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4c039060 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/*
17$Log$
18*/
19
fe4da5cc 20///////////////////////////////////////////////////////////////////////////////
21// //
22// Muon ABSOrber //
23// This class contains the description of the muon absorber geometry //
24// //
25//Begin_Html
26/*
1439f98e 27<img src="picts/AliABSOClass.gif">
fe4da5cc 28</pre>
29<br clear=left>
30<font size=+2 color=red>
31<p>The responsible person for this module is
32<a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>.
33</font>
34<pre>
35*/
36//End_Html
37// //
38// //
39///////////////////////////////////////////////////////////////////////////////
40
41#include "AliABSO.h"
42#include "AliRun.h"
fe4da5cc 43#include "AliConst.h"
44
45ClassImp(AliABSO)
46
47//_____________________________________________________________________________
48AliABSO::AliABSO()
49{
50 //
51 // Default constructor
52 //
53}
54
55//_____________________________________________________________________________
56AliABSO::AliABSO(const char *name, const char *title)
b8032157 57 : AliModule(name,title)
fe4da5cc 58{
59 //
60 // Standard constructor
61 //
62 SetMarkerColor(7);
63 SetMarkerStyle(2);
64 SetMarkerSize(0.4);
65}
66
fe4da5cc 67//_____________________________________________________________________________
68void AliABSO::CreateGeometry()
69{
70 //
71 // Creation of the geometry of the muon absorber
72 //
73 //Begin_Html
74 /*
1439f98e 75 <img src="picts/AliABSOTree.gif">
fe4da5cc 76 */
77 //End_Html
78 //Begin_Html
79 /*
1439f98e 80 <img src="picts/AliABSO.gif">
fe4da5cc 81 */
82 //End_Html
83
ad51aeb0 84 Int_t *idtmed = fIdtmed->GetArray()-1599;
fe4da5cc 85
86 Float_t d_pb, cpar[5], dpar[12], tpar[3], zpos,
87 cpar1[5], cpar2[5], cpar3[5], cpar4[5], cpar5[12],
88 cpar7[5], cpar8[5], cpar9[5], abs_c, abs_d,
89 abs_l, cpar10[5], r_abs;
90 Float_t theta1, theta2, abs_cc, d_rear, dz, zr,
91 z_cone, d_poly, z_nose, theta_open;
92 Float_t acc_min, acc_max, par[50], d_steel, z_w,
93 theta_r, epsilon;
94 //
95 abs_d = 90.; // DEFINES DRIFT LENGTH
96 z_nose = 102.;
97 z_cone = 285.;
98 theta1 = 24.; // 1. angle defining the front absorber
99 theta2 = 5.; // 2. angle defining the front absorbe
100 acc_max = 9.; // ANGLE POLAIRE MAXIMUM
101 acc_min = 2.; // ANGLE POLAIRE MINIMUM DE DETECTION
102 abs_l = 503.;
103 d_steel = 1.; // THICKNESS OF STEEL SUPPORT
104 d_poly = 7.5;
105 d_pb = 2.5;
106 abs_cc = 315.; // DEFINES LENGTH OF CARBON
107 abs_c = 358.;
108 //abs_s = 150.; // DEFINES W-SHIELD LENGTH
109 //abs_n = 80.; // START OF NOSE
110 r_abs = 4.;
111 //r_pb = .1;
112 epsilon = .01;
113 theta_r = 3.;
114 d_rear = 35.;
115 theta_open = .75;
116 //
117 //z_l3 = 700.;
118 //zmag_in = 725.;
119 //zmag_out = 1225.;
120 //zfil_in = 1471.;
121 //zfil_out = 1591.;
122 //zcon_in = 1900.;
123 //zcon_out = 2e3;
124 //zcone_e = 859.0875;
125 //spec_l = 1800.;
126 //zplug_in = 1780.;
127 //zplug_out= 1900.;
128 //
129 // Chamber position
130 // CZ1=515.5
131 //cz1 = 511.;
132 //cz2 = 686.;
133 //cz3 = 971.;
134 //cz4 = 1245.;
135 //cz5 = 1445.;
136 //cz6 = 1610.;
137 //cz7 = 1710.;
138 //
