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Fixing the problem that was causing the dip (savannah bug 48080):
[u/mrichter/AliRoot.git] / TPC / AliTPCv2.cxx
CommitLineData
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//
fe4da5cc 19///////////////////////////////////////////////////////////////////////////////
20// //
21// Time Projection Chamber version 2 -- detailed TPC and slow simulation //
22// //
23//Begin_Html
24/*
1439f98e 25<img src="picts/AliTPCv2Class.gif">
fe4da5cc 26*/
27//End_Html
28// //
29// //
30///////////////////////////////////////////////////////////////////////////////
116cbefd 31
d899e254 32//#include <stdlib.h>
fe4da5cc 33
88cb7938 34#include <TLorentzVector.h>
116cbefd 35#include <TPDGCode.h>
d9e80aca 36#include <TString.h>
f77f13c8 37#include "AliLog.h"
b40afa5e 38#include "AliMathBase.h"
e6add757 39#include "AliTrackReference.h"
73042f01 40#include "AliTPCParam.h"
4ed5dced 41#include "AliTPCTrackHitsV2.h"
116cbefd 42#include "AliTPCv2.h"
cdf69b9a 43#include "AliGeomManager.h"
c1637e41 44#include "TGeoVolume.h"
45#include "TGeoPcon.h"
46#include "TGeoTube.h"
47#include "TGeoPgon.h"
48#include "TGeoTrd1.h"
49#include "TGeoCompositeShape.h"
50#include "TGeoPara.h"
1ac29fc4 51#include "TGeoPhysicalNode.h"
52
c1637e41 53ClassImp(AliTPCv2)
54
55//_____________________________________________________________________________
56AliTPCv2::AliTPCv2(const char *name, const char *title) :
e046d791 57 AliTPC(name, title),
58 fIdSens(0),
59 fIDrift(0),
60 fSecOld(0)
c1637e41 61{
62 //
63 // Standard constructor for Time Projection Chamber version 2
64 //
6a905708 65
37831078 66
c1637e41 67 SetBufferSize(128000);
79575d04 68
79575d04 69
db2fdcfb 70// if (fTPCParam)
71// fTPCParam->Write(fTPCParam->GetTitle());
c1637e41 72}
73
74//_____________________________________________________________________________
75void AliTPCv2::CreateGeometry()
76{
77 //
78 // Create the geometry of Time Projection Chamber version 2
79 //
80 //Begin_Html
81 /*
82 <img src="picts/AliTPC.gif">
83 */
84 //End_Html
85 //Begin_Html
86 /*
87 <img src="picts/AliTPCv2Tree.gif">
88 */
89 //End_Html
37831078 90
91 //----------------------------------------------------------
c1637e41 92 // This geometry is written using TGeo class
93 // Firstly the shapes are defined, and only then the volumes
94 // What is recognized by the MC are volumes
37831078 95 //----------------------------------------------------------
c1637e41 96 //
97 // tpc - this will be the mother volume
98 //
37831078 99
c1637e41 100 //
101 // here I define a volume TPC
102 // retrive the medium name with "TPC_" as a leading string
103 //
78134e48 104 TGeoPcon *tpc = new TGeoPcon(0.,360.,20); //20 sections
c1637e41 105 //
78134e48 106 tpc->DefineSection(0,-291.,77.,278.);
107 tpc->DefineSection(1,-270,77.,278.);
c1637e41 108 //
78134e48 109 tpc->DefineSection(2,-270.,77.,278.);
110 tpc->DefineSection(3,-259.6,70.,278.);
c1637e41 111 //
78134e48 112 tpc->DefineSection(4,-259.6,68.1,278.);
113 tpc->DefineSection(5,-253.6,68.1,278.);
c1637e41 114 //
78134e48 115 tpc->DefineSection(6,-253.6,68.,278.);
116 tpc->DefineSection(7,-74.0,60.8,278.);
c1637e41 117 //
78134e48 118 tpc->DefineSection(8,-74.0,60.1,278.);
119 tpc->DefineSection(9,-73.3,60.1,278.);
c1637e41 120 //
78134e48 121 tpc->DefineSection(10,-73.3,56.9,278.);
122 tpc->DefineSection(11,73.3,56.9,278.);
c1637e41 123 //
78134e48 124 tpc->DefineSection(12,73.3,60.1,278.);
125 tpc->DefineSection(13,74.0,60.1,278.);
c1637e41 126 //
78134e48 127 tpc->DefineSection(14,74.0,60.8,278.);
128 tpc->DefineSection(15,253.6,65.5,278.);
129 //
130 tpc->DefineSection(16,253.6,65.6,278.);
131 tpc->DefineSection(17,259.6,65.6,278.);
132 //
133 tpc->DefineSection(18,259.6,70.0,278.);
134 tpc->DefineSection(19,291.,77.,278.);
c1637e41 135 //
136 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
137 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
138 //
139 // drift volume - sensitive volume, extended beyond the
140 // endcaps, because of the alignment
141 //
142 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
143 dvol->DefineSection(0,-260.,74.5,264.4);
144 dvol->DefineSection(1,-253.6,74.5,264.4);
145 //
146 dvol->DefineSection(2,-253.6,76.6774,258.);
147 dvol->DefineSection(3,253.6,76.6774,258.);
148 //
149 dvol->DefineSection(4,253.6,74.5,264.4);
150 dvol->DefineSection(5,260.,74.5,264.4);
151 //
152 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
153 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
154 //
155 v1->AddNode(v9,1);
156 //
157 // outer insulator
158 //
159 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
160 //
161 tpco->DefineSection(0,-256.6,264.8,278.);
162 tpco->DefineSection(1,-253.6,264.8,278.);
163 //
164 tpco->DefineSection(2,-253.6,258.,278.);
165 tpco->DefineSection(3,250.6,258.,278.);
166 //
167 tpco->DefineSection(4,250.6,258.,275.5);
168 tpco->DefineSection(5,253.6,258.,275.5);
169 //
170 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
171 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
172 //
173 // outer containment vessel
174 //
175 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
176 //
177 tocv->DefineSection(0,-256.6,264.8,278.);
178 tocv->DefineSection(1,-253.6,264.8,278.);
179 //
180 tocv->DefineSection(2,-253.6,274.8124,278.);
181 tocv->DefineSection(3,247.6,274.8124,278.);
182 //
183 tocv->DefineSection(4,247.6,270.4,278.);
184 tocv->DefineSection(5,250.6,270.4,278.);
185 //
186 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
187 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
188 //
189 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
190 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
191 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
192 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
193 //
194 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
195 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
196 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
197 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
198 //
199 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
200 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
201 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
202 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
203 //-------------------------------------------------------
204 // Tpc Outer Field Cage
205 // daughters - composite (sandwich)
206 //-------------------------------------------------------
37831078 207
c1637e41 208 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
209 //
210 tofc->DefineSection(0,-253.6,258.,269.6);
211 tofc->DefineSection(1,-250.6,258.,269.6);
212 //
213 tofc->DefineSection(2,-250.6,258.,260.0676);
214 tofc->DefineSection(3,250.6,258.,260.0676);
215 //
216 tofc->DefineSection(4,250.6,258.,275.5);
217 tofc->DefineSection(5,253.6,258.,275.5);
218 //
219 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
220 //sandwich
221 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
222 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
223 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
224 //
225 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
226 //
227 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
228 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
229 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
230 //
231 // outer part - positioning
232 //
233 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
234 //
235 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
236 //
456cb019 237 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
c1637e41 238 //
239 v2->AddNode(v3,1); v2->AddNode(v4,1);
240 //
241 v1->AddNode(v2,1);
242 //--------------------------------------------------------------------
243 // Tpc Inner INsulator (CO2)
244 // the cones, the central drum and the inner f.c. sandwich with a piece
