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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 | $Log$ | |
73042f01 | 18 | Revision 1.13.2.4 2000/06/26 07:39:42 kowal2 |
19 | Changes to obey the coding rules | |
20 | ||
21 | Revision 1.13.2.3 2000/06/25 08:38:41 kowal2 | |
22 | Splitted from AliTPCtracking | |
23 | ||
24 | Revision 1.13.2.2 2000/06/16 12:58:13 kowal2 | |
25 | Changed parameter settings | |
26 | ||
27 | Revision 1.13.2.1 2000/06/09 07:15:07 kowal2 | |
28 | ||
29 | Defaults loaded automatically (hard-wired) | |
30 | Optional parameters can be set via macro called in the constructor | |
31 | ||
32 | Revision 1.13 2000/05/15 10:00:30 kowal2 | |
33 | Corrected bug in the TPC geometry, thanks to Ivana Hrivnacova | |
34 | ||
e94dd9ca | 35 | Revision 1.12 2000/04/17 09:37:33 kowal2 |
36 | removed obsolete AliTPCDigitsDisplay.C | |
37 | ||
cc80f89e | 38 | Revision 1.11.8.2 2000/04/10 08:36:12 kowal2 |
39 | ||
40 | Updated readout chambers | |
41 | Some modifications to StepManager by M. Kowalski | |
42 | ||
43 | Revision 1.11.8.1 2000/04/10 07:56:53 kowal2 | |
44 | Not used anymore - removed | |
45 | ||
46 | Revision 1.11 1999/11/04 17:28:07 fca | |
47 | Correct barrel part of HV Degrader | |
48 | ||
a5371c42 | 49 | Revision 1.10 1999/10/14 16:52:08 fca |
50 | Only use PDG codes and not GEANT ones | |
51 | ||
69e40cce | 52 | Revision 1.9 1999/10/08 06:27:23 fca |
53 | Corrected bug in the HV degrader geometry, thanks to G.Tabary | |
54 | ||
d183a600 | 55 | Revision 1.8 1999/10/04 13:39:55 fca |
56 | Correct array index problem | |
57 | ||
cdde5b1e | 58 | Revision 1.7 1999/09/29 09:24:34 fca |
59 | Introduction of the Copyright and cvs Log | |
60 | ||
4c039060 | 61 | */ |
62 | ||
73042f01 | 63 | // |
4b0fdcad | 64 | /////////////////////////////////////////////////////////////////////////////// |
65 | // // | |
66 | // Time Projection Chamber version 3 -- detailed TPC and slow simulation // | |
67 | // // | |
68 | //Begin_Html | |
69 | /* | |
70 | <img src="picts/AliTPCv3Class.gif"> | |
71 | */ | |
72 | //End_Html | |
73 | // // | |
74 | // // | |
75 | /////////////////////////////////////////////////////////////////////////////// | |
76 | ||
77 | #include <stdlib.h> | |
78 | #include <TMath.h> | |
4b0fdcad | 79 | #include "AliTPCv3.h" |
80 | #include "AliRun.h" | |
81 | #include "AliConst.h" | |
cc80f89e | 82 | #include "AliTPCDigitsArray.h" |
83 | #include"AliTPCParam.h" | |
73042f01 | 84 | #include"AliTPCParamSR.h" |
69e40cce | 85 | #include "AliPDG.h" |
73042f01 | 86 | #include <TInterpreter.h> |
4b0fdcad | 87 | |
88 | ClassImp(AliTPCv3) | |
89 | ||
90 | //_____________________________________________________________________________ | |
91 | AliTPCv3::AliTPCv3(const char *name, const char *title) : | |
92 | AliTPC(name, title) | |
93 | { | |
94 | // | |
cc80f89e | 95 | // Standard constructor for Time Projection Chamber version 3 |
4b0fdcad | 96 | // |
97 | ||
98 | SetBufferSize(128000); | |
73042f01 | 99 | |
100 | SetGasMixt(2,20,10,-1,0.9,0.1,0.); | |
101 | ||
102 | if (fTPCParam) | |
103 | fTPCParam->Write(fTPCParam->GetTitle()); | |
4b0fdcad | 104 | } |
105 | ||
106 | //_____________________________________________________________________________ | |
107 | void AliTPCv3::CreateGeometry() | |
108 | { | |
109 | // | |
cc80f89e | 110 | // Creation of the TPC coarse geometry (version 3) |
111 | // Origin Marek Kowalski Cracow | |
4b0fdcad | 112 | // |
113 | //Begin_Html | |
114 | /* | |
1283eee5 | 115 | <img src="picts/AliTPCv0.gif"> |