139 // --- Outer shape of front absorber
140 par[0] = 0.;
141 par[1] = 360.;
142 par[2] = 4.;
143 par[3] = abs_d;
144 par[4] = 0.;
145 par[5] = abs_d * TMath::Tan(theta1 * kDegrad);
146 par[6] = z_nose;
147 par[7] = 0.;
148 par[8] = par[6] * TMath::Tan(theta1 * kDegrad);
149 par[9] = z_cone;
150 par[10] = 0.;
151 par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(theta2 * kDegrad);
152 par[12] = abs_l;
153 par[13] = 0.;
154 par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(acc_max * kDegrad);
cfce8870 155 gMC->Gsvolu("ABSM", "PCON", idtmed[1605], par, 15);
fe4da5cc 156 //
157 // --- Now define all elements of the absorber
158 //
159 // TUNGSTEN NOSE SEGMENT BETWEEN Z=90 AND 112 CM
160 // SHAPED ALONG A 24 DEG LINE
161 //
162 cpar1[0] = (z_nose - abs_d) / 2.;
163 cpar1[1] = abs_d * TMath::Tan(acc_max * kDegrad) + d_steel;
164 cpar1[2] = abs_d * TMath::Tan(theta1 * kDegrad);
165 cpar1[3] = z_nose * TMath::Tan(acc_max * kDegrad) + d_steel;
166 cpar1[4] = z_nose * TMath::Tan(theta1 * kDegrad);
cfce8870 167 gMC->Gsvolu("ANOS", "CONE", idtmed[1611], cpar1, 5);
fe4da5cc 168 //
169 dz = cpar1[0] + abs_d;
cfce8870 170 gMC->Gspos("ANOS", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 171 //
172 // IRON SUPPORT STRUCTURE
173 //
174 cpar2[0] = (abs_l - abs_d) / 2.;
175 cpar2[1] = abs_d * TMath::Tan(acc_max * kDegrad);
176 cpar2[2] = cpar2[1] + d_steel;
177 cpar2[3] = abs_l * TMath::Tan(acc_max * kDegrad);
178 cpar2[4] = cpar2[3] + d_steel;
cfce8870 179 gMC->Gsvolu("ASST", "CONE", idtmed[1658], cpar2, 5);
fe4da5cc 180 dz = cpar2[0] + abs_d;
cfce8870 181 gMC->Gspos("ASST", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 182 //
183 // PB FRONT SHIELD INNER SEGMENT, ALSO POLYETHYLENE WAS
184 // CONSIDERED FOR THIS REGION
185 //
186 cpar3[0] = (z_cone - z_nose) / 2.;
187 cpar3[1] = cpar1[3];
188 cpar3[2] = cpar1[3] + d_poly;
189 cpar3[3] = z_cone * TMath::Tan(acc_max * kDegrad) + d_steel;
190 cpar3[4] = cpar3[3] + d_poly;
cfce8870 191 gMC->Gsvolu("AWFS", "CONE", idtmed[1652], cpar3, 5);
fe4da5cc 192 dz = cpar3[0] + z_nose;
cfce8870 193 gMC->Gspos("AWFS", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 194 //
195 // PB OUTER SURFACE
196 //
197 cpar5[0] = 0.;
198 cpar5[1] = 360.;
199 cpar5[2] = 3.;
200 cpar5[3] = z_nose;
201 cpar5[4] = z_nose * TMath::Tan(acc_max * kDegrad) + d_steel + d_poly;
202 cpar5[5] = z_nose * TMath::Tan(theta1 * kDegrad);
203 cpar5[6] = z_cone;
204 cpar5[7] = z_cone * TMath::Tan(acc_max * kDegrad) + d_steel + d_poly;
205 cpar5[8] = cpar5[7] + d_pb;
206 cpar5[9] = abs_l;
207 cpar5[10] = abs_l * TMath::Tan(acc_max * kDegrad) + d_steel + d_poly;
208 cpar5[11] = cpar5[10] + d_pb;
cfce8870 209 gMC->Gsvolu("APBS", "PCON", idtmed[1612], cpar5, 12);
fe4da5cc 210 dz = 0.;
cfce8870 211 gMC->Gspos("APBS", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 212 //
213 // POLYETHYLEN LAYER
214 //
215 cpar4[0] = (abs_l - z_cone) / 2.;
216 cpar4[1] = z_cone * TMath::Tan(acc_max * kDegrad) + d_steel;
217 cpar4[2] = cpar4[1] + d_poly;
218 cpar4[3] = abs_l * TMath::Tan(acc_max * kDegrad) + d_steel;
219 cpar4[4] = cpar4[3] + d_poly;
cfce8870 220 gMC->Gsvolu("APOL", "CONE", idtmed[1657], cpar4, 5);