245 // of the flane will be placed in the TPC
246 //--------------------------------------------------------------------
247 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
248 //
249 tpci->DefineSection(0,-253.6,68.4,76.6774);
250 tpci->DefineSection(1,-74.0,61.2,76.6774);
251 //
252 tpci->DefineSection(2,74.0,61.2,76.6774);
253 //
254 tpci->DefineSection(3,253.6,65.9,76.6774);
255 //
256 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
257 //
258 // now the inner field cage - only part of flanges (2 copies)
259 //
260 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
261 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
262 //
263 //---------------------------------------------------------
264 // Tpc Inner Containment vessel - Muon side
265 //---------------------------------------------------------
266 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
267 //
268 tcms->DefineSection(0,-259.1,68.1,74.2);
269 tcms->DefineSection(1,-253.6,68.1,74.2);
270 //
271 tcms->DefineSection(2,-253.6,68.1,68.4);
272 tcms->DefineSection(3,-74.0,60.9,61.2);
273 //
274 tcms->DefineSection(4,-74.0,60.1,61.2);
275 tcms->DefineSection(5,-73.3,60.1,61.2);
276 //
277 tcms->DefineSection(6,-73.3,56.9,61.2);
278 tcms->DefineSection(7,-73.0,56.9,61.2);
279 //
280 tcms->DefineSection(8,-73.0,56.9,58.8);
281 tcms->DefineSection(9,-71.3,56.9,58.8);
282 //
283 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
284 //-----------------------------------------------
285 // inner containment vessel - shaft side
286 //-----------------------------------------------
287 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
288 //
289 tcss->DefineSection(0,71.3,56.9,58.8);
290 tcss->DefineSection(1,73.0,56.9,58.8);
291 //
292 tcss->DefineSection(2,73.0,56.9,61.2);
293 tcss->DefineSection(3,73.3,56.9,61.2);
294 //
295 tcss->DefineSection(4,73.3,60.1,61.2);
296 tcss->DefineSection(5,74.0,60.1,61.2);
297 //
298 tcss->DefineSection(6,74.0,60.9,61.2);
299 tcss->DefineSection(7,253.6,65.6,65.9);
300 //
301 tcss->DefineSection(8,253.6,65.6,74.2);
302 tcss->DefineSection(9,258.1,65.6,74.2);
303 //
304 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
305 //-----------------------------------------------
306 // Inner field cage
307 // define 4 parts and make an assembly
308 //-----------------------------------------------
309 // part1 - Al - 2 copies
310 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
311 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
312 // sandwich - outermost parts - 2 copies
313 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
314 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
315 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
316 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
317 //
318 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
319 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
320 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
321 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
322 //
323 // middle parts - 2 copies
324 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
325 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
326 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
327 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
328 //
329 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
330 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
331 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
332 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
333 // central part - 1 copy
334 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
335 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
336 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
337 //
338 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
339 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
340 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
341 //
342 // inner part - positioning
343 //
344 // creating a sandwich
345 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
346 //
347 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
348 //
349 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
350 //
351 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
352 //
353 tv100->AddNode(tv10,1);
354 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
355 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
356 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
357 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
358 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
359 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
360 //
361 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
362 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
363 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
364 v9->AddNode(tv100,1);
365 //
366 // central drum
367 //
368 // flange + sandwich
369 //
370 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
371 cfl->DefineSection(0,-71.1,59.7,61.2);
372 cfl->DefineSection(1,-68.6,59.7,61.2);
373 //
374 cfl->DefineSection(2,-68.6,60.6324,61.2);
375 cfl->DefineSection(3,68.6,60.6324,61.2);
376 //
377 cfl->DefineSection(4,68.6,59.7,61.2);
378 cfl->DefineSection(5,71.1,59.7,61.2);
379 //
380 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
381 // sandwich
382 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
383 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
384 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
385 //
386 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
387 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
388 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
389 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
390 //
391 // seals for central drum 2 copies
392 //
393 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
394 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
395 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
3378c058 396 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
397 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
c1637e41 398 //
399 // seal collars
400 TGeoPcon *se = new TGeoPcon(0.,360.,6);
401 se->DefineSection(0,-72.8,59.7,61.2);
402 se->DefineSection(1,-72.3,59.7,61.2);
403 //
404 se->DefineSection(2,-72.3,58.85,61.2);
405 se->DefineSection(3,-71.6,58.85,61.2);
406 //
407 se->DefineSection(4,-71.6,59.7,61.2);
408 se->DefineSection(5,-71.3,59.7,61.2);
409 //
410 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
411 //
412 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
413 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
414 //
415 // define reflection matrix
416 //
4fa47888 417 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
c1637e41 418 //
419 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
420 //
a1ec4d07 421 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
422 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
c1637e41 423 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
424 //
425 // central membrane - 2 rings and a mylar membrane - assembly
426 //
427 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
428 TGeoTube *oh = new TGeoTube(250.,256.,.5);
429 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
430 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
431 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
432 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
433 //
434 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
435 cm->AddNode(ihv,1);
436 cm->AddNode(ohv,1);
437 cm->AddNode(memv,1);
438 v9->AddNode(cm,1);
439 //
440 // end caps - they are make as an assembly of single segments
441 // containing both readout chambers
442 //
d899e254 443 Double_t openingAngle = 10.*TMath::DegToRad();
c1637e41 444 Double_t thick=1.5; // rib
d899e254 445 Double_t shift = thick/TMath::Sin(openingAngle);
c1637e41 446 //
