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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>
116cbefd 39
4b0fdcad 40#include "AliConst.h"
116cbefd 41#include "AliRun.h"
cc80f89e 42#include "AliTPCDigitsArray.h"
4c475d27 43#include "AliTPCParam.h"
44#include "AliTPCParamSR.h"
4ed5dced 45#include "AliTPCTrackHitsV2.h"
116cbefd 46#include "AliTPCv3.h"
5d12ce38 47#include "AliMC.h"
c1637e41 48#include "TGeoManager.h"
49#include "TGeoVolume.h"
50#include "TGeoPcon.h"
51#include "TGeoTube.h"
52#include "TGeoPgon.h"
53#include "TGeoTrd1.h"
54#include "TGeoCompositeShape.h"
55#include "TGeoPara.h"
4b0fdcad 56
57ClassImp(AliTPCv3)
79575d04 58//_____________________________________________________________________________
59
60 AliTPCv3::AliTPCv3(){
61
62 fHitType = 1;
63
64}
65
4b0fdcad 66//_____________________________________________________________________________
67AliTPCv3::AliTPCv3(const char *name, const char *title) :
68 AliTPC(name, title)
69{
70 //
cc80f89e 71 // Standard constructor for Time Projection Chamber version 3
4b0fdcad 72 //
73
74 SetBufferSize(128000);
37831078 75 fIdSens=0;
73042f01 76
73042f01 77
78 if (fTPCParam)
79 fTPCParam->Write(fTPCParam->GetTitle());
79575d04 80
81 fHitType =1;
4b0fdcad 82}
83
84//_____________________________________________________________________________
85void AliTPCv3::CreateGeometry()
86{
87 //
cc80f89e 88 // Creation of the TPC coarse geometry (version 3)
37831078 89 // The whole drift volume is sensitive
cc80f89e 90 // Origin Marek Kowalski Cracow
4b0fdcad 91 //
92 //Begin_Html
93 /*
37831078 94 <img src="picts/AliTPCgif">
4b0fdcad 95 */
96 //End_Html
97 //Begin_Html
98 /*
37831078 99 <img src="picts/AliTPCv3Tree.gif">
4b0fdcad 100 */
101 //End_Html
c1637e41 102 //----------------------------------------------------------
103 // This geometry is written using TGeo class
104 // Firstly the shapes are defined, and only then the volumes
105 // What is recognized by the MC are volumes
106 //----------------------------------------------------------
37831078 107 //
c1637e41 108 // tpc - this will be the mother volume
37831078 109 //
1283eee5 110
37831078 111 //
c1637e41 112 // here I define a volume TPC
113 // retrive the medium name with "TPC_" as a leading string
4b0fdcad 114 //
c1637e41 115 TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
116 tpc->DefineSection(0,-290.,77.,278.);
117 tpc->DefineSection(1,-259.6,77.,278.);
4b0fdcad 118 //
c1637e41 119 tpc->DefineSection(2,-259.6,68.1,278.);
120 tpc->DefineSection(3,-253.6,68.1,278.);
4b0fdcad 121 //
c1637e41 122 tpc->DefineSection(4,-253.6,68.,278.);
123 tpc->DefineSection(5,-74.0,60.8,278.);
4b0fdcad 124 //
c1637e41 125 tpc->DefineSection(6,-74.0,60.1,278.);
126 tpc->DefineSection(7,-73.3,60.1,278.);
4b0fdcad 127 //
c1637e41 128 tpc->DefineSection(8,-73.3,56.9,278.);
129 tpc->DefineSection(9,73.3,56.9,278.);
37831078 130 //
c1637e41 131 tpc->DefineSection(10,73.3,60.1,278.);
132 tpc->DefineSection(11,74.0,60.1,278.);
37831078 133 //
c1637e41 134 tpc->DefineSection(12,74.0,60.8,278.);
135 tpc->DefineSection(13,253.6,65.5,278.);
79575d04 136 //
c1637e41 137 tpc->DefineSection(14,253.6,65.6,278.);
138 tpc->DefineSection(15,259.6,65.6,278.);
139 //
140 tpc->DefineSection(16,259.6,77.0,278.);
141 tpc->DefineSection(17,290.,77.,278.);
142 //
143 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
144 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
145 //
146 // drift volume - sensitive volume, extended beyond the
147 // endcaps, because of the alignment
148 //
149 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
150 dvol->DefineSection(0,-260.,74.5,264.4);
151 dvol->DefineSection(1,-253.6,74.5,264.4);
152 //
153 dvol->DefineSection(2,-253.6,76.6774,258.);
154 dvol->DefineSection(3,253.6,76.6774,258.);
155 //
156 dvol->DefineSection(4,253.6,74.5,264.4);
157 dvol->DefineSection(5,260.,74.5,264.4);
158 //
159 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
160 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
161 //
162 v1->AddNode(v9,1);
163 //
164 // outer insulator
165 //
166 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
167 //
168 tpco->DefineSection(0,-256.6,264.8,278.);
169 tpco->DefineSection(1,-253.6,264.8,278.);
170 //
171 tpco->DefineSection(2,-253.6,258.,278.);
172 tpco->DefineSection(3,250.6,258.,278.);
173 //
174 tpco->DefineSection(4,250.6,258.,275.5);
175 tpco->DefineSection(5,253.6,258.,275.5);
176 //
177 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
178 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
179 //
180 // outer containment vessel
181 //
182 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
183 //
184 tocv->DefineSection(0,-256.6,264.8,278.);
185 tocv->DefineSection(1,-253.6,264.8,278.);
186 //
187 tocv->DefineSection(2,-253.6,274.8124,278.);
188 tocv->DefineSection(3,247.6,274.8124,278.);
189 //
190 tocv->DefineSection(4,247.6,270.4,278.);
191 tocv->DefineSection(5,250.6,270.4,278.);
192 //
193 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
194 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
195 //
196 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
197 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
198 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
199 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
200 //
201 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
202 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
203 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
204 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
205 //
206 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
