Urgent fixes by Levente
[u/mrichter/AliRoot.git] / TPC / AliTPCv2.cxx
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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//
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"
e6add757 38#include "AliTrackReference.h"
73042f01 39#include "AliTPCParam.h"
4ed5dced 40#include "AliTPCTrackHitsV2.h"
116cbefd 41#include "AliTPCv2.h"
cdf69b9a 42#include "AliGeomManager.h"
c1637e41 43#include "TGeoVolume.h"
44#include "TGeoPcon.h"
45#include "TGeoTube.h"
46#include "TGeoPgon.h"
47#include "TGeoTrd1.h"
48#include "TGeoCompositeShape.h"
49#include "TGeoPara.h"
1ac29fc4 50#include "TGeoPhysicalNode.h"
51
fe4da5cc 52ClassImp(AliTPCv2)
53
54//_____________________________________________________________________________
55AliTPCv2::AliTPCv2(const char *name, const char *title) :
e046d791 56 AliTPC(name, title),
57 fIdSens(0),
58 fIDrift(0),
59 fSecOld(0)
fe4da5cc 60{
61 //
62 // Standard constructor for Time Projection Chamber version 2
63 //
37831078 64
73042f01 65
c1637e41 66 SetBufferSize(128000);
73042f01 67
73042f01 68
69 if (fTPCParam)
70 fTPCParam->Write(fTPCParam->GetTitle());
fe4da5cc 71}
72
73//_____________________________________________________________________________
74void AliTPCv2::CreateGeometry()
75{
76 //
77 // Create the geometry of Time Projection Chamber version 2
78 //
79 //Begin_Html
80 /*
37831078 81 <img src="picts/AliTPC.gif">
fe4da5cc 82 */
83 //End_Html
84 //Begin_Html
85 /*
1439f98e 86 <img src="picts/AliTPCv2Tree.gif">
fe4da5cc 87 */
88 //End_Html
89
c1637e41 90 //----------------------------------------------------------
91 // This geometry is written using TGeo class
92 // Firstly the shapes are defined, and only then the volumes
93 // What is recognized by the MC are volumes
94 //----------------------------------------------------------
37831078 95 //
c1637e41 96 // tpc - this will be the mother volume
37831078 97 //
79575d04 98
37831078 99 //
c1637e41 100 // here I define a volume TPC
101 // retrive the medium name with "TPC_" as a leading string
37831078 102 //
78134e48 103 TGeoPcon *tpc = new TGeoPcon(0.,360.,20); //20 sections
37831078 104 //
78134e48 105 tpc->DefineSection(0,-291.,77.,278.);
106 tpc->DefineSection(1,-270,77.,278.);
37831078 107 //
78134e48 108 tpc->DefineSection(2,-270.,77.,278.);
109 tpc->DefineSection(3,-259.6,70.,278.);
37831078 110 //
78134e48 111 tpc->DefineSection(4,-259.6,68.1,278.);
112 tpc->DefineSection(5,-253.6,68.1,278.);
37831078 113 //
78134e48 114 tpc->DefineSection(6,-253.6,68.,278.);
115 tpc->DefineSection(7,-74.0,60.8,278.);
37831078 116 //
78134e48 117 tpc->DefineSection(8,-74.0,60.1,278.);
118 tpc->DefineSection(9,-73.3,60.1,278.);
37831078 119 //
78134e48 120 tpc->DefineSection(10,-73.3,56.9,278.);
121 tpc->DefineSection(11,73.3,56.9,278.);
37831078 122 //
78134e48 123 tpc->DefineSection(12,73.3,60.1,278.);
124 tpc->DefineSection(13,74.0,60.1,278.);
37831078 125 //
78134e48 126 tpc->DefineSection(14,74.0,60.8,278.);
127 tpc->DefineSection(15,253.6,65.5,278.);
128 //
129 tpc->DefineSection(16,253.6,65.6,278.);
130 tpc->DefineSection(17,259.6,65.6,278.);
131 //
132 tpc->DefineSection(18,259.6,70.0,278.);
133 tpc->DefineSection(19,291.,77.,278.);
37831078 134 //
c1637e41 135 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
136 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
79575d04 137 //
c1637e41 138 // drift volume - sensitive volume, extended beyond the
139 // endcaps, because of the alignment
37831078 140 //
c1637e41 141 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
142 dvol->DefineSection(0,-260.,74.5,264.4);
143 dvol->DefineSection(1,-253.6,74.5,264.4);
37831078 144 //
c1637e41 145 dvol->DefineSection(2,-253.6,76.6774,258.);
146 dvol->DefineSection(3,253.6,76.6774,258.);
37831078 147 //
c1637e41 148 dvol->DefineSection(4,253.6,74.5,264.4);
149 dvol->DefineSection(5,260.,74.5,264.4);
37831078 150 //
c1637e41 151 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
152 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
37831078 153 //
c1637e41 154 v1->AddNode(v9,1);
37831078 155 //
c1637e41 156 // outer insulator
720b23b8 157 //
c1637e41 158 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
79575d04 159 //
c1637e41 160 tpco->DefineSection(0,-256.6,264.8,278.);
161 tpco->DefineSection(1,-253.6,264.8,278.);
162 //
163 tpco->DefineSection(2,-253.6,258.,278.);
164 tpco->DefineSection(3,250.6,258.,278.);
165 //
166 tpco->DefineSection(4,250.6,258.,275.5);
167 tpco->DefineSection(5,253.6,258.,275.5);
168 //
169 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
170 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
171 //
172 // outer containment vessel
173 //
174 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
175 //
176 tocv->DefineSection(0,-256.6,264.8,278.);
177 tocv->DefineSection(1,-253.6,264.8,278.);
178 //
179 tocv->DefineSection(2,-253.6,274.8124,278.);
180 tocv->DefineSection(3,247.6,274.8124,278.);
181 //
182 tocv->DefineSection(4,247.6,270.4,278.);
183 tocv->DefineSection(5,250.6,270.4,278.);
184 //
185 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
186 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
187 //
188 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
189 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
190 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
191 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
192 //
193 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
194 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
195 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
196 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
197 //
198 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
199 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
200 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
201 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
202 //-------------------------------------------------------
37831078 203 // Tpc Outer Field Cage
c1637e41 204 // daughters - composite (sandwich)
37831078 205 //-------------------------------------------------------
1283eee5 206
c1637e41 207 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
79575d04 208 //
c1637e41 209 tofc->DefineSection(0,-253.6,258.,269.6);
210 tofc->DefineSection(1,-250.6,258.,269.6);
37831078 211 //
c1637e41 212 tofc->DefineSection(2,-250.6,258.,260.0676);
213 tofc->DefineSection(3,250.6,258.,260.0676);
37831078 214 //
c1637e41 215 tofc->DefineSection(4,250.6,258.,275.5);
216 tofc->DefineSection(5,253.6,258.,275.5);
37831078 217 //
c1637e41 218 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
219 //sandwich
220 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
221 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
222 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
37831078 223 //
c1637e41 224 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
37831078 225 //
c1637e41 226 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
227 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
228 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
37831078 229 //
c1637e41 230 // outer part - positioning
37831078 231 //
c1637e41 232 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
37831078 233 //
c1637e41 234 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
37831078 235 //
456cb019 236 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
37831078 237 //
c1637e41 238 v2->AddNode(v3,1); v2->AddNode(v4,1);
37831078 239 //
c1637e41 240 v1->AddNode(v2,1);
241 //--------------------------------------------------------------------
242 // Tpc Inner INsulator (CO2)
243 // the cones, the central drum and the inner f.c. sandwich with a piece
244 // of the flane will be placed in the TPC
245 //--------------------------------------------------------------------
246 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
37831078 247 //
c1637e41 248 tpci->DefineSection(0,-253.6,68.4,76.6774);
