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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
2a49965d 32#include <stdlib.h>
fe4da5cc 33
88cb7938 34#include <TLorentzVector.h>
fe4da5cc 35#include <TMath.h>
116cbefd 36#include <TPDGCode.h>
f77f13c8 37#include <TVirtualMC.h>
d9e80aca 38#include <TString.h>
39#include <TSystem.h>
bcac8ae4 40
fe4da5cc 41#include "AliConst.h"
f77f13c8 42#include "AliLog.h"
43#include "AliMC.h"
116cbefd 44#include "AliRun.h"
45#include "AliTPCDigitsArray.h"
73042f01 46#include "AliTPCParam.h"
47#include "AliTPCParamSR.h"
4ed5dced 48#include "AliTPCTrackHitsV2.h"
116cbefd 49#include "AliTPCv2.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"
58ClassImp(AliTPCv2)
59
60//_____________________________________________________________________________
61AliTPCv2::AliTPCv2(const char *name, const char *title) :
62 AliTPC(name, title)
63{
64 //
65 // Standard constructor for Time Projection Chamber version 2
66 //
6a905708 67
c1637e41 68 SetSens(-1); // no strips selected
37831078 69
37831078 70
c1637e41 71 SetBufferSize(128000);
79575d04 72
79575d04 73
c1637e41 74 if (fTPCParam)
75 fTPCParam->Write(fTPCParam->GetTitle());
76}
77
78//_____________________________________________________________________________
79void AliTPCv2::CreateGeometry()
80{
81 //
82 // Create the geometry of Time Projection Chamber version 2
83 //
84 //Begin_Html
85 /*
86 <img src="picts/AliTPC.gif">
87 */
88 //End_Html
89 //Begin_Html
90 /*
91 <img src="picts/AliTPCv2Tree.gif">
92 */
93 //End_Html
37831078 94
95 //----------------------------------------------------------
c1637e41 96 // This geometry is written using TGeo class
97 // Firstly the shapes are defined, and only then the volumes
98 // What is recognized by the MC are volumes
37831078 99 //----------------------------------------------------------
c1637e41 100 //
101 // tpc - this will be the mother volume
102 //
37831078 103
c1637e41 104 //
105 // here I define a volume TPC
106 // retrive the medium name with "TPC_" as a leading string
107 //
108 TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
109 tpc->DefineSection(0,-290.,77.,278.);
110 tpc->DefineSection(1,-259.6,77.,278.);
111 //
112 tpc->DefineSection(2,-259.6,68.1,278.);
113 tpc->DefineSection(3,-253.6,68.1,278.);
114 //
115 tpc->DefineSection(4,-253.6,68.,278.);
116 tpc->DefineSection(5,-74.0,60.8,278.);
117 //
118 tpc->DefineSection(6,-74.0,60.1,278.);
119 tpc->DefineSection(7,-73.3,60.1,278.);
120 //
121 tpc->DefineSection(8,-73.3,56.9,278.);
122 tpc->DefineSection(9,73.3,56.9,278.);
123 //
124 tpc->DefineSection(10,73.3,60.1,278.);
125 tpc->DefineSection(11,74.0,60.1,278.);
126 //
127 tpc->DefineSection(12,74.0,60.8,278.);
128 tpc->DefineSection(13,253.6,65.5,278.);
129 //
130 tpc->DefineSection(14,253.6,65.6,278.);
131 tpc->DefineSection(15,259.6,65.6,278.);
132 //
133 tpc->DefineSection(16,259.6,77.0,278.);
134 tpc->DefineSection(17,290.,77.,278.);
135 //
136 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
137 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
138 //
139 // drift volume - sensitive volume, extended beyond the
140 // endcaps, because of the alignment
141 //
142 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
143 dvol->DefineSection(0,-260.,74.5,264.4);
144 dvol->DefineSection(1,-253.6,74.5,264.4);
145 //
146 dvol->DefineSection(2,-253.6,76.6774,258.);
147 dvol->DefineSection(3,253.6,76.6774,258.);
148 //
149 dvol->DefineSection(4,253.6,74.5,264.4);
150 dvol->DefineSection(5,260.,74.5,264.4);
151 //
152 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
153 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
154 //
155 v1->AddNode(v9,1);
156 //
157 // outer insulator
158 //
159 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
160 //
161 tpco->DefineSection(0,-256.6,264.8,278.);
162 tpco->DefineSection(1,-253.6,264.8,278.);
163 //
164 tpco->DefineSection(2,-253.6,258.,278.);
165 tpco->DefineSection(3,250.6,258.,278.);
166 //
167 tpco->DefineSection(4,250.6,258.,275.5);
168 tpco->DefineSection(5,253.6,258.,275.5);
169 //
170 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
171 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
172 //
173 // outer containment vessel
174 //
175 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
176 //
177 tocv->DefineSection(0,-256.6,264.8,278.);
178 tocv->DefineSection(1,-253.6,264.8,278.);
179 //
180 tocv->DefineSection(2,-253.6,274.8124,278.);
181 tocv->DefineSection(3,247.6,274.8124,278.);
182 //
183 tocv->DefineSection(4,247.6,270.4,278.);
184 tocv->DefineSection(5,250.6,270.4,278.);
185 //
186 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
187 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
188 //
189 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
190 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
191 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
192 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
193 //
194 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
195 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
196 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
197 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
198 //
199 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
200 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
201 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
202 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
203 //-------------------------------------------------------
204 // Tpc Outer Field Cage
205 // daughters - composite (sandwich)
206 //-------------------------------------------------------
37831078 207
c1637e41 208 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
209 //
