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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
88cb7938 16/* $Id$ */
4c039060 17
73042f01 18//
4b0fdcad 19///////////////////////////////////////////////////////////////////////////////
20// //
21// Time Projection Chamber version 3 -- detailed TPC and slow simulation //
37831078 22//
4b0fdcad 23//Begin_Html
24/*
25<img src="picts/AliTPCv3Class.gif">
26*/
27//End_Html
28// //
29// //
30///////////////////////////////////////////////////////////////////////////////
31
32#include <stdlib.h>
116cbefd 33
116cbefd 34#include <TInterpreter.h>
88cb7938 35#include <TLorentzVector.h>
4b0fdcad 36#include <TMath.h>
88cb7938 37#include <TVirtualMC.h>
38#include <TPDGCode.h>
d9e80aca 39#include <TString.h>
40#include <TSystem.h>
116cbefd 41
4b0fdcad 42#include "AliConst.h"
116cbefd 43#include "AliRun.h"
cc80f89e 44#include "AliTPCDigitsArray.h"
4c475d27 45#include "AliTPCParam.h"
46#include "AliTPCParamSR.h"
4ed5dced 47#include "AliTPCTrackHitsV2.h"
116cbefd 48#include "AliTPCv3.h"
5d12ce38 49#include "AliMC.h"
c1637e41 50#include "TGeoManager.h"
51#include "TGeoVolume.h"
52#include "TGeoPcon.h"
53#include "TGeoTube.h"
54#include "TGeoPgon.h"
55#include "TGeoTrd1.h"
56#include "TGeoCompositeShape.h"
57#include "TGeoPara.h"
4b0fdcad 58
59ClassImp(AliTPCv3)
79575d04 60//_____________________________________________________________________________
61
179c6296 62 AliTPCv3::AliTPCv3():AliTPC(),fIdSens(0)
63{
79575d04 64
65 fHitType = 1;
66
67}
68
4b0fdcad 69//_____________________________________________________________________________
70AliTPCv3::AliTPCv3(const char *name, const char *title) :
179c6296 71 AliTPC(name, title), fIdSens(0)
4b0fdcad 72{
73 //
cc80f89e 74 // Standard constructor for Time Projection Chamber version 3
4b0fdcad 75 //
76
77 SetBufferSize(128000);
73042f01 78
79 if (fTPCParam)
80 fTPCParam->Write(fTPCParam->GetTitle());
79575d04 81
82 fHitType =1;
4b0fdcad 83}
84
85//_____________________________________________________________________________
86void AliTPCv3::CreateGeometry()
87{
88 //
cc80f89e 89 // Creation of the TPC coarse geometry (version 3)
37831078 90 // The whole drift volume is sensitive
cc80f89e 91 // Origin Marek Kowalski Cracow
4b0fdcad 92 //
93 //Begin_Html
94 /*
37831078 95 <img src="picts/AliTPCgif">
4b0fdcad 96 */
97 //End_Html
98 //Begin_Html
99 /*
37831078 100 <img src="picts/AliTPCv3Tree.gif">
4b0fdcad 101 */
102 //End_Html
c1637e41 103 //----------------------------------------------------------
104 // This geometry is written using TGeo class
105 // Firstly the shapes are defined, and only then the volumes
106 // What is recognized by the MC are volumes
107 //----------------------------------------------------------
37831078 108 //
c1637e41 109 // tpc - this will be the mother volume
37831078 110 //
1283eee5 111
37831078 112 //
c1637e41 113 // here I define a volume TPC
114 // retrive the medium name with "TPC_" as a leading string
4b0fdcad 115 //
78134e48 116 TGeoPcon *tpc = new TGeoPcon(0.,360.,20); //20 sections
4b0fdcad 117 //
78134e48 118 tpc->DefineSection(0,-291.,77.,278.);
119 tpc->DefineSection(1,-270,77.,278.);
4b0fdcad 120 //
78134e48 121 tpc->DefineSection(2,-270.,77.,278.);
122 tpc->DefineSection(3,-259.6,70.,278.);
4b0fdcad 123 //
78134e48 124 tpc->DefineSection(4,-259.6,68.1,278.);
125 tpc->DefineSection(5,-253.6,68.1,278.);
4b0fdcad 126 //
78134e48 127 tpc->DefineSection(6,-253.6,68.,278.);
128 tpc->DefineSection(7,-74.0,60.8,278.);
37831078 129 //
78134e48 130 tpc->DefineSection(8,-74.0,60.1,278.);
131 tpc->DefineSection(9,-73.3,60.1,278.);
37831078 132 //
78134e48 133 tpc->DefineSection(10,-73.3,56.9,278.);
134 tpc->DefineSection(11,73.3,56.9,278.);
79575d04 135 //
78134e48 136 tpc->DefineSection(12,73.3,60.1,278.);
137 tpc->DefineSection(13,74.0,60.1,278.);
c1637e41 138 //
78134e48 139 tpc->DefineSection(14,74.0,60.8,278.);
140 tpc->DefineSection(15,253.6,65.5,278.);
141 //
142 tpc->DefineSection(16,253.6,65.6,278.);
143 tpc->DefineSection(17,259.6,65.6,278.);
144 //
145 tpc->DefineSection(18,259.6,70.0,278.);
146 tpc->DefineSection(19,291.,77.,278.);
c1637e41 147 //
148 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
149 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
150 //
151 // drift volume - sensitive volume, extended beyond the
152 // endcaps, because of the alignment
153 //
154 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
155 dvol->DefineSection(0,-260.,74.5,264.4);
156 dvol->DefineSection(1,-253.6,74.5,264.4);
157 //
158 dvol->DefineSection(2,-253.6,76.6774,258.);
159 dvol->DefineSection(3,253.6,76.6774,258.);
160 //
161 dvol->DefineSection(4,253.6,74.5,264.4);
162 dvol->DefineSection(5,260.,74.5,264.4);
163 //
164 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
165 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
166 //
167 v1->AddNode(v9,1);
168 //
169 // outer insulator
170 //
171 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
172 //
173 tpco->DefineSection(0,-256.6,264.8,278.);
174 tpco->DefineSection(1,-253.6,264.8,278.);
175 //
176 tpco->DefineSection(2,-253.6,258.,278.);
177 tpco->DefineSection(3,250.6,258.,278.);
178 //
179 tpco->DefineSection(4,250.6,258.,275.5);
180 tpco->DefineSection(5,253.6,258.,275.5);
181 //
182 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
183 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
184 //
185 // outer containment vessel
186 //
187 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
188 //
189 tocv->DefineSection(0,-256.6,264.8,278.);
190 tocv->DefineSection(1,-253.6,264.8,278.);
191 //
192 tocv->DefineSection(2,-253.6,274.8124,278.);
193 tocv->DefineSection(3,247.6,274.8124,278.);
194 //
195 tocv->DefineSection(4,247.6,270.4,278.);
196 tocv->DefineSection(5,250.6,270.4,278.);
197 //
198 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
199 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
200 //
201 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
202 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
203 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
204 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
205 //
206 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
207 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
208 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
209 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
210 //