fe4da5cc 221 dz = cpar4[0] + z_cone;
cfce8870 222 gMC->Gspos("APOL", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 223 //
224 // LEAD INNER SHIELD (inner radius const up to z=abs_c)
225 //
226 z_w = r_abs / TMath::Tan(acc_min * kDegrad);
227 cpar8[0] = (abs_c - z_w) / 2.;
228 cpar8[1] = r_abs;
229 cpar8[2] = r_abs + epsilon;
230 cpar8[3] = r_abs;
231 cpar8[4] = abs_c * TMath::Tan(acc_min * kDegrad);
cfce8870 232 gMC->Gsvolu("AWI1", "CONE", idtmed[1652], cpar8, 5);
fe4da5cc 233 dz = cpar8[0] + z_w;
cfce8870 234 gMC->Gspos("AWI1", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 235 //
236 // TUNGSTEN OPENING CONE UP TO THE END
237 //
238 cpar8[0] = (abs_l - abs_c) / 2.;
239 cpar8[1] = r_abs;
240 cpar8[2] = abs_c * TMath::Tan(acc_min * kDegrad);
241 cpar8[3] = cpar8[1] + cpar8[0] * 2. * TMath::Tan(theta_open * kDegrad);
242 cpar8[4] = abs_l * TMath::Tan(acc_min * kDegrad);
cfce8870 243 gMC->Gsvolu("AWI2", "CONE", idtmed[1651], cpar8, 5);
fe4da5cc 244 dz = cpar8[0] + abs_c;
cfce8870 245 gMC->Gspos("AWI2", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 246 //
247 // CONCRETE CONE
248 //
249 cpar7[0] = (abs_l - d_rear - abs_cc) / 2.;
250 cpar7[1] = abs_cc * TMath::Tan(acc_min * kDegrad);
251 cpar7[2] = abs_cc * TMath::Tan(acc_max * kDegrad);
252 cpar7[3] = (abs_l - d_rear) * TMath::Tan(acc_min * kDegrad);
253 cpar7[4] = (abs_l - d_rear) * TMath::Tan(acc_max * kDegrad);
cfce8870 254 gMC->Gsvolu("ACON", "CONE", idtmed[1656], cpar7, 5);
fe4da5cc 255 dz = cpar7[0] + abs_cc;
cfce8870 256 gMC->Gspos("ACON", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 257 //
258 // REAR SHIELD
259 //
260 zr = abs_l - d_rear;
261 cpar9[0] = 2.5;
262 cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
263 cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
264 cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
265 cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
cfce8870 266 gMC->Gsvolu("ARE1", "CONE", idtmed[1652], cpar9, 5);
fe4da5cc 267 dz = cpar9[0] + zr;
268 zr += 5.;
cfce8870 269 gMC->Gspos("ARE1", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 270 //
271 cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
272 cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
273 cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
274 cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
cfce8870 275 gMC->Gsvolu("ARE2", "CONE", idtmed[1657], cpar9, 5);
fe4da5cc 276 dz = cpar9[0] + zr;
277 zr += 5.;
cfce8870 278 gMC->Gspos("ARE2", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 279 //
280 cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
281 cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
282 cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
283 cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
cfce8870 284 gMC->Gsvolu("ARE3", "CONE", idtmed[1652], cpar9, 5);
fe4da5cc 285 dz = cpar9[0] + zr;
286 zr += 5.;
cfce8870 287 gMC->Gspos("ARE3", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 288 //
289 cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
290 cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
291 cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