207 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
208 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
209 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
37831078 210
c1637e41 211 //-------------------------------------------------------
212 // Tpc Outer Field Cage
213 // daughters - composite (sandwich)
214 //-------------------------------------------------------
37831078 215
c1637e41 216 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
217 //
218 tofc->DefineSection(0,-253.6,258.,269.6);
219 tofc->DefineSection(1,-250.6,258.,269.6);
220 //
221 tofc->DefineSection(2,-250.6,258.,260.0676);
222 tofc->DefineSection(3,250.6,258.,260.0676);
223 //
224 tofc->DefineSection(4,250.6,258.,275.5);
225 tofc->DefineSection(5,253.6,258.,275.5);
226 //
227 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
228 //sandwich
229 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
230 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
231 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
232 //
233 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
234 //
235 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
236 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
237 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
238 //
239 // outer part - positioning
240 //
241 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
242 //
243 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
244 //
245 v3->AddNode(tov1,1); v4->AddNode(tf1v,1);
246 //
247 v2->AddNode(v3,1); v2->AddNode(v4,1);
248 //
249 v1->AddNode(v2,1);
250 //-----------------------------------------------------------
37831078 251
37831078 252
37831078 253
37831078 254
37831078 255
37831078 256
c1637e41 257 //--------------------------------------------------------------------
258 // Tpc Inner INsulator (CO2)
259 // the cones, the central drum and the inner f.c. sandwich with a piece
260 // of the flane will be placed in the TPC
261 //--------------------------------------------------------------------
262 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
263 //
264 tpci->DefineSection(0,-253.6,68.4,76.6774);
265 tpci->DefineSection(1,-74.0,61.2,76.6774);
266 //
267 tpci->DefineSection(2,74.0,61.2,76.6774);
268 //
269 tpci->DefineSection(3,253.6,65.9,76.6774);
270 //
271 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
272 //
273 // now the inner field cage - only part of flanges (2 copies)
274 //
275 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
276 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
277 //
278 //---------------------------------------------------------
279 // Tpc Inner Containment vessel - Muon side
280 //---------------------------------------------------------
281 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
282 //
283 tcms->DefineSection(0,-259.1,68.1,74.2);
284 tcms->DefineSection(1,-253.6,68.1,74.2);
285 //
286 tcms->DefineSection(2,-253.6,68.1,68.4);
287 tcms->DefineSection(3,-74.0,60.9,61.2);
288 //
289 tcms->DefineSection(4,-74.0,60.1,61.2);
290 tcms->DefineSection(5,-73.3,60.1,61.2);
291 //
292 tcms->DefineSection(6,-73.3,56.9,61.2);
293 tcms->DefineSection(7,-73.0,56.9,61.2);
294 //
295 tcms->DefineSection(8,-73.0,56.9,58.8);
296 tcms->DefineSection(9,-71.3,56.9,58.8);
297 //
298 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
37831078 299 //-----------------------------------------------
c1637e41 300 // inner containment vessel - shaft side
37831078 301 //-----------------------------------------------
c1637e41 302 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
303 //
304 tcss->DefineSection(0,71.3,56.9,58.8);
305 tcss->DefineSection(1,73.0,56.9,58.8);
306 //
307 tcss->DefineSection(2,73.0,56.9,61.2);
308 tcss->DefineSection(3,73.3,56.9,61.2);
309 //
310 tcss->DefineSection(4,73.3,60.1,61.2);
311 tcss->DefineSection(5,74.0,60.1,61.2);
312 //
313 tcss->DefineSection(6,74.0,60.9,61.2);
314 tcss->DefineSection(7,253.6,65.6,65.9);
315 //
316 tcss->DefineSection(8,253.6,65.6,74.2);
317 tcss->DefineSection(9,258.1,65.6,74.2);
318 //
319 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
320 //-----------------------------------------------
321 // Inner field cage
322 // define 4 parts and make an assembly
323 //-----------------------------------------------
324 // part1 - Al - 2 copies
325 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
326 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
327 // sandwich - outermost parts - 2 copies
328 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
329 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
330 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
331 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
332 //
333 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
334 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
335 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
336 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
337 //
338 // middle parts - 2 copies
339 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
340 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
341 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
342 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
343 //
344 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
345 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
346 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
347 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
348 // central part - 1 copy
349 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
350 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