211 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
212 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
213 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
214 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
37831078 215
c1637e41 216 //-------------------------------------------------------
217 // Tpc Outer Field Cage
218 // daughters - composite (sandwich)
219 //-------------------------------------------------------
37831078 220
c1637e41 221 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
222 //
223 tofc->DefineSection(0,-253.6,258.,269.6);
224 tofc->DefineSection(1,-250.6,258.,269.6);
225 //
226 tofc->DefineSection(2,-250.6,258.,260.0676);
227 tofc->DefineSection(3,250.6,258.,260.0676);
228 //
229 tofc->DefineSection(4,250.6,258.,275.5);
230 tofc->DefineSection(5,253.6,258.,275.5);
231 //
232 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
233 //sandwich
234 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
235 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
236 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
237 //
238 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
239 //
240 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
241 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
242 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
243 //
244 // outer part - positioning
245 //
246 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
247 //
248 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
249 //
456cb019 250 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
c1637e41 251 //
252 v2->AddNode(v3,1); v2->AddNode(v4,1);
253 //
254 v1->AddNode(v2,1);
255 //-----------------------------------------------------------
37831078 256
37831078 257
37831078 258
37831078 259
37831078 260
37831078 261
c1637e41 262 //--------------------------------------------------------------------
263 // Tpc Inner INsulator (CO2)
264 // the cones, the central drum and the inner f.c. sandwich with a piece
265 // of the flane will be placed in the TPC
266 //--------------------------------------------------------------------
267 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
268 //
269 tpci->DefineSection(0,-253.6,68.4,76.6774);
270 tpci->DefineSection(1,-74.0,61.2,76.6774);
271 //
272 tpci->DefineSection(2,74.0,61.2,76.6774);
273 //
274 tpci->DefineSection(3,253.6,65.9,76.6774);
275 //
276 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
277 //
278 // now the inner field cage - only part of flanges (2 copies)
279 //
280 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
281 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
282 //
283 //---------------------------------------------------------
284 // Tpc Inner Containment vessel - Muon side
285 //---------------------------------------------------------
286 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
287 //
288 tcms->DefineSection(0,-259.1,68.1,74.2);
289 tcms->DefineSection(1,-253.6,68.1,74.2);
290 //
291 tcms->DefineSection(2,-253.6,68.1,68.4);
292 tcms->DefineSection(3,-74.0,60.9,61.2);
293 //
294 tcms->DefineSection(4,-74.0,60.1,61.2);
295 tcms->DefineSection(5,-73.3,60.1,61.2);
296 //
297 tcms->DefineSection(6,-73.3,56.9,61.2);
298 tcms->DefineSection(7,-73.0,56.9,61.2);
299 //
300 tcms->DefineSection(8,-73.0,56.9,58.8);
301 tcms->DefineSection(9,-71.3,56.9,58.8);
302 //
303 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
37831078 304 //-----------------------------------------------
c1637e41 305 // inner containment vessel - shaft side
37831078 306 //-----------------------------------------------
c1637e41 307 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
308 //
309 tcss->DefineSection(0,71.3,56.9,58.8);
310 tcss->DefineSection(1,73.0,56.9,58.8);
311 //
312 tcss->DefineSection(2,73.0,56.9,61.2);
313 tcss->DefineSection(3,73.3,56.9,61.2);
314 //
315 tcss->DefineSection(4,73.3,60.1,61.2);
316 tcss->DefineSection(5,74.0,60.1,61.2);
317 //
318 tcss->DefineSection(6,74.0,60.9,61.2);
319 tcss->DefineSection(7,253.6,65.6,65.9);
320 //
321 tcss->DefineSection(8,253.6,65.6,74.2);
322 tcss->DefineSection(9,258.1,65.6,74.2);
323 //
324 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
325 //-----------------------------------------------
326 // Inner field cage
327 // define 4 parts and make an assembly
328 //-----------------------------------------------
329 // part1 - Al - 2 copies
330 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
331 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
332 // sandwich - outermost parts - 2 copies
333 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
334 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
335 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
336 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
337 //
338 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
339 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
340 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
341 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
342 //
343 // middle parts - 2 copies
344 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
345 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
346 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
347 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
348 //
349 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
350 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
351 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
352 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
353 // central part - 1 copy
354 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
355 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
356 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
357 //
358 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
359 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
360 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
361 //
362 // inner part - positioning
363 //
364 // creating a sandwich
365 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
366 //
367 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
368 //
369 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
370 //
371 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
372 //
373 tv100->AddNode(tv10,1);
374 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
375 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