4b0fdcad | 116 | */ |
117 | //End_Html | |
118 | //Begin_Html | |
119 | /* | |
1283eee5 | 120 | <img src="picts/AliTPCv0Tree.gif"> |
4b0fdcad | 121 | */ |
122 | //End_Html | |
123 | ||
1283eee5 | 124 | Int_t *idtmed = fIdtmed->GetArray(); |
125 | ||
126 | Float_t dm[21]; | |
62a73ee5 | 127 | Int_t idrotm[120]; |
1283eee5 | 128 | |
129 | Int_t nRotMat = 0; | |
130 | ||
131 | ||
4b0fdcad | 132 | // ---------------------------------------------------- |
1283eee5 | 133 | // FIELD CAGE WITH ENDCAPS - G10 |
4b0fdcad | 134 | // THIS IS ALSO A TPC MOTHER VOLUME |
135 | // ---------------------------------------------------- | |
1283eee5 | 136 | |
4b0fdcad | 137 | dm[0] = 76.; |
138 | dm[1] = 278.; | |
139 | dm[2] = 275.; | |
1283eee5 | 140 | |
141 | gMC->Gsvolu("TPC ", "TUBE", idtmed[8], dm, 3); | |
142 | ||
143 | //----------------------------------------------------- | |
144 | // Endcap cover c-fibre 0.86% X0 | |
145 | //----------------------------------------------------- | |
146 | ||
147 | dm[0] = 78.; | |
148 | dm[1] = 258.; | |
149 | dm[2] = 0.95; | |
150 | ||
151 | gMC->Gsvolu("TPEC","TUBE",idtmed[10],dm,3); | |
152 | ||
153 | //----------------------------------------------------- | |
154 | // Drift gas , leave 2 cm at the outer radius | |
155 | // and inner raddius | |
156 | //----------------------------------------------------- | |
157 | ||
158 | dm[0] = 78.; | |
159 | dm[1] = 258.; | |
4b0fdcad | 160 | dm[2] = 250.; |
161 | ||
1283eee5 | 162 | gMC->Gsvolu("TGAS", "TUBE", idtmed[4], dm, 3); |
163 | ||
4b0fdcad | 164 | |
1283eee5 | 165 | //------------------------------------------------------ |
166 | // membrane holder - carbon fiber | |
167 | //------------------------------------------------------ | |
168 | ||
169 | ||
170 | gMC->Gsvolu("TPMH","TUBE",idtmed[6],dm,0); | |
171 | ||
172 | dm[0] = 252.; | |
173 | dm[1] = 258.; | |
174 | dm[2] = 0.2; | |
175 | ||
176 | gMC->Gsposp("TPMH",1,"TGAS",0.,0.,0.,0,"ONLY",dm,3); | |
177 | ||
178 | dm[0] = 78.; | |
cdde5b1e | 179 | dm[1] = 82.; |
1283eee5 | 180 | dm[2] = 0.1; |
181 | ||
182 | gMC->Gsposp("TPMH",2,"TGAS",0.,0.,0.,0,"ONLY",dm,3); | |
183 | ||
184 | //---------------------------------------------------------- | |
185 | // HV membrane - 25 microns of mylar | |
186 | //---------------------------------------------------------- | |
187 | ||
188 | dm[0] = 82.; | |
189 | dm[1] = 252.; | |
190 | dm[2] = 0.00125; | |
191 | ||
192 | gMC->Gsvolu("TPHV","TUBE",idtmed[5],dm,3); | |
193 | ||
194 | gMC->Gspos("TPHV",1,"TGAS",0.,0.,0.,0,"ONLY"); | |
195 | ||
196 | gMC->Gspos("TGAS",1,"TPC ",0.,0.,0.,0,"ONLY"); | |
197 | ||
198 | //---------------------------------------------------------- | |
199 | // "side" gas volume, the same as the drift gas | |
200 | // the readout chambers are placed there. | |
201 | //---------------------------------------------------------- | |
202 | ||
203 | dm[0] = 78.; | |
204 | dm[1] = 258.; | |
205 | dm[2] = 0.5*(275. - 250.); | |
206 | ||
207 | gMC->Gsvolu("TPSG", "TUBE", idtmed[2], dm, 3); | |
208 | ||
73042f01 | 209 | Float_t zSide = dm[2]; // 1/2 of the side gas thickness |
1283eee5 | 210 | |
211 | //----------------------------------------------------------- | |
212 | // Readout chambers , 25% of X0, I use Al as the material | |
213 | //----------------------------------------------------------- | |
214 | ||
73042f01 | 215 | Float_t innerOpenAngle = fTPCParam->GetInnerAngle(); |
216 | Float_t outerOpenAngle = fTPCParam->GetOuterAngle(); | |
