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4c039060 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
88cb7938 16/* $Id$ */
4c039060 17
73042f01 18//
4b0fdcad 19///////////////////////////////////////////////////////////////////////////////
20// //
21// Time Projection Chamber version 3 -- detailed TPC and slow simulation //
37831078 22//
4b0fdcad 23//Begin_Html
24/*
25<img src="picts/AliTPCv3Class.gif">
26*/
27//End_Html
28// //
29// //
30///////////////////////////////////////////////////////////////////////////////
31
32#include <stdlib.h>
116cbefd 33
116cbefd 34#include <TInterpreter.h>
88cb7938 35#include <TLorentzVector.h>
4b0fdcad 36#include <TMath.h>
88cb7938 37#include <TVirtualMC.h>
38#include <TPDGCode.h>
d9e80aca 39#include <TString.h>
40#include <TSystem.h>
116cbefd 41
4b0fdcad 42#include "AliConst.h"
116cbefd 43#include "AliRun.h"
cc80f89e 44#include "AliTPCDigitsArray.h"
4c475d27 45#include "AliTPCParam.h"
46#include "AliTPCParamSR.h"
4ed5dced 47#include "AliTPCTrackHitsV2.h"
116cbefd 48#include "AliTPCv3.h"
5d12ce38 49#include "AliMC.h"
c1637e41 50#include "TGeoManager.h"
51#include "TGeoVolume.h"
52#include "TGeoPcon.h"
53#include "TGeoTube.h"
54#include "TGeoPgon.h"
55#include "TGeoTrd1.h"
56#include "TGeoCompositeShape.h"
57#include "TGeoPara.h"
4b0fdcad 58
59ClassImp(AliTPCv3)
79575d04 60//_____________________________________________________________________________
61
62 AliTPCv3::AliTPCv3(){
63
64 fHitType = 1;
65
66}
67
4b0fdcad 68//_____________________________________________________________________________
69AliTPCv3::AliTPCv3(const char *name, const char *title) :
70 AliTPC(name, title)
71{
72 //
cc80f89e 73 // Standard constructor for Time Projection Chamber version 3
4b0fdcad 74 //
75
76 SetBufferSize(128000);
37831078 77 fIdSens=0;
73042f01 78
73042f01 79
80 if (fTPCParam)
81 fTPCParam->Write(fTPCParam->GetTitle());
79575d04 82
83 fHitType =1;
4b0fdcad 84}
85
86//_____________________________________________________________________________
87void AliTPCv3::CreateGeometry()
88{
89 //
cc80f89e 90 // Creation of the TPC coarse geometry (version 3)
37831078 91 // The whole drift volume is sensitive
cc80f89e 92 // Origin Marek Kowalski Cracow
4b0fdcad 93 //
94 //Begin_Html
95 /*
37831078 96 <img src="picts/AliTPCgif">
4b0fdcad 97 */
98 //End_Html
99 //Begin_Html
100 /*
37831078 101 <img src="picts/AliTPCv3Tree.gif">
4b0fdcad 102 */
103 //End_Html
c1637e41 104 //----------------------------------------------------------
105 // This geometry is written using TGeo class
106 // Firstly the shapes are defined, and only then the volumes
107 // What is recognized by the MC are volumes
108 //----------------------------------------------------------
37831078 109 //
c1637e41 110 // tpc - this will be the mother volume
37831078 111 //
1283eee5 112
37831078 113 //
c1637e41 114 // here I define a volume TPC
115 // retrive the medium name with "TPC_" as a leading string
4b0fdcad 116 //
c1637e41 117 TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
118 tpc->DefineSection(0,-290.,77.,278.);
456cb019 119 tpc->DefineSection(1,-259.6,70.,278.);
4b0fdcad 120 //
c1637e41 121 tpc->DefineSection(2,-259.6,68.1,278.);
122 tpc->DefineSection(3,-253.6,68.1,278.);
4b0fdcad 123 //
c1637e41 124 tpc->DefineSection(4,-253.6,68.,278.);
125 tpc->DefineSection(5,-74.0,60.8,278.);
4b0fdcad 126 //
c1637e41 127 tpc->DefineSection(6,-74.0,60.1,278.);
128 tpc->DefineSection(7,-73.3,60.1,278.);
4b0fdcad 129 //
c1637e41 130 tpc->DefineSection(8,-73.3,56.9,278.);
131 tpc->DefineSection(9,73.3,56.9,278.);
37831078 132 //
c1637e41 133 tpc->DefineSection(10,73.3,60.1,278.);
134 tpc->DefineSection(11,74.0,60.1,278.);
37831078 135 //
c1637e41 136 tpc->DefineSection(12,74.0,60.8,278.);
137 tpc->DefineSection(13,253.6,65.5,278.);
79575d04 138 //
c1637e41 139 tpc->DefineSection(14,253.6,65.6,278.);
140 tpc->DefineSection(15,259.6,65.6,278.);
141 //
456cb019 142 tpc->DefineSection(16,259.6,70.0,278.);
c1637e41 143 tpc->DefineSection(17,290.,77.,278.);
144 //
145 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
146 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
147 //
148 // drift volume - sensitive volume, extended beyond the
149 // endcaps, because of the alignment
150 //
151 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
152 dvol->DefineSection(0,-260.,74.5,264.4);
153 dvol->DefineSection(1,-253.6,74.5,264.4);
154 //
155 dvol->DefineSection(2,-253.6,76.6774,258.);
156 dvol->DefineSection(3,253.6,76.6774,258.);
157 //
158 dvol->DefineSection(4,253.6,74.5,264.4);
159 dvol->DefineSection(5,260.,74.5,264.4);
160 //
161 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
162 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
163 //
164 v1->AddNode(v9,1);
165 //
166 // outer insulator
167 //
168 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
169 //
170 tpco->DefineSection(0,-256.6,264.8,278.);
171 tpco->DefineSection(1,-253.6,264.8,278.);
172 //
173 tpco->DefineSection(2,-253.6,258.,278.);
174 tpco->DefineSection(3,250.6,258.,278.);
175 //
176 tpco->DefineSection(4,250.6,258.,275.5);
177 tpco->DefineSection(5,253.6,258.,275.5);
178 //
179 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
180 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
181 //