351 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
352 //
353 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
354 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
355 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
356 //
357 // inner part - positioning
358 //
359 // creating a sandwich
360 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
361 //
362 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
363 //
364 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
365 //
366 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
367 //
368 tv100->AddNode(tv10,1);
369 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
370 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
371 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
372 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
373 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
374 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
375 //
376 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
377 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
378 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
379 v9->AddNode(tv100,1);
380 //
381 // central drum
382 //
383 // flange + sandwich
384 //
385 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
386 cfl->DefineSection(0,-71.1,59.7,61.2);
387 cfl->DefineSection(1,-68.6,59.7,61.2);
388 //
389 cfl->DefineSection(2,-68.6,60.6324,61.2);
390 cfl->DefineSection(3,68.6,60.6324,61.2);
391 //
392 cfl->DefineSection(4,68.6,59.7,61.2);
393 cfl->DefineSection(5,71.1,59.7,61.2);
394 //
395 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
396 // sandwich
397 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
398 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
399 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
400 //
401 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
402 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
403 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
404 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
405 //
406 // seals for central drum 2 copies
407 //
408 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
409 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
410 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
411 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.));
412 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.));
413 //
414 // seal collars
415 TGeoPcon *se = new TGeoPcon(0.,360.,6);
416 se->DefineSection(0,-72.8,59.7,61.2);
417 se->DefineSection(1,-72.3,59.7,61.2);
418 //
419 se->DefineSection(2,-72.3,58.85,61.2);
420 se->DefineSection(3,-71.6,58.85,61.2);
421 //
422 se->DefineSection(4,-71.6,59.7,61.2);
423 se->DefineSection(5,-71.3,59.7,61.2);
424 //
425 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
426 //
427 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
428 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
429 //
430 // define reflection matrix
431 //
432 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,270.,180.,0.);
433 //
434 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
435 //
436 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-72.1));
437 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,72.1));
438 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
439 //
440 // central membrane - 2 rings and a mylar membrane - assembly
441 //
442 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
443 TGeoTube *oh = new TGeoTube(250.,256.,.5);
444 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
445 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
446 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
447 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
448 //
449 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
450 cm->AddNode(ihv,1);
451 cm->AddNode(ohv,1);
452 cm->AddNode(memv,1);
453 v9->AddNode(cm,1);
454 //
455 // end caps - they are make as an assembly of single segments
456 // containing both readout chambers
457 //
458 Double_t OpeningAngle = 10.*TMath::DegToRad();
459 Double_t thick=1.5; // rib
460 Double_t shift = thick/TMath::Sin(OpeningAngle);
461 //
462 Double_t LowEdge = 86.3; // hole in the wheel
463 Double_t UpEdge = 240.4; // hole in the wheel
464 //
465 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
466 //
467 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
468 //
469 hole->DefineSection(0,-3.5,LowEdge-shift,UpEdge-shift);
470 hole->DefineSection(1,-1.5,LowEdge-shift,UpEdge-shift);
471 //
472 hole->DefineSection(2,-1.5,LowEdge-shift,UpEdge+3.-shift);
473 hole->DefineSection(3,3.5,LowEdge-shift,UpEdge+3.-shift);
474 //
475 Double_t ys = shift*TMath::Sin(OpeningAngle);
476 Double_t xs = shift*TMath::Cos(OpeningAngle);
477 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
478 tr->RegisterYourself();
479 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
480 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
481 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
482 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
483 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
484 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
485 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
486 //
487 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
488 //
489 // readout chambers
490 //
491 // IROC first
492 //
493 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
494 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
495 // empty space
496 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
497 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