d899e254 447 Double_t lowEdge = 86.3; // hole in the wheel
448 Double_t upEdge = 240.4; // hole in the wheel
c1637e41 449 //
450 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
451 //
452 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
453 //
d899e254 454 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
455 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
c1637e41 456 //
d899e254 457 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
458 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
c1637e41 459 //
d899e254 460 Double_t ys = shift*TMath::Sin(openingAngle);
461 Double_t xs = shift*TMath::Cos(openingAngle);
c1637e41 462 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
463 tr->RegisterYourself();
464 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
465 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
466 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
467 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
468 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
469 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
470 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
471 //
472 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
473 //
474 // readout chambers
475 //
476 // IROC first
477 //
478 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
479 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
480 // empty space
481 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
482 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
483 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
484 //bars
485 Double_t tga = (19.8328-12.3742)/39.3;
486 Double_t xmin,xmax;
487 xmin = 9.55*tga+12.3742;
488 xmax = 9.95*tga+12.3742;
489 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
490 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
491 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
492 xmin=19.4*tga+12.3742;
493 xmax=19.9*tga+12.3742;
494 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
495 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
496 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
497 xmin=29.35*tga+12.3742;
498 xmax=29.75*tga+12.3742;
499 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
500 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
501 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
502 //
503 // holes for connectors
504 //
505 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
506 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
d9e80aca 507 TString fileName(gSystem->Getenv("ALICE_ROOT"));
508 fileName += "/TPC/conn_iroc.dat";
c1637e41 509 ifstream in;
d9e80aca 510 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 511 for(Int_t i =0;i<86;i++){
456cb019 512 Double_t y = 3.99;
c1637e41 513 Double_t x,z,ang;
514 in>>x>>z>>ang;
456cb019 515 z-=26.5;
c1637e41 516 TGeoRotation *rrr = new TGeoRotation();
517 rrr->RotateY(ang);
518 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
519 ibdv->AddNode(connv,i+1,trans);
520 }
521 in.close();
522 // "cap"
523 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
524 // "hole"
525 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
526 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
527 tr1->RegisterYourself();
528 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
529 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
530 //
531 // pad plane and wire fixations
532 //
533 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
534 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
535 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
536 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
537 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
538 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
539 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
540 //
541 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
542 //
543 iroc->AddNode(ibdv,1);
544 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
545 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
546 tga =(23.3521-14.5974)/49.65;
547 Double_t xx = 24.825*tga+14.5974-0.6;
548 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
549 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
550 //
551 // OROC
552 //
553 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
554 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
555 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
556 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
557 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
558 //horizontal bars
559 tga=(38.5084-20.2938)/99.3;
560 xmin=tga*10.2+20.2938;
561 xmax=tga*10.6+20.2938;
562 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
563 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
564 //
565 xmin=22.55*tga+20.2938;
566 xmax=24.15*tga+20.2938;
567 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
568 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
569 //
570 xmin=36.1*tga+20.2938;
571 xmax=36.5*tga+20.2938;
572 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
573 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
574 //
575 xmin=49.0*tga+20.2938;
576 xmax=50.6*tga+20.2938;
577 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
578 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
579 //
580 xmin=63.6*tga+20.2938;
581 xmax=64.0*tga+20.2938;
582 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
583 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
584 //
585 xmin=75.5*tga+20.2938;
586 xmax=77.15*tga+20.2938;
587 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
588 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
589 //
590 xmin=88.7*tga+20.2938;
591 xmax=89.1*tga+20.2938;
592 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
593 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
594 //
595 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
596 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
597 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
598 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
599 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
600 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
601 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
602 // vertical bars
603 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
604 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
605 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
606 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
607 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
608 //
609 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
610 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
611 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
612 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
613 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
614 //
615 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
616 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
617 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
618 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
619 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
620 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
621 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
622 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
623 //
624 // holes for connectors
625 //
d9e80aca 626 fileName = gSystem->Getenv("ALICE_ROOT");
627 fileName += "/TPC/conn_oroc.dat";
628 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 629 for(Int_t i =0;i<78;i++){
630 Double_t y =3.89;
631 Double_t x,z,ang;
632 Double_t x1,z1,x2,z2;
633 in>>x>>z>>ang;
634 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
635 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
636 //
637 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
638 //
639 TGeoRotation *rr = new TGeoRotation();
640 rr->RotateY(ang);
641 z1-=54.95;
642 z2-=54.95;
643 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
644 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
645 obdv->AddNode(connv,i+1,trans1);
646 obdv->AddNode(connv,i+79,trans2);
647 }
648 in.close();
649 // cap
650 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
651 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
652 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
653 tr5->RegisterYourself();
654 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
655 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
656 //
657 // pad plane and wire fixations
658 //
659 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
660 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
661 //
662 tga=(43.5239-23.3874)/114.2;
663 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
664 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
665 xx = 57.1*tga+23.3874-0.7;
666 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
667 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
668 //
669 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
670 //
671 oroc->AddNode(obdv,1);
672 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
673 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
674 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
675 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
676 //
677 // now iroc and oroc are placed into a sector...
678 //
a1ec4d07 679 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
680 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
c1637e41 681 TGeoRotation rot1("rot1",90.,90.,0.);
682 TGeoRotation rot2("rot2");
683 rot2.RotateY(10.);
684 TGeoRotation *rot = new TGeoRotation("rot");
685 *rot=rot1*rot2;
686 //
687 Double_t x0,y0;
d899e254 688 x0=110.2*TMath::Cos(openingAngle);
689 y0=110.2*TMath::Sin(openingAngle);
1bae4c82 690 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
691 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
d899e254 692 x0=188.45*TMath::Cos(openingAngle);
693 y0=188.45*TMath::Sin(openingAngle);
1bae4c82 694 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
695 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
c1637e41 696 //
c1637e41 697 //
a1ec4d07 698 // A-side
c1637e41 699 //
a1ec4d07 700 secta->AddNode(ch,1);
701 secta->AddNode(iroc,1,combi1a);
702 secta->AddNode(oroc,1,combi2a);
703 //
704 // C-side
705 //
706 sectc->AddNode(ch,1);
707 sectc->AddNode(iroc,1,combi1c);
708 sectc->AddNode(oroc,1,combi2c);
709 //
710 // now I try to make wheels...
711 //
712 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
713 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
c1637e41 714 //
715 for(Int_t i =0;i<18;i++){
716 Double_t phi = (20.*i);
717 TGeoRotation *r = new TGeoRotation();
718 r->RotateZ(phi);
a1ec4d07 719 wheela->AddNode(secta,i+1,r);
720 wheelc->AddNode(sectc,i+1,r);
79575d04 721
c1637e41 722 }
4fa47888 723 // wheels in the drift volume!
a1ec4d07 724
c1637e41 725 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
a1ec4d07 726 v9->AddNode(wheela,1,combi3);
727 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
c1637e41 728 //_____________________________________________________________
729 // service support wheel
730 //_____________________________________________________________
731 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
732 sw->DefineSection(0,-4.,80.5,251.75);
733 sw->DefineSection(1,4.,80.5,251.75);
734 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
735 //
736 thick=1.;
d899e254 737 shift = thick/TMath::Sin(openingAngle);
c1637e41 738 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
739 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
740 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
741 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
742 //
74518339 743 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
744 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
745 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
746 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
747 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
748 //
749 shv->AddNode(elv,1);
750 //
751 //
d899e254 752 ys = shift*TMath::Sin(openingAngle);
753 xs = shift*TMath::Cos(openingAngle);
c1637e41 754 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
755 // cover
756 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
757 co->DefineSection(0,-0.5,77.,255.25);
758 co->DefineSection(1,0.5,77.,255.25);
759 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
760 // hole in a cover
761 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
d899e254 762 shift=4./TMath::Sin(openingAngle);
c1637e41 763 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
764 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
765 //
766 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
767 //
d899e254 768 ys = shift*TMath::Sin(openingAngle);
769 xs = shift*TMath::Cos(openingAngle);
c1637e41 770 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
771 //
772 // Sector as an Assembly
773 //
774 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
775 swhs->AddNode(swv,1);
776 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
777 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
778 //
779 // SSW as an Assembly of sectors
780 //
781 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
782 for(Int_t i =0;i<18;i++){
783 Double_t phi = (20.*i);
784 TGeoRotation *r = new TGeoRotation();
785 r->RotateZ(phi);
786 swheel->AddNode(swhs,i+1,r);
787 }
788 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
789 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
790
791 // sensitive strips - strip "0" is always set
792 // conditional
793 Int_t totrows;
794 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
795 Double_t *upar;
796 upar=NULL;
797 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
798 upar=new Double_t [10];
799 upar[0]=0.;
800 upar[1]=360.;
801 upar[2]=18.;
802 upar[3]=2.;
803 //
804 upar[4]=-124.8;
805 upar[7]=124.8;
806
807 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
808
809 upar[5]=rlow;
810 upar[6]=rlow+.01;
811 upar[8]=upar[5];
812 upar[9]=upar[6];
813 //
814 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
815 gGeoManager->Node("TPC_Strip",totrows+1,
816 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
817 //
818 // now, strips optionally
819 //
820 if(fSens){
821 //lower sectors
822 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
823 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
824 upar[5]=rlow;
825 upar[6]=rlow+.01;
826 upar[8]=upar[5];
827 upar[9]=upar[6];
828 gGeoManager->Node("TPC_Strip",i,
829 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
830 gGeoManager->Node("TPC_Strip",totrows+i,
831 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
832 }
833 //upper sectors
834 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
835 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
836 upar[5]=rlow;
837 upar[6]=rlow+.01;
838 upar[8]=upar[5];
839 upar[9]=upar[6];
840 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
841 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
842 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
843 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
844 }
845 }//strips
37831078 846 //----------------------------------------------------------
c1637e41 847 // TPc Support Rods - MAKROLON
37831078 848 //----------------------------------------------------------
c1637e41 849 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
850 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
78134e48 851 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
852 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");
853 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
c1637e41 854 // upper and lower rods differ in length!