182 // outer containment vessel
183 //
184 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
185 //
186 tocv->DefineSection(0,-256.6,264.8,278.);
187 tocv->DefineSection(1,-253.6,264.8,278.);
188 //
189 tocv->DefineSection(2,-253.6,274.8124,278.);
190 tocv->DefineSection(3,247.6,274.8124,278.);
191 //
192 tocv->DefineSection(4,247.6,270.4,278.);
193 tocv->DefineSection(5,250.6,270.4,278.);
194 //
195 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
196 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
197 //
198 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
199 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
200 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
201 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
202 //
203 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
204 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
205 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
206 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
207 //
208 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
209 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
210 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
211 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
37831078 212
c1637e41 213 //-------------------------------------------------------
214 // Tpc Outer Field Cage
215 // daughters - composite (sandwich)
216 //-------------------------------------------------------
37831078 217
c1637e41 218 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
219 //
220 tofc->DefineSection(0,-253.6,258.,269.6);
221 tofc->DefineSection(1,-250.6,258.,269.6);
222 //
223 tofc->DefineSection(2,-250.6,258.,260.0676);
224 tofc->DefineSection(3,250.6,258.,260.0676);
225 //
226 tofc->DefineSection(4,250.6,258.,275.5);
227 tofc->DefineSection(5,253.6,258.,275.5);
228 //
229 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
230 //sandwich
231 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
232 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
233 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
234 //
235 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
236 //
237 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
238 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
239 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
240 //
241 // outer part - positioning
242 //
243 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
244 //
245 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
246 //
456cb019 247 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
c1637e41 248 //
249 v2->AddNode(v3,1); v2->AddNode(v4,1);
250 //
251 v1->AddNode(v2,1);
252 //-----------------------------------------------------------
37831078 253
37831078 254
37831078 255
37831078 256
37831078 257
37831078 258
c1637e41 259 //--------------------------------------------------------------------
260 // Tpc Inner INsulator (CO2)
261 // the cones, the central drum and the inner f.c. sandwich with a piece
262 // of the flane will be placed in the TPC
263 //--------------------------------------------------------------------
264 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
265 //
266 tpci->DefineSection(0,-253.6,68.4,76.6774);
267 tpci->DefineSection(1,-74.0,61.2,76.6774);
268 //
269 tpci->DefineSection(2,74.0,61.2,76.6774);
270 //
271 tpci->DefineSection(3,253.6,65.9,76.6774);
272 //
273 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
274 //
275 // now the inner field cage - only part of flanges (2 copies)
276 //
277 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
278 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
279 //
280 //---------------------------------------------------------
281 // Tpc Inner Containment vessel - Muon side
282 //---------------------------------------------------------
283 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
284 //
285 tcms->DefineSection(0,-259.1,68.1,74.2);
286 tcms->DefineSection(1,-253.6,68.1,74.2);
287 //
288 tcms->DefineSection(2,-253.6,68.1,68.4);
289 tcms->DefineSection(3,-74.0,60.9,61.2);
290 //
291 tcms->DefineSection(4,-74.0,60.1,61.2);
292 tcms->DefineSection(5,-73.3,60.1,61.2);
293 //
294 tcms->DefineSection(6,-73.3,56.9,61.2);
295 tcms->DefineSection(7,-73.0,56.9,61.2);
296 //
297 tcms->DefineSection(8,-73.0,56.9,58.8);
298 tcms->DefineSection(9,-71.3,56.9,58.8);
299 //
300 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
37831078 301 //-----------------------------------------------
c1637e41 302 // inner containment vessel - shaft side
37831078 303 //-----------------------------------------------
c1637e41 304 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
305 //
306 tcss->DefineSection(0,71.3,56.9,58.8);
307 tcss->DefineSection(1,73.0,56.9,58.8);
308 //
309 tcss->DefineSection(2,73.0,56.9,61.2);
310 tcss->DefineSection(3,73.3,56.9,61.2);
311 //
312 tcss->DefineSection(4,73.3,60.1,61.2);
313 tcss->DefineSection(5,74.0,60.1,61.2);
314 //
315 tcss->DefineSection(6,74.0,60.9,61.2);
316 tcss->DefineSection(7,253.6,65.6,65.9);
317 //
318 tcss->DefineSection(8,253.6,65.6,74.2);
319 tcss->DefineSection(9,258.1,65.6,74.2);
320 //
321 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
322 //-----------------------------------------------
323 // Inner field cage