292 cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
cfce8870 293 gMC->Gsvolu("ARE4", "CONE", idtmed[1657], cpar9, 5);
fe4da5cc 294 dz = cpar9[0] + zr;
295 zr += 5.;
cfce8870 296 gMC->Gspos("ARE4", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 297 //
298 cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
299 cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
300 cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
301 cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
cfce8870 302 gMC->Gsvolu("ARE5", "CONE", idtmed[1652], cpar9, 5);
fe4da5cc 303 dz = cpar9[0] + zr;
304 zr += 5.;
cfce8870 305 gMC->Gspos("ARE5", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 306 //
307 cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
308 cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
309 cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
310 cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
cfce8870 311 gMC->Gsvolu("ARE6", "CONE", idtmed[1657], cpar9, 5);
fe4da5cc 312 dz = cpar9[0] + zr;
313 zr += 5.;
cfce8870 314 gMC->Gspos("ARE6", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 315 //
316 cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
317 cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
318 cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
319 cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
cfce8870 320 gMC->Gsvolu("ARE7", "CONE", idtmed[1612], cpar9, 5);
fe4da5cc 321 dz = cpar9[0] + zr;
322 zr += 5.;
cfce8870 323 gMC->Gspos("ARE7", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 324 //
325 // TUNGSTEN REAR SHIELD INNER PART
326 //
327 zr = abs_l - d_rear;
328 cpar10[0] = d_rear / 2.;
329 cpar10[1] = zr * TMath::Tan(acc_min * kDegrad);
330 cpar10[2] = zr * TMath::Tan(theta_r * kDegrad);
331 cpar10[3] = cpar10[1] + d_rear * TMath::Tan(acc_min * kDegrad);
332 cpar10[4] = cpar10[2] + d_rear * TMath::Tan(theta_r * kDegrad);
cfce8870 333 gMC->Gsvolu("ARIN", "CONE", idtmed[1611], cpar10, 5);
fe4da5cc 334 dz = cpar10[0] + zr;
cfce8870 335 gMC->Gspos("ARIN", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 336 //
337 // ELEMENTS OF THE BEAM PIPE TO BE POSITIONED INTO THE ABSORBER
338 //
339 // MOTHER VOLUME 1. SEGMENT
340 //
341 tpar[0] = 0.;
342 tpar[1] = r_abs;
343 tpar[2] = (abs_c - abs_d) / 2.;
cfce8870 344 gMC->Gsvolu("AATU", "TUBE", idtmed[1655], tpar, 3);
fe4da5cc 345 //
346 tpar[1] = r_abs - .8;
347 tpar[0] = tpar[1] - .2;
348 tpar[2] = (abs_c - abs_d) / 2.;
cfce8870 349 gMC->Gsvolu("ATUB", "TUBE", idtmed[1649], tpar, 3);
fe4da5cc 350 dz = 0.;
cfce8870 351 gMC->Gspos("ATUB", 1, "AATU", 0., 0., dz, 0, "ONLY");
fe4da5cc 352 //
353 dz = (abs_c - abs_d) / 2. + abs_d;
cfce8870 354 gMC->Gspos("AATU", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 355 //
356 // MOTHER VOLUME 2. SEGMENT
357 //
358 cpar[0] = (abs_l - abs_c) / 2.;
359 cpar[1] = 0.;
360 cpar[2] = r_abs;
361 cpar[3] = 0.;
362 cpar[4] = cpar[2] + cpar[0] * 2. * TMath::Tan(theta_open * kDegrad);
cfce8870 363 gMC->Gsvolu("AAT1", "CONE", idtmed[1655], cpar, 5);
fe4da5cc 364 //
365 cpar[0] = (abs_l - abs_c) / 2.;
366 cpar[2] += -.8;
367 cpar[1] = cpar[2] - .2;