376 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
377 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
378 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
379 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
380 //
381 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
382 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
383 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
384 v9->AddNode(tv100,1);
385 //
386 // central drum
387 //
388 // flange + sandwich
389 //
390 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
391 cfl->DefineSection(0,-71.1,59.7,61.2);
392 cfl->DefineSection(1,-68.6,59.7,61.2);
393 //
394 cfl->DefineSection(2,-68.6,60.6324,61.2);
395 cfl->DefineSection(3,68.6,60.6324,61.2);
396 //
397 cfl->DefineSection(4,68.6,59.7,61.2);
398 cfl->DefineSection(5,71.1,59.7,61.2);
399 //
400 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
401 // sandwich
402 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
403 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
404 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
405 //
406 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
407 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
408 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
409 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
410 //
411 // seals for central drum 2 copies
412 //
413 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
414 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
415 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
78134e48 416 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
417 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
c1637e41 418 //
419 // seal collars
420 TGeoPcon *se = new TGeoPcon(0.,360.,6);
421 se->DefineSection(0,-72.8,59.7,61.2);
422 se->DefineSection(1,-72.3,59.7,61.2);
423 //
424 se->DefineSection(2,-72.3,58.85,61.2);
425 se->DefineSection(3,-71.6,58.85,61.2);
426 //
427 se->DefineSection(4,-71.6,59.7,61.2);
428 se->DefineSection(5,-71.3,59.7,61.2);
429 //
430 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
431 //
432 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
433 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
434 //
435 // define reflection matrix
436 //
4fa47888 437 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
c1637e41 438 //
439 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
440 //
a1ec4d07 441 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
442 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
c1637e41 443 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
444 //
445 // central membrane - 2 rings and a mylar membrane - assembly
446 //
447 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
448 TGeoTube *oh = new TGeoTube(250.,256.,.5);
449 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
450 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
451 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
452 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
453 //
454 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
455 cm->AddNode(ihv,1);
456 cm->AddNode(ohv,1);
457 cm->AddNode(memv,1);
458 v9->AddNode(cm,1);
459 //
460 // end caps - they are make as an assembly of single segments
461 // containing both readout chambers
462 //
d899e254 463 Double_t openingAngle = 10.*TMath::DegToRad();
c1637e41 464 Double_t thick=1.5; // rib
d899e254 465 Double_t shift = thick/TMath::Sin(openingAngle);
c1637e41 466 //
d899e254 467 Double_t lowEdge = 86.3; // hole in the wheel
468 Double_t upEdge = 240.4; // hole in the wheel
c1637e41 469 //
470 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
471 //
472 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
473 //
d899e254 474 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
475 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
c1637e41 476 //
d899e254 477 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
478 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
c1637e41 479 //
d899e254 480 Double_t ys = shift*TMath::Sin(openingAngle);
481 Double_t xs = shift*TMath::Cos(openingAngle);
c1637e41 482 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
483 tr->RegisterYourself();
484 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
485 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
486 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
487 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
488 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
489 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
490 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
491 //
492 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
493 //
494 // readout chambers
495 //
496 // IROC first
497 //
498 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
499 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
500 // empty space
501 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
502 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
503 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
504 //bars
505 Double_t tga = (19.8328-12.3742)/39.3;
506 Double_t xmin,xmax;
507 xmin = 9.55*tga+12.3742;
508 xmax = 9.95*tga+12.3742;
509 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
510 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
511 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
512 xmin=19.4*tga+12.3742;
513 xmax=19.9*tga+12.3742;
514 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
515 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
516 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
517 xmin=29.35*tga+12.3742;
518 xmax=29.75*tga+12.3742;
519 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
520 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
521 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
522 //
523 // holes for connectors
524 //
525 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
526 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
d9e80aca 527 TString fileName(gSystem->Getenv("ALICE_ROOT"));
528 fileName += "/TPC/conn_iroc.dat";
c1637e41 529 ifstream in;
d9e80aca 530 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 531 for(Int_t i =0;i<86;i++){
456cb019 532 Double_t y = 3.99;
c1637e41 533 Double_t x,z,ang;
534 in>>x>>z>>ang;
456cb019 535 z-=26.5;
c1637e41 536 TGeoRotation *rrr = new TGeoRotation();
537 rrr->RotateY(ang);