324 // define 4 parts and make an assembly
325 //-----------------------------------------------
326 // part1 - Al - 2 copies
327 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
328 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
329 // sandwich - outermost parts - 2 copies
330 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
331 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
332 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
333 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
334 //
335 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
336 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
337 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
338 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
339 //
340 // middle parts - 2 copies
341 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
342 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
343 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
344 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
345 //
346 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
347 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
348 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
349 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
350 // central part - 1 copy
351 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
352 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
353 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
354 //
355 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
356 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
357 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
358 //
359 // inner part - positioning
360 //
361 // creating a sandwich
362 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
363 //
364 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
365 //
366 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
367 //
368 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
369 //
370 tv100->AddNode(tv10,1);
371 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
372 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
373 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
374 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
375 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
376 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
377 //
378 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
379 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
380 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
381 v9->AddNode(tv100,1);
382 //
383 // central drum
384 //
385 // flange + sandwich
386 //
387 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
388 cfl->DefineSection(0,-71.1,59.7,61.2);
389 cfl->DefineSection(1,-68.6,59.7,61.2);
390 //
391 cfl->DefineSection(2,-68.6,60.6324,61.2);
392 cfl->DefineSection(3,68.6,60.6324,61.2);
393 //
394 cfl->DefineSection(4,68.6,59.7,61.2);
395 cfl->DefineSection(5,71.1,59.7,61.2);
396 //
397 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
398 // sandwich
399 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
400 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
401 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
402 //
403 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
404 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
405 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
406 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
407 //
408 // seals for central drum 2 copies
409 //
410 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
411 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
412 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
413 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.));
414 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.));
415 //
416 // seal collars
417 TGeoPcon *se = new TGeoPcon(0.,360.,6);
418 se->DefineSection(0,-72.8,59.7,61.2);
419 se->DefineSection(1,-72.3,59.7,61.2);
420 //
421 se->DefineSection(2,-72.3,58.85,61.2);
422 se->DefineSection(3,-71.6,58.85,61.2);
423 //
424 se->DefineSection(4,-71.6,59.7,61.2);
425 se->DefineSection(5,-71.3,59.7,61.2);
426 //
427 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
428 //
429 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
430 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
431 //
432 // define reflection matrix
433 //
434 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,270.,180.,0.);
435 //
436 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
437 //
ae4806ca 438 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-70.1));
439 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,70.1));
c1637e41 440 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
441 //
442 // central membrane - 2 rings and a mylar membrane - assembly
443 //
444 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
445 TGeoTube *oh = new TGeoTube(250.,256.,.5);
446 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
447 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
448 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
449 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
450 //
451 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
452 cm->AddNode(ihv,1);
453 cm->AddNode(ohv,1);
454 cm->AddNode(memv,1);