368 cpar[4] += -.8;
369 cpar[3] = cpar[4] - .2;
cfce8870 370 gMC->Gsvolu("ATU1", "CONE", idtmed[1649], cpar, 5);
fe4da5cc 371 dz = 0.;
cfce8870 372 gMC->Gspos("ATU1", 1, "AAT1", 0., 0., dz, 0, "ONLY");
fe4da5cc 373 //
374 dz = (abs_l - abs_c) / 2. + abs_c;
cfce8870 375 gMC->Gspos("AAT1", 1, "ABSM", 0., 0., dz, 0, "ONLY");
fe4da5cc 376 //
cfce8870 377 gMC->Gspos("ABSM", 1, "ALIC", 0., 0., 0., 0, "ONLY");
fe4da5cc 378 //
379 // absorber support structure
380 //
381 // attention this element is positioned into ALIC
382 //
383 dpar[0] = 0.;
384 dpar[1] = 360.;
385 dpar[2] = 3.;
386 dpar[3] = abs_l;
387 dpar[4] = abs_l * TMath::Tan(acc_max * kDegrad);
388 dpar[5] = dpar[4] + 4. / TMath::Cos(acc_max * kDegrad);
389 dpar[6] = 600.;
390 dpar[7] = TMath::Tan(acc_max * kDegrad) * 600;
391 dpar[8] = dpar[7] + 4. / TMath::Cos(acc_max * kDegrad);
392 dpar[9] = 670.;
393 dpar[10] = 159.;
394 dpar[11] = 163.5;
cfce8870 395 gMC->Gsvolu("ASUP", "PCON", idtmed[1618], dpar, 12);
fe4da5cc 396 dz = 0.;
cfce8870 397 gMC->Gspos("ASUP", 1, "ALIC", 0., 0., dz, 0, "ONLY");
fe4da5cc 398 //
399 // Flange at the entrance of the absorber
400 //
401 tpar[0] = 3.;
402 tpar[1] = 5.7;
403 tpar[2] = 2.;
cfce8870 404 gMC->Gsvolu("AF63", "TUBE", idtmed[1618], tpar, 3);
fe4da5cc 405 zpos = abs_d + tpar[2];
cfce8870 406 gMC->Gspos("AF63", 1, "ABSM", 0., 0., zpos, 0, "ONLY");
fe4da5cc 407}
408
409//_____________________________________________________________________________
b8032157 410void AliABSO::DrawModule()
fe4da5cc 411{
412 //
413 // Draw a shaded view of the muon absorber
414 //
415
fe4da5cc 416 // Set everything unseen
cfce8870 417 gMC->Gsatt("*", "seen", -1);
fe4da5cc 418 //
419 // Set ALIC mother transparent
cfce8870 420 gMC->Gsatt("ALIC","SEEN",0);
fe4da5cc 421 //
422 // Set the volumes visible
cfce8870 423 gMC->Gsatt("ABSM","seen",1);
424 gMC->Gsatt("ANOS","seen",1);
425 gMC->Gsatt("ASST","seen",1);
426 gMC->Gsatt("AWFS","seen",1);
427 gMC->Gsatt("APBS","seen",1);
428 gMC->Gsatt("APOL","seen",1);
429 gMC->Gsatt("AWI1","seen",1);
430 gMC->Gsatt("AWI2","seen",1);
431 gMC->Gsatt("ACON","seen",1);
432 gMC->Gsatt("ARE1","seen",1);
433 gMC->Gsatt("ARE2","seen",1);
434 gMC->Gsatt("ARE3","seen",1);
435 gMC->Gsatt("ARE4","seen",1);
436 gMC->Gsatt("ARE5","seen",1);
437 gMC->Gsatt("ARE6","seen",1);
438 gMC->Gsatt("ARE7","seen",1);
439 gMC->Gsatt("ARIN","seen",1);
440 gMC->Gsatt("AATU","seen",1);
441 gMC->Gsatt("ATUB","seen",1);
442 gMC->Gsatt("AAT1","seen",1);
443 gMC->Gsatt("ATU1","seen",1);
444 gMC->Gsatt("ASUP","seen",1);
445 gMC->Gsatt("AF63","seen",1);
446 //
447 gMC->Gdopt("hide", "on");
448 gMC->Gdopt("shad", "on");
449 gMC->Gsatt("*", "fill", 7);
450 gMC->SetClipBox(".");
451 gMC->SetClipBox("*", 0, 3000, -3000, 3000, -6000, 6000);
452 gMC->DefaultRange();
453 gMC->Gdraw("alic", 40, 30, 0, 21.5, 15, .04, .04);
454 gMC->Gdhead(1111, "Muon Absorber");
455 gMC->Gdman(16, 6, "MAN");
456 gMC->Gdopt("hide","off");
fe4da5cc 457}
458
459//_____________________________________________________________________________
460void AliABSO::CreateMaterials()
461{
462 //
463 // Define materials for muon absorber
464 //
465 Int_t ISXFLD = gAlice->Field()->Integ();
