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 **************************************************************************/
22 ///////////////////////////////////////////////////////////////////////////////
24 #include "AliABSOvF.h"
32 //_____________________________________________________________________________
33 AliABSOvF::AliABSOvF()
36 // Default constructor
40 //_____________________________________________________________________________
41 AliABSOvF::AliABSOvF(const char *name, const char *title)
45 // Standard constructor
52 //_____________________________________________________________________________
53 void AliABSOvF::CreateGeometry()
55 // Create the absorber geometry
56 // The inner part of the absorber (shield) is written also in ALIFE format
58 enum {kC=1605, kAl=1608, kFe=1609, kCu=1610, kW=1611, kPb=1612,
59 kNiCuW=1620, kVacuum=1615, kAir=1614, kConcrete=1616,
60 kPolyCH2=1617, kSteel=1609, kInsulation=1613, kPolyCc=1619};
62 Int_t *idtmed = fIdtmed->GetArray()-1599;
64 Float_t par[24], cpar[5], cpar0[5], pcpar[12], tpar[3], tpar0[3];
67 AliALIFE* flukaGeom = new AliALIFE("frontshield.alife", "abso_vol.inp");
69 #include "ABSOSHILConst.h"
70 #include "ABSOConst.h"
75 fMLayers[0][ 0] = kAir; fZLayers[0][ 0] = zAbsStart;
76 fMLayers[0][ 1] = kC; fZLayers[0][ 1] = zAbsCc;
77 fMLayers[0][ 2] = kConcrete; fZLayers[0][ 2] = zRear-dRear-dzFe;
78 fMLayers[0][ 3] = kFe; fZLayers[0][ 3] = zRear-dRear;
79 fMLayers[0][ 4] = kPb; fZLayers[0][ 4] = fZLayers[0][3] + 5.;
80 fMLayers[0][ 5] = kPolyCH2; fZLayers[0][ 5] = fZLayers[0][4] + 5.;
81 fMLayers[0][ 6] = kPb; fZLayers[0][ 6] = fZLayers[0][5] + 5.;
82 fMLayers[0][ 7] = kPolyCH2; fZLayers[0][ 7] = fZLayers[0][6] + 5.;
83 fMLayers[0][ 8] = kPb; fZLayers[0][ 8] = fZLayers[0][7] + 5.;
84 fMLayers[0][ 9] = kPolyCH2; fZLayers[0][ 9] = fZLayers[0][8] + 5.;
85 fMLayers[0][10] = kPb; fZLayers[0][10] = zRear;
88 fMLayers[1][0] = fMLayers[0][0]; fZLayers[1][0] = fZLayers[0][0];
89 fMLayers[1][1] = fMLayers[0][1]; fZLayers[1][1] = fZLayers[0][1];
90 fMLayers[1][2] = fMLayers[0][2]; fZLayers[1][2] = fZLayers[0][2];
91 fMLayers[1][3] = fMLayers[0][3]; fZLayers[1][3] = fZLayers[0][3];
92 fMLayers[1][4] = kNiCuW; fZLayers[1][4] = zRear;
94 Float_t dTube=0.1; // tube thickness
95 Float_t dInsu=0.5; // insulation thickness
96 Float_t dEnve=0.1; // protective envelope thickness
97 Float_t dFree=0.5; // clearance thickness
100 // Mother volume and outer shielding: Pb
105 par[3] = -(zRear-zAbsStart)/2.;
107 par[5] = zAbsStart * TMath::Tan(theta1);
109 par[6] = par[3]+(zNose-zAbsStart);
111 par[8] = zNose * TMath::Tan(theta1);
113 par[9] = par[3]+(zConeTPC-zAbsStart);
115 par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(theta2);
117 par[12] = par[3]+(zOpen-zAbsStart);
119 par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(accMax);