498 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
499 //bars
500 Double_t tga = (19.8328-12.3742)/39.3;
501 Double_t xmin,xmax;
502 xmin = 9.55*tga+12.3742;
503 xmax = 9.95*tga+12.3742;
504 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
505 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
506 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
507 xmin=19.4*tga+12.3742;
508 xmax=19.9*tga+12.3742;
509 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
510 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
511 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
512 xmin=29.35*tga+12.3742;
513 xmax=29.75*tga+12.3742;
514 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
515 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
516 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
517 //
518 // holes for connectors
519 //
520 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
521 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
522 ifstream in;
523 in.open("conn_iroc.dat", ios_base::in); // asci file
524 for(Int_t i =0;i<86;i++){
525 Double_t y = 3.9;
526 Double_t x,z,ang;
527 in>>x>>z>>ang;
528 TGeoRotation *rrr = new TGeoRotation();
529 rrr->RotateY(ang);
530 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
531 ibdv->AddNode(connv,i+1,trans);
532 }
533 in.close();
534 // "cap"
535 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
536 // "hole"
537 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
538 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
539 tr1->RegisterYourself();
540 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
541 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
542 //
543 // pad plane and wire fixations
544 //
545 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
546 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
547 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
548 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
549 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
550 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
551 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
552 //
553 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
554 //
555 iroc->AddNode(ibdv,1);
556 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
557 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
558 tga =(23.3521-14.5974)/49.65;
559 Double_t xx = 24.825*tga+14.5974-0.6;
560 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
561 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
562 //
563 // OROC
564 //
565 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
566 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
567 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
568 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
569 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
570 //horizontal bars
571 tga=(38.5084-20.2938)/99.3;
572 xmin=tga*10.2+20.2938;
573 xmax=tga*10.6+20.2938;
574 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
575 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
576 //
577 xmin=22.55*tga+20.2938;
578 xmax=24.15*tga+20.2938;
579 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
580 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
581 //
582 xmin=36.1*tga+20.2938;
583 xmax=36.5*tga+20.2938;
584 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
585 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
586 //
587 xmin=49.0*tga+20.2938;
588 xmax=50.6*tga+20.2938;
589 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
590 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
591 //
592 xmin=63.6*tga+20.2938;
593 xmax=64.0*tga+20.2938;
594 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
595 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
596 //
597 xmin=75.5*tga+20.2938;
598 xmax=77.15*tga+20.2938;
599 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
600 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
601 //
602 xmin=88.7*tga+20.2938;
603 xmax=89.1*tga+20.2938;
604 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
605 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
606 //
607 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
608 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
609 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
610 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
611 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
612 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
613 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
614 // vertical bars
615 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
616 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
617 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
618 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
619 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
620 //
621 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
622 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
623 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
624 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
625 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
626 //
627 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
628 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
629 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
630 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
631 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
632 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
633 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