249 tpci->DefineSection(1,-74.0,61.2,76.6774);
37831078 250 //
c1637e41 251 tpci->DefineSection(2,74.0,61.2,76.6774);
37831078 252 //
c1637e41 253 tpci->DefineSection(3,253.6,65.9,76.6774);
37831078 254 //
c1637e41 255 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
37831078 256 //
c1637e41 257 // now the inner field cage - only part of flanges (2 copies)
37831078 258 //
c1637e41 259 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
260 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
37831078 261 //
c1637e41 262 //---------------------------------------------------------
263 // Tpc Inner Containment vessel - Muon side
79575d04 264 //---------------------------------------------------------
c1637e41 265 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
37831078 266 //
c1637e41 267 tcms->DefineSection(0,-259.1,68.1,74.2);
268 tcms->DefineSection(1,-253.6,68.1,74.2);
37831078 269 //
c1637e41 270 tcms->DefineSection(2,-253.6,68.1,68.4);
271 tcms->DefineSection(3,-74.0,60.9,61.2);
37831078 272 //
c1637e41 273 tcms->DefineSection(4,-74.0,60.1,61.2);
274 tcms->DefineSection(5,-73.3,60.1,61.2);
37831078 275 //
c1637e41 276 tcms->DefineSection(6,-73.3,56.9,61.2);
277 tcms->DefineSection(7,-73.0,56.9,61.2);
37831078 278 //
c1637e41 279 tcms->DefineSection(8,-73.0,56.9,58.8);
280 tcms->DefineSection(9,-71.3,56.9,58.8);
37831078 281 //
c1637e41 282 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
283 //-----------------------------------------------
284 // inner containment vessel - shaft side
285 //-----------------------------------------------
286 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
37831078 287 //
c1637e41 288 tcss->DefineSection(0,71.3,56.9,58.8);
289 tcss->DefineSection(1,73.0,56.9,58.8);
1283eee5 290 //
c1637e41 291 tcss->DefineSection(2,73.0,56.9,61.2);
292 tcss->DefineSection(3,73.3,56.9,61.2);
293 //
294 tcss->DefineSection(4,73.3,60.1,61.2);
295 tcss->DefineSection(5,74.0,60.1,61.2);
1283eee5 296 //
c1637e41 297 tcss->DefineSection(6,74.0,60.9,61.2);
298 tcss->DefineSection(7,253.6,65.6,65.9);
37831078 299 //
c1637e41 300 tcss->DefineSection(8,253.6,65.6,74.2);
301 tcss->DefineSection(9,258.1,65.6,74.2);
1283eee5 302 //
c1637e41 303 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
304 //-----------------------------------------------
305 // Inner field cage
306 // define 4 parts and make an assembly
307 //-----------------------------------------------
308 // part1 - Al - 2 copies
309 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
310 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
311 // sandwich - outermost parts - 2 copies
312 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
313 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
314 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
315 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
1283eee5 316 //
c1637e41 317 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
318 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
319 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
320 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
37831078 321 //
c1637e41 322 // middle parts - 2 copies
323 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
324 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
325 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
326 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
79575d04 327 //
c1637e41 328 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
329 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
330 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
331 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
332 // central part - 1 copy
333 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
334 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
335 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
79575d04 336 //
c1637e41 337 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
338 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
339 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
79575d04 340 //
c1637e41 341 // inner part - positioning
79575d04 342 //
c1637e41 343 // creating a sandwich
344 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
79575d04 345 //
c1637e41 346 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
79575d04 347 //
c1637e41 348 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
37831078 349 //
c1637e41 350 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
37831078 351 //
c1637e41 352 tv100->AddNode(tv10,1);
353 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
354 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
355 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
356 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
357 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
358 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
359 //
360 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
361 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
362 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
363 v9->AddNode(tv100,1);
364 //
365 // central drum
366 //
367 // flange + sandwich
368 //
369 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
370 cfl->DefineSection(0,-71.1,59.7,61.2);
371 cfl->DefineSection(1,-68.6,59.7,61.2);
372 //
373 cfl->DefineSection(2,-68.6,60.6324,61.2);
374 cfl->DefineSection(3,68.6,60.6324,61.2);
375 //
376 cfl->DefineSection(4,68.6,59.7,61.2);
377 cfl->DefineSection(5,71.1,59.7,61.2);
378 //
379 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
380 // sandwich
381 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
382 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
383 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
384 //
385 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
386 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
387 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
388 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
389 //
390 // seals for central drum 2 copies
391 //
392 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
393 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
394 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
3378c058 395 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
396 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
c1637e41 397 //
398 // seal collars
399 TGeoPcon *se = new TGeoPcon(0.,360.,6);
400 se->DefineSection(0,-72.8,59.7,61.2);
401 se->DefineSection(1,-72.3,59.7,61.2);
402 //
403 se->DefineSection(2,-72.3,58.85,61.2);
404 se->DefineSection(3,-71.6,58.85,61.2);
405 //
406 se->DefineSection(4,-71.6,59.7,61.2);
407 se->DefineSection(5,-71.3,59.7,61.2);
408 //
409 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
410 //
411 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
412 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
413 //
414 // define reflection matrix
415 //
4fa47888 416 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
c1637e41 417 //
418 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
419 //
a1ec4d07 420 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
421 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
c1637e41 422 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
423 //
424 // central membrane - 2 rings and a mylar membrane - assembly
425 //
426 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
427 TGeoTube *oh = new TGeoTube(250.,256.,.5);
428 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
429 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
430 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
431 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
432 //
433 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
434 cm->AddNode(ihv,1);
435 cm->AddNode(ohv,1);
436 cm->AddNode(memv,1);
437 v9->AddNode(cm,1);
438 //
439 // end caps - they are make as an assembly of single segments
440 // containing both readout chambers
441 //