466 Float_t SXMGMX = gAlice->Field()->Max();
467
468 Float_t apoly[2] = { 12.01,1. };
469 Float_t zpoly[2] = { 6.,1. };
470 Float_t wpoly[2] = { .33,.67 };
471 Float_t aconc[10] = { 1.,12.01,15.994,22.99,24.305,26.98,
472 28.086,39.1,40.08,55.85 };
473 Float_t zconc[10] = { 1.,6.,8.,11.,12.,13.,14.,19.,20.,26. };
474 Float_t wconc[10] = { .01,.001,.529107,.016,.002,.033872,
475 .337021,.013,.044,.014 };
476 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
477 Float_t zsteel[4] = { 26.,24.,28.,14. };
478 Float_t wsteel[4] = { .715,.18,.1,.005 };
479
480 Float_t epsil, stmin, tmaxfd, deemax, stemax;
481 //
482 // Carbon
483 AliMaterial(6, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
484 AliMaterial(26, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
485 AliMaterial(46, "CARBON$ ", 12.01, 6., 2.265, 18.8, 49.9);
486 //
487 // Aluminum
488 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
489 AliMaterial(29, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
490 AliMaterial(49, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
491 //
492 // Iron
493 AliMaterial(10, "IRON$ ", 55.85, 26., 7.87, 1.76, 17.1);
494 AliMaterial(30, "IRON$ ", 55.85, 26., 7.87, 1.76, 17.1);
495 AliMaterial(50, "IRON$ ", 55.85, 26., 7.87, 1.76, 17.1);
496 //
497 // Tungsten
498 AliMaterial(12, "TUNGSTEN$ ", 183.85, 74., 19.3, .35, 10.3);
499 AliMaterial(32, "TUNGSTEN$ ", 183.85, 74., 19.3, .35, 10.3);
500 AliMaterial(52, "TUNGSTEN$ ", 183.85, 74., 19.3, .35, 10.3);
501 //
502 // Lead
503 AliMaterial(13, "LEAD$ ", 207.19, 82., 11.35, .56, 18.5);
504 AliMaterial(33, "LEAD$ ", 207.19, 82., 11.35, .56, 18.5);
505 AliMaterial(53, "LEAD$ ", 207.19, 82., 11.35, .56, 18.5);
506 //
507 // Air
508 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
509 AliMaterial(35, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
510 AliMaterial(55, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
511 //
512 // Vacuum
513 AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
514 AliMaterial(36, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
515 AliMaterial(56, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
516 //
517 // Concrete
518 AliMixture(17, "CONCRETE$", aconc, zconc, 2.35, 10, wconc);
519 AliMixture(37, "CONCRETE$", aconc, zconc, 2.35, 10, wconc);
520 AliMixture(57, "CONCRETE$", aconc, zconc, 2.35, 10, wconc);
521 //
522 // Poly CH2
523 AliMixture(18, "POLYETHYLEN$", apoly, zpoly, .95, -2, wpoly);
524 //
525 // After a call with ratios by number (negative number of elements),
526 // the ratio array is changed to the ratio by weight, so all successive
527 // calls with the same array must specify the number of elements as
528 // positive
529 //
530 AliMixture(38, "POLYETHYLEN$", apoly, zpoly, .95, 2, wpoly);
531 AliMixture(58, "POLYETHYLEN$", apoly, zpoly, .95, 2, wpoly);
532 //
533 // stainless Steel
534 AliMixture(19, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
535 AliMixture(39, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
536 AliMixture(59, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
537 //
538 // ****************
539 // Defines tracking media parameters.
540 //
541 epsil = .001; // Tracking precision,
542 stemax = -1.; // Maximum displacement for multiple scat
543 tmaxfd = -20.; // Maximum angle due to field deflection
544 deemax = -.3; // Maximum fractional energy loss, DLS
545 stmin = -.8;
546 // ***************
547 //
548 // Carbon
ad51aeb0 549 AliMedium(6, "C_C0 ", 6, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
550 AliMedium(26, "C_C1 ", 26, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
551 AliMedium(46, "C_C2 ", 46, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 552 //
553 // Aluminum
ad51aeb0 554 AliMedium(9, "ALU_C0 ", 9, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
555 AliMedium(29, "ALU_C1 ", 29, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
556 AliMedium(49, "ALU_C2 ", 49, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 557 //
558 // Iron
ad51aeb0 559 AliMedium(10, "FE_C0 ", 10, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
560 AliMedium(30, "FE_C1 ", 30, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
561 AliMedium(50, "FE_C2 ", 50, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 562 //
563 // Tungsten
ad51aeb0 564 AliMedium(12, "W_C0 ", 12, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
565 AliMedium(32, "W_C1 ", 32, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
566 AliMedium(52, "W_C2 ", 52, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 567 //
568 // Lead
ad51aeb0 569 AliMedium(13, "PB_C0 ", 13, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
570 AliMedium(33, "PB_C1 ", 33, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
571 AliMedium(53, "PB_C2 ", 53, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 572 //
573 // Air
ad51aeb0 574 AliMedium(15, "AIR_C0 ", 15, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
575 AliMedium(35, "AIR_C1 ", 35, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
576 AliMedium(55, "AIR_C2 ", 55, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 577 //
578 // Vacuum
ad51aeb0 579 AliMedium(16, "VA_C0 ", 16, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
580 AliMedium(36, "VA_C1 ", 36, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
581 AliMedium(56, "VA_C2 ", 56, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 582 //
583 // Concrete
ad51aeb0 584 AliMedium(17, "CC_C0 ", 17, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
585 AliMedium(37, "CC_C1 ", 37, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
586 AliMedium(57, "CC_C2 ", 57, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 587 //
588 // Polyethilene
ad51aeb0 589 AliMedium(18, "CH2_C0 B ", 18, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
590 AliMedium(38, "CH2_C1 ", 38, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
591 AliMedium(58, "CH2_C2 ", 58, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 592 //
593 // Steel
ad51aeb0 594 AliMedium(19, "ST_C0 ", 19, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
595 AliMedium(39, "ST_C1 ", 39, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
596 AliMedium(59, "ST_C3 ", 59, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
fe4da5cc 597}
598
599//_____________________________________________________________________________
600void AliABSO::Init()
601{
602 //
603 // Initialisation of the muon absorber after it has been built
604 Int_t i;
605 //
606 printf("\n");
607 for(i=0;i<35;i++) printf("*");
608 printf(" ABSO_INIT ");
609 for(i=0;i<35;i++) printf("*");
610 printf("\n");
611 //
612 for(i=0;i<80;i++) printf("*");
613 printf("\n");
614}
615