1283eee5 | 217 | |
73042f01 | 218 | Float_t innerAngleShift = fTPCParam->GetInnerAngleShift(); |
219 | Float_t outerAngleShift = fTPCParam->GetOuterAngleShift(); | |
1283eee5 | 220 | |
221 | ||
222 | Int_t nInnerSector = fTPCParam->GetNInnerSector()/2; | |
223 | Int_t nOuterSector = fTPCParam->GetNOuterSector()/2; | |
224 | ||
225 | ||
73042f01 | 226 | Float_t inSecLowEdge = fTPCParam->GetInnerRadiusLow(); |
227 | Float_t inSecUpEdge = fTPCParam->GetInnerRadiusUp(); | |
1283eee5 | 228 | |
73042f01 | 229 | Float_t ouSecLowEdge = fTPCParam->GetOuterRadiusLow(); |
230 | Float_t ouSecUpEdge = fTPCParam->GetOuterRadiusUp(); | |
1283eee5 | 231 | |
73042f01 | 232 | Float_t secThick = 2.225; // Al |
1283eee5 | 233 | |
73042f01 | 234 | Float_t lowEdge = fTPCParam->GetInnerFrameSpace(); |
1283eee5 | 235 | |
236 | // S (Inner) sectors | |
237 | ||
73042f01 | 238 | dm[0] = inSecLowEdge*TMath::Tan(0.5*innerOpenAngle)-lowEdge; |
239 | dm[1] = inSecUpEdge*TMath::Tan(0.5*innerOpenAngle)-lowEdge; | |
240 | dm[2] = secThick; | |
241 | dm[3] = 0.5*(inSecUpEdge-inSecLowEdge); | |
1283eee5 | 242 | |
73042f01 | 243 | Float_t xCenterS = inSecLowEdge+dm[3]; |
1283eee5 | 244 | |
245 | gMC->Gsvolu("TRCS", "TRD1", idtmed[0], dm, 4); | |
246 | ||
247 | // L (Outer) sectors | |
248 | ||
73042f01 | 249 | Float_t upEdge = fTPCParam->GetOuterFrameSpace(); |
cc80f89e | 250 | |
73042f01 | 251 | dm[0] = ouSecLowEdge*TMath::Tan(0.5*outerOpenAngle)-upEdge; |
252 | dm[1] = ouSecUpEdge*TMath::Tan(0.5*outerOpenAngle)-upEdge; | |
253 | dm[2] = secThick; | |
254 | dm[3] = 0.5*(ouSecUpEdge-ouSecLowEdge); | |
1283eee5 | 255 | |
73042f01 | 256 | Float_t xCenterL = ouSecLowEdge+dm[3]; |
1283eee5 | 257 | |
258 | gMC->Gsvolu("TRCL", "TRD1", idtmed[0], dm, 4); | |
259 | ||
73042f01 | 260 | Float_t z1 = -zSide + secThick*0.5; |
1283eee5 | 261 | |
262 | //------------------------------------------------------------------ | |
263 | // Positioning of the S-sector readout chambers | |
264 | //------------------------------------------------------------------ | |
265 | ||
266 | Int_t ns; | |
267 | Float_t theta1,theta2,theta3; | |
268 | Float_t phi1,phi2,phi3; | |
269 | Float_t alpha; | |
270 | Float_t x,y; | |
271 | ||
272 | for(ns=0;ns<nInnerSector;ns++){ | |
273 | ||
73042f01 | 274 | phi1 = ns * innerOpenAngle + 270.*kDegrad + innerAngleShift; |
1283eee5 | 275 | phi1 *= kRaddeg; // in degrees |
276 | ||
277 | phi1 = (Float_t)TMath::Nint(phi1); | |
278 | ||
279 | if (phi1 > 360.) phi1 -= 360.; | |
280 | ||
4b0fdcad | 281 | theta1 = 90.; |
282 | phi2 = 90.; | |
283 | theta2 = 180.; | |
73042f01 | 284 | phi3 = ns * innerOpenAngle + innerAngleShift; |
1283eee5 | 285 | phi3 *= kRaddeg; // in degrees |
286 | ||
287 | phi3 = (Float_t)TMath::Nint(phi3); | |
288 | ||
289 | if(phi3 > 360.) phi3 -= 360.; | |
290 | ||
4b0fdcad | 291 | theta3 = 90.; |
1283eee5 | 292 | |
293 | alpha = phi3*kDegrad; | |
294 | ||
295 | x = xCenterS * TMath::Cos(alpha); | |
296 | y = xCenterS * TMath::Sin(alpha); | |
297 | ||
298 | AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3); | |
299 | ||
300 | gMC->Gspos("TRCS", ns+1, "TPSG", x, y, z1, idrotm[nRotMat], "ONLY"); | |
301 | ||
302 | nRotMat++; | |
303 | ||
304 | } | |
4b0fdcad | 305 | |
1283eee5 | 306 | //------------------------------------------------------------------- |
307 | // Positioning of the L-sectors readout chambers | |
308 | //------------------------------------------------------------------- | |
4b0fdcad | 309 | |