d899e254 442 Double_t openingAngle = 10.*TMath::DegToRad();
c1637e41 443 Double_t thick=1.5; // rib
d899e254 444 Double_t shift = thick/TMath::Sin(openingAngle);
c1637e41 445 //
d899e254 446 Double_t lowEdge = 86.3; // hole in the wheel
447 Double_t upEdge = 240.4; // hole in the wheel
c1637e41 448 //
449 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
450 //
451 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
452 //
d899e254 453 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
454 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
c1637e41 455 //
d899e254 456 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
457 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
c1637e41 458 //
d899e254 459 Double_t ys = shift*TMath::Sin(openingAngle);
460 Double_t xs = shift*TMath::Cos(openingAngle);
c1637e41 461 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
462 tr->RegisterYourself();
463 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
464 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
465 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
466 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
467 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
468 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
469 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
470 //
471 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
472 //
473 // readout chambers
474 //
475 // IROC first
476 //
477 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
478 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
37831078 479 // empty space
c1637e41 480 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
481 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
482 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
483 //bars
484 Double_t tga = (19.8328-12.3742)/39.3;
485 Double_t xmin,xmax;
486 xmin = 9.55*tga+12.3742;
487 xmax = 9.95*tga+12.3742;
488 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
489 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
490 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
491 xmin=19.4*tga+12.3742;
492 xmax=19.9*tga+12.3742;
493 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
494 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
495 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
496 xmin=29.35*tga+12.3742;
497 xmax=29.75*tga+12.3742;
498 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
499 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
500 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
501 //
502 // holes for connectors
503 //
504 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
505 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
d9e80aca 506 TString fileName(gSystem->Getenv("ALICE_ROOT"));
507 fileName += "/TPC/conn_iroc.dat";
c1637e41 508 ifstream in;
d9e80aca 509 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 510 for(Int_t i =0;i<86;i++){
456cb019 511 Double_t y = 3.99;
c1637e41 512 Double_t x,z,ang;
513 in>>x>>z>>ang;
456cb019 514 z-=26.5;
c1637e41 515 TGeoRotation *rrr = new TGeoRotation();
516 rrr->RotateY(ang);
517 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
518 ibdv->AddNode(connv,i+1,trans);
519 }
520 in.close();
521 // "cap"
522 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
523 // "hole"
524 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
525 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
526 tr1->RegisterYourself();
527 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
528 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
529 //
530 // pad plane and wire fixations
531 //
532 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
533 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
534 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
535 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
536 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
537 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
538 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
539 //
540 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
541 //
542 iroc->AddNode(ibdv,1);
543 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
544 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
545 tga =(23.3521-14.5974)/49.65;
546 Double_t xx = 24.825*tga+14.5974-0.6;
547 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
548 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
549 //
550 // OROC
551 //
552 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
553 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
554 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
555 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
556 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
557 //horizontal bars
558 tga=(38.5084-20.2938)/99.3;
559 xmin=tga*10.2+20.2938;
560 xmax=tga*10.6+20.2938;
561 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
562 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
563 //
564 xmin=22.55*tga+20.2938;
565 xmax=24.15*tga+20.2938;
566 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
567 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
568 //
569 xmin=36.1*tga+20.2938;
570 xmax=36.5*tga+20.2938;
571 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
572 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
573 //
574 xmin=49.0*tga+20.2938;
575 xmax=50.6*tga+20.2938;
576 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
577 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
578 //
579 xmin=63.6*tga+20.2938;
580 xmax=64.0*tga+20.2938;
581 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
582 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
583 //
584 xmin=75.5*tga+20.2938;
585 xmax=77.15*tga+20.2938;
586 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
587 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
588 //
589 xmin=88.7*tga+20.2938;
590 xmax=89.1*tga+20.2938;
591 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
592 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
593 //
594 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
595 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
596 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
597 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
598 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
599 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
600 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
601 // vertical bars
602 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
603 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
604 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
605 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
606 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
607 //
608 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
609 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
610 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
611 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
612 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
613 //
614 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
615 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
616 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
617 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
618 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
619 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
620 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
621 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
622 //
623 // holes for connectors
624 //
d9e80aca 625 fileName = gSystem->Getenv("ALICE_ROOT");
626 fileName += "/TPC/conn_oroc.dat";
627 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 628 for(Int_t i =0;i<78;i++){
629 Double_t y =3.89;
630 Double_t x,z,ang;
631 Double_t x1,z1,x2,z2;
632 in>>x>>z>>ang;
633 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
634 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
635 //