634 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
635 //
636 // holes for connectors
637 //
638 in.open("conn_oroc.dat", ios_base::in); // asci file
639 for(Int_t i =0;i<78;i++){
640 Double_t y =3.89;
641 Double_t x,z,ang;
642 Double_t x1,z1,x2,z2;
643 in>>x>>z>>ang;
644 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
645 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
646 //
647 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
648 //
649 TGeoRotation *rr = new TGeoRotation();
650 rr->RotateY(ang);
651 z1-=54.95;
652 z2-=54.95;
653 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
654 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
655 obdv->AddNode(connv,i+1,trans1);
656 obdv->AddNode(connv,i+79,trans2);
657 }
658 in.close();
659 // cap
660 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
661 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
662 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
663 tr5->RegisterYourself();
664 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
665 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
666 //
667 // pad plane and wire fixations
668 //
669 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
670 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
671 //
672 tga=(43.5239-23.3874)/114.2;
673 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
674 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
675 xx = 57.1*tga+23.3874-0.7;
676 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
677 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
678 //
679 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
680 //
681 oroc->AddNode(obdv,1);
682 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
683 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
684 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
685 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
686 //
687 // now iroc and oroc are placed into a sector...
688 //
689 TGeoVolumeAssembly *sect = new TGeoVolumeAssembly("TPC_SECT");
690 TGeoRotation rot1("rot1",90.,90.,0.);
691 TGeoRotation rot2("rot2");
692 rot2.RotateY(10.);
693 TGeoRotation *rot = new TGeoRotation("rot");
694 *rot=rot1*rot2;
695 //
696 Double_t x0,y0;
697 x0=110.2*TMath::Cos(OpeningAngle);
698 y0=110.2*TMath::Sin(OpeningAngle);
699 TGeoCombiTrans *combi1 = new TGeoCombiTrans("combi1",x0,y0,1.09,rot);
700 x0=188.45*TMath::Cos(OpeningAngle);
701 y0=188.45*TMath::Sin(OpeningAngle);
702 TGeoCombiTrans *combi2 = new TGeoCombiTrans("combi2",x0,y0,0.99,rot);
703 //
704 sect->AddNode(ch,1);
705 sect->AddNode(iroc,1,combi1);
706 sect->AddNode(oroc,1,combi2);
707 //
708 // segment is ready...
709 // now I try to make a wheel...
710 //
711 TGeoVolumeAssembly *wheel = new TGeoVolumeAssembly("TPC_ENDCAP");
712 //
713 for(Int_t i =0;i<18;i++){
714 Double_t phi = (20.*i);
715 TGeoRotation *r = new TGeoRotation();
716 r->RotateZ(phi);
717 wheel->AddNode(sect,i+1,r);
718
719 }
720 // wheels in the drift volume!
721 v9->AddNode(wheel,1,new TGeoTranslation(0.,0.,-256.6));
722 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
723 v9->AddNode(wheel,2,combi3);
37831078 724
c1637e41 725 //_____________________________________________________________
726 // service support wheel
727 //_____________________________________________________________
728 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
729 sw->DefineSection(0,-4.,80.5,251.75);
730 sw->DefineSection(1,4.,80.5,251.75);
731 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
732 //
733 thick=1.;
734 shift = thick/TMath::Sin(OpeningAngle);
735 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
736 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
737 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
738 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
739 //
740 ys = shift*TMath::Sin(OpeningAngle);
741 xs = shift*TMath::Cos(OpeningAngle);
742 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
743 // cover
744 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
745 co->DefineSection(0,-0.5,77.,255.25);
746 co->DefineSection(1,0.5,77.,255.25);
747 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
748 // hole in a cover
749 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
750 shift=4./TMath::Sin(OpeningAngle);
751 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
752 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
753 //
754 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
755 //
756 ys = shift*TMath::Sin(OpeningAngle);
757 xs = shift*TMath::Cos(OpeningAngle);
758 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
759 //
760 // Sector as an Assembly
761 //
762 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
763 swhs->AddNode(swv,1);
764 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
765 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
766 //
767 // SSW as an Assembly of sectors
768 //
769 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
770 for(Int_t i =0;i<18;i++){
771 Double_t phi = (20.*i);
772 TGeoRotation *r = new TGeoRotation();
773 r->RotateZ(phi);
774 swheel->AddNode(swhs,i+1,r);
775 }
776 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
777 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
778 //
37831078 779 //----------------------------------------------------------
780 // TPc Support Rods - MAKROLON
781 //----------------------------------------------------------
c1637e41 782 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
783 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
784 // upper and lower rods differ in length!