121 par[15] = par[3]+(zRear-dRear-zAbsStart);
122 par[16] = rAbs + (par[15] - par[12]) * TMath::Tan(thetaOpen1) ;
123 par[17] = par[14] + (par[15] - par[12]) * TMath::Tan(accMax);
125 par[18] = par[3]+(zRear-dRear-zAbsStart);
126 par[19] = (zRear-dRear) * TMath::Tan(accMin);
127 par[20] = par[14] + (par[18] - par[12]) * TMath::Tan(accMax);
130 par[22] = zRear* TMath::Tan(accMin);
131 par[23] = par[20] + (par[21] - par[18]) * TMath::Tan(accMax);
132 gMC->Gsvolu("ABSS", "PCON", idtmed[kPb], par, 24);
133 { // Begin local scope for i
134 for (Int_t i=4; i<18; i+=3) par[i] = 0;
135 } // End local scope for i
136 gMC->Gsvolu("ABSM", "PCON", idtmed[kVacuum+40], par, 24);
137 gMC->Gspos("ABSS", 1, "ABSM", 0., 0., 0., 0, "ONLY");
142 par[4] = par[5] -dSteel;
143 par[7] = par[8] -dSteel;
144 par[10]= par[11]-dSteel;
145 par[13]= par[14]-dSteel;
146 par[16]= par[17]-dSteel;
147 par[19]= par[20]-dSteel;
148 par[22]= par[23]-dSteel;
149 gMC->Gsvolu("ABST", "PCON", idtmed[kSteel], par, 24);
150 gMC->Gspos("ABST", 1, "ABSS", 0., 0., 0., 0, "ONLY");
152 // Polyethylene shield
154 cpar[0] = (zRear - zConeTPC) / 2.;
155 cpar[1] = zConeTPC * TMath::Tan(accMax);
156 cpar[2] = cpar[1] + dPoly;
157 cpar[3] = zRear * TMath::Tan(accMax);
158 cpar[4] = cpar[3] + dPoly;
159 gMC->Gsvolu("APOL", "CONE", idtmed[kPolyCH2+40], cpar, 5);
160 dz = (zRear-zAbsStart)/2.-cpar[0];
161 gMC->Gspos("APOL", 1, "ABSS", 0., 0., dz, 0, "ONLY");
164 // Tungsten nose to protect TPC
166 cpar[0] = (zNose - zAbsStart) / 2.;
167 cpar[1] = zAbsStart * TMath::Tan(accMax);
168 cpar[2] = zAbsStart * TMath::Tan(theta1)-dSteel;
169 cpar[3] = zNose * TMath::Tan(accMax);
170 cpar[4] = zNose * TMath::Tan(theta1)-dSteel;
171 gMC->Gsvolu("ANOS", "CONE", idtmed[kW], cpar, 5);
173 dz = -(zRear-zAbsStart)/2.+cpar[0];
174 gMC->Gspos("ANOS", 1, "ABSS", 0., 0., dz, 0, "ONLY");
176 // Tungsten inner shield
178 Float_t zW=zTwoDeg+.1;
179 Float_t dZ = zW+(zRear-dRear-zW)/2.;
186 pcpar[5] = zW * TMath::Tan(accMin);
189 pcpar[8] = zOpen * TMath::Tan(accMin);
190 pcpar[9] = zRear-dRear-dZ;
191 pcpar[10] = rAbs+(zRear-dRear-zOpen) * TMath::Tan(thetaOpen1);
192 pcpar[11] = (zRear-dRear) * TMath::Tan(accMin);
194 gMC->Gsvolu("AWIN", "PCON", idtmed[kNiCuW+40], pcpar, 12);
196 dz=(zW+zRear-dRear)/2-(zAbsStart+zRear)/2.;
197 gMC->Gspos("AWIN", 1, "ABSS", 0., 0., dz, 0, "ONLY");
199 // Inner tracking region
206 pcpar[3] = -(zRear-zAbsStart)/2.;
208 pcpar[5] = zAbsStart * TMath::Tan(accMax);
209 pcpar[6] = pcpar[3]+(zTwoDeg-zAbsStart);
211 pcpar[8] = zTwoDeg * TMath::Tan(accMax);
212 pcpar[9] = -pcpar[3];
213 pcpar[10] = zRear * TMath::Tan(accMin);
214 pcpar[11] = zRear * TMath::Tan(accMax);
215 gMC->Gsvolu("AITR", "PCON", idtmed[fMLayers[0][4]], pcpar, 12);
217 // special Pb medium for last 5 cm of Pb
218 Float_t zr=zRear-2.-0.001;
220 cpar[1] = zr * TMath::Tan(thetaR);