455 v9->AddNode(cm,1);
456 //
457 // end caps - they are make as an assembly of single segments
458 // containing both readout chambers
459 //
460 Double_t OpeningAngle = 10.*TMath::DegToRad();
461 Double_t thick=1.5; // rib
462 Double_t shift = thick/TMath::Sin(OpeningAngle);
463 //
464 Double_t LowEdge = 86.3; // hole in the wheel
465 Double_t UpEdge = 240.4; // hole in the wheel
466 //
467 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
468 //
469 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
470 //
471 hole->DefineSection(0,-3.5,LowEdge-shift,UpEdge-shift);
472 hole->DefineSection(1,-1.5,LowEdge-shift,UpEdge-shift);
473 //
474 hole->DefineSection(2,-1.5,LowEdge-shift,UpEdge+3.-shift);
475 hole->DefineSection(3,3.5,LowEdge-shift,UpEdge+3.-shift);
476 //
477 Double_t ys = shift*TMath::Sin(OpeningAngle);
478 Double_t xs = shift*TMath::Cos(OpeningAngle);
479 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
480 tr->RegisterYourself();
481 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
482 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
483 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
484 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
485 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
486 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
487 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
488 //
489 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
490 //
491 // readout chambers
492 //
493 // IROC first
494 //
495 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
496 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
497 // empty space
498 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
499 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
500 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
501 //bars
502 Double_t tga = (19.8328-12.3742)/39.3;
503 Double_t xmin,xmax;
504 xmin = 9.55*tga+12.3742;
505 xmax = 9.95*tga+12.3742;
506 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
507 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
508 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
509 xmin=19.4*tga+12.3742;
510 xmax=19.9*tga+12.3742;
511 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
512 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
513 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
514 xmin=29.35*tga+12.3742;
515 xmax=29.75*tga+12.3742;
516 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
517 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
518 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
519 //
520 // holes for connectors
521 //
522 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
523 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
d9e80aca 524 TString fileName(gSystem->Getenv("ALICE_ROOT"));
525 fileName += "/TPC/conn_iroc.dat";
c1637e41 526 ifstream in;
d9e80aca 527 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 528 for(Int_t i =0;i<86;i++){
456cb019 529 Double_t y = 3.99;
c1637e41 530 Double_t x,z,ang;
531 in>>x>>z>>ang;
456cb019 532 z-=26.5;
c1637e41 533 TGeoRotation *rrr = new TGeoRotation();
534 rrr->RotateY(ang);
535 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
536 ibdv->AddNode(connv,i+1,trans);
537 }
538 in.close();
539 // "cap"
540 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
541 // "hole"
542 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
543 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
544 tr1->RegisterYourself();
545 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
546 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
547 //
548 // pad plane and wire fixations
549 //
550 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
551 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
552 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
553 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
554 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
555 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
556 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
557 //
558 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
559 //
560 iroc->AddNode(ibdv,1);
561 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
562 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
563 tga =(23.3521-14.5974)/49.65;
564 Double_t xx = 24.825*tga+14.5974-0.6;
565 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
566 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
567 //
568 // OROC
569 //
570 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
571 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
572 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
573 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
574 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
575 //horizontal bars
576 tga=(38.5084-20.2938)/99.3;
577 xmin=tga*10.2+20.2938;
578 xmax=tga*10.6+20.2938;
579 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
580 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
581 //
582 xmin=22.55*tga+20.2938;
583 xmax=24.15*tga+20.2938;
584 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
585 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
586 //
587 xmin=36.1*tga+20.2938;
588 xmax=36.5*tga+20.2938;
589 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