1283eee5 | 310 | for(ns=0;ns<nOuterSector;ns++){ |
73042f01 | 311 | phi1 = ns * outerOpenAngle + 270.*kDegrad + outerAngleShift; |
1283eee5 | 312 | phi1 *= kRaddeg; // in degrees |
313 | ||
314 | phi1 = (Float_t)TMath::Nint(phi1); | |
4b0fdcad | 315 | |
1283eee5 | 316 | |
317 | if (phi1 > 360.) phi1 -= 360.; | |
318 | ||
4b0fdcad | 319 | theta1 = 90.; |
320 | phi2 = 90.; | |
321 | theta2 = 180.; | |
73042f01 | 322 | phi3 = ns * outerOpenAngle+outerAngleShift; |
1283eee5 | 323 | phi3 *= kRaddeg; // in degrees |
324 | ||
325 | phi3 = (Float_t)TMath::Nint(phi3); | |
326 | ||
327 | ||
328 | if(phi3 > 360.) phi3 -= 360.; | |
329 | ||
4b0fdcad | 330 | theta3 = 90.; |
1283eee5 | 331 | |
332 | alpha = phi3*kDegrad; | |
333 | ||
334 | x = xCenterL * TMath::Cos(alpha); | |
335 | y = xCenterL * TMath::Sin(alpha); | |
336 | ||
337 | AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3); | |
338 | ||
339 | ||
340 | gMC->Gspos("TRCL", ns+1, "TPSG", x, y, z1, idrotm[nRotMat], "ONLY"); | |
341 | ||
342 | nRotMat++; | |
343 | ||
4b0fdcad | 344 | } |
1283eee5 | 345 | |
73042f01 | 346 | Float_t z0 = zSide - 0.95; |
1283eee5 | 347 | |
348 | gMC->Gspos("TPEC",1,"TPSG",0.,0.,z0,0,"ONLY"); | |
349 | ||
4b0fdcad | 350 | // ========================================================== |
351 | // wheels | |
352 | // ========================================================== | |
1283eee5 | 353 | |
354 | // | |
355 | // auxilary structures | |
356 | // | |
357 | ||
358 | ||
359 | gMC->Gsvolu("TPWI","TUBE",idtmed[24],dm,0); // "air" | |
360 | ||
4b0fdcad | 361 | // ---------------------------------------------------------- |
362 | // Large wheel -> positioned in the TPC | |
363 | // ---------------------------------------------------------- | |
1283eee5 | 364 | |
365 | ||
366 | z0 = 263.5; // TPC length - 1/2 spoke wheel width | |
367 | ||
368 | dm[0] = 258.; | |
4b0fdcad | 369 | dm[1] = 278.; |
370 | dm[2] = 11.5; | |
4b0fdcad | 371 | |
1283eee5 | 372 | gMC->Gsvolu("TPWL", "TUBE", idtmed[0], dm, 3); |
373 | ||
374 | dm[0] = dm[0]+2.; | |
375 | dm[1] = 278.; | |
376 | dm[2] = dm[2]-2.; | |
377 | ||
378 | gMC->Gsposp("TPWI",1,"TPWL",0.,0.,0.,0,"ONLY",dm,3); | |
379 | ||
380 | gMC->Gspos("TPWL", 1, "TPC ", 0, 0, z0, 0, "ONLY"); | |
381 | gMC->Gspos("TPWL", 2, "TPC ", 0, 0, -z0, 0, "ONLY"); | |
382 | ||
383 | // | |
384 | // Outer vessel + CO2 HV degrader | |
385 | // | |
386 | ||
387 | dm[0] = 260.; | |
388 | dm[1] = 278.; | |
389 | dm[2] = 252.; | |
390 | ||
391 | gMC->Gsvolu("TPCO","TUBE",idtmed[12],dm,3); | |
392 | ||
393 | dm[0] = 275.; | |
4b0fdcad | 394 | dm[1] = 278.; |
4b0fdcad | 395 | |
1283eee5 | 396 | gMC->Gsvolu("TPOV","TUBE",idtmed[10],dm,3); |
397 | ||
398 | gMC->Gspos("TPOV",1,"TPCO",0.,0.,0.,0,"ONLY"); | |
399 | ||
400 | ||
1283eee5 | 401 | |
402 | gMC->Gspos("TPCO",1,"TPC ",0.,0.,0.,0,"ONLY"); | |
403 | ||
404 | ||
405 | //---------------------------------------------------------- | |
406 | // Small wheel -> positioned in "side gas | |
407 | //---------------------------------------------------------- | |
408 | ||
409 | dm[0] = 78.; | |
4b0fdcad | 410 | dm[1] = 82.; |
411 | dm[2] = 11.5; | |
1283eee5 | 412 | |
413 | gMC->Gsvolu("TPWS", "TUBE", idtmed[0], dm, 3); | |
414 | ||
415 | dm[0] = 78.; | |
416 | dm[1] = dm[1]-2; | |
417 | dm[2] = dm[2]-2.; | |
418 | ||
419 | gMC->Gsvolu("TPW1", "TUBE", idtmed[2], dm, 3); | |
4b0fdcad | 420 | |
1283eee5 | 421 | gMC->Gspos("TPW1", 1, "TPWS", 0., 0., 0., 0, "ONLY"); |
422 | ||
423 | z0 = 1.; // spoke wheel is shifted w.r.t. center of the "side gas" | |