538 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
539 ibdv->AddNode(connv,i+1,trans);
540 }
541 in.close();
542 // "cap"
543 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
544 // "hole"
545 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
546 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
547 tr1->RegisterYourself();
548 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
549 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
550 //
551 // pad plane and wire fixations
552 //
553 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
554 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
555 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
556 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
557 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
558 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
559 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
560 //
561 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
562 //
563 iroc->AddNode(ibdv,1);
564 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
565 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
566 tga =(23.3521-14.5974)/49.65;
567 Double_t xx = 24.825*tga+14.5974-0.6;
568 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
569 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
570 //
571 // OROC
572 //
573 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
574 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
575 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
576 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
577 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
578 //horizontal bars
579 tga=(38.5084-20.2938)/99.3;
580 xmin=tga*10.2+20.2938;
581 xmax=tga*10.6+20.2938;
582 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
583 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
584 //
585 xmin=22.55*tga+20.2938;
586 xmax=24.15*tga+20.2938;
587 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
588 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
589 //
590 xmin=36.1*tga+20.2938;
591 xmax=36.5*tga+20.2938;
592 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
593 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
594 //
595 xmin=49.0*tga+20.2938;
596 xmax=50.6*tga+20.2938;
597 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
598 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
599 //
600 xmin=63.6*tga+20.2938;
601 xmax=64.0*tga+20.2938;
602 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
603 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
604 //
605 xmin=75.5*tga+20.2938;
606 xmax=77.15*tga+20.2938;
607 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
608 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
609 //
610 xmin=88.7*tga+20.2938;
611 xmax=89.1*tga+20.2938;
612 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
613 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
614 //
615 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
616 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
617 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
618 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
619 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
620 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
621 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
622 // vertical bars
623 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
624 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
625 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
626 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
627 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
628 //
629 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
630 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
631 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
632 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
633 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
634 //
635 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
636 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
637 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
638 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
639 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
640 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
641 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
642 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
643 //
644 // holes for connectors
645 //
d9e80aca 646 fileName = gSystem->Getenv("ALICE_ROOT");
647 fileName += "/TPC/conn_oroc.dat";
648 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 649 for(Int_t i =0;i<78;i++){
650 Double_t y =3.89;
651 Double_t x,z,ang;
652 Double_t x1,z1,x2,z2;
653 in>>x>>z>>ang;
654 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
655 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
656 //
657 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
658 //
659 TGeoRotation *rr = new TGeoRotation();
660 rr->RotateY(ang);
661 z1-=54.95;
662 z2-=54.95;
663 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
664 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
665 obdv->AddNode(connv,i+1,trans1);
666 obdv->AddNode(connv,i+79,trans2);
667 }
668 in.close();
669 // cap
670 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
671 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
672 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
673 tr5->RegisterYourself();
674 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
675 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
676 //
677 // pad plane and wire fixations
678 //
679 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
680 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
681 //
682 tga=(43.5239-23.3874)/114.2;
683 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
684 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
685 xx = 57.1*tga+23.3874-0.7;
686 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
687 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
688 //
689 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
690 //
691 oroc->AddNode(obdv,1);
692 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
693 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
694 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
695 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
696 //
697 // now iroc and oroc are placed into a sector...