590 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
591 //
592 xmin=49.0*tga+20.2938;
593 xmax=50.6*tga+20.2938;
594 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
595 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
596 //
597 xmin=63.6*tga+20.2938;
598 xmax=64.0*tga+20.2938;
599 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
600 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
601 //
602 xmin=75.5*tga+20.2938;
603 xmax=77.15*tga+20.2938;
604 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
605 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
606 //
607 xmin=88.7*tga+20.2938;
608 xmax=89.1*tga+20.2938;
609 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
610 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
611 //
612 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
613 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
614 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
615 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
616 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
617 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
618 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
619 // vertical bars
620 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
621 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
622 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
623 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
624 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
625 //
626 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
627 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
628 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
629 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
630 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
631 //
632 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
633 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
634 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
635 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
636 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
637 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
638 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
639 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
640 //
641 // holes for connectors
642 //
d9e80aca 643 fileName = gSystem->Getenv("ALICE_ROOT");
644 fileName += "/TPC/conn_oroc.dat";
645 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 646 for(Int_t i =0;i<78;i++){
647 Double_t y =3.89;
648 Double_t x,z,ang;
649 Double_t x1,z1,x2,z2;
650 in>>x>>z>>ang;
651 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
652 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
653 //
654 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
655 //
656 TGeoRotation *rr = new TGeoRotation();
657 rr->RotateY(ang);
658 z1-=54.95;
659 z2-=54.95;
660 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
661 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
662 obdv->AddNode(connv,i+1,trans1);
663 obdv->AddNode(connv,i+79,trans2);
664 }
665 in.close();
666 // cap
667 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
668 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
669 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
670 tr5->RegisterYourself();
671 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
672 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
673 //
674 // pad plane and wire fixations
675 //
676 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
677 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
678 //
679 tga=(43.5239-23.3874)/114.2;
680 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
681 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
682 xx = 57.1*tga+23.3874-0.7;
683 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
684 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
685 //
686 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
687 //
688 oroc->AddNode(obdv,1);
689 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
690 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
691 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
692 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
693 //
694 // now iroc and oroc are placed into a sector...
695 //
696 TGeoVolumeAssembly *sect = new TGeoVolumeAssembly("TPC_SECT");
697 TGeoRotation rot1("rot1",90.,90.,0.);
698 TGeoRotation rot2("rot2");
699 rot2.RotateY(10.);
700 TGeoRotation *rot = new TGeoRotation("rot");
701 *rot=rot1*rot2;
702 //
703 Double_t x0,y0;
704 x0=110.2*TMath::Cos(OpeningAngle);
705 y0=110.2*TMath::Sin(OpeningAngle);
706 TGeoCombiTrans *combi1 = new TGeoCombiTrans("combi1",x0,y0,1.09,rot);
707 x0=188.45*TMath::Cos(OpeningAngle);
708 y0=188.45*TMath::Sin(OpeningAngle);
709 TGeoCombiTrans *combi2 = new TGeoCombiTrans("combi2",x0,y0,0.99,rot);
710 //
711 sect->AddNode(ch,1);
712 sect->AddNode(iroc,1,combi1);
713 sect->AddNode(oroc,1,combi2);
714 //
715 // segment is ready...
716 // now I try to make a wheel...
717 //
718 TGeoVolumeAssembly *wheel = new TGeoVolumeAssembly("TPC_ENDCAP");
719 //
720 for(Int_t i =0;i<18;i++){
721 Double_t phi = (20.*i);
722 TGeoRotation *r = new TGeoRotation();
723 r->RotateZ(phi);
724 wheel->AddNode(sect,i+1,r);
725
726 }
727 // wheels in the drift volume!