785 Double_t *upar;
786 upar=NULL;
787 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
788 upar=new Double_t [3];
789 upar[0]=1.8;
790 upar[1]=2.2;
791
792 //
793 //HV rods - makrolon + 0.58cm (diameter) Cu
794 TGeoTube *hvr = new TGeoTube(0.,4.4,126.64);
795 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
796 //
797 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
798 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
799 hvrv->AddNode(hvcv,1);
800 for(Int_t i=0;i<17;i++){
801 Double_t angle,x,y;
802 Double_t z,r;
803 angle=TMath::DegToRad()*20.*(Double_t)i;
804 r=81.5;
805 x=r * TMath::Cos(angle);
806 y=r * TMath::Sin(angle);
807 upar[2]=126.64; //lower
808 z= 126.96;
809 if(i==15){
810 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
811 v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
79575d04 812 }
c1637e41 813 else{
814 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
815 gGeoManager->Node("TPC_Rod",i+18,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
816 }
817 r=254.25;
818 x=r * TMath::Cos(angle);
819 y=r * TMath::Sin(angle);
820 upar[2]=126.54; //upper
821 z=127.06;
822 gGeoManager->Node("TPC_Rod",i+36,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
823 gGeoManager->Node("TPC_Rod",i+54,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
37831078 824 }
825
37831078 826
c1637e41 827
828 gMC->Gspos("TPC_M ",1,"ALIC",0.,0.,0.,0,"ONLY");
37831078 829
830
831} // end of function
37831078 832
833//_____________________________________________________________________________
834void AliTPCv3::DrawDetector()
835{
836 //
79575d04 837 // Draw a shaded view of the Time Projection Chamber version 3
37831078 838 //
839
840
841 // Set everything unseen
842 gMC->Gsatt("*", "seen", -1);
843 //
844 // Set ALIC mother transparent
845 gMC->Gsatt("ALIC","SEEN",0);
846 //
847 // Set the volumes visible
848 //
849
850 gMC->Gsatt("TPC ","SEEN",0);
851 gMC->Gsatt("TOIN","SEEN",1);
852 gMC->Gsatt("TOIN","COLO",7);
37831078 853 gMC->Gsatt("TOCV","SEEN",1);
854 gMC->Gsatt("TOCV","COLO",4);
855 gMC->Gsatt("TSA1","SEEN",0);
856 gMC->Gsatt("TSA2","SEEN",0);
857 gMC->Gsatt("TSA3","SEEN",0);
79575d04 858 gMC->Gsatt("TSA4","SEEN",0);
859 gMC->Gsatt("TSA5","SEEN",0);
37831078 860 gMC->Gsatt("TOFC","SEEN",1);
861 gMC->Gsatt("TOFC","COLO",4);
37831078 862 gMC->Gsatt("TSA6","SEEN",0);
863 gMC->Gsatt("TSA7","SEEN",0);
79575d04 864 gMC->Gsatt("TSA8","SEEN",0);
37831078 865 gMC->Gsatt("TIIN","SEEN",1);
79575d04 866 gMC->Gsatt("TIIN","COLO",7);
867 gMC->Gsatt("TII1","SEEN",0);
868 gMC->Gsatt("TIFC","SEEN",1);
869 gMC->Gsatt("TIFC","COLO",4);
870 gMC->Gsatt("TSA9","SEEN",0);
37831078 871 gMC->Gsatt("TS10","SEEN",0);
872 gMC->Gsatt("TS11","SEEN",0);
873 gMC->Gsatt("TS12","SEEN",0);
37831078 874 gMC->Gsatt("TS13","SEEN",0);
875 gMC->Gsatt("TS14","SEEN",0);
79575d04 876 gMC->Gsatt("TICC","SEEN",0);
877 gMC->Gsatt("TICM","SEEN",0);
37831078 878 gMC->Gsatt("TS15","SEEN",0);
879 gMC->Gsatt("TS16","SEEN",0);
37831078 880 gMC->Gsatt("TS17","SEEN",0);
79575d04 881 gMC->Gsatt("TS18","SEEN",0);
882 gMC->Gsatt("TS19","SEEN",0);
883 gMC->Gsatt("TPJ1","SEEN",0);
884 gMC->Gsatt("TPJ2","SEEN",0);