210 tofc->DefineSection(0,-253.6,258.,269.6);
211 tofc->DefineSection(1,-250.6,258.,269.6);
212 //
213 tofc->DefineSection(2,-250.6,258.,260.0676);
214 tofc->DefineSection(3,250.6,258.,260.0676);
215 //
216 tofc->DefineSection(4,250.6,258.,275.5);
217 tofc->DefineSection(5,253.6,258.,275.5);
218 //
219 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
220 //sandwich
221 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
222 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
223 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
224 //
225 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
226 //
227 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
228 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
229 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
230 //
231 // outer part - positioning
232 //
233 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
234 //
235 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
236 //
237 v3->AddNode(tov1,1); v4->AddNode(tf1v,1);
238 //
239 v2->AddNode(v3,1); v2->AddNode(v4,1);
240 //
241 v1->AddNode(v2,1);
242 //--------------------------------------------------------------------
243 // Tpc Inner INsulator (CO2)
244 // the cones, the central drum and the inner f.c. sandwich with a piece
245 // of the flane will be placed in the TPC
246 //--------------------------------------------------------------------
247 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
248 //
249 tpci->DefineSection(0,-253.6,68.4,76.6774);
250 tpci->DefineSection(1,-74.0,61.2,76.6774);
251 //
252 tpci->DefineSection(2,74.0,61.2,76.6774);
253 //
254 tpci->DefineSection(3,253.6,65.9,76.6774);
255 //
256 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
257 //
258 // now the inner field cage - only part of flanges (2 copies)
259 //
260 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
261 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
262 //
263 //---------------------------------------------------------
264 // Tpc Inner Containment vessel - Muon side
265 //---------------------------------------------------------
266 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
267 //
268 tcms->DefineSection(0,-259.1,68.1,74.2);
269 tcms->DefineSection(1,-253.6,68.1,74.2);
270 //
271 tcms->DefineSection(2,-253.6,68.1,68.4);
272 tcms->DefineSection(3,-74.0,60.9,61.2);
273 //
274 tcms->DefineSection(4,-74.0,60.1,61.2);
275 tcms->DefineSection(5,-73.3,60.1,61.2);
276 //
277 tcms->DefineSection(6,-73.3,56.9,61.2);
278 tcms->DefineSection(7,-73.0,56.9,61.2);
279 //
280 tcms->DefineSection(8,-73.0,56.9,58.8);
281 tcms->DefineSection(9,-71.3,56.9,58.8);
282 //
283 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
284 //-----------------------------------------------
285 // inner containment vessel - shaft side
286 //-----------------------------------------------
287 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
288 //
289 tcss->DefineSection(0,71.3,56.9,58.8);
290 tcss->DefineSection(1,73.0,56.9,58.8);
291 //
292 tcss->DefineSection(2,73.0,56.9,61.2);
293 tcss->DefineSection(3,73.3,56.9,61.2);
294 //
295 tcss->DefineSection(4,73.3,60.1,61.2);
296 tcss->DefineSection(5,74.0,60.1,61.2);
297 //
298 tcss->DefineSection(6,74.0,60.9,61.2);
299 tcss->DefineSection(7,253.6,65.6,65.9);
300 //
301 tcss->DefineSection(8,253.6,65.6,74.2);
302 tcss->DefineSection(9,258.1,65.6,74.2);
303 //
304 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
305 //-----------------------------------------------
306 // Inner field cage
307 // define 4 parts and make an assembly
308 //-----------------------------------------------
309 // part1 - Al - 2 copies
310 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
311 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
312 // sandwich - outermost parts - 2 copies
313 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
314 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
315 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
316 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
317 //
318 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
319 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
320 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
321 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
322 //
323 // middle parts - 2 copies
324 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
325 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
326 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
327 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
328 //
329 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
330 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
331 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
332 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
333 // central part - 1 copy
334 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
335 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
336 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
337 //
338 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
339 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
340 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
341 //
342 // inner part - positioning
343 //
344 // creating a sandwich
345 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
346 //
347 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
348 //
349 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
350 //
351 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
352 //
353 tv100->AddNode(tv10,1);
354 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
355 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
356 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