728 v9->AddNode(wheel,1,new TGeoTranslation(0.,0.,-256.6));
729 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
730 v9->AddNode(wheel,2,combi3);
37831078 731
c1637e41 732 //_____________________________________________________________
733 // service support wheel
734 //_____________________________________________________________
735 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
736 sw->DefineSection(0,-4.,80.5,251.75);
737 sw->DefineSection(1,4.,80.5,251.75);
738 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
739 //
740 thick=1.;
741 shift = thick/TMath::Sin(OpeningAngle);
742 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
743 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
744 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
745 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
746 //
74518339 747 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
748 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
749 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
750 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
751 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
752 //
753 shv->AddNode(elv,1);
754 //
c1637e41 755 ys = shift*TMath::Sin(OpeningAngle);
756 xs = shift*TMath::Cos(OpeningAngle);
757 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
758 // cover
759 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
760 co->DefineSection(0,-0.5,77.,255.25);
761 co->DefineSection(1,0.5,77.,255.25);
762 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
763 // hole in a cover
764 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
765 shift=4./TMath::Sin(OpeningAngle);
766 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
767 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
768 //
769 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
770 //
771 ys = shift*TMath::Sin(OpeningAngle);
772 xs = shift*TMath::Cos(OpeningAngle);
773 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
774 //
775 // Sector as an Assembly
776 //
777 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
778 swhs->AddNode(swv,1);
779 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
780 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
781 //
782 // SSW as an Assembly of sectors
783 //
784 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
785 for(Int_t i =0;i<18;i++){
786 Double_t phi = (20.*i);
787 TGeoRotation *r = new TGeoRotation();
788 r->RotateZ(phi);
789 swheel->AddNode(swhs,i+1,r);
790 }
791 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
792 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
793 //
37831078 794 //----------------------------------------------------------
795 // TPc Support Rods - MAKROLON
796 //----------------------------------------------------------
c1637e41 797 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
798 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
799 // upper and lower rods differ in length!
800 Double_t *upar;
801 upar=NULL;
802 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
803 upar=new Double_t [3];
804 upar[0]=1.8;
805 upar[1]=2.2;
806
807 //
808 //HV rods - makrolon + 0.58cm (diameter) Cu
ae4806ca 809 TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
c1637e41 810 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
811 //
812 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
813 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
814 hvrv->AddNode(hvcv,1);
815 for(Int_t i=0;i<17;i++){
816 Double_t angle,x,y;
817 Double_t z,r;
818 angle=TMath::DegToRad()*20.*(Double_t)i;
819 r=81.5;
820 x=r * TMath::Cos(angle);
821 y=r * TMath::Sin(angle);
822 upar[2]=126.64; //lower
823 z= 126.96;
824 if(i==15){
825 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
826 v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
79575d04 827 }
c1637e41 828 else{
829 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
830 gGeoManager->Node("TPC_Rod",i+18,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
831 }
832 r=254.25;
833 x=r * TMath::Cos(angle);
834 y=r * TMath::Sin(angle);
835 upar[2]=126.54; //upper
836 z=127.06;
