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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 | $Log$ |
74c0d076 |
18 | Revision 1.3 2000/01/18 17:49:56 morsch |
19 | Serious overlap of ABSM with shield corrected |
20 | Small error in ARPB parameters corrected |
21 | |
85d164ab |
22 | Revision 1.2 2000/01/13 11:23:59 morsch |
23 | Last layer of Pb outer angle corrected |
24 | |
54fba644 |
25 | Revision 1.1 2000/01/12 15:39:30 morsch |
26 | Standar version of ABSO |
27 | |
43d014f0 |
28 | */ |
29 | |
30 | /////////////////////////////////////////////////////////////////////////////// |
31 | // // |
32 | // Muon ABSOrber // |
33 | // This class contains the description of the muon absorber geometry // |
34 | // // |
35 | //Begin_Html |
36 | /* |
37 | <img src="picts/AliABSOClass.gif"> |
38 | </pre> |
39 | <br clear=left> |
40 | <font size=+2 color=red> |
41 | <p>The responsible person for this module is |
42 | <a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>. |
43 | </font> |
44 | <pre> |
45 | */ |
46 | //End_Html |
47 | // // |
48 | // // |
49 | /////////////////////////////////////////////////////////////////////////////// |
50 | |
51 | #include "AliABSOv0.h" |
52 | #include "AliRun.h" |
53 | #include "AliConst.h" |
54 | |
55 | ClassImp(AliABSOv0) |
56 | |
57 | //_____________________________________________________________________________ |
58 | AliABSOv0::AliABSOv0() |
59 | { |
60 | // |
61 | // Default constructor |
62 | // |
63 | } |
64 | |
65 | //_____________________________________________________________________________ |
66 | AliABSOv0::AliABSOv0(const char *name, const char *title) |
67 | : AliABSO(name,title) |
68 | { |
69 | // |
70 | // Standard constructor |
71 | // |
72 | SetMarkerColor(7); |
73 | SetMarkerStyle(2); |
74 | SetMarkerSize(0.4); |
75 | } |
76 | |
77 | //_____________________________________________________________________________ |
78 | void AliABSOv0::CreateGeometry() |
79 | { |
80 | // |
81 | // Creation of the geometry of the muon absorber |
82 | // |
83 | //Begin_Html |
84 | /* |
85 | <img src="picts/AliABSOv0Tree.gif"> |
86 | */ |
87 | //End_Html |
88 | //Begin_Html |
89 | /* |
90 | <img src="picts/AliABSOv0.gif"> |
91 | */ |
92 | //End_Html |
93 | |
94 | |
95 | Int_t *idtmed = fIdtmed->GetArray()-1599; |
96 | |
97 | Float_t par[24], cpar[5], cpar0[5], pcpar[12], tpar[3], tpar0[3]; |
98 | Float_t dz; |
99 | #include "ShieldConst.h" |
100 | // Mother volume and outer shielding: Pb |
101 | |
102 | par[0] = 0.; |
103 | par[1] = 360.; |
104 | par[2] = 7.; |
105 | |
106 | par[3] = -(abs_l-abs_d)/2.; |
107 | par[4] = r_abs; |
108 | par[5] = abs_d * TMath::Tan(theta1); |
109 | |
110 | par[6] = par[3]+(z_nose-abs_d); |
111 | par[7] = r_abs; |
112 | par[8] = z_nose * TMath::Tan(theta1); |
113 | |
114 | par[9] = par[3]+(z_cone-abs_d); |
115 | par[10] = r_abs; |
116 | par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(theta2); |
117 | |
118 | par[12] = par[3]+(abs_c-abs_d); |
119 | par[13] = r_abs; |
120 | par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(acc_max); |
121 | |
122 | par[15] = par[3]+(abs_l-d_rear-abs_d); |
123 | par[16] = r_abs + (par[15] - par[12]) * TMath::Tan(theta_open1) ; |
124 | par[17] = par[14] + (par[15] - par[12]) * TMath::Tan(acc_max); |
125 | |
126 | par[18] = par[3]+(abs_l-d_rear-abs_d); |
127 | par[19] = (abs_l-d_rear) * TMath::Tan(acc_min); |
85d164ab |
128 | par[20] = par[14] + (par[18] - par[12]) * TMath::Tan(acc_max); |
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129 | |
130 | par[21] = -par[3]; |
131 | par[22] = abs_l* TMath::Tan(acc_min); |
132 | par[23] = par[20] + (par[21] - par[18]) * TMath::Tan(acc_max); |
133 | gMC->Gsvolu("ABSS", "PCON", idtmed[1612], par, 24); |
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134 | { // Begin local scope for i |
135 | for (Int_t i=4; i<18; i+=3) par[i] = 0; |
136 | } // End local scope for i |
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137 | gMC->Gsvolu("ABSM", "PCON", idtmed[1655], par, 24); |
138 | gMC->Gspos("ABSS", 1, "ABSM", 0., 0., 0., 0, "ONLY"); |
139 | |
140 | // |
141 | // Steel envelope |
142 | // |
143 | par[4] = par[5] -d_steel; |
144 | par[7] = par[8] -d_steel; |
145 | par[10]= par[11]-d_steel; |
146 | par[13]= par[14]-d_steel; |
147 | par[16]= par[17]-d_steel; |
148 | par[19]= par[20]-d_steel; |
149 | par[22]= par[23]-d_steel; |
150 | gMC->Gsvolu("ABST", "PCON", idtmed[1618], par, 24); |
151 | gMC->Gspos("ABST", 1, "ABSS", 0., 0., 0., 0, "ONLY"); |
152 | // |
153 | // Polyethylene shield |
154 | // |
155 | cpar[0] = (abs_l - z_cone) / 2.; |
156 | cpar[1] = z_cone * TMath::Tan(acc_max); |
157 | cpar[2] = cpar[1] + d_poly; |
158 | cpar[3] = abs_l * TMath::Tan(acc_max); |
159 | cpar[4] = cpar[3] + d_poly; |
160 | gMC->Gsvolu("APOL", "CONE", idtmed[1657], cpar, 5); |
161 | dz = (abs_l-abs_d)/2.-cpar[0]; |
162 | gMC->Gspos("APOL", 1, "ABSS", 0., 0., dz, 0, "ONLY"); |
163 | |
164 | // |
165 | // Tungsten nose to protect TPC |
166 | // |
167 | cpar[0] = (z_nose - abs_d) / 2.; |
168 | cpar[1] = abs_d * TMath::Tan(acc_max); |
169 | cpar[2] = abs_d * TMath::Tan(theta1)-d_steel; |
170 | cpar[3] = z_nose * TMath::Tan(acc_max); |
171 | cpar[4] = z_nose * TMath::Tan(theta1)-d_steel; |
172 | gMC->Gsvolu("ANOS", "CONE", idtmed[1611], cpar, 5); |
173 | // |
174 | dz = -(abs_l-abs_d)/2.+cpar[0]; |
175 | gMC->Gspos("ANOS", 1, "ABSS", 0., 0., dz, 0, "ONLY"); |
176 | // |
177 | // Tungsten inner shield |
178 | // |
179 | cpar[0] = (abs_l-d_rear - abs_c)/ 2.; |
180 | cpar[1] = r_abs; |
181 | cpar[2] = abs_c * TMath::Tan(acc_min); |
182 | cpar[3] = r_abs + 2. * cpar[0] * TMath::Tan(theta_open1); |
183 | cpar[4] = (abs_l-d_rear) * TMath::Tan(acc_min); |
184 | gMC->Gsvolu("AWIN", "CONE", idtmed[1651], cpar, 5); |
185 | // |
186 | dz = (abs_l-abs_d)/2.-cpar[0]-d_rear; |
187 | gMC->Gspos("AWIN", 1, "ABSS", 0., 0., dz, 0, "ONLY"); |
188 | |
189 | // Inner tracking region |
190 | // |
191 | // mother volume: Pb |
192 | // |
193 | pcpar[0] = 0.; |
194 | pcpar[1] = 360.; |
195 | pcpar[2] = 3.; |
196 | pcpar[3] = -(abs_l-abs_d)/2.; |
197 | pcpar[4] = r_abs; |
198 | pcpar[5] = abs_d * TMath::Tan(acc_max); |
199 | pcpar[6] = pcpar[3]+(z_2deg-abs_d); |
200 | pcpar[7] = r_abs; |
201 | pcpar[8] = z_2deg * TMath::Tan(acc_max); |
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202 | pcpar[9] = -pcpar[3]; |
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203 | pcpar[10] = abs_l * TMath::Tan(acc_min); |
204 | pcpar[11] = abs_l * TMath::Tan(acc_max); |
205 | gMC->Gsvolu("AITR", "PCON", idtmed[1612], pcpar, 12); |
206 | // |
207 | // special Pb medium for last 5 cm of Pb |
208 | zr=abs_l-5; |
209 | cpar[0] = 2.5; |
210 | cpar[1] = zr * TMath::Tan(theta_r); |
211 | cpar[2] = zr * TMath::Tan(acc_max); |
85d164ab |
212 | cpar[3] = cpar[1] + TMath::Tan(theta_r) * 5; |
54fba644 |
213 | cpar[4] = cpar[2] + TMath::Tan(acc_max) * 5; |
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214 | gMC->Gsvolu("ARPB", "CONE", idtmed[1632], cpar, 5); |
215 | dz=(abs_l-abs_d)/2.-cpar[0]; |
216 | gMC->Gspos("ARPB", 1, "AITR", 0., 0., dz, 0, "ONLY"); |
217 | |
218 | // |
219 | // concrete cone: concrete |
220 | // |
221 | pcpar[9] = par[3]+(abs_l-d_rear-abs_d); |
222 | pcpar[10] = (abs_l-d_rear) * TMath::Tan(acc_min); |
223 | pcpar[11] = (abs_l-d_rear) * TMath::Tan(acc_max); |
224 | gMC->Gsvolu("ACON", "PCON", idtmed[1616], pcpar, 12); |
225 | gMC->Gspos("ACON", 1, "AITR", 0., 0., 0., 0, "ONLY"); |
226 | // |
227 | // carbon cone: carbon |
228 | // |
229 | pcpar[9] = pcpar[3]+(abs_cc-abs_d); |
230 | pcpar[10] = abs_cc * TMath::Tan(acc_min); |
231 | pcpar[11] = abs_cc * TMath::Tan(acc_max); |
232 | gMC->Gsvolu("ACAR", "PCON", idtmed[1605], pcpar, 12); |
233 | gMC->Gspos("ACAR", 1, "ACON", 0., 0., 0., 0, "ONLY"); |
234 | // |
235 | // inner W shield |
236 | zr=abs_l-d_rear; |
237 | cpar[0] = d_rear/2.; |
238 | cpar[1] = zr * TMath::Tan(acc_min); |
239 | cpar[2] = zr * TMath::Tan(theta_r); |
85d164ab |
240 | cpar[3] = cpar[1] + TMath::Tan(acc_min) * d_rear; |
241 | cpar[4] = cpar[2] + TMath::Tan(theta_r) * d_rear; |
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242 | gMC->Gsvolu("ARW0", "CONE", idtmed[1611], cpar, 5); |
243 | dz=(abs_l-abs_d)/2.-cpar[0]; |
244 | gMC->Gspos("ARW0", 1, "AITR", 0., 0., dz, 0, "ONLY"); |
245 | // |
246 | // special W medium for last 5 cm of W |
247 | zr=abs_l-5; |
248 | cpar[0] = 2.5; |
249 | cpar[1] = zr * TMath::Tan(acc_min); |
250 | cpar[2] = zr * TMath::Tan(theta_r); |
251 | cpar[3] = cpar[1] + TMath::Tan(acc_min) * 5.; |
252 | cpar[4] = cpar[2] + TMath::Tan(theta_r) * 5.; |
253 | gMC->Gsvolu("ARW1", "CONE", idtmed[1631], cpar, 5); |
254 | dz=d_rear/2.-cpar[0]; |
255 | gMC->Gspos("ARW1", 1, "ARW0", 0., 0., dz, 0, "ONLY"); |
256 | // |
257 | // PolyEthylene Layers |
258 | Float_t dr_min=TMath::Tan(theta_r) * 5; |
259 | Float_t dr_max=TMath::Tan(acc_max) * 5; |
260 | gMC->Gsvolu("ARPE", "CONE", idtmed[1617], cpar, 0); |
261 | cpar[0]=2.5; |
74c0d076 |
262 | { // Begin local scope for i |
263 | for (Int_t i=0; i<3; i++) { |
43d014f0 |
264 | zr=abs_l-d_rear+5+i*10.; |
265 | cpar[1] = zr * TMath::Tan(theta_r); |
266 | cpar[2] = zr * TMath::Tan(acc_max); |