221 cpar[2] = zr * TMath::Tan(accMax);
222 cpar[3] = cpar[1] + TMath::Tan(thetaR) * 2;
223 cpar[4] = cpar[2] + TMath::Tan(accMax) * 2;
224 gMC->Gsvolu("ARPB", "CONE", idtmed[fMLayers[0][4]], cpar, 5);
225 dz=(zRear-zAbsStart)/2.-cpar[0]-0.001;
226 gMC->Gspos("ARPB", 1, "AITR", 0., 0., dz, 0, "ONLY");
228 // concrete cone: concrete
230 pcpar[9] = pcpar[3]+(zRear-dRear-zAbsStart);
231 pcpar[10] = (zRear-dRear) * TMath::Tan(accMin);
232 pcpar[11] = (zRear-dRear) * TMath::Tan(accMax);
233 gMC->Gsvolu("ACON", "PCON", idtmed[fMLayers[0][2]+40], pcpar, 12);
234 gMC->Gspos("ACON", 1, "AITR", 0., 0., 0., 0, "ONLY");
238 zr = zRear-dRear-dzFe-1.;
240 cpar[1] = zr * TMath::Tan(accMin);
241 cpar[2] = zr * TMath::Tan(accMax);
242 cpar[3] = cpar[1] + TMath::Tan(thetaR) * dzFe;
243 cpar[4] = cpar[2] + TMath::Tan(accMax) * dzFe;
244 gMC->Gsvolu("ACFE", "CONE",idtmed[fMLayers[0][3]], cpar, 5);
246 dz = (zRear-zAbsStart)/2.-dRear-dzFe/2.-1.;
248 gMC->Gspos("ACFE", 1, "ACON", 0., 0., dz, 0, "ONLY");
252 // carbon cone: carbon
254 pcpar[9] = pcpar[3]+(zAbsCc-zAbsStart);
255 pcpar[10] = zAbsCc * TMath::Tan(accMin);
256 pcpar[11] = zAbsCc * TMath::Tan(accMax);
257 gMC->Gsvolu("ACAR", "PCON", idtmed[fMLayers[0][1]+40], pcpar, 12);
258 gMC->Gspos("ACAR", 1, "ACON", 0., 0., 0., 0, "ONLY");
260 // carbon cone outer region
264 cpar[2] = zAbsStart* TMath::Tan(accMax);
266 cpar[4] = cpar[2]+2. * cpar[0] * TMath::Tan(accMax);
268 gMC->Gsvolu("ACAO", "CONE", idtmed[fMLayers[0][1]], cpar, 5);
269 dz=-(zRear-zAbsStart)/2.+cpar[0];
270 gMC->Gspos("ACAO", 1, "ACAR", 0., 0., dz, 0, "ONLY");
276 zr=zRear-(dRear-epsi);
277 cpar[0] = (dRear-epsi)/2.;
278 cpar[1] = zr * TMath::Tan(accMin);
279 cpar[2] = zr * TMath::Tan(thetaR*repsi);
280 cpar[3] = cpar[1] + TMath::Tan(accMin) * (dRear-epsi);
281 cpar[4] = cpar[2] + TMath::Tan(thetaR*repsi) * (dRear-epsi);
282 gMC->Gsvolu("ARW0", "CONE", idtmed[fMLayers[1][4]+40], cpar, 5);
283 dz=(zRear-zAbsStart)/2.-cpar[0];
284 gMC->Gspos("ARW0", 1, "AITR", 0., 0., dz, 0, "ONLY");
286 // special W medium for last 5 cm of W
289 cpar[1] = zr * TMath::Tan(accMin);
290 cpar[2] = zr * TMath::Tan(thetaR*repsi);
291 cpar[3] = cpar[1] + TMath::Tan(accMin) * 5.;
292 cpar[4] = cpar[2] + TMath::Tan(thetaR*repsi) * 5.;
293 gMC->Gsvolu("ARW1", "CONE", idtmed[fMLayers[1][4]+20], cpar, 5);
294 dz=(dRear-epsi)/2.-cpar[0];
295 gMC->Gspos("ARW1", 1, "ARW0", 0., 0., dz, 0, "ONLY");
297 // PolyEthylene Layers
298 Float_t drMin=TMath::Tan(thetaR) * 5;
299 Float_t drMax=TMath::Tan(accMax) * 5;
300 gMC->Gsvolu("ARPE", "CONE", idtmed[fMLayers[0][5]], cpar, 0);
302 { // Begin local scope for i
303 for (Int_t i=0; i<3; i++) {
304 zr=zRear-dRear+5+i*10.;
305 cpar[1] = zr * TMath::Tan(thetaR);
306 cpar[2] = zr * TMath::Tan(accMax);
307 cpar[3] = cpar[1] + drMin;
308 cpar[4] = cpar[2] + drMax;
309 dz=(zRear-zAbsStart)/2.-cpar[0]-5.-(2-i)*10;