424 | ||
425 | gMC->Gspos("TPWS", 1, "TPSG", 0, 0, z0, 0, "ONLY"); | |
426 | ||
427 | ||
428 | // to avoid overlaps | |
429 | ||
430 | dm[0] = 76.; | |
431 | dm[1] = 78.; | |
432 | dm[2] = 11.5; | |
433 | ||
434 | gMC->Gsvolu("TPS1","TUBE",idtmed[0],dm,3); | |
435 | ||
4b0fdcad | 436 | dm[2] = 9.5; |
1283eee5 | 437 | |
438 | gMC->Gsvolu("TPS2","TUBE",idtmed[24],dm,3); | |
439 | ||
440 | gMC->Gspos("TPS2",1,"TPS1",0.,0.,0.,0,"ONLY"); | |
441 | ||
442 | z0= 263.5; | |
4b0fdcad | 443 | |
1283eee5 | 444 | gMC->Gspos("TPS1",1,"TPC ",0.,0.,z0,0,"ONLY"); |
445 | gMC->Gspos("TPS1",2,"TPC ",0.,0.,-z0,0,"ONLY"); | |
446 | ||
447 | // G10 plug | |
448 | ||
449 | dm[0] = 76.; | |
7d7bb9e5 | 450 | dm[1] = 78.; |
451 | dm[2] = 1.; | |
1283eee5 | 452 | |
453 | gMC->Gsvolu("TPG2","TUBE",idtmed[8],dm,3); | |
454 | ||
455 | z0 = 251.; | |
456 | ||
457 | gMC->Gspos("TPG2",1,"TPC ",0.,0.,z0,0,"ONLY"); | |
458 | gMC->Gspos("TPG2",2,"TPC ",0.,0.,-z0,0,"ONLY"); | |
459 | ||
460 | ||
461 | //--------------------------------------------------------- | |
462 | // central wheel 6 (radial direction) x 4 (along z) cm2 | |
463 | //--------------------------------------------------------- | |
464 | ||
465 | dm[0] = 140.; | |
466 | dm[1] = 146.; | |
4b0fdcad | 467 | dm[2] = 2.; |
4b0fdcad | 468 | |
1283eee5 | 469 | gMC->Gsvolu("TPWC","TUBE",idtmed[0],dm,3); |
470 | ||
471 | dm[0] = dm[0] + 2.; | |
472 | dm[1] = dm[1] - 2.; | |
473 | dm[2] = dm[2] - 1.; | |
474 | ||
475 | gMC->Gsposp("TPWI",2,"TPWC",0.,0.,0.,0,"ONLY",dm,3); | |
476 | ||
73042f01 | 477 | z0 = zSide - 1.9 - 2.; |
1283eee5 | 478 | |
479 | gMC->Gspos("TPWC",1,"TPSG",0.,0.,z0,0,"ONLY"); | |
480 | ||
481 | // | |
482 | ||
483 | gMC->Gsvolu("TPSE","BOX ",idtmed[24],dm,0); // "empty" part of the spoke | |
484 | ||
485 | ||
486 | //--------------------------------------------------------- | |
487 | // inner spokes (nSectorInner) | |
488 | //--------------------------------------------------------- | |
489 | ||
490 | dm[0] = 0.5*(139.9-82.1); | |
4b0fdcad | 491 | dm[1] = 3.; |
492 | dm[2] = 2.; | |
1283eee5 | 493 | |
494 | Float_t x1 = dm[0]+82.; | |
495 | ||
496 | gMC->Gsvolu("TPSI","BOX",idtmed[0],dm,3); | |
497 | ||
498 | dm[1] = dm[1]-1.; | |
499 | dm[2] = dm[2]-1.; | |
500 | ||
501 | gMC->Gsposp("TPSE",1,"TPSI",0.,0.,0.,0,"ONLY",dm,3); | |
502 | ||
503 | for(ns=0;ns<nInnerSector;ns++){ | |
504 | ||
73042f01 | 505 | phi1 = 0.5*innerOpenAngle + ns*innerOpenAngle + innerAngleShift; |
1283eee5 | 506 | theta1=90.; |
507 | phi1 *=kRaddeg; | |
508 | ||
509 | phi1 = (Float_t)TMath::Nint(phi1); | |
510 | ||
511 | phi2 = phi1+90.; | |
512 | if(phi2>360.) phi2 -= 360.; | |
513 | theta2=90.; | |
514 | phi3=0.; | |
515 | theta3=0.; | |
516 | ||
4b0fdcad | 517 | alpha = phi1 * kDegrad; |
518 | x = x1 * TMath::Cos(alpha); | |
1283eee5 | 519 | y = x1 * TMath::Sin(alpha); |
520 | ||
521 | AliMatrix(idrotm[nRotMat],theta1,phi1,theta2,phi2,theta3,phi3); | |
522 | ||
523 | gMC->Gspos("TPSI",ns+1,"TPSG",x,y,z0,idrotm[nRotMat],"ONLY"); | |
524 | ||
525 | nRotMat++; | |
526 | ||
4b0fdcad | 527 | } |
1283eee5 | 528 | |
529 | //------------------------------------------------------------- | |
530 | // outer spokes (nSectorOuter) | |
531 | //------------------------------------------------------------- | |
532 | ||
533 | dm[0] = 0.5*(257.9-146.1); | |
534 | dm[1] = 3.; | |
535 | dm[2] = 2.; | |
536 | ||
537 | x1 = dm[0] + 146.; | |
538 | ||
539 | gMC->Gsvolu("TPSO","BOX ",idtmed[0],dm,3); | |
540 | ||
