAbsStart);
258 pcpar[10] = zAbsCc * TMath::Tan(accMin);
259 pcpar[11] = zAbsCc * TMath::Tan(accMax);
260 gMC->Gsvolu("ACAR", "PCON", idtmed[fMLayers[0][1]+40], pcpar, 12);
261 gMC->Gspos("ACAR", 1, "ACON", 0., 0., 0., 0, "ONLY");
263 // carbon cone outer region
267 cpar[2] = zAbsStart* TMath::Tan(accMax);
269 cpar[4] = cpar[2]+2. * cpar[0] * TMath::Tan(accMax);
271 gMC->Gsvolu("ACAO", "CONE", idtmed[fMLayers[0][1]], cpar, 5);
272 dz=-(zRear-zAbsStart)/2.+cpar[0];
273 gMC->Gspos("ACAO", 1, "ACAR", 0., 0., dz, 0, "ONLY");
279 zr=zRear-(dRear-epsi);
280 cpar[0] = (dRear-epsi)/2.;
281 cpar[1] = zr * TMath::Tan(accMin);
282 cpar[2] = zr * TMath::Tan(thetaR*repsi);
283 cpar[3] = cpar[1] + TMath::Tan(accMin) * (dRear-epsi);
284 cpar[4] = cpar[2] + TMath::Tan(thetaR*repsi) * (dRear-epsi);
285 gMC->Gsvolu("ARW0", "CONE", idtmed[fMLayers[1][4]+40], cpar, 5);
286 dz=(zRear-zAbsStart)/2.-cpar[0];
287 gMC->Gspos("ARW0", 1, "AITR", 0., 0., dz, 0, "ONLY");
289 // special W medium for last 5 cm of W
292 cpar[1] = zr * TMath::Tan(accMin);
293 cpar[2] = zr * TMath::Tan(thetaR*repsi);
294 cpar[3] = cpar[1] + TMath::Tan(accMin) * 5.;
295 cpar[4] = cpar[2] + TMath::Tan(thetaR*repsi) * 5.;
296 gMC->Gsvolu("ARW1", "CONE", idtmed[fMLayers[1][4]+20], cpar, 5);
297 dz=(dRear-epsi)/2.-cpar[0];
298 gMC->Gspos("ARW1", 1, "ARW0", 0., 0., dz, 0, "ONLY");
300 // PolyEthylene Layers
301 Float_t drMin=TMath::Tan(thetaR) * 5;
302 Float_t drMax=TMath::Tan(accMax) * 5;
303 gMC->Gsvolu("ARPE", "CONE", idtmed[fMLayers[0][5]], cpar, 0);
305 { // Begin local scope for i
306 for (Int_t i=0; i<3; i++) {
307 zr=zRear-dRear+5+i*10.;
308 cpar[1] = zr * TMath::Tan(thetaR);
309 cpar[2] = zr * TMath::Tan(accMax);
310 cpar[3] = cpar[1] + drMin;
311 cpar[4] = cpar[2] + drMax;
312 dz=(zRear-zAbsStart)/2.-cpar[0]-5.-(2-i)*10;
313 gMC->Gsposp("ARPE", i+1, "AITR", 0., 0., dz, 0, "ONLY",cpar,5);
315 } // End local scope for i
316 gMC->Gspos("AITR", 1, "ABSS", 0., 0., 0., 0, "ONLY");
317 dz = (zRear-zAbsStart)/2.+zAbsStart;
318 gMC->Gspos("ABSM", 1, "ALIC", 0., 0., dz, 0, "ONLY");
323 // pipe and heating jackets
327 tpar0[2]=(zOpen-zAbsStart)/2;
330 gMC->Gsvolu("AV11", "TUBE", idtmed[kSteel+40], tpar0, 3);
336 tpar[1]=tpar[0]+dInsu;
337 gMC->Gsvolu("AI11", "TUBE", idtmed[kInsulation+40], tpar, 3);
338 gMC->Gspos("AI11", 1, "AV11", 0., 0., 0., 0, "ONLY");