698 //
a1ec4d07 699 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
700 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
c1637e41 701 TGeoRotation rot1("rot1",90.,90.,0.);
702 TGeoRotation rot2("rot2");
703 rot2.RotateY(10.);
704 TGeoRotation *rot = new TGeoRotation("rot");
705 *rot=rot1*rot2;
706 //
707 Double_t x0,y0;
d899e254 708 x0=110.2*TMath::Cos(openingAngle);
709 y0=110.2*TMath::Sin(openingAngle);
20527578 710 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
711 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
d899e254 712 x0=188.45*TMath::Cos(openingAngle);
713 y0=188.45*TMath::Sin(openingAngle);
20527578 714 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
715 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
c1637e41 716 //
a1ec4d07 717 // A-side
c1637e41 718 //
a1ec4d07 719 secta->AddNode(ch,1);
720 secta->AddNode(iroc,1,combi1a);
721 secta->AddNode(oroc,1,combi2a);
c1637e41 722 //
a1ec4d07 723 // C-side
724 //
725 sectc->AddNode(ch,1);
726 sectc->AddNode(iroc,1,combi1c);
727 sectc->AddNode(oroc,1,combi2c);
728 //
729 // now I try to make wheels...
730 //
731 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
732 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
c1637e41 733 //
734 for(Int_t i =0;i<18;i++){
735 Double_t phi = (20.*i);
736 TGeoRotation *r = new TGeoRotation();
737 r->RotateZ(phi);
a1ec4d07 738 wheela->AddNode(secta,i+1,r);
739 wheelc->AddNode(sectc,i+1,r);
c1637e41 740
741 }
742 // wheels in the drift volume!
c1637e41 743 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
a1ec4d07 744 v9->AddNode(wheela,1,combi3);
745 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
37831078 746
c1637e41 747 //_____________________________________________________________
748 // service support wheel
749 //_____________________________________________________________
750 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
751 sw->DefineSection(0,-4.,80.5,251.75);
752 sw->DefineSection(1,4.,80.5,251.75);
753 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
754 //
755 thick=1.;
d899e254 756 shift = thick/TMath::Sin(openingAngle);
c1637e41 757 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
758 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
759 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
760 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
761 //
74518339 762 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
763 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
764 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
765 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
766 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
767 //
768 shv->AddNode(elv,1);
769 //
d899e254 770 ys = shift*TMath::Sin(openingAngle);
771 xs = shift*TMath::Cos(openingAngle);
c1637e41 772 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
773 // cover
774 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
775 co->DefineSection(0,-0.5,77.,255.25);
776 co->DefineSection(1,0.5,77.,255.25);
777 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
778 // hole in a cover
779 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
d899e254 780 shift=4./TMath::Sin(openingAngle);
c1637e41 781 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
782 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
783 //
784 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
785 //
d899e254 786 ys = shift*TMath::Sin(openingAngle);
787 xs = shift*TMath::Cos(openingAngle);
c1637e41 788 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
789 //
790 // Sector as an Assembly
791 //
792 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
793 swhs->AddNode(swv,1);
794 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
795 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
796 //
797 // SSW as an Assembly of sectors
798 //
799 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
800 for(Int_t i =0;i<18;i++){
801 Double_t phi = (20.*i);
802 TGeoRotation *r = new TGeoRotation();
803 r->RotateZ(phi);
804 swheel->AddNode(swhs,i+1,r);
805 }
806 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
807 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
808 //
37831078 809 //----------------------------------------------------------
810 // TPc Support Rods - MAKROLON
811 //----------------------------------------------------------
c1637e41 812 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
813 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
78134e48 814 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
815 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");
816 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
c1637e41 817 // upper and lower rods differ in length!