357 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
358 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
359 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
360 //
361 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
362 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
363 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
364 v9->AddNode(tv100,1);
365 //
366 // central drum
367 //
368 // flange + sandwich
369 //
370 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
371 cfl->DefineSection(0,-71.1,59.7,61.2);
372 cfl->DefineSection(1,-68.6,59.7,61.2);
373 //
374 cfl->DefineSection(2,-68.6,60.6324,61.2);
375 cfl->DefineSection(3,68.6,60.6324,61.2);
376 //
377 cfl->DefineSection(4,68.6,59.7,61.2);
378 cfl->DefineSection(5,71.1,59.7,61.2);
379 //
380 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
381 // sandwich
382 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
383 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
384 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
385 //
386 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
387 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
388 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
389 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
390 //
391 // seals for central drum 2 copies
392 //
393 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
394 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
395 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
396 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.));
397 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.));
398 //
399 // seal collars
400 TGeoPcon *se = new TGeoPcon(0.,360.,6);
401 se->DefineSection(0,-72.8,59.7,61.2);
402 se->DefineSection(1,-72.3,59.7,61.2);
403 //
404 se->DefineSection(2,-72.3,58.85,61.2);
405 se->DefineSection(3,-71.6,58.85,61.2);
406 //
407 se->DefineSection(4,-71.6,59.7,61.2);
408 se->DefineSection(5,-71.3,59.7,61.2);
409 //
410 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
411 //
412 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
413 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
414 //
415 // define reflection matrix
416 //
417 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,270.,180.,0.);
418 //
419 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
420 //
421 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-72.1));
422 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,72.1));
423 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
424 //
425 // central membrane - 2 rings and a mylar membrane - assembly
426 //
427 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
428 TGeoTube *oh = new TGeoTube(250.,256.,.5);
429 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
430 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
431 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
432 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
433 //
434 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
435 cm->AddNode(ihv,1);
436 cm->AddNode(ohv,1);
437 cm->AddNode(memv,1);
438 v9->AddNode(cm,1);
439 //
440 // end caps - they are make as an assembly of single segments
441 // containing both readout chambers
442 //
443 Double_t OpeningAngle = 10.*TMath::DegToRad();
444 Double_t thick=1.5; // rib
445 Double_t shift = thick/TMath::Sin(OpeningAngle);
446 //
447 Double_t LowEdge = 86.3; // hole in the wheel
448 Double_t UpEdge = 240.4; // hole in the wheel
449 //
450 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
451 //
452 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
453 //
454 hole->DefineSection(0,-3.5,LowEdge-shift,UpEdge-shift);
455 hole->DefineSection(1,-1.5,LowEdge-shift,UpEdge-shift);
456 //
457 hole->DefineSection(2,-1.5,LowEdge-shift,UpEdge+3.-shift);
458 hole->DefineSection(3,3.5,LowEdge-shift,UpEdge+3.-shift);
459 //
460 Double_t ys = shift*TMath::Sin(OpeningAngle);
461 Double_t xs = shift*TMath::Cos(OpeningAngle);
462 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
463 tr->RegisterYourself();
464 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
465 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
466 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
467 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
468 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
469 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
470 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
471 //
472 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
473 //
474 // readout chambers
475 //
476 // IROC first
477 //
478 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
479 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
480 // empty space
481 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
482 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
483 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
484 //bars
485 Double_t tga = (19.8328-12.3742)/39.3;
486 Double_t xmin,xmax;
487 xmin = 9.55*tga+12.3742;
488 xmax = 9.95*tga+12.3742;
489 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
490 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
491 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
492 xmin=19.4*tga+12.3742;
493 xmax=19.9*tga+12.3742;
494 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
495 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
496 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
497 xmin=29.35*tga+12.3742;
498 xmax=29.75*tga+12.3742;
499 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
500 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
501 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
502 //
503 // holes for connectors
504 //
505 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