855 delete [] upar;
856 upar=NULL;
857 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
858 upar=new Double_t [3];
859 upar[0]=1.8;
860 upar[1]=2.2;
861
79575d04 862 //
c1637e41 863 //HV rods - makrolon + 0.58cm (diameter) Cu
ae4806ca 864 TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
c1637e41 865 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
866 //
867 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
868 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
869 hvrv->AddNode(hvcv,1);
78134e48 870 //
871 // resistor rods
872 //
873 TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner
874 TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer
875 TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
876 TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
877 //
878 TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
879 TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);
880 TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
881 TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);
882 //
883 // ceramic rod with water
884 //
885 criv->AddNode(cwiv,1);
886 crov->AddNode(cwov,1);
887 //
888 TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner
889 TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer
890 //
891 // peek rod
892 //
893 TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
894 TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12);
895 //
896 // resistor rods assembly
897 //
e90c9299 898 TGeoRotation* rotr = new TGeoRotation("rotr");
899 rotr->RotateZ(-21.);
78134e48 900 //
901 TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
902 TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
903 //
904 TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
905 TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);
906 //
a3d2be59 907 TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
908 TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
909 rrin->AddNode(rriv,1);
910 rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
911 rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.));
912 rrin->AddNode(priv,1);
913 //
914 rrou->AddNode(rrov,1);
915 rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
916 rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.));
917 rrou->AddNode(prov,1);
78134e48 918 //
7281dc07 919 for(Int_t i=0;i<18;i++){
c1637e41 920 Double_t angle,x,y;
921 Double_t z,r;
922 angle=TMath::DegToRad()*20.*(Double_t)i;
923 r=81.5;
924 x=r * TMath::Cos(angle);
925 y=r * TMath::Sin(angle);
926 upar[2]=126.64; //lower
927 z= 126.96;
78134e48 928 //
929 if(i==3){
e90c9299 930 v9->AddNode(rrin,1,new TGeoCombiTrans(x,y, z, rotr)); //A
931 v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z, rotr)); //C
78134e48 932 }
933 else {
934 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
935 gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
c1637e41 936 }
78134e48 937
938
939 //
c1637e41 940 r=254.25;
941 x=r * TMath::Cos(angle);
942 y=r * TMath::Sin(angle);
943 upar[2]=126.54; //upper
944 z=127.06;
78134e48 945 //
946 if(i==15){
4d34b9dc 947 //v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
948 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,127.14));//A-side only
e90c9299 949 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
78134e48 950 }
951 else if(i==11){
e90c9299 952 v9->AddNode(rrou,1,new TGeoCombiTrans(x,y, z, rotr)); //A
953 v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z, rotr)); //C
78134e48 954 }
955 else{
956 //
957 gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
958 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
959 }
c1637e41 960 }
79575d04 961
69776907 962 delete [] upar;
963
bde68ab0 964 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
965 alice->AddNode(v1,1);
c1637e41 966
37831078 967} // end of function
968
ac81c411 969//_____________________________________________________________________________
970void AliTPCv2::AddAlignableVolumes() const
971{
972 //
973 // Create entries for alignable volumes associating the symbolic volume
974 // name with the corresponding volume path. Needs to be syncronized with
975 // eventual changes in the geometry.