341 tpar[0]=tpar[1]+dEnve;
342 tpar[1]=tpar[0]+dFree;
343 gMC->Gsvolu("AP11", "TUBE", idtmed[kAir+40], tpar, 3);
344 gMC->Gspos("AP11", 1, "AV11", 0., 0., 0., 0, "ONLY");
346 dz=-(zRear-zAbsStart)/2.+tpar0[2];
347 gMC->Gspos("AV11", 1, "ABSM", 0., 0., dz, 0, "ONLY");
351 // Float_t zTwoDeg1=zTwoDeg-0.9/TMath::Tan(accMin);
352 Float_t pos[3]={0.,0.,0.};
362 = {"VACUUM", "STEEL", "PIPEINSU", "STEEL", "AIR", "AIR"};
364 = {"MF", "MF", "MF", "MF", "MF", "MF"};
366 = {"$SHH", "$SHH", "$SHH", "$SHH", "$SHH", "$SHH"};
368 = {"VACUUM", "STEEL", "PIPEINSU", "STEEL", "AIR", "CARBON"};
370 = {"MF", "MF", "MF", "MF", "MF", "MF"};
372 = {"$SHH", "$SHH", "$SHH", "$SHH", "$SHH", "$SHS"};
374 flukaGeom->Comment("Front Absorber Cylyndrical Section");
375 flukaGeom->SetDefaultVolume("*ACR02","*ACR02" );
376 flukaGeom->OnionCylinder(r, 6 , zAbsStart, zOpen, pos, materialsB, fieldsB, cutsB);
377 flukaGeom->Cone(rAbs, rAbs, -rAbs, -rAbs, zTwoDeg, zOpen, pos,
378 "NIW", "MF", "$SHH");
385 cpar0[0]=(zRear-dRear-zOpen)/2;
388 Float_t dR=2.*cpar0[0]*TMath::Tan(thetaOpen1);
389 cpar0[3]=cpar0[1]+dR;
390 cpar0[4]=cpar0[2]+dR;
391 gMC->Gsvolu("AV21", "CONE", idtmed[kSteel+40], cpar0, 5);
397 cpar[1]=cpar0[1]+dTube;
398 cpar[2]=cpar0[1]+dTube+dInsu;
399 cpar[3]=cpar0[3]+dTube;
400 cpar[4]=cpar0[3]+dTube+dInsu;
401 gMC->Gsvolu("AI21", "CONE", idtmed[kInsulation+40], cpar, 5);
402 gMC->Gspos("AI21", 1, "AV21", 0., 0., 0., 0, "ONLY");
405 cpar[1]=cpar0[1]+dTube+dInsu+dEnve;
407 cpar[3]=cpar0[1]+dTube+dInsu+dEnve+dR;
410 gMC->Gsvolu("AP21", "CONE", idtmed[kAir+40], cpar, 5);
411 gMC->Gspos("AP21", 1, "AV21", 0., 0., 0., 0, "ONLY");
413 dz=(zRear-zAbsStart)/2.-cpar0[0]-dRear;
414 gMC->Gspos("AV21", 1, "ABSM", 0., 0., dz, 0, "ONLY");
418 Float_t r1[7], r2[7];
436 flukaGeom->Comment("Front Absorber Conical Section");
437 flukaGeom->OnionCone(r1, r2, 7 , zOpen, zRear-dRear, pos, materialsA, fieldsA, cutsA);
438 flukaGeom->Cone(r1[6], r2[6], -1., -1.,
439 zOpen, zRear-dRear, pos, "NIW", "MF", "$SHH");
448 //_____________________________________________________________________________
450 void AliABSOvF::Init()
453 // Initialisation of the muon absorber after it has been built
457 for(i=0;i<35;i++) printf("*");
458 printf(" ABSOvF_INIT ");
459 for(i=0;i<35;i++) printf("*");
462 for(i=0;i<80;i++) printf("*");