636 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
637 //
638 TGeoRotation *rr = new TGeoRotation();
639 rr->RotateY(ang);
640 z1-=54.95;
641 z2-=54.95;
642 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
643 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
644 obdv->AddNode(connv,i+1,trans1);
645 obdv->AddNode(connv,i+79,trans2);
646 }
647 in.close();
648 // cap
649 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
650 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
651 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
652 tr5->RegisterYourself();
653 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
654 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
655 //
656 // pad plane and wire fixations
657 //
658 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
659 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
660 //
661 tga=(43.5239-23.3874)/114.2;
662 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
663 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
664 xx = 57.1*tga+23.3874-0.7;
665 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
666 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
667 //
668 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
669 //
670 oroc->AddNode(obdv,1);
671 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
672 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
673 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
674 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
675 //
676 // now iroc and oroc are placed into a sector...
677 //
a1ec4d07 678 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
679 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
c1637e41 680 TGeoRotation rot1("rot1",90.,90.,0.);
681 TGeoRotation rot2("rot2");
682 rot2.RotateY(10.);
683 TGeoRotation *rot = new TGeoRotation("rot");
684 *rot=rot1*rot2;
685 //
686 Double_t x0,y0;
d899e254 687 x0=110.2*TMath::Cos(openingAngle);
688 y0=110.2*TMath::Sin(openingAngle);
1bae4c82 689 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
690 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
d899e254 691 x0=188.45*TMath::Cos(openingAngle);
692 y0=188.45*TMath::Sin(openingAngle);
1bae4c82 693 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
694 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
c1637e41 695 //
c1637e41 696 //
a1ec4d07 697 // A-side
c1637e41 698 //
a1ec4d07 699 secta->AddNode(ch,1);
700 secta->AddNode(iroc,1,combi1a);
701 secta->AddNode(oroc,1,combi2a);
702 //
703 // C-side
704 //
705 sectc->AddNode(ch,1);
706 sectc->AddNode(iroc,1,combi1c);
707 sectc->AddNode(oroc,1,combi2c);
708 //
709 // now I try to make wheels...
710 //
711 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
712 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
c1637e41 713 //
714 for(Int_t i =0;i<18;i++){
715 Double_t phi = (20.*i);
716 TGeoRotation *r = new TGeoRotation();
717 r->RotateZ(phi);
a1ec4d07 718 wheela->AddNode(secta,i+1,r);
719 wheelc->AddNode(sectc,i+1,r);
c1637e41 720
721 }
4fa47888 722 // wheels in the drift volume!
a1ec4d07 723
c1637e41 724 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
a1ec4d07 725 v9->AddNode(wheela,1,combi3);
726 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
c1637e41 727 //_____________________________________________________________
728 // service support wheel
729 //_____________________________________________________________
730 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
731 sw->DefineSection(0,-4.,80.5,251.75);
732 sw->DefineSection(1,4.,80.5,251.75);
733 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
734 //
735 thick=1.;
d899e254 736 shift = thick/TMath::Sin(openingAngle);
c1637e41 737 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
738 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
739 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
740 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
741 //
74518339 742 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
743 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
744 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
745 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
746 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
747 //
748 shv->AddNode(elv,1);
749 //
750 //
d899e254 751 ys = shift*TMath::Sin(openingAngle);
752 xs = shift*TMath::Cos(openingAngle);
c1637e41 753 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
754 // cover
755 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
756 co->DefineSection(0,-0.5,77.,255.25);
757 co->DefineSection(1,0.5,77.,255.25);
758 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
759 // hole in a cover
760 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
d899e254 761 shift=4./TMath::Sin(openingAngle);
c1637e41 762 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
763 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
764 //
765 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
766 //
d899e254 767 ys = shift*TMath::Sin(openingAngle);
768 xs = shift*TMath::Cos(openingAngle);
c1637e41 769 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
770 //
771 // Sector as an Assembly
772 //
773 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
774 swhs->AddNode(swv,1);
775 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
776 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
777 //
778 // SSW as an Assembly of sectors
779 //
780 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
781 for(Int_t i =0;i<18;i++){
782 Double_t phi = (20.*i);
783 TGeoRotation *r = new TGeoRotation();
784 r->RotateZ(phi);
785 swheel->AddNode(swhs,i+1,r);
786 }
787 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
788 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
789
790 // sensitive strips - strip "0" is always set
791 // conditional
792 Int_t totrows;
793 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
794 Double_t *upar;
795 upar=NULL;
796 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
797 upar=new Double_t [10];
798 upar[0]=0.;
799 upar[1]=360.;
800 upar[2]=18.;
801 upar[3]=2.;
802 //
803 upar[4]=-124.8;
804 upar[7]=124.8;
805
806 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
807
808 upar[5]=rlow;
809 upar[6]=rlow+.01;
810 upar[8]=upar[5];
811 upar[9]=upar[6];
812 //
813 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
814 gGeoManager->Node("TPC_Strip",totrows+1,
815 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
816 //
817 // now, strips optionally
818 //
819 if(fSens){
820 //lower sectors
821 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
822 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
823 upar[5]=rlow;
824 upar[6]=rlow+.01;
825 upar[8]=upar[5];
826 upar[9]=upar[6];
827 gGeoManager->Node("TPC_Strip",i,
828 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
829 gGeoManager->Node("TPC_Strip",totrows+i,
830 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
831 }
832 //upper sectors
833 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
834 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
835 upar[5]=rlow;
836 upar[6]=rlow+.01;
837 upar[8]=upar[5];
838 upar[9]=upar[6];
839 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
840 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
841 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
842 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
843 }
844 }//strips
37831078 845 //----------------------------------------------------------
c1637e41 846 // TPc Support Rods - MAKROLON
37831078 847 //----------------------------------------------------------
c1637e41 848 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
849 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
78134e48 850 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
851 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");
852 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
c1637e41 853 // upper and lower rods differ in length!
854 delete [] upar;
855 upar=NULL;
856 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
857 upar=new Double_t [3];
858 upar[0]=1.8;
859 upar[1]=2.2;
1283eee5 860
c1637e41 861 //
862 //HV rods - makrolon + 0.58cm (diameter) Cu
ae4806ca 863 TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
c1637e41 864 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
865 //
866 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
867 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
868 hvrv->AddNode(hvcv,1);
78134e48 869 //
870 // resistor rods
871 //
872 TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner
873 TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer
874 TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
875 TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
876 //
877 TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
878 TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);
879 TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
880 TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);
881 //
882 // ceramic rod with water
883 //
884 criv->AddNode(cwiv,1);
885 crov->AddNode(cwov,1);
886 //
887 TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner
888 TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer
889 //
890 // peek rod
891 //
892 TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
893 TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12);
894 //
895 // resistor rods assembly
896 //
897 TGeoRotation rotr("rotr");
898 rotr.RotateZ(-21.);
899 //
900 TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
901 TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
902 //
903 TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
904 TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);
905 //
a3d2be59 906 TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
907 TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
908 rrin->AddNode(rriv,1);
909 rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
910 rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.));
911 rrin->AddNode(priv,1);
912 //
913 rrou->AddNode(rrov,1);
914 rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
915 rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.));
916 rrou->AddNode(prov,1);
78134e48 917 //
7281dc07 918 for(Int_t i=0;i<18;i++){
c1637e41 919 Double_t angle,x,y;
920 Double_t z,r;
921 angle=TMath::DegToRad()*20.*(Double_t)i;
922 r=81.5;
923 x=r * TMath::Cos(angle);
924 y=r * TMath::Sin(angle);
925 upar[2]=126.64; //lower
926 z= 126.96;
78134e48 927 //
928 if(i==3){
a3d2be59 929 v9->AddNode(rrin,1,new TGeoCombiTrans(x,y,z,&rotr)); //A
930 v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z,&rotr)); //C
78134e48 931 }
932 else {
933 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
934 gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
37831078 935 }
78134e48 936
937
938 //
c1637e41 939 r=254.25;
940 x=r * TMath::Cos(angle);
941 y=r * TMath::Sin(angle);
942 upar[2]=126.54; //upper
943 z=127.06;
78134e48 944 //
945 if(i==15){
946 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
947 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
948 }
949 else if(i==11){
a3d2be59 950 v9->AddNode(rrou,1,new TGeoCombiTrans(x,y,z,&rotr)); //A
951 v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z,&rotr)); //C
78134e48 952 }
953 else{
954 //
955 gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
956 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
957 }
37831078 958 }
1283eee5 959
69776907 960 delete [] upar;
961
bde68ab0 962 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
963 alice->AddNode(v1,1);
c1637e41 964
1283eee5 965} // end of function
fe4da5cc 966
967//_____________________________________________________________________________
ac81c411 968void AliTPCv2::AddAlignableVolumes() const
969{
970 //
971 // Create entries for alignable volumes associating the symbolic volume
972 // name with the corresponding volume path. Needs to be syncronized with
973 // eventual changes in the geometry.
974 //
975 SetInnerChambersAlignable();
976 SetOuterChambersAlignable();
977}
978
979//_____________________________________________________________________________
980void AliTPCv2::SetInnerChambersAlignable() const
981{
982 //
cdf69b9a 983 AliGeomManager::ELayerID idTPC1 = AliGeomManager::kTPC1;
984 Int_t modUID, modnum = 0;
d899e254 985 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
986 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
987 TString vpappend = "/TPC_IROC_1";
988 TString snstr1="TPC/EndcapA/Sector";
989 TString snstr2="TPC/EndcapC/Sector";
990 TString snappend="/InnerChamber";
ac81c411 991 TString volpath, symname;
992
1ac29fc4 993 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 994 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
1ac29fc4 995 volpath = vpstr1;
996 volpath += cnt;
997 volpath += vpappend;
998 symname = snstr1;
999 symname += cnt;
1000 symname += snappend;
cdf69b9a 1001 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 1002 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 1003 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1004 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 1005 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
1006 alignableEntry->SetMatrix(matTtoL);
1ac29fc4 1007 }
65293f49 1008
ac81c411 1009 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 1010 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
d899e254 1011 volpath = vpstr2;
ac81c411 1012 volpath += cnt;
d899e254 1013 volpath += vpappend;
1014 symname = snstr2;
ac81c411 1015 symname += cnt;
d899e254 1016 symname += snappend;
cdf69b9a 1017 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 1018 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 1019 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1020 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 1021 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
1022 alignableEntry->SetMatrix(matTtoL);
ac81c411 1023 }
1024}
1025
ac81c411 1026//_____________________________________________________________________________
1027void AliTPCv2::SetOuterChambersAlignable() const
1028{
1029 //
cdf69b9a 1030 AliGeomManager::ELayerID idTPC2 = AliGeomManager::kTPC2;
1031 Int_t modUID, modnum = 0;
d899e254 1032 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1033 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1034 TString vpappend = "/TPC_OROC_1";
1035 TString snstr1="TPC/EndcapA/Sector";
1036 TString snstr2="TPC/EndcapC/Sector";
1037 TString snappend="/OuterChamber";
ac81c411 1038 TString volpath, symname;
1039
1040 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 1041 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
d899e254 1042 volpath = vpstr1;
ac81c411 1043 volpath += cnt;
d899e254 1044 volpath += vpappend;
1045 symname = snstr1;
ac81c411 1046 symname += cnt;
d899e254 1047 symname += snappend;
cdf69b9a 1048 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 1049 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 1050 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1051 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 1052 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
1053 alignableEntry->SetMatrix(matTtoL);
ac81c411 1054 }
84cbbd90 1055
ac81c411 1056 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 1057 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
d899e254 1058 volpath = vpstr2;
ac81c411 1059 volpath += cnt;
d899e254 1060 volpath += vpappend;
1061 symname = snstr2;
ac81c411 1062 symname += cnt;
d899e254 1063 symname += snappend;
cdf69b9a 1064 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 1065 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 1066 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1067 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 1068 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
1069 alignableEntry->SetMatrix(matTtoL);
ac81c411 1070 }
1071}
1072
1073//_____________________________________________________________________________
d899e254 1074void AliTPCv2::DrawDetector() const
fe4da5cc 1075{
1076 //
1077 // Draw a shaded view of the Time Projection Chamber version 1
1078 //
1079
fe4da5cc 1080 // Set everything unseen
cfce8870 1081 gMC->Gsatt("*", "seen", -1);
fe4da5cc 1082 //
1083 // Set ALIC mother transparent
cfce8870 1084 gMC->Gsatt("ALIC","SEEN",0);
fe4da5cc 1085 //
1086 // Set the volumes visible
37831078 1087 //
1088
1089 gMC->Gsatt("TPC ","SEEN",0);
1090 gMC->Gsatt("TOIN","SEEN",1);
1091 gMC->Gsatt("TOIN","COLO",7);
37831078 1092 gMC->Gsatt("TOCV","SEEN",1);
1093 gMC->Gsatt("TOCV","COLO",4);
1094 gMC->Gsatt("TSA1","SEEN",0);
1095 gMC->Gsatt("TSA2","SEEN",0);
1096 gMC->Gsatt("TSA3","SEEN",0);
79575d04 1097 gMC->Gsatt("TSA4","SEEN",0);
1098 gMC->Gsatt("TSA5","SEEN",0);
37831078 1099 gMC->Gsatt("TOFC","SEEN",1);
1100 gMC->Gsatt("TOFC","COLO",4);
37831078 1101 gMC->Gsatt("TSA6","SEEN",0);
1102 gMC->Gsatt("TSA7","SEEN",0);
79575d04 1103 gMC->Gsatt("TSA8","SEEN",0);
37831078 1104 gMC->Gsatt("TIIN","SEEN",1);
79575d04 1105 gMC->Gsatt("TIIN","COLO",7);
1106 gMC->Gsatt("TII1","SEEN",0);
1107 gMC->Gsatt("TIFC","SEEN",1);
1108 gMC->Gsatt("TIFC","COLO",4);
1109 gMC->Gsatt("TSA9","SEEN",0);
37831078 1110 gMC->Gsatt("TS10","SEEN",0);
1111 gMC->Gsatt("TS11","SEEN",0);
1112 gMC->Gsatt("TS12","SEEN",0);
37831078 1113 gMC->Gsatt("TS13","SEEN",0);
1114 gMC->Gsatt("TS14","SEEN",0);
79575d04 1115 gMC->Gsatt("TICC","SEEN",0);
1116 gMC->Gsatt("TICM","SEEN",0);
37831078 1117 gMC->Gsatt("TS15","SEEN",0);
1118 gMC->Gsatt("TS16","SEEN",0);
37831078 1119 gMC->Gsatt("TS17","SEEN",0);
79575d04 1120 gMC->Gsatt("TS18","SEEN",0);
1121 gMC->Gsatt("TS19","SEEN",0);
1122 gMC->Gsatt("TPJ1","SEEN",0);
1123 gMC->Gsatt("TPJ2","SEEN",0);
1124 gMC->Gsatt("TICS","SEEN",0);
1125 gMC->Gsatt("TDGN","SEEN",0);
37831078 1126 gMC->Gsatt("TIRC","SEEN",0);
1127 gMC->Gsatt("TIC1","SEEN",1);
1128 gMC->Gsatt("TIPP","SEEN",0);
1129 gMC->Gsatt("TIC3","SEEN",0);
1130 gMC->Gsatt("TRCE","SEEN",0);
1131 gMC->Gsatt("TPSC","SEEN",0);
79575d04 1132 gMC->Gsatt("TPCC","SEEN",0);
37831078 1133 gMC->Gsatt("TORC","SEEN",0);
1134 gMC->Gsatt("TOPP","SEEN",0);
1135 gMC->Gsatt("TOC3","SEEN",0);
1136 gMC->Gsatt("TOC1","SEEN",1);
1137 gMC->Gsatt("TSSW","SEEN",1);
1138 gMC->Gsatt("TSWC","SEEN",1);
37831078 1139 gMC->Gsatt("TSSW","COLO",3);
1140 gMC->Gsatt("TSWC","COLO",3);
1141 gMC->Gsatt("TSCE","COLO",6);
79575d04 1142 gMC->Gsatt("TSCE","SEEN",1);
37831078 1143 gMC->Gsatt("TWES","SEEN",0);
1144 gMC->Gsatt("TSWB","SEEN",0);
1145 gMC->Gsatt("TPEL","SEEN",0);
1146 gMC->Gsatt("TPMW","SEEN",1);
37831078 1147 gMC->Gsatt("TESR","SEEN",1);
1148 gMC->Gsatt("TPMW","COLO",12);
37831078 1149 gMC->Gsatt("TIC1","COLO",5);
79575d04 1150 gMC->Gsatt("TOC1","COLO",5);
37831078 1151 gMC->Gsatt("TESB","SEEN",0);
37831078 1152 gMC->Gsatt("THVM","SEEN",1);
1153 gMC->Gsatt("THVM","COLO",11);
79575d04 1154 gMC->Gsatt("THVH","SEEN",0);
1155 gMC->Gsatt("TPSR","SEEN",0);
37831078 1156 gMC->Gsatt("THVL","SEEN",0);
79575d04 1157 gMC->Gsatt("THVC","SEEN",0);
37831078 1158 gMC->Gsatt("THVE","SEEN",0);
1159 gMC->Gsatt("THVR","SEEN",0);
79575d04 1160 gMC->Gsatt("TPSS","SEEN",0);
1161 gMC->Gsatt("TPUS","SEEN",0);
1162 gMC->Gsatt("TPLS","SEEN",0);
37831078 1163
fe4da5cc 1164 //
cfce8870 1165 gMC->Gdopt("hide", "on");
1166 gMC->Gdopt("shad", "on");
1167 gMC->Gsatt("*", "fill", 7);
1168 gMC->SetClipBox(".");
37831078 1169 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1170 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1171 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1172 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1173 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
cfce8870 1174 gMC->DefaultRange();
1175 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1176 gMC->Gdhead(1111, "Time Projection Chamber");
1177 gMC->Gdman(18, 4, "MAN");
1178 gMC->Gdopt("hide","off");
fe4da5cc 1179}
1180
1181//_____________________________________________________________________________
1182void AliTPCv2::CreateMaterials()
1183{
1184 //
1185 // Define materials for version 2 of the Time Projection Chamber
1186 //
37831078 1187
fe4da5cc 1188 AliTPC::CreateMaterials();
1189}
1190
1191//_____________________________________________________________________________
1192void AliTPCv2::Init()
1193{
1194 //
1195 // Initialises version 2 of the TPC after that it has been built
1196 //
37831078 1197
1198 Int_t *idtmed = fIdtmed->GetArray();
1199
fe4da5cc 1200 AliTPC::Init();
d4c354b9 1201
c1637e41 1202
1203 fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected...
d4c354b9 1204
c1637e41 1205 fIDrift=gMC->VolId("TPC_Drift");
1206 fSecOld=-100; // fake number
fe4da5cc 1207
d9888f70 1208 gMC->SetMaxNStep(-30000); // max. number of steps increased
fe4da5cc 1209
4481461d 1210 if (fPrimaryIonisation) {
1211 gMC->Gstpar(idtmed[2],"PRIMIO_E", 20.77); // 1st ionisation potential
1212
1213 gMC->Gstpar(idtmed[2],"PRIMIO_N", 14.35);
1214 gMC->Gstpar(idtmed[2],"LOSS", 14); // specific energy loss
8143dfb2 1215 gMC->Gstpar(idtmed[2],"STRA",4);
4481461d 1216 } else {
1217 gMC->Gstpar(idtmed[2],"LOSS", 5); // specific energy loss
1218 }
1219
fe4da5cc 1220
f77f13c8 1221 AliInfo("*** TPC version 2 initialized ***");
1222 AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
fe4da5cc 1223
1224 //
1225
1226}
1227
1228//_____________________________________________________________________________
1229void AliTPCv2::StepManager()
1230{
1231 //
1232 // Called for every step in the Time Projection Chamber
1233 //
1234
1235 //
1236 // parameters used for the energy loss calculations
1237 //
73042f01 1238 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1239 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1240 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
fe4da5cc 1241
1242
73042f01 1243 const Float_t kbig = 1.e10;
fe4da5cc 1244
1245 Int_t id,copy;
e61fd20d 1246 Float_t hits[5];
fe4da5cc 1247 Int_t vol[2];
37831078 1248 TLorentzVector p;
fe4da5cc 1249
37831078 1250 vol[1]=0; // preset row number to 0
fe4da5cc 1251 //
b97617a6 1252 if (fPrimaryIonisation) gMC->SetMaxStep(kbig);
fe4da5cc 1253
0a6d8768 1254 if(!gMC->IsTrackAlive()) return; // particle has disappeared
fe4da5cc 1255
cfce8870 1256 Float_t charge = gMC->TrackCharge();
fe4da5cc 1257
1258 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1259
37831078 1260 // check the sensitive volume
1261
c1637e41 1262 id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1263 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
da33556f 1264
c1637e41 1265 gMC->TrackPosition(p);
1266 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1267 //
1268
1269 //
1270 Double_t angle = TMath::ACos(p[0]/r);
1271 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1272 //
1273 // angular segment, it is not a real sector number...
1274 //
1275 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1276 fTPCParam->GetInnerAngle());
1277 // rotate to segment "0"
1278 Float_t cos,sin;
1279 fTPCParam->AdjustCosSin(sector,cos,sin);
1280 Float_t x1=p[0]*cos + p[1]*sin;
1281 // check if within sector's limits
1282 if(x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp()
1283 ||x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp()){
1284 // calculate real sector number...
1285 if (x1>fTPCParam->GetOuterRadiusLow()){
1286 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1287 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1288 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
37831078 1289 }
c1637e41 1290 else
1291 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1292 //
1293 // here I have a sector number
1294 //
37831078 1295
c1637e41 1296 vol[0]=sector;
1297 // check if change of sector
1298 if(sector != fSecOld){
1299 fSecOld=sector;
1300 // add track reference
e6add757 1301 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
c1637e41 1302 }
1303 // track is in the sensitive strip
1304 if(id == fIdSens){
1305 // track is entering the strip
1306 if (gMC->IsTrackEntering()){
1307 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1308 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1309 // row numbers are autonomous for lower and upper sectors
1310 if(vol[0] > fTPCParam->GetNInnerSector()) {
1311 vol[1] -= fTPCParam->GetNRowLow();
1312 }
1313 //
1314 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
37831078 1315
c1637e41 1316 // lower sector, row 0, because Jouri wants to have this
6a905708 1317
c1637e41 1318 gMC->TrackMomentum(p);
1319 hits[0]=p[0];
1320 hits[1]=p[1];
1321 hits[2]=p[2];
1322 hits[3]=0.; // this hit has no energy loss
1323 // Get also the track time for pileup simulation
1324 hits[4]=gMC->TrackTime();
e61fd20d 1325
c1637e41 1326 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1327 }
1328 //
e61fd20d 1329
c1637e41 1330 gMC->TrackPosition(p);
1331 hits[0]=p[0];
1332 hits[1]=p[1];
1333 hits[2]=p[2];
1334 hits[3]=0.; // this hit has no energy loss
1335 // Get also the track time for pileup simulation
1336 hits[4]=gMC->TrackTime();
930ee558 1337
c1637e41 1338 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
37831078 1339
c1637e41 1340 }
1341 else return;
1342 }
37831078 1343 //-----------------------------------------------------------------
c1637e41 1344 // charged particle is in the sensitive drift volume
37831078 1345 //-----------------------------------------------------------------
cfce8870 1346 if(gMC->TrackStep() > 0) {
b97617a6 1347 Int_t nel=0;
1348 if (!fPrimaryIonisation) {
1349 nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1350 }
1351 else {
1352 Float_t edep = gMC->Edep();
1353 if (edep > 0.) nel = (Int_t)((gMC->Edep()*1.5)/kwIon) + 1;
1354 }
fe4da5cc 1355 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
c1637e41 1356 //
37831078 1357 gMC->TrackPosition(p);
1358 hits[0]=p[0];
1359 hits[1]=p[1];
1360 hits[2]=p[2];
fe4da5cc 1361 hits[3]=(Float_t)nel;
c1637e41 1362
fe4da5cc 1363 // Add this hit
c1637e41 1364
6a905708 1365 if (fHitType&&2){
1366 gMC->TrackMomentum(p);
1367 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1368 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
1369 fTrackHits->SetHitPrecision(precision);
1370 }
e61fd20d 1371
1372 // Get also the track time for pileup simulation
1373 hits[4]=gMC->TrackTime();
c1637e41 1374
1375 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
e61fd20d 1376
c1637e41 1377 } // step>0
1378 } //within sector's limits
fe4da5cc 1379 // Stemax calculation for the next step
1380
1381 Float_t pp;
0a6d8768 1382 TLorentzVector mom;
b97617a6 1383 // below is valid only for Geant3 (fPromaryIonisation not set)
1384 if(!fPrimaryIonisation){
1385 gMC->TrackMomentum(mom);
1386 Float_t ptot=mom.Rho();
1387 Float_t betaGamma = ptot/gMC->TrackMass();
595bf2c3 1388
b97617a6 1389 Int_t pid=gMC->TrackPid();
1390 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1391 {
1392 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1393 }
1394 else
1395 {
1396
1397 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
1398 pp=kprim*BetheBloch(betaGamma);
595bf2c3 1399
fe4da5cc 1400 }
1401
b97617a6 1402 Double_t rnd = gMC->GetRandom()->Rndm();
fe4da5cc 1403
b97617a6 1404 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1405 }
c1637e41 1406
fe4da5cc 1407}
1408
1409//_____________________________________________________________________________
1410Float_t AliTPCv2::BetheBloch(Float_t bg)
1411{
1412 //
1413 // Bethe-Bloch energy loss formula
1414 //
73042f01 1415 const Double_t kp1=0.76176e-1;
1416 const Double_t kp2=10.632;
1417 const Double_t kp3=0.13279e-4;
1418 const Double_t kp4=1.8631;
1419 const Double_t kp5=1.9479;
fe4da5cc 1420
1421 Double_t dbg = (Double_t) bg;
1422
1423 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1424
73042f01 1425 Double_t aa = TMath::Power(beta,kp4);
1426 Double_t bb = TMath::Power(1./dbg,kp5);
fe4da5cc 1427
73042f01 1428 bb=TMath::Log(kp3+bb);
fe4da5cc 1429
73042f01 1430 return ((Float_t)((kp2-aa-bb)*kp1/aa));
fe4da5cc 1431}
73042f01 1432
1433