541 | dm[1] = dm[1] - 1.; | |
542 | dm[2] = dm[2] - 1.; | |
543 | ||
544 | gMC->Gsposp("TPSE",2,"TPSO",0.,0.,0.,0,"ONLY",dm,3); | |
545 | ||
546 | for(ns=0;ns<nOuterSector;ns++){ | |
547 | ||
73042f01 | 548 | phi1 = 0.5*outerOpenAngle + ns*outerOpenAngle + outerAngleShift; |
1283eee5 | 549 | theta1=90.; |
550 | phi1 *=kRaddeg; | |
551 | ||
552 | phi1 = (Float_t)TMath::Nint(phi1); | |
553 | ||
554 | phi2 = phi1+90.; | |
555 | if(phi2>360.) phi2 -= 360.; | |
556 | theta2=90.; | |
557 | phi3=0.; | |
558 | theta3=0.; | |
559 | ||
4b0fdcad | 560 | alpha = phi1 * kDegrad; |
1283eee5 | 561 | x = x1 * TMath::Cos(alpha); |
562 | y = x1 * TMath::Sin(alpha); | |
563 | ||
564 | AliMatrix(idrotm[nRotMat],theta1,phi1,theta2,phi2,theta3,phi3); | |
565 | ||
566 | gMC->Gspos("TPSO",ns+1,"TPSG",x,y,z0,idrotm[nRotMat],"ONLY"); | |
567 | ||
568 | nRotMat++; | |
569 | ||
570 | } | |
4b0fdcad | 571 | |
1283eee5 | 572 | |
4b0fdcad | 573 | |
4b0fdcad | 574 | // -------------------------------------------------------- |
575 | // put the readout chambers into the TPC | |
576 | // -------------------------------------------------------- | |
1283eee5 | 577 | |
4b0fdcad | 578 | theta1 = 90.; |
579 | phi1 = 0.; | |
580 | theta2 = 90.; | |
581 | phi2 = 270.; | |
582 | theta3 = 180.; | |
583 | phi3 = 0.; | |
584 | ||
1283eee5 | 585 | AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3); |
4b0fdcad | 586 | |
73042f01 | 587 | z0 = zSide + 250.; |
4b0fdcad | 588 | |
589 | gMC->Gspos("TPSG", 1, "TPC ", 0, 0, z0, 0, "ONLY"); | |
1283eee5 | 590 | gMC->Gspos("TPSG", 2, "TPC ", 0, 0, -z0, idrotm[nRotMat], "ONLY"); |
4b0fdcad | 591 | |
592 | gMC->Gspos("TPC ", 1, "ALIC", 0, 0, 0, 0, "ONLY"); | |
1283eee5 | 593 | |
594 | //---------------------------------------------------- | |
595 | // Inner vessel and HV degrader | |
596 | //---------------------------------------------------- | |
597 | ||
4b0fdcad | 598 | dm[0] = 0.; |
599 | dm[1] = 360.; | |
600 | dm[2] = 4.; | |
601 | ||
602 | dm[3] = -250.; | |
1283eee5 | 603 | dm[4] = 74.4; |
4b0fdcad | 604 | dm[5] = 76.; |
1283eee5 | 605 | |
4b0fdcad | 606 | dm[6] = -64.5; |
607 | dm[7] = 50.; | |
608 | dm[8] = 76.; | |
1283eee5 | 609 | |
d183a600 | 610 | dm[9] = 64.5; |
4b0fdcad | 611 | dm[10] = 50.; |
612 | dm[11] = 76.; | |
1283eee5 | 613 | |
4b0fdcad | 614 | dm[12] = 250.; |
1283eee5 | 615 | dm[13] = 74.4; |
4b0fdcad | 616 | dm[14] = 76.; |
1283eee5 | 617 | |
618 | gMC->Gsvolu("TPVD", "PCON", idtmed[12], dm, 15); // CO2 | |
619 | ||
620 | // cone parts | |
621 | ||
4b0fdcad | 622 | dm[0] = 0.; |
623 | dm[1] = 360.; | |
1283eee5 | 624 | dm[2] = 2.; |
625 | ||
626 | dm[3] = 64.5; | |
627 | dm[4] = 50.; | |
628 | dm[5] = 51.6; | |
629 | ||
630 | dm[6] = 250.; | |
631 | dm[7] = 74.4; | |
632 | dm[8] = 76.; | |
633 | ||
634 | ||
635 | gMC->Gsvolu("TIVC","PCON",idtmed[11],dm,9); // C-fibre | |
636 | ||
637 | gMC->Gspos("TIVC",1,"TPVD",0.,0.,0.,0,"ONLY"); | |
638 | gMC->Gspos("TIVC",2,"TPVD",0.,0.,0.,idrotm[nRotMat],"ONLY"); | |
639 | ||
640 | // barrel part | |
641 | ||
642 | dm[0] = 50.; | |
643 | dm[1] = 50.5; | |
a5371c42 | 644 | dm[2] = 64.5; |
1283eee5 | 645 | |
646 | gMC->Gsvolu("TIVB","TUBE",idtmed[9],dm,3); | |
647 | ||
648 | gMC->Gspos("TIVB",1,"TPVD",0.,0.,0.,0,"ONLY"); | |
649 | ||
650 | gMC->Gspos("TPVD",1,"ALIC",0.,0.,0.,0,"ONLY"); | |
651 | ||
4b0fdcad | 652 | |
1283eee5 | 653 | |
4b0fdcad | 654 | |
1283eee5 | 655 | |
4b0fdcad | 656 | // --------------------------------------------------- |
657 | // volumes ordering | |