818 Double_t *upar;
819 upar=NULL;
820 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
821 upar=new Double_t [3];
822 upar[0]=1.8;
823 upar[1]=2.2;
824
825 //
826 //HV rods - makrolon + 0.58cm (diameter) Cu
ae4806ca 827 TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
c1637e41 828 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
829 //
830 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
831 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
832 hvrv->AddNode(hvcv,1);
78134e48 833 //
834 // resistor rods
835 //
836 TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner
837 TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer
838 TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
839 TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
840 //
841 TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
842 TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);
843 TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
844 TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);
845 //
846 // ceramic rod with water
847 //
848 criv->AddNode(cwiv,1);
849 crov->AddNode(cwov,1);
850 //
851 TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner
852 TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer
853 //
854 // peek rod
855 //
856 TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
857 TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12);
858 //
859 // resistor rods assembly
860 //
be53328e 861 TGeoRotation *rotr = new TGeoRotation("rotr");
862 rotr->RotateZ(-21.);
78134e48 863 //
864 TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
865 TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
866 //
867 TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
868 TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);
869 //
a3d2be59 870 TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
871 TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
872 rrin->AddNode(rriv,1);
873 rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
874 rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.));
875 rrin->AddNode(priv,1);
876 //
877 rrou->AddNode(rrov,1);
878 rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
879 rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.));
880 rrou->AddNode(prov,1);
7281dc07 881 for(Int_t i=0;i<18;i++){
c1637e41 882 Double_t angle,x,y;
883 Double_t z,r;
884 angle=TMath::DegToRad()*20.*(Double_t)i;
885 r=81.5;
886 x=r * TMath::Cos(angle);
887 y=r * TMath::Sin(angle);
888 upar[2]=126.64; //lower
889 z= 126.96;
78134e48 890 //
891 if(i==3){
be53328e 892 v9->AddNode(rrin,1,new TGeoCombiTrans(x,y,z,rotr)); //A
893 v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
78134e48 894 }
895 else {
896 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
897 gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
c1637e41 898 }
78134e48 899
900
901 //
c1637e41 902 r=254.25;
903 x=r * TMath::Cos(angle);
904 y=r * TMath::Sin(angle);
905 upar[2]=126.54; //upper
906 z=127.06;
78134e48 907 if(i==15){
908 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
909 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
910 }
911 else if(i==11){
be53328e 912 v9->AddNode(rrou,1,new TGeoCombiTrans(x,y,z,rotr)); //A
913 v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
78134e48 914 }
915 else{
916 //
917 gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
918 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
919 }
37831078 920 }
921
bde68ab0 922 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
923 alice->AddNode(v1,1);
924
37831078 925
926
927} // end of function
37831078 928
929//_____________________________________________________________________________
930void AliTPCv3::DrawDetector()
931{
932 //
79575d04 933 // Draw a shaded view of the Time Projection Chamber version 3
37831078 934 //
935
936
937 // Set everything unseen
938 gMC->Gsatt("*", "seen", -1);
939 //
940 // Set ALIC mother transparent
941 gMC->Gsatt("ALIC","SEEN",0);
942 //
943 // Set the volumes visible
944 //
945
946 gMC->Gsatt("TPC ","SEEN",0);
947 gMC->Gsatt("TOIN","SEEN",1);
948 gMC->Gsatt("TOIN","COLO",7);
37831078 949 gMC->Gsatt("TOCV","SEEN",1);
950 gMC->Gsatt("TOCV","COLO",4);
951 gMC->Gsatt("TSA1","SEEN",0);
952 gMC->Gsatt("TSA2","SEEN",0);
953 gMC->Gsatt("TSA3","SEEN",0);
79575d04 954 gMC->Gsatt("TSA4","SEEN",0);
955 gMC->Gsatt("TSA5","SEEN",0);
37831078 956 gMC->Gsatt("TOFC","SEEN",1);
957 gMC->Gsatt("TOFC","COLO",4);
37831078 958 gMC->Gsatt("TSA6","SEEN",0);
959 gMC->Gsatt("TSA7","SEEN",0);
79575d04 960 gMC->Gsatt("TSA8","SEEN",0);
37831078 961 gMC->Gsatt("TIIN","SEEN",1);
79575d04 962 gMC->Gsatt("TIIN","COLO",7);
963 gMC->Gsatt("TII1","SEEN",0);
964 gMC->Gsatt("TIFC","SEEN",1);
965 gMC->Gsatt("TIFC","COLO",4);
966 gMC->Gsatt("TSA9","SEEN",0);
37831078 967 gMC->Gsatt("TS10","SEEN",0);
968 gMC->Gsatt("TS11","SEEN",0);
969 gMC->Gsatt("TS12","SEEN",0);
37831078 970 gMC->Gsatt("TS13","SEEN",0);
971 gMC->Gsatt("TS14","SEEN",0);
79575d04 972 gMC->Gsatt("TICC","SEEN",0);
973 gMC->Gsatt("TICM","SEEN",0);
37831078 974 gMC->Gsatt("TS15","SEEN",0);
975 gMC->Gsatt("TS16","SEEN",0);
37831078 976 gMC->Gsatt("TS17","SEEN",0);
79575d04 977 gMC->Gsatt("TS18","SEEN",0);
978 gMC->Gsatt("TS19","SEEN",0);
979 gMC->Gsatt("TPJ1","SEEN",0);
980 gMC->Gsatt("TPJ2","SEEN",0);
981 gMC->Gsatt("TICS","SEEN",0);
982 gMC->Gsatt("TDGS","SEEN",0);
37831078 983 gMC->Gsatt("TIRC","SEEN",0);
984 gMC->Gsatt("TIC1","SEEN",1);
985 gMC->Gsatt("TIPP","SEEN",0);
986 gMC->Gsatt("TIC3","SEEN",0);
987 gMC->Gsatt("TRCE","SEEN",0);
988 gMC->Gsatt("TPSC","SEEN",0);
79575d04 989 gMC->Gsatt("TPCC","SEEN",0);
37831078 990 gMC->Gsatt("TORC","SEEN",0);
991 gMC->Gsatt("TOPP","SEEN",0);
992 gMC->Gsatt("TOC3","SEEN",0);
993 gMC->Gsatt("TOC1","SEEN",1);
994 gMC->Gsatt("TSSW","SEEN",1);
995 gMC->Gsatt("TSWC","SEEN",1);
37831078 996 gMC->Gsatt("TSSW","COLO",3);
997 gMC->Gsatt("TSWC","COLO",3);
998 gMC->Gsatt("TSCE","COLO",6);
79575d04 999 gMC->Gsatt("TSCE","SEEN",1);
37831078 1000 gMC->Gsatt("TWES","SEEN",0);
1001 gMC->Gsatt("TSWB","SEEN",0);
1002 gMC->Gsatt("TPEL","SEEN",0);
1003 gMC->Gsatt("TPMW","SEEN",1);
37831078 1004 gMC->Gsatt("TESR","SEEN",1);
1005 gMC->Gsatt("TPMW","COLO",12);
37831078 1006 gMC->Gsatt("TIC1","COLO",5);
79575d04 1007 gMC->Gsatt("TOC1","COLO",5);
37831078 1008 gMC->Gsatt("TESB","SEEN",0);
37831078 1009 gMC->Gsatt("THVM","SEEN",1);
1010 gMC->Gsatt("THVM","COLO",11);
79575d04 1011 gMC->Gsatt("THVH","SEEN",0);
1012 gMC->Gsatt("TPSR","SEEN",0);
37831078 1013 gMC->Gsatt("THVL","SEEN",0);
79575d04 1014 gMC->Gsatt("THVC","SEEN",0);
37831078 1015 gMC->Gsatt("THVE","SEEN",0);
1016 gMC->Gsatt("THVR","SEEN",0);
1017
1018 //
1019 gMC->Gdopt("hide", "on");
1020 gMC->Gdopt("shad", "on");
1021 gMC->Gsatt("*", "fill", 7);
1022 gMC->SetClipBox(".");
1023 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1024 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1025 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1026 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1027 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1028 gMC->DefaultRange();
1029 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1030 gMC->Gdhead(1111, "Time Projection Chamber");
1031 gMC->Gdman(18, 4, "MAN");
1032 gMC->Gdopt("hide","off");
1033}
1034
1035//_____________________________________________________________________________
1036void AliTPCv3::CreateMaterials()
1037{
1038 //
1039 // Define materials for version 2 of the Time Projection Chamber
1040 //
1041
1042
1043 //
1044 AliTPC::CreateMaterials();
1045}
1046
1047//_____________________________________________________________________________
1048void AliTPCv3::Init()
1049{
1050 //
1051 // Initialises version 3 of the TPC after that it has been built
1052 //
1053 Int_t *idtmed = fIdtmed->GetArray();