885 gMC->Gsatt("TICS","SEEN",0);
886 gMC->Gsatt("TDGS","SEEN",0);
37831078 887 gMC->Gsatt("TIRC","SEEN",0);
888 gMC->Gsatt("TIC1","SEEN",1);
889 gMC->Gsatt("TIPP","SEEN",0);
890 gMC->Gsatt("TIC3","SEEN",0);
891 gMC->Gsatt("TRCE","SEEN",0);
892 gMC->Gsatt("TPSC","SEEN",0);
79575d04 893 gMC->Gsatt("TPCC","SEEN",0);
37831078 894 gMC->Gsatt("TORC","SEEN",0);
895 gMC->Gsatt("TOPP","SEEN",0);
896 gMC->Gsatt("TOC3","SEEN",0);
897 gMC->Gsatt("TOC1","SEEN",1);
898 gMC->Gsatt("TSSW","SEEN",1);
899 gMC->Gsatt("TSWC","SEEN",1);
37831078 900 gMC->Gsatt("TSSW","COLO",3);
901 gMC->Gsatt("TSWC","COLO",3);
902 gMC->Gsatt("TSCE","COLO",6);
79575d04 903 gMC->Gsatt("TSCE","SEEN",1);
37831078 904 gMC->Gsatt("TWES","SEEN",0);
905 gMC->Gsatt("TSWB","SEEN",0);
906 gMC->Gsatt("TPEL","SEEN",0);
907 gMC->Gsatt("TPMW","SEEN",1);
37831078 908 gMC->Gsatt("TESR","SEEN",1);
909 gMC->Gsatt("TPMW","COLO",12);
37831078 910 gMC->Gsatt("TIC1","COLO",5);
79575d04 911 gMC->Gsatt("TOC1","COLO",5);
37831078 912 gMC->Gsatt("TESB","SEEN",0);
37831078 913 gMC->Gsatt("THVM","SEEN",1);
914 gMC->Gsatt("THVM","COLO",11);
79575d04 915 gMC->Gsatt("THVH","SEEN",0);
916 gMC->Gsatt("TPSR","SEEN",0);
37831078 917 gMC->Gsatt("THVL","SEEN",0);
79575d04 918 gMC->Gsatt("THVC","SEEN",0);
37831078 919 gMC->Gsatt("THVE","SEEN",0);
920 gMC->Gsatt("THVR","SEEN",0);
921
922 //
923 gMC->Gdopt("hide", "on");
924 gMC->Gdopt("shad", "on");
925 gMC->Gsatt("*", "fill", 7);
926 gMC->SetClipBox(".");
927 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
928 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
929 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
930 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
931 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
932 gMC->DefaultRange();
933 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
934 gMC->Gdhead(1111, "Time Projection Chamber");
935 gMC->Gdman(18, 4, "MAN");
936 gMC->Gdopt("hide","off");
937}
938
939//_____________________________________________________________________________
940void AliTPCv3::CreateMaterials()
941{
942 //
943 // Define materials for version 2 of the Time Projection Chamber
944 //
945
946
947 //
948 AliTPC::CreateMaterials();
949}
950
951//_____________________________________________________________________________
952void AliTPCv3::Init()
953{
954 //
955 // Initialises version 3 of the TPC after that it has been built
956 //
957 Int_t *idtmed = fIdtmed->GetArray();
4b0fdcad 958
959 AliTPC::Init();
960
c1637e41 961 fIdSens=gMC->VolId("TPC_Drift"); // drift gas as a sensitive volume
4b0fdcad 962
963 gMC->SetMaxNStep(30000); // max. number of steps increased
964
37831078 965 gMC->Gstpar(idtmed[2],"LOSS",5);
4b0fdcad 966
13a8c8d7 967 printf("%s: *** TPC version 3 initialized***\n",ClassName());
968
969 printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
970
971 // printf("*** TPC version 3 initialized ***\n");
972 // printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
4b0fdcad 973
974 //
975
976}
977
978//_____________________________________________________________________________
979void AliTPCv3::StepManager()
980{
981 //