658 | // --------------------------------------------------- | |
659 | gMC->Gsord("TPSG", 6); | |
1283eee5 | 660 | |
661 | } // end of function | |
662 | ||
4b0fdcad | 663 | |
664 | ||
665 | //_____________________________________________________________________________ | |
666 | void AliTPCv3::DrawDetector() | |
667 | { | |
668 | // | |
669 | // Draw a shaded view of the Time Projection Chamber version 1 | |
670 | // | |
671 | ||
672 | ||
673 | // Set everything unseen | |
674 | gMC->Gsatt("*", "seen", -1); | |
675 | // | |
676 | // Set ALIC mother transparent | |
677 | gMC->Gsatt("ALIC","SEEN",0); | |
678 | // | |
679 | // Set the volumes visible | |
680 | gMC->Gsatt("TPC","SEEN",0); | |
681 | gMC->Gsatt("TGAS","SEEN",0); | |
682 | gMC->Gsatt("TPSG","SEEN",0); | |
683 | gMC->Gsatt("TPHV","SEEN",1); | |
1283eee5 | 684 | gMC->Gsatt("TPMH","SEEN",1); |
685 | gMC->Gsatt("TPEC","SEEN",0); | |
4b0fdcad | 686 | gMC->Gsatt("TRCS","SEEN",1); |
687 | gMC->Gsatt("TRCL","SEEN",1); | |
1283eee5 | 688 | gMC->Gsatt("TPWL","SEEN",1); |
689 | gMC->Gsatt("TPWI","SEEN",1); | |
690 | gMC->Gsatt("TPWS","SEEN",1); | |
4b0fdcad | 691 | gMC->Gsatt("TPW1","SEEN",1); |
1283eee5 | 692 | gMC->Gsatt("TPS1","SEEN",1); |
693 | gMC->Gsatt("TPS2","SEEN",1); | |
694 | gMC->Gsatt("TPG1","SEEN",1); | |
695 | gMC->Gsatt("TPG2","SEEN",1); | |
696 | gMC->Gsatt("TPWC","SEEN",1); | |
697 | gMC->Gsatt("TPSI","SEEN",1); | |
698 | gMC->Gsatt("TPSO","SEEN",1); | |
699 | gMC->Gsatt("TPCO","SEEN",1); | |
700 | gMC->Gsatt("TPOV","SEEN",1); | |
4b0fdcad | 701 | gMC->Gsatt("TPVD","SEEN",1); |
702 | // | |
703 | gMC->Gdopt("hide", "on"); | |
704 | gMC->Gdopt("shad", "on"); | |
705 | gMC->Gsatt("*", "fill", 7); | |
706 | gMC->SetClipBox("."); | |
707 | gMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000); | |
708 | gMC->DefaultRange(); | |
709 | gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025); | |
710 | gMC->Gdhead(1111, "Time Projection Chamber"); | |
711 | gMC->Gdman(18, 4, "MAN"); | |
712 | gMC->Gdopt("hide","off"); | |
713 | } | |
714 | ||
715 | //_____________________________________________________________________________ | |
716 | void AliTPCv3::CreateMaterials() | |
717 | { | |
718 | // | |
719 | // Define materials for version 2 of the Time Projection Chamber | |
720 | // | |
721 | ||
722 | ||
723 | // | |
724 | // Increase maximum number of steps | |
725 | gMC->SetMaxNStep(30000); | |
726 | // | |
727 | AliTPC::CreateMaterials(); | |
728 | } | |
729 | ||
730 | //_____________________________________________________________________________ | |
731 | void AliTPCv3::Init() | |
732 | { | |
733 | // | |
734 | // Initialises version 3 of the TPC after that it has been built | |
735 | // | |
736 | Int_t *idtmed = fIdtmed->GetArray()-399; | |
737 | ||
738 | AliTPC::Init(); | |
739 | ||
740 | fIdSens1=gMC->VolId("TGAS"); // drift gas as a sensitive volume | |
741 | ||
742 | gMC->SetMaxNStep(30000); // max. number of steps increased | |
743 | ||
744 | gMC->Gstpar(idtmed[403],"LOSS",5); | |
745 | ||
746 | printf("*** TPC version 3 initialized ***\n"); | |
747 | printf("Maximum number of steps = %d\n",gMC->GetMaxNStep()); | |
748 | ||
749 | // | |
750 | ||
751 | } | |
752 | ||
753 | //_____________________________________________________________________________ | |
754 | void AliTPCv3::StepManager() | |
755 | { | |
756 | // | |
757 | // Called for every step in the Time Projection Chamber | |
758 | // | |
759 | ||
760 | // | |
761 | // parameters used for the energy loss calculations | |