976 //
977 SetInnerChambersAlignable();
978 SetOuterChambersAlignable();
979}
980
981//_____________________________________________________________________________
982void AliTPCv2::SetInnerChambersAlignable() const
983{
984 //
cdf69b9a 985 AliGeomManager::ELayerID idTPC1 = AliGeomManager::kTPC1;
986 Int_t modUID, modnum = 0;
d899e254 987 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
988 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
989 TString vpappend = "/TPC_IROC_1";
990 TString snstr1="TPC/EndcapA/Sector";
991 TString snstr2="TPC/EndcapC/Sector";
992 TString snappend="/InnerChamber";
ac81c411 993 TString volpath, symname;
994
1ac29fc4 995 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 996 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
1ac29fc4 997 volpath = vpstr1;
998 volpath += cnt;
999 volpath += vpappend;
1000 symname = snstr1;
1001 symname += cnt;
1002 symname += snappend;
cdf69b9a 1003 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 1004 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 1005 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1006 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 1007 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
1008 alignableEntry->SetMatrix(matTtoL);
1ac29fc4 1009 }
65293f49 1010
ac81c411 1011 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 1012 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
d899e254 1013 volpath = vpstr2;
ac81c411 1014 volpath += cnt;
d899e254 1015 volpath += vpappend;
1016 symname = snstr2;
ac81c411 1017 symname += cnt;
d899e254 1018 symname += snappend;
cdf69b9a 1019 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 1020 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 1021 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1022 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 1023 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
1024 alignableEntry->SetMatrix(matTtoL);
ac81c411 1025 }
1026}
1027
ac81c411 1028//_____________________________________________________________________________
1029void AliTPCv2::SetOuterChambersAlignable() const
1030{
1031 //
cdf69b9a 1032 AliGeomManager::ELayerID idTPC2 = AliGeomManager::kTPC2;
1033 Int_t modUID, modnum = 0;
d899e254 1034 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1035 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1036 TString vpappend = "/TPC_OROC_1";
1037 TString snstr1="TPC/EndcapA/Sector";
1038 TString snstr2="TPC/EndcapC/Sector";
1039 TString snappend="/OuterChamber";
ac81c411 1040 TString volpath, symname;
1041
1042 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 1043 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
d899e254 1044 volpath = vpstr1;
ac81c411 1045 volpath += cnt;
d899e254 1046 volpath += vpappend;
1047 symname = snstr1;
ac81c411 1048 symname += cnt;
d899e254 1049 symname += snappend;
cdf69b9a 1050 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 1051 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 1052 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1053 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 1054 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
1055 alignableEntry->SetMatrix(matTtoL);
ac81c411 1056 }
84cbbd90 1057
ac81c411 1058 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 1059 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
d899e254 1060 volpath = vpstr2;
ac81c411 1061 volpath += cnt;
d899e254 1062 volpath += vpappend;
1063 symname = snstr2;
ac81c411 1064 symname += cnt;
d899e254 1065 symname += snappend;
cdf69b9a 1066 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 1067 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 1068 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1069 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 1070 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
1071 alignableEntry->SetMatrix(matTtoL);
ac81c411 1072 }
1073}
1074
37831078 1075//_____________________________________________________________________________
d899e254 1076void AliTPCv2::DrawDetector() const
37831078 1077{
1078 //
1079 // Draw a shaded view of the Time Projection Chamber version 1
1080 //
1081
1082 // Set everything unseen
1083 gMC->Gsatt("*", "seen", -1);
1084 //
1085 // Set ALIC mother transparent
1086 gMC->Gsatt("ALIC","SEEN",0);
1087 //
1088 // Set the volumes visible
1089 //
1090
1091 gMC->Gsatt("TPC ","SEEN",0);
1092 gMC->Gsatt("TOIN","SEEN",1);
1093 gMC->Gsatt("TOIN","COLO",7);
37831078 1094 gMC->Gsatt("TOCV","SEEN",1);
1095 gMC->Gsatt("TOCV","COLO",4);
1096 gMC->Gsatt("TSA1","SEEN",0);
1097 gMC->Gsatt("TSA2","SEEN",0);
1098 gMC->Gsatt("TSA3","SEEN",0);
79575d04 1099 gMC->Gsatt("TSA4","SEEN",0);
1100 gMC->Gsatt("TSA5","SEEN",0);
37831078 1101 gMC->Gsatt("TOFC","SEEN",1);
1102 gMC->Gsatt("TOFC","COLO",4);
37831078 1103 gMC->Gsatt("TSA6","SEEN",0);
1104 gMC->Gsatt("TSA7","SEEN",0);
79575d04 1105 gMC->Gsatt("TSA8","SEEN",0);
37831078 1106 gMC->Gsatt("TIIN","SEEN",1);
79575d04 1107 gMC->Gsatt("TIIN","COLO",7);
1108 gMC->Gsatt("TII1","SEEN",0);
1109 gMC->Gsatt("TIFC","SEEN",1);
1110 gMC->Gsatt("TIFC","COLO",4);
1111 gMC->Gsatt("TSA9","SEEN",0);
37831078 1112 gMC->Gsatt("TS10","SEEN",0);
1113 gMC->Gsatt("TS11","SEEN",0);
1114 gMC->Gsatt("TS12","SEEN",0);
37831078 1115 gMC->Gsatt("TS13","SEEN",0);
1116 gMC->Gsatt("TS14","SEEN",0);
79575d04 1117 gMC->Gsatt("TICC","SEEN",0);