837 gGeoManager->Node("TPC_Rod",i+36,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
838 gGeoManager->Node("TPC_Rod",i+54,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
37831078 839 }
840
bde68ab0 841 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
842 alice->AddNode(v1,1);
843
37831078 844
845
846} // end of function
37831078 847
848//_____________________________________________________________________________
849void AliTPCv3::DrawDetector()
850{
851 //
79575d04 852 // Draw a shaded view of the Time Projection Chamber version 3
37831078 853 //
854
855
856 // Set everything unseen
857 gMC->Gsatt("*", "seen", -1);
858 //
859 // Set ALIC mother transparent
860 gMC->Gsatt("ALIC","SEEN",0);
861 //
862 // Set the volumes visible
863 //
864
865 gMC->Gsatt("TPC ","SEEN",0);
866 gMC->Gsatt("TOIN","SEEN",1);
867 gMC->Gsatt("TOIN","COLO",7);
37831078 868 gMC->Gsatt("TOCV","SEEN",1);
869 gMC->Gsatt("TOCV","COLO",4);
870 gMC->Gsatt("TSA1","SEEN",0);
871 gMC->Gsatt("TSA2","SEEN",0);
872 gMC->Gsatt("TSA3","SEEN",0);
79575d04 873 gMC->Gsatt("TSA4","SEEN",0);
874 gMC->Gsatt("TSA5","SEEN",0);
37831078 875 gMC->Gsatt("TOFC","SEEN",1);
876 gMC->Gsatt("TOFC","COLO",4);
37831078 877 gMC->Gsatt("TSA6","SEEN",0);
878 gMC->Gsatt("TSA7","SEEN",0);
79575d04 879 gMC->Gsatt("TSA8","SEEN",0);
37831078 880 gMC->Gsatt("TIIN","SEEN",1);
79575d04 881 gMC->Gsatt("TIIN","COLO",7);
882 gMC->Gsatt("TII1","SEEN",0);
883 gMC->Gsatt("TIFC","SEEN",1);
884 gMC->Gsatt("TIFC","COLO",4);
885 gMC->Gsatt("TSA9","SEEN",0);
37831078 886 gMC->Gsatt("TS10","SEEN",0);
887 gMC->Gsatt("TS11","SEEN",0);
888 gMC->Gsatt("TS12","SEEN",0);
37831078 889 gMC->Gsatt("TS13","SEEN",0);
890 gMC->Gsatt("TS14","SEEN",0);
79575d04 891 gMC->Gsatt("TICC","SEEN",0);
892 gMC->Gsatt("TICM","SEEN",0);
37831078 893 gMC->Gsatt("TS15","SEEN",0);
894 gMC->Gsatt("TS16","SEEN",0);
37831078 895 gMC->Gsatt("TS17","SEEN",0);
79575d04 896 gMC->Gsatt("TS18","SEEN",0);
897 gMC->Gsatt("TS19","SEEN",0);
898 gMC->Gsatt("TPJ1","SEEN",0);
899 gMC->Gsatt("TPJ2","SEEN",0);
900 gMC->Gsatt("TICS","SEEN",0);
901 gMC->Gsatt("TDGS","SEEN",0);
37831078 902 gMC->Gsatt("TIRC","SEEN",0);
903 gMC->Gsatt("TIC1","SEEN",1);
904 gMC->Gsatt("TIPP","SEEN",0);
905 gMC->Gsatt("TIC3","SEEN",0);
906 gMC->Gsatt("TRCE","SEEN",0);
907 gMC->Gsatt("TPSC","SEEN",0);
79575d04 908 gMC->Gsatt("TPCC","SEEN",0);
37831078 909 gMC->Gsatt("TORC","SEEN",0);
910 gMC->Gsatt("TOPP","SEEN",0);
911 gMC->Gsatt("TOC3","SEEN",0);
912 gMC->Gsatt("TOC1","SEEN",1);
913 gMC->Gsatt("TSSW","SEEN",1);
914 gMC->Gsatt("TSWC","SEEN",1);
37831078 915 gMC->Gsatt("TSSW","COLO",3);
916 gMC->Gsatt("TSWC","COLO",3);
917 gMC->Gsatt("TSCE","COLO",6);
79575d04 918 gMC->Gsatt("TSCE","SEEN",1);
37831078 919 gMC->Gsatt("TWES","SEEN",0);
920 gMC->Gsatt("TSWB","SEEN",0);
921 gMC->Gsatt("TPEL","SEEN",0);
922 gMC->Gsatt("TPMW","SEEN",1);
37831078 923 gMC->Gsatt("TESR","SEEN",1);
924 gMC->Gsatt("TPMW","COLO",12);
37831078 925 gMC->Gsatt("TIC1","COLO",5);
79575d04 926 gMC->Gsatt("TOC1","COLO",5);
37831078 927 gMC->Gsatt("TESB","SEEN",0);
37831078 928 gMC->Gsatt("THVM","SEEN",1);
929 gMC->Gsatt("THVM","COLO",11);
79575d04 930 gMC->Gsatt("THVH","SEEN",0);
931 gMC->Gsatt("TPSR","SEEN",0);
37831078 932 gMC->Gsatt("THVL","SEEN",0);
79575d04 933 gMC->Gsatt("THVC","SEEN",0);
37831078 934 gMC->Gsatt("THVE","SEEN",0);
935 gMC->Gsatt("THVR","SEEN",0);
936
937 //
938 gMC->Gdopt("hide", "on");
939 gMC->Gdopt("shad", "on");
940 gMC->Gsatt("*", "fill", 7);
941 gMC->SetClipBox(".");
942 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
943 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
944 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
945 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
946 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
947 gMC->DefaultRange();
948 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
949 gMC->Gdhead(1111, "Time Projection Chamber");
950 gMC->Gdman(18, 4, "MAN");
951 gMC->Gdopt("hide","off");
952}
953
954//_____________________________________________________________________________
955void AliTPCv3::CreateMaterials()
956{
957 //
958 // Define materials for version 2 of the Time Projection Chamber