506 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
d9e80aca 507 TString fileName(gSystem->Getenv("ALICE_ROOT"));
508 fileName += "/TPC/conn_iroc.dat";
c1637e41 509 ifstream in;
d9e80aca 510 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 511 for(Int_t i =0;i<86;i++){
512 Double_t y = 3.9;
513 Double_t x,z,ang;
514 in>>x>>z>>ang;
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 //
678 TGeoVolumeAssembly *sect = new TGeoVolumeAssembly("TPC_SECT");
679 TGeoRotation rot1("rot1",90.,90.,0.);
680 TGeoRotation rot2("rot2");
681 rot2.RotateY(10.);
682 TGeoRotation *rot = new TGeoRotation("rot");
683 *rot=rot1*rot2;
684 //
685 Double_t x0,y0;
686 x0=110.2*TMath::Cos(OpeningAngle);
687 y0=110.2*TMath::Sin(OpeningAngle);
688 TGeoCombiTrans *combi1 = new TGeoCombiTrans("combi1",x0,y0,1.09,rot);
689 x0=188.45*TMath::Cos(OpeningAngle);
690 y0=188.45*TMath::Sin(OpeningAngle);
691 TGeoCombiTrans *combi2 = new TGeoCombiTrans("combi2",x0,y0,0.99,rot);
692 //
693 sect->AddNode(ch,1);
694 sect->AddNode(iroc,1,combi1);
695 sect->AddNode(oroc,1,combi2);
696 //
697 // segment is ready...
698 // now I try to make a wheel...
699 //
700 TGeoVolumeAssembly *wheel = new TGeoVolumeAssembly("TPC_ENDCAP");
701 //
702 for(Int_t i =0;i<18;i++){
703 Double_t phi = (20.*i);
704 TGeoRotation *r = new TGeoRotation();
705 r->RotateZ(phi);
706 wheel->AddNode(sect,i+1,r);
79575d04 707
c1637e41 708 }
709 // wheels in the drift volume!
710 v9->AddNode(wheel,1,new TGeoTranslation(0.,0.,-256.6));
711 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
712 v9->AddNode(wheel,2,combi3);
713
714 //_____________________________________________________________
715 // service support wheel
716 //_____________________________________________________________
717 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
718 sw->DefineSection(0,-4.,80.5,251.75);
719 sw->DefineSection(1,4.,80.5,251.75);
720 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
721 //
722 thick=1.;
723 shift = thick/TMath::Sin(OpeningAngle);
724 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
725 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
726 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
727 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
728 //
729 ys = shift*TMath::Sin(OpeningAngle);
730 xs = shift*TMath::Cos(OpeningAngle);
731 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
732 // cover
733 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
734 co->DefineSection(0,-0.5,77.,255.25);
735 co->DefineSection(1,0.5,77.,255.25);
736 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
737 // hole in a cover
738 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
739 shift=4./TMath::Sin(OpeningAngle);
740 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
741 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
742 //
743 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
744 //
745 ys = shift*TMath::Sin(OpeningAngle);
746 xs = shift*TMath::Cos(OpeningAngle);
747 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
748 //
749 // Sector as an Assembly
750 //
751 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
752 swhs->AddNode(swv,1);
753 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
754 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
755 //
756 // SSW as an Assembly of sectors
757 //
758 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
759 for(Int_t i =0;i<18;i++){
760 Double_t phi = (20.*i);
761 TGeoRotation *r = new TGeoRotation();
762 r->RotateZ(phi);
763 swheel->AddNode(swhs,i+1,r);
764 }
765 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
766 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
767
768 // sensitive strips - strip "0" is always set
769 // conditional
770 Int_t totrows;
771 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
772 Double_t *upar;
773 upar=NULL;
774 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
775 upar=new Double_t [10];
776 upar[0]=0.;
777 upar[1]=360.;
778 upar[2]=18.;
779 upar[3]=2.;
780 //
781 upar[4]=-124.8;
782 upar[7]=124.8;
783
784 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
785
786 upar[5]=rlow;
787 upar[6]=rlow+.01;
788 upar[8]=upar[5];
789 upar[9]=upar[6];
790 //
791 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
792 gGeoManager->Node("TPC_Strip",totrows+1,
793 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
794 //
795 // now, strips optionally
796 //
797 if(fSens){
798 //lower sectors
799 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
800 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
801 upar[5]=rlow;
802 upar[6]=rlow+.01;
803 upar[8]=upar[5];
804 upar[9]=upar[6];
805 gGeoManager->Node("TPC_Strip",i,
806 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
807 gGeoManager->Node("TPC_Strip",totrows+i,
808 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
809 }
810 //upper sectors
811 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
812 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
813 upar[5]=rlow;
814 upar[6]=rlow+.01;
815 upar[8]=upar[5];
816 upar[9]=upar[6];
817 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
818 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
819 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
820 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
821 }
822 }//strips
37831078 823 //----------------------------------------------------------
c1637e41 824 // TPc Support Rods - MAKROLON
37831078 825 //----------------------------------------------------------
c1637e41 826 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
827 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
828 // upper and lower rods differ in length!