310 gMC->Gsposp("ARPE", i+1, "AITR", 0., 0., dz, 0, "ONLY",cpar,5);
312 } // End local scope for i
313 gMC->Gspos("AITR", 1, "ABSS", 0., 0., 0., 0, "ONLY");
314 dz = (zRear-zAbsStart)/2.+zAbsStart;
315 gMC->Gspos("ABSM", 1, "ALIC", 0., 0., dz, 0, "ONLY");
320 // pipe and heating jackets
324 tpar0[2]=(zOpen-zAbsStart)/2;
327 gMC->Gsvolu("AV11", "TUBE", idtmed[kSteel+40], tpar0, 3);
333 tpar[1]=tpar[0]+dInsu;
334 gMC->Gsvolu("AI11", "TUBE", idtmed[kInsulation+40], tpar, 3);
335 gMC->Gspos("AI11", 1, "AV11", 0., 0., 0., 0, "ONLY");
338 tpar[0]=tpar[1]+dEnve;
339 tpar[1]=tpar[0]+dFree;
340 gMC->Gsvolu("AP11", "TUBE", idtmed[kAir+40], tpar, 3);
341 gMC->Gspos("AP11", 1, "AV11", 0., 0., 0., 0, "ONLY");
343 dz=-(zRear-zAbsStart)/2.+tpar0[2];
344 gMC->Gspos("AV11", 1, "ABSM", 0., 0., dz, 0, "ONLY");
348 // Float_t zTwoDeg1=zTwoDeg-0.9/TMath::Tan(accMin);
349 Float_t pos[3]={0.,0.,0.};
359 = {"VACUUM", "STEEL", "PIPEINSU", "STEEL", "AIR", "AIR"};
361 = {"MF", "MF", "MF", "MF", "MF", "MF"};
363 = {"$SHH", "$SHH", "$SHH", "$SHH", "$SHH", "$SHH"};
365 = {"VACUUM", "STEEL", "PIPEINSU", "STEEL", "AIR", "CARBON"};
367 = {"MF", "MF", "MF", "MF", "MF", "MF"};
369 = {"$SHH", "$SHH", "$SHH", "$SHH", "$SHH", "$SHS"};
371 flukaGeom->Comment("Front Absorber Cylyndrical Section");
372 flukaGeom->SetDefaultVolume("*ACR02","*ACR02" );
373 flukaGeom->OnionCylinder(r, 6 , zAbsStart, zOpen, pos, materialsB, fieldsB, cutsB);
374 flukaGeom->Cone(rAbs, rAbs, -rAbs, -rAbs, zTwoDeg, zOpen, pos,
375 "NIW", "MF", "$SHH");
382 cpar0[0]=(zRear-dRear-zOpen)/2;
385 Float_t dR=2.*cpar0[0]*TMath::Tan(thetaOpen1);
386 cpar0[3]=cpar0[1]+dR;
387 cpar0[4]=cpar0[2]+dR;
388 gMC->Gsvolu("AV21", "CONE", idtmed[kSteel+40], cpar0, 5);
394 cpar[1]=cpar0[1]+dTube;
395 cpar[2]=cpar0[1]+dTube+dInsu;
396 cpar[3]=cpar0[3]+dTube;
397 cpar[4]=cpar0[3]+dTube+dInsu;
398 gMC->Gsvolu("AI21", "CONE", idtmed[kInsulation+40], cpar, 5);
399 gMC->Gspos("AI21", 1, "AV21", 0., 0., 0., 0, "ONLY");
402 cpar[1]=cpar0[1]+dTube+dInsu+dEnve;
404 cpar[3]=cpar0[1]+dTube+dInsu+dEnve+dR;
407 gMC->Gsvolu("AP21", "CONE", idtmed[kAir+40], cpar, 5);
408 gMC->Gspos("AP21", 1, "AV21", 0., 0., 0., 0, "ONLY");
410 dz=(zRear-zAbsStart)/2.-cpar0[0]-dRear;
411 gMC->Gspos("AV21", 1, "ABSM", 0., 0., dz, 0, "ONLY");
415 Float_t r1[7], r2[7];
433 flukaGeom->Comment("Front Absorber Conical Section");
434 flukaGeom->OnionCone(r1, r2, 7 , zOpen, zRear-dRear, pos, materialsA, fieldsA, cutsA);
435 flukaGeom->Cone(r1[6], r2[6], -1., -1.,
436 zOpen, zRear-dRear, pos, "NIW", "MF", "$SHH");
445 //_____________________________________________________________________________
447 void AliABSOvF::Init()
450 // Initialisation of the muon absorber after it has been built
454 for(i=0;i<35;i++) printf("*");
455 printf(" ABSOvF_INIT ");
456 for(i=0;i<35;i++) printf("*");
459 for(i=0;i<80;i++) printf("*");