959 //
960
961
962 //
963 AliTPC::CreateMaterials();
964}
965
966//_____________________________________________________________________________
967void AliTPCv3::Init()
968{
969 //
970 // Initialises version 3 of the TPC after that it has been built
971 //
972 Int_t *idtmed = fIdtmed->GetArray();
4b0fdcad 973
974 AliTPC::Init();
975
c1637e41 976 fIdSens=gMC->VolId("TPC_Drift"); // drift gas as a sensitive volume
4b0fdcad 977
978 gMC->SetMaxNStep(30000); // max. number of steps increased
979
37831078 980 gMC->Gstpar(idtmed[2],"LOSS",5);
4b0fdcad 981
13a8c8d7 982 printf("%s: *** TPC version 3 initialized***\n",ClassName());
983
984 printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
985
986 // printf("*** TPC version 3 initialized ***\n");
987 // printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
4b0fdcad 988
989 //
990
991}
992
993//_____________________________________________________________________________
994void AliTPCv3::StepManager()
995{
996 //
997 // Called for every step in the Time Projection Chamber
998 //
999
1000 //
1001 // parameters used for the energy loss calculations
1002 //
73042f01 1003 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1004 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1005 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
4b0fdcad 1006
1007
73042f01 1008 const Float_t kbig = 1.e10;
4b0fdcad 1009
1010 Int_t id,copy;
1011 TLorentzVector pos;
e61fd20d 1012 Float_t hits[5];
4b0fdcad 1013 Int_t vol[2];
4b0fdcad 1014
1015 vol[1]=0;
1016 vol[0]=0;
1017
1018 //
1019
73042f01 1020 gMC->SetMaxStep(kbig);
4b0fdcad 1021
1022 if(!gMC->IsTrackAlive()) return; // particle has disappeared
1023
1024 Float_t charge = gMC->TrackCharge();
1025
1026 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1027
1028
1029 id=gMC->CurrentVolID(copy);
c1637e41 1030
4b0fdcad 1031
37831078 1032 if (id != fIdSens) return;
4b0fdcad 1033
1034 //
1035 // charged particle is in the sensitive volume
1036 //
1037
1038 if(gMC->TrackStep() > 0) {
1039
1040
73042f01 1041 Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
4b0fdcad 1042 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1043
1044 gMC->TrackPosition(pos);
1045 hits[0]=pos[0];
1046 hits[1]=pos[1];
1047 hits[2]=pos[2];
1048
e61fd20d 1049 // Get also the track time for pileup simulation
1050 hits[4]=gMC->TrackTime();
1051
4b0fdcad 1052 //
1053 // check the selected side of the TPC
1054 //
1055
1056 if(fSide && fSide*hits[2]<=0.) return;
1057
1058 hits[3]=(Float_t)nel;
1059
1060 // Add this hit
1061
5d12ce38 1062 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); //MI change
4b0fdcad 1063
1064 }
1065
1066 // Stemax calculation for the next step
1067
1068 Float_t pp;
1069 TLorentzVector mom;
1070 gMC->TrackMomentum(mom);
1071 Float_t ptot=mom.Rho();
73042f01 1072 Float_t betaGamma = ptot/gMC->TrackMass();
4b0fdcad 1073
69e40cce 1074 Int_t pid=gMC->TrackPid();
cc80f89e 1075 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
4b0fdcad 1076 {
73042f01 1077 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
4b0fdcad 1078 }
1079 else
1080 {
7b562732 1081 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3);
73042f01 1082 pp=kprim*BetheBloch(betaGamma);
4b0fdcad 1083 if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1084 }
1085
b9d0a01d 1086 Double_t rnd = gMC->GetRandom()->Rndm();
4b0fdcad 1087
1088 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1089
1090}
1091
1092//_____________________________________________________________________________
1093Float_t AliTPCv3::BetheBloch(Float_t bg)
1094{
1095 //
1096 // Bethe-Bloch energy loss formula
1097 //
73042f01 1098 const Double_t kp1=0.76176e-1;
1099 const Double_t kp2=10.632;
1100 const Double_t kp3=0.13279e-4;
1101 const Double_t kp4=1.8631;
1102 const Double_t kp5=1.9479;
4b0fdcad 1103
1104 Double_t dbg = (Double_t) bg;
1105
1106 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1107
73042f01 1108 Double_t aa = TMath::Power(beta,kp4);
1109 Double_t bb = TMath::Power(1./dbg,kp5);
4b0fdcad 1110
73042f01 1111 bb=TMath::Log(kp3+bb);
4b0fdcad 1112
73042f01 1113 return ((Float_t)((kp2-aa-bb)*kp1/aa));
4b0fdcad 1114}