1118 gMC->Gsatt("TICM","SEEN",0);
37831078 1119 gMC->Gsatt("TS15","SEEN",0);
1120 gMC->Gsatt("TS16","SEEN",0);
37831078 1121 gMC->Gsatt("TS17","SEEN",0);
79575d04 1122 gMC->Gsatt("TS18","SEEN",0);
1123 gMC->Gsatt("TS19","SEEN",0);
1124 gMC->Gsatt("TPJ1","SEEN",0);
1125 gMC->Gsatt("TPJ2","SEEN",0);
1126 gMC->Gsatt("TICS","SEEN",0);
1127 gMC->Gsatt("TDGN","SEEN",0);
37831078 1128 gMC->Gsatt("TIRC","SEEN",0);
1129 gMC->Gsatt("TIC1","SEEN",1);
1130 gMC->Gsatt("TIPP","SEEN",0);
1131 gMC->Gsatt("TIC3","SEEN",0);
1132 gMC->Gsatt("TRCE","SEEN",0);
1133 gMC->Gsatt("TPSC","SEEN",0);
79575d04 1134 gMC->Gsatt("TPCC","SEEN",0);
37831078 1135 gMC->Gsatt("TORC","SEEN",0);
1136 gMC->Gsatt("TOPP","SEEN",0);
1137 gMC->Gsatt("TOC3","SEEN",0);
1138 gMC->Gsatt("TOC1","SEEN",1);
1139 gMC->Gsatt("TSSW","SEEN",1);
1140 gMC->Gsatt("TSWC","SEEN",1);
37831078 1141 gMC->Gsatt("TSSW","COLO",3);
1142 gMC->Gsatt("TSWC","COLO",3);
1143 gMC->Gsatt("TSCE","COLO",6);
79575d04 1144 gMC->Gsatt("TSCE","SEEN",1);
37831078 1145 gMC->Gsatt("TWES","SEEN",0);
1146 gMC->Gsatt("TSWB","SEEN",0);
1147 gMC->Gsatt("TPEL","SEEN",0);
1148 gMC->Gsatt("TPMW","SEEN",1);
37831078 1149 gMC->Gsatt("TESR","SEEN",1);
1150 gMC->Gsatt("TPMW","COLO",12);
37831078 1151 gMC->Gsatt("TIC1","COLO",5);
79575d04 1152 gMC->Gsatt("TOC1","COLO",5);
37831078 1153 gMC->Gsatt("TESB","SEEN",0);
37831078 1154 gMC->Gsatt("THVM","SEEN",1);
1155 gMC->Gsatt("THVM","COLO",11);
79575d04 1156 gMC->Gsatt("THVH","SEEN",0);
1157 gMC->Gsatt("TPSR","SEEN",0);
37831078 1158 gMC->Gsatt("THVL","SEEN",0);
79575d04 1159 gMC->Gsatt("THVC","SEEN",0);
37831078 1160 gMC->Gsatt("THVE","SEEN",0);
1161 gMC->Gsatt("THVR","SEEN",0);
79575d04 1162 gMC->Gsatt("TPSS","SEEN",0);
1163 gMC->Gsatt("TPUS","SEEN",0);
1164 gMC->Gsatt("TPLS","SEEN",0);
37831078 1165
1166 //
1167 gMC->Gdopt("hide", "on");
1168 gMC->Gdopt("shad", "on");
1169 gMC->Gsatt("*", "fill", 7);
1170 gMC->SetClipBox(".");
1171 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1172 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1173 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1174 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1175 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1176 gMC->DefaultRange();
1177 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1178 gMC->Gdhead(1111, "Time Projection Chamber");
1179 gMC->Gdman(18, 4, "MAN");
1180 gMC->Gdopt("hide","off");
1181}
1182
1183//_____________________________________________________________________________
1184void AliTPCv2::CreateMaterials()
1185{
1186 //
1187 // Define materials for version 2 of the Time Projection Chamber
1188 //
1189
1190 AliTPC::CreateMaterials();
1191}
1192
1193//_____________________________________________________________________________
1194void AliTPCv2::Init()
1195{
1196 //
1197 // Initialises version 2 of the TPC after that it has been built
1198 //
1199
1200 Int_t *idtmed = fIdtmed->GetArray();
1201
1202 AliTPC::Init();
d4c354b9 1203
c1637e41 1204
1205 fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected...
d4c354b9 1206
c1637e41 1207 fIDrift=gMC->VolId("TPC_Drift");
1208 fSecOld=-100; // fake number
37831078 1209
d9888f70 1210 gMC->SetMaxNStep(-30000); // max. number of steps increased
37831078 1211
4481461d 1212 if (fPrimaryIonisation) {
1213 gMC->Gstpar(idtmed[2],"PRIMIO_E", 20.77); // 1st ionisation potential
1214
1215 gMC->Gstpar(idtmed[2],"PRIMIO_N", 14.35);
1216 gMC->Gstpar(idtmed[2],"LOSS", 14); // specific energy loss
8143dfb2 1217 gMC->Gstpar(idtmed[2],"STRA",4);
4481461d 1218 } else {
1219 gMC->Gstpar(idtmed[2],"LOSS", 5); // specific energy loss
1220 }
1221
37831078 1222
f77f13c8 1223 AliInfo("*** TPC version 2 initialized ***");
1224 AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
37831078 1225
1226 //
fe4da5cc 1227
1228}
1229
1230//_____________________________________________________________________________
1231void AliTPCv2::StepManager()
1232{
1233 //
1234 // Called for every step in the Time Projection Chamber
1235 //
1236
1237 //
1238 // parameters used for the energy loss calculations
1239 //
73042f01 1240 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1241 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1242 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
ec6ac410 1243 const Int_t kMaxDistRef =15; // maximal difference between 2 stored references
fe4da5cc 1244
73042f01 1245 const Float_t kbig = 1.e10;
fe4da5cc 1246
1247 Int_t id,copy;
e61fd20d 1248 Float_t hits[5];
fe4da5cc 1249 Int_t vol[2];
37831078 1250 TLorentzVector p;
fe4da5cc 1251
37831078 1252 vol[1]=0; // preset row number to 0
fe4da5cc 1253 //
b97617a6 1254 if (fPrimaryIonisation) gMC->SetMaxStep(kbig);
fe4da5cc 1255
0a6d8768 1256 if(!gMC->IsTrackAlive()) return; // particle has disappeared
fe4da5cc 1257
cfce8870 1258 Float_t charge = gMC->TrackCharge();
fe4da5cc 1259
1260 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1261
37831078 1262 // check the sensitive volume
1263
c1637e41 1264 id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1265 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
da33556f 1266
c1637e41 1267 gMC->TrackPosition(p);
1268 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1269 //
1270
1271 //
1272 Double_t angle = TMath::ACos(p[0]/r);
1273 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1274 //
1275 // angular segment, it is not a real sector number...
1276 //
1277 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1278 fTPCParam->GetInnerAngle());
1279 // rotate to segment "0"
1280 Float_t cos,sin;
1281 fTPCParam->AdjustCosSin(sector,cos,sin);
1282 Float_t x1=p[0]*cos + p[1]*sin;
1283 // check if within sector's limits
5bd5dbc4 1284 if((x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp())
1285 ||(x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp())){
c1637e41 1286 // calculate real sector number...
1287 if (x1>fTPCParam->GetOuterRadiusLow()){
1288 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1289 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1290 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
37831078 1291 }
c1637e41 1292 else
1293 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1294 //
1295 // here I have a sector number
1296 //
37831078 1297
c1637e41 1298 vol[0]=sector;
ec6ac410 1299
1300 static Double_t lastReferenceR=0;
1301 if (TMath::Abs(lastReferenceR-r)>kMaxDistRef){
1302 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
1303 lastReferenceR = r;
1304 }
1305
c1637e41 1306 // check if change of sector
1307 if(sector != fSecOld){
1308 fSecOld=sector;
1309 // add track reference
e6add757 1310 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
c1637e41 1311 }
1312 // track is in the sensitive strip
1313 if(id == fIdSens){
1314 // track is entering the strip
1315 if (gMC->IsTrackEntering()){
1316 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1317 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1318 // row numbers are autonomous for lower and upper sectors
1319 if(vol[0] > fTPCParam->GetNInnerSector()) {
1320 vol[1] -= fTPCParam->GetNRowLow();
1321 }
1322 //
1323 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
37831078 1324
c1637e41 1325 // lower sector, row 0, because Jouri wants to have this
37831078 1326
c1637e41 1327 gMC->TrackMomentum(p);
1328 hits[0]=p[0];
1329 hits[1]=p[1];
1330 hits[2]=p[2];
1331 hits[3]=0.; // this hit has no energy loss
1332 // Get also the track time for pileup simulation
1333 hits[4]=gMC->TrackTime();
6a905708 1334
c1637e41 1335 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1336 }
1337 //
e61fd20d 1338
c1637e41 1339 gMC->TrackPosition(p);
1340 hits[0]=p[0];
1341 hits[1]=p[1];
1342 hits[2]=p[2];
1343 hits[3]=0.; // this hit has no energy loss
1344 // Get also the track time for pileup simulation
1345 hits[4]=gMC->TrackTime();
930ee558 1346
c1637e41 1347 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
37831078 1348
c1637e41 1349 }
1350 else return;
1351 }
37831078 1352 //-----------------------------------------------------------------
c1637e41 1353 // charged particle is in the sensitive drift volume
37831078 1354 //-----------------------------------------------------------------
cfce8870 1355 if(gMC->TrackStep() > 0) {
b97617a6 1356 Int_t nel=0;
1357 if (!fPrimaryIonisation) {
1358 nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1359 }
1360 else {
1361 Float_t edep = gMC->Edep();
1362 if (edep > 0.) nel = (Int_t)((gMC->Edep()*1.5)/kwIon) + 1;
1363 }
fe4da5cc 1364 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
c1637e41 1365 //
37831078 1366 gMC->TrackPosition(p);
1367 hits[0]=p[0];
1368 hits[1]=p[1];
1369 hits[2]=p[2];
fe4da5cc 1370 hits[3]=(Float_t)nel;
c1637e41 1371
fe4da5cc 1372 // Add this hit
c1637e41 1373
6a905708 1374 if (fHitType&&2){
1375 gMC->TrackMomentum(p);
1376 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1377 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
1378 fTrackHits->SetHitPrecision(precision);
1379 }
e61fd20d 1380
1381 // Get also the track time for pileup simulation
1382 hits[4]=gMC->TrackTime();
c1637e41 1383
1384 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
e61fd20d 1385
c1637e41 1386 } // step>0
1387 } //within sector's limits
fe4da5cc 1388 // Stemax calculation for the next step
1389
1390 Float_t pp;
0a6d8768 1391 TLorentzVector mom;
b97617a6 1392 // below is valid only for Geant3 (fPromaryIonisation not set)
1393 if(!fPrimaryIonisation){
1394 gMC->TrackMomentum(mom);
1395 Float_t ptot=mom.Rho();
1396 Float_t betaGamma = ptot/gMC->TrackMass();
595bf2c3 1397
b97617a6 1398 Int_t pid=gMC->TrackPid();
1399 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1400 {
1401 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1402 }
1403 else
1404 {
1405
1406 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
b40afa5e 1407 pp=kprim*AliMathBase::BetheBlochAleph(betaGamma);
595bf2c3 1408
fe4da5cc 1409 }
1410
b97617a6 1411 Double_t rnd = gMC->GetRandom()->Rndm();
fe4da5cc 1412
b97617a6 1413 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1414 }
c1637e41 1415
fe4da5cc 1416}
1417
73042f01 1418