829 delete [] upar;
830 upar=NULL;
831 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
832 upar=new Double_t [3];
833 upar[0]=1.8;
834 upar[1]=2.2;
835
79575d04 836 //
c1637e41 837 //HV rods - makrolon + 0.58cm (diameter) Cu
838 TGeoTube *hvr = new TGeoTube(0.,4.4,126.64);
839 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
840 //
841 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
842 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
843 hvrv->AddNode(hvcv,1);
844
845 for(Int_t i=0;i<17;i++){
846 Double_t angle,x,y;
847 Double_t z,r;
848 angle=TMath::DegToRad()*20.*(Double_t)i;
849 r=81.5;
850 x=r * TMath::Cos(angle);
851 y=r * TMath::Sin(angle);
852 upar[2]=126.64; //lower
853 z= 126.96;
854 if(i==15){
855 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
856 v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
857 }
858 else{
859 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
860 gGeoManager->Node("TPC_Rod",i+18,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
861 }
862 r=254.25;
863 x=r * TMath::Cos(angle);
864 y=r * TMath::Sin(angle);
865 upar[2]=126.54; //upper
866 z=127.06;
867 gGeoManager->Node("TPC_Rod",i+36,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
868 gGeoManager->Node("TPC_Rod",i+54,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
869 }
79575d04 870
c1637e41 871
872 gMC->Gspos("TPC_M ",1,"ALIC",0.,0.,0.,0,"ONLY");
37831078 873
874} // end of function
875
876//_____________________________________________________________________________
877void AliTPCv2::DrawDetector()
878{
879 //
880 // Draw a shaded view of the Time Projection Chamber version 1
881 //
882
883 // Set everything unseen
884 gMC->Gsatt("*", "seen", -1);
885 //
886 // Set ALIC mother transparent
887 gMC->Gsatt("ALIC","SEEN",0);
888 //
889 // Set the volumes visible
890 //
891
892 gMC->Gsatt("TPC ","SEEN",0);
893 gMC->Gsatt("TOIN","SEEN",1);
894 gMC->Gsatt("TOIN","COLO",7);
37831078 895 gMC->Gsatt("TOCV","SEEN",1);
896 gMC->Gsatt("TOCV","COLO",4);
897 gMC->Gsatt("TSA1","SEEN",0);
898 gMC->Gsatt("TSA2","SEEN",0);
899 gMC->Gsatt("TSA3","SEEN",0);
79575d04 900 gMC->Gsatt("TSA4","SEEN",0);
901 gMC->Gsatt("TSA5","SEEN",0);
37831078 902 gMC->Gsatt("TOFC","SEEN",1);
903 gMC->Gsatt("TOFC","COLO",4);
37831078 904 gMC->Gsatt("TSA6","SEEN",0);
905 gMC->Gsatt("TSA7","SEEN",0);
79575d04 906 gMC->Gsatt("TSA8","SEEN",0);
37831078 907 gMC->Gsatt("TIIN","SEEN",1);
79575d04 908 gMC->Gsatt("TIIN","COLO",7);
909 gMC->Gsatt("TII1","SEEN",0);
910 gMC->Gsatt("TIFC","SEEN",1);
911 gMC->Gsatt("TIFC","COLO",4);
912 gMC->Gsatt("TSA9","SEEN",0);
37831078 913 gMC->Gsatt("TS10","SEEN",0);
914 gMC->Gsatt("TS11","SEEN",0);
915 gMC->Gsatt("TS12","SEEN",0);
37831078 916 gMC->Gsatt("TS13","SEEN",0);
917 gMC->Gsatt("TS14","SEEN",0);
79575d04 918 gMC->Gsatt("TICC","SEEN",0);
919 gMC->Gsatt("TICM","SEEN",0);
37831078 920 gMC->Gsatt("TS15","SEEN",0);
921 gMC->Gsatt("TS16","SEEN",0);
37831078 922 gMC->Gsatt("TS17","SEEN",0);
79575d04 923 gMC->Gsatt("TS18","SEEN",0);
924 gMC->Gsatt("TS19","SEEN",0);
925 gMC->Gsatt("TPJ1","SