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[u/mrichter/AliRoot.git] / STRUCT / AliABSOv0.cxx
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43d014f0 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 18Revision 1.3 2000/01/18 17:49:56 morsch
19Serious overlap of ABSM with shield corrected
20Small error in ARPB parameters corrected
21
85d164ab 22Revision 1.2 2000/01/13 11:23:59 morsch
23Last layer of Pb outer angle corrected
24
54fba644 25Revision 1.1 2000/01/12 15:39:30 morsch
26Standar 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
55ClassImp(AliABSOv0)
56
57//_____________________________________________________________________________
58AliABSOv0::AliABSOv0()
59{
60 //
61 // Default constructor
62 //
63}
64
65//_____________________________________________________________________________
66AliABSOv0::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//_____________________________________________________________________________
78void 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);
43d014f0 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);
74c0d076 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
43d014f0 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);
85d164ab 202 pcpar[9] = -pcpar[3];
43d014f0 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;
43d014f0 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;
43d014f0 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);
74c0d076 271 }
272 } // End local scope for i
43d014f0 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
338void 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
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