762 | // | |
73042f01 | 763 | const Float_t kprim = 14.35; // number of primary collisions per 1 cm |
764 | const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2 | |
765 | const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation | |
4b0fdcad | 766 | |
767 | ||
73042f01 | 768 | const Float_t kbig = 1.e10; |
4b0fdcad | 769 | |
770 | Int_t id,copy; | |
771 | TLorentzVector pos; | |
772 | Float_t hits[4]; | |
773 | Int_t vol[2]; | |
774 | TClonesArray &lhits = *fHits; | |
775 | ||
776 | vol[1]=0; | |
777 | vol[0]=0; | |
778 | ||
779 | // | |
780 | ||
73042f01 | 781 | gMC->SetMaxStep(kbig); |
4b0fdcad | 782 | |
783 | if(!gMC->IsTrackAlive()) return; // particle has disappeared | |
784 | ||
785 | Float_t charge = gMC->TrackCharge(); | |
786 | ||
787 | if(TMath::Abs(charge)<=0.) return; // take only charged particles | |
788 | ||
789 | ||
790 | id=gMC->CurrentVolID(copy); | |
791 | ||
792 | // Check the sensitive volume | |
793 | ||
794 | if (id != fIdSens1) return; | |
795 | ||
796 | // | |
797 | // charged particle is in the sensitive volume | |
798 | // | |
799 | ||
800 | if(gMC->TrackStep() > 0) { | |
801 | ||
802 | ||
73042f01 | 803 | Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1; |
4b0fdcad | 804 | nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV |
805 | ||
806 | gMC->TrackPosition(pos); | |
807 | hits[0]=pos[0]; | |
808 | hits[1]=pos[1]; | |
809 | hits[2]=pos[2]; | |
810 | ||
811 | // | |
812 | // check the selected side of the TPC | |
813 | // | |
814 | ||
815 | if(fSide && fSide*hits[2]<=0.) return; | |
816 | ||
817 | hits[3]=(Float_t)nel; | |
818 | ||
819 | // Add this hit | |
820 | ||
821 | new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits); | |
822 | ||
823 | } | |
824 | ||
825 | // Stemax calculation for the next step | |
826 | ||
827 | Float_t pp; | |
828 | TLorentzVector mom; | |
829 | gMC->TrackMomentum(mom); | |
830 | Float_t ptot=mom.Rho(); | |
73042f01 | 831 | Float_t betaGamma = ptot/gMC->TrackMass(); |
4b0fdcad | 832 | |
69e40cce | 833 | Int_t pid=gMC->TrackPid(); |
cc80f89e | 834 | if((pid==kElectron || pid==kPositron) && ptot > 0.002) |
4b0fdcad | 835 | { |
73042f01 | 836 | pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau! |
4b0fdcad | 837 | } |
838 | else | |
839 | { | |
73042f01 | 840 | pp=kprim*BetheBloch(betaGamma); |
4b0fdcad | 841 | if(TMath::Abs(charge) > 1.) pp *= (charge*charge); |
842 | } | |
843 | ||
844 | Float_t random[1]; | |
845 | gMC->Rndm(random,1); // good, old GRNDM from Geant3 | |
846 | ||
847 | Double_t rnd = (Double_t)random[0]; | |
848 | ||
849 | gMC->SetMaxStep(-TMath::Log(rnd)/pp); | |
850 | ||
851 | } | |
852 | ||
853 | //_____________________________________________________________________________ | |
854 | Float_t AliTPCv3::BetheBloch(Float_t bg) | |
855 | { | |
856 | // | |
857 | // Bethe-Bloch energy loss formula | |
858 | // | |
73042f01 | 859 | const Double_t kp1=0.76176e-1; |
860 | const Double_t kp2=10.632; | |
861 | const Double_t kp3=0.13279e-4; | |
862 | const Double_t kp4=1.8631; | |
863 | const Double_t kp5=1.9479; | |
4b0fdcad | 864 | |
865 | Double_t dbg = (Double_t) bg; | |
866 | ||
867 | Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg); | |
868 | ||
73042f01 | 869 | Double_t aa = TMath::Power(beta,kp4); |
870 | Double_t bb = TMath::Power(1./dbg,kp5); | |
4b0fdcad | 871 | |
73042f01 | 872 | bb=TMath::Log(kp3+bb); |
4b0fdcad | 873 | |
73042f01 | 874 | return ((Float_t)((kp2-aa-bb)*kp1/aa)); |
4b0fdcad | 875 | } |