267 | cpar[3] = cpar[1] + dr_min; |
268 | cpar[4] = cpar[2] + dr_max; |
269 | dz=(abs_l-abs_d)/2.-cpar[0]-5.-(2-i)*10; |
270 | gMC->Gsposp("ARPE", i+1, "AITR", 0., 0., dz, 0, "ONLY",cpar,5); |
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271 | } |
272 | } // End local scope for i |
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273 | gMC->Gspos("AITR", 1, "ABSS", 0., 0., 0., 0, "ONLY"); |
274 | dz = (abs_l-abs_d)/2.+abs_d; |
275 | gMC->Gspos("ABSM", 1, "ALIC", 0., 0., dz, 0, "ONLY"); |
276 | // |
277 | // |
278 | // vacuum system |
279 | // |
280 | // pipe and heating jackets |
281 | // |
282 | // |
283 | // cylindrical piece |
284 | tpar0[2]=(abs_c-abs_d)/2; |
285 | tpar0[0]=r_vacu; |
286 | tpar0[1]=r_abs; |
287 | gMC->Gsvolu("AV11", "TUBE", idtmed[1658], tpar0, 3); |
288 | // |
289 | // insulation |
290 | tpar[2]=tpar0[2]; |
291 | tpar[0]=tpar0[0]+d_tube; |
292 | tpar[1]=tpar0[0]+d_tube+d_insu; |
293 | gMC->Gsvolu("AI11", "TUBE", idtmed[1653], tpar, 3); |
294 | gMC->Gspos("AI11", 1, "AV11", 0., 0., 0., 0, "ONLY"); |
295 | // |
296 | // clearance |
297 | tpar[0]=tpar0[1]-d_prot-d_free; |
298 | tpar[1]=tpar0[1]-d_prot; |
299 | gMC->Gsvolu("AP11", "TUBE", idtmed[1655], tpar, 3); |
300 | gMC->Gspos("AP11", 1, "AV11", 0., 0., 0., 0, "ONLY"); |
301 | |
302 | dz=-(abs_l-abs_d)/2.+tpar0[2]; |
303 | gMC->Gspos("AV11", 1, "ABSM", 0., 0., dz, 0, "ONLY"); |
304 | |
305 | // |
306 | // conical piece |
307 | cpar0[0]=(abs_l-d_rear-abs_c)/2; |
308 | cpar0[1]=r_vacu; |
309 | cpar0[2]=r_abs; |
310 | cpar0[3]=cpar0[1]+2.*cpar0[0]*TMath::Tan(theta_open1); |
311 | cpar0[4]=cpar0[2]+2.*cpar0[0]*TMath::Tan(theta_open1); |
312 | gMC->Gsvolu("AV21", "CONE", idtmed[1658], cpar0, 5); |
313 | // |
314 | // insulation |
315 | cpar[0]=cpar0[0]; |
316 | cpar[1]=cpar0[1]+d_tube; |
317 | cpar[2]=cpar0[1]+d_tube+d_insu; |
318 | cpar[3]=cpar0[3]+d_tube; |
319 | cpar[4]=cpar0[3]+d_tube+d_insu; |
320 | gMC->Gsvolu("AI21", "CONE", idtmed[1653], cpar, 5); |
321 | gMC->Gspos("AI21", 1, "AV21", 0., 0., 0., 0, "ONLY"); |
322 | // |
323 | // clearance |
324 | cpar[1]=cpar0[2]-d_prot-d_free; |
325 | cpar[2]=cpar0[2]-d_prot; |
326 | cpar[3]=cpar0[4]-d_prot-d_free; |
327 | cpar[4]=cpar0[4]-d_prot; |
328 | gMC->Gsvolu("AP21", "CONE", idtmed[1655], cpar, 5); |
329 | gMC->Gspos("AP21", 1, "AV21", 0., 0., 0., 0, "ONLY"); |
330 | |
331 | dz=(abs_l-abs_d)/2.-cpar0[0]-d_rear; |
332 | gMC->Gspos("AV21", 1, "ABSM", 0., 0., dz, 0, "ONLY"); |
333 | |
334 | } |
335 | |
336 | //_____________________________________________________________________________ |
337 | |
338 | void AliABSOv0::Init() |
339 | { |
340 | // |
341 | // Initialisation of the muon absorber after it has been built |
342 | Int_t i; |
343 | // |
344 | printf("\n"); |
345 | for(i=0;i<35;i++) printf("*"); |
346 | printf(" ABSOv0_INIT "); |
347 | for(i=0;i<35;i++) printf("*"); |
348 | printf("\n"); |
349 | // |
350 | for(i=0;i<80;i++) printf("*"); |
351 | printf("\n"); |
352 | } |
353 | |
354 | |
355 | |
356 | |
357 | |
358 | |
359 | |
360 | |
361 | |
362 | |