982 // Called for every step in the Time Projection Chamber
983 //
984
985 //
986 // parameters used for the energy loss calculations
987 //
73042f01 988 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
989 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
990 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
4b0fdcad 991
992
73042f01 993 const Float_t kbig = 1.e10;
4b0fdcad 994
995 Int_t id,copy;
996 TLorentzVector pos;
e61fd20d 997 Float_t hits[5];
4b0fdcad 998 Int_t vol[2];
4b0fdcad 999
1000 vol[1]=0;
1001 vol[0]=0;
1002
1003 //
1004
73042f01 1005 gMC->SetMaxStep(kbig);
4b0fdcad 1006
1007 if(!gMC->IsTrackAlive()) return; // particle has disappeared
1008
1009 Float_t charge = gMC->TrackCharge();
1010
1011 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1012
1013
1014 id=gMC->CurrentVolID(copy);
c1637e41 1015
4b0fdcad 1016
37831078 1017 if (id != fIdSens) return;
4b0fdcad 1018
1019 //
1020 // charged particle is in the sensitive volume
1021 //
1022
1023 if(gMC->TrackStep() > 0) {
1024
1025
73042f01 1026 Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
4b0fdcad 1027 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1028
1029 gMC->TrackPosition(pos);
1030 hits[0]=pos[0];
1031 hits[1]=pos[1];
1032 hits[2]=pos[2];
1033
e61fd20d 1034 // Get also the track time for pileup simulation
1035 hits[4]=gMC->TrackTime();
1036
4b0fdcad 1037 //
1038 // check the selected side of the TPC
1039 //
1040
1041 if(fSide && fSide*hits[2]<=0.) return;
1042
1043 hits[3]=(Float_t)nel;
1044
1045 // Add this hit
1046
5d12ce38 1047 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); //MI change
4b0fdcad 1048
1049 }
1050
1051 // Stemax calculation for the next step
1052
1053 Float_t pp;
1054 TLorentzVector mom;
1055 gMC->TrackMomentum(mom);
1056 Float_t ptot=mom.Rho();
73042f01 1057 Float_t betaGamma = ptot/gMC->TrackMass();
4b0fdcad 1058
69e40cce 1059 Int_t pid=gMC->TrackPid();
cc80f89e 1060 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
4b0fdcad 1061 {
73042f01 1062 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
4b0fdcad 1063 }
1064 else
1065 {
7b562732 1066 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3);
73042f01 1067 pp=kprim*BetheBloch(betaGamma);
4b0fdcad 1068 if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1069 }
1070
b9d0a01d 1071 Double_t rnd = gMC->GetRandom()->Rndm();
4b0fdcad 1072
1073 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1074
1075}
1076
1077//_____________________________________________________________________________
1078Float_t AliTPCv3::BetheBloch(Float_t bg)
1079{
1080 //
1081 // Bethe-Bloch energy loss formula
1082 //
73042f01 1083 const Double_t kp1=0.76176e-1;
1084 const Double_t kp2=10.632;
1085 const Double_t kp3=0.13279e-4;
1086 const Double_t kp4=1.8631;
1087 const Double_t kp5=1.9479;
4b0fdcad 1088
1089 Double_t dbg = (Double_t) bg;
1090
1091 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1092
73042f01 1093 Double_t aa = TMath::Power(beta,kp4);
1094 Double_t bb = TMath::Power(1./dbg,kp5);
4b0fdcad 1095
73042f01 1096 bb=TMath::Log(kp3+bb);
4b0fdcad 1097
73042f01 1098 return ((Float_t)((kp2-aa-bb)*kp1/aa));
4b0fdcad 1099}