4b0fdcad 1054
1055 AliTPC::Init();
1056
c1637e41 1057 fIdSens=gMC->VolId("TPC_Drift"); // drift gas as a sensitive volume
4b0fdcad 1058
d9888f70 1059 gMC->SetMaxNStep(-30000); // max. number of steps increased
4b0fdcad 1060
37831078 1061 gMC->Gstpar(idtmed[2],"LOSS",5);
4b0fdcad 1062
13a8c8d7 1063 printf("%s: *** TPC version 3 initialized***\n",ClassName());
1064
1065 printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
1066
1067 // printf("*** TPC version 3 initialized ***\n");
1068 // printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
4b0fdcad 1069
1070 //
1071
1072}
1073
1074//_____________________________________________________________________________
1075void AliTPCv3::StepManager()
1076{
1077 //
1078 // Called for every step in the Time Projection Chamber
1079 //
1080
1081 //
1082 // parameters used for the energy loss calculations
1083 //
73042f01 1084 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1085 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1086 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
4b0fdcad 1087
1088
73042f01 1089 const Float_t kbig = 1.e10;
4b0fdcad 1090
1091 Int_t id,copy;
1092 TLorentzVector pos;
e61fd20d 1093 Float_t hits[5];
4b0fdcad 1094 Int_t vol[2];
4b0fdcad 1095
1096 vol[1]=0;
1097 vol[0]=0;
1098
1099 //
1100
73042f01 1101 gMC->SetMaxStep(kbig);
4b0fdcad 1102
1103 if(!gMC->IsTrackAlive()) return; // particle has disappeared
1104
1105 Float_t charge = gMC->TrackCharge();
1106
1107 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1108
1109
1110 id=gMC->CurrentVolID(copy);
c1637e41 1111
4b0fdcad 1112
37831078 1113 if (id != fIdSens) return;
4b0fdcad 1114
1115 //
1116 // charged particle is in the sensitive volume
1117 //
1118
1119 if(gMC->TrackStep() > 0) {
1120
1121
73042f01 1122 Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
4b0fdcad 1123 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1124
1125 gMC->TrackPosition(pos);
1126 hits[0]=pos[0];
1127 hits[1]=pos[1];
1128 hits[2]=pos[2];
1129
e61fd20d 1130 // Get also the track time for pileup simulation
1131 hits[4]=gMC->TrackTime();
1132
4b0fdcad 1133 //
1134 // check the selected side of the TPC
1135 //
1136
1137 if(fSide && fSide*hits[2]<=0.) return;
1138
1139 hits[3]=(Float_t)nel;
1140
1141 // Add this hit
1142
5d12ce38 1143 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); //MI change
4b0fdcad 1144
1145 }
1146
1147 // Stemax calculation for the next step
1148
1149 Float_t pp;
1150 TLorentzVector mom;
1151 gMC->TrackMomentum(mom);
1152 Float_t ptot=mom.Rho();
73042f01 1153 Float_t betaGamma = ptot/gMC->TrackMass();
4b0fdcad 1154
69e40cce 1155 Int_t pid=gMC->TrackPid();
cc80f89e 1156 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
4b0fdcad 1157 {
73042f01 1158 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
4b0fdcad 1159 }
1160 else
1161 {
7b562732 1162 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3);
73042f01 1163 pp=kprim*BetheBloch(betaGamma);
4b0fdcad 1164 if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1165 }
1166
b9d0a01d 1167 Double_t rnd = gMC->GetRandom()->Rndm();
4b0fdcad 1168
1169 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1170
1171}
1172
1173//_____________________________________________________________________________
1174Float_t AliTPCv3::BetheBloch(Float_t bg)
1175{
1176 //
1177 // Bethe-Bloch energy loss formula
1178 //
73042f01 1179 const Double_t kp1=0.76176e-1;
1180 const Double_t kp2=10.632;
1181 const Double_t kp3=0.13279e-4;
1182 const Double_t kp4=1.8631;
1183 const Double_t kp5=1.9479;
4b0fdcad 1184
1185 Double_t dbg = (Double_t) bg;
1186
1187 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1188
73042f01 1189 Double_t aa = TMath::Power(beta,kp4);
1190 Double_t bb = TMath::Power(1./dbg,kp5);
4b0fdcad 1191
73042f01 1192 bb=TMath::Log(kp3+bb);
4b0fdcad 1193
73042f01 1194 return ((Float_t)((kp2-aa-bb)*kp1/aa));
4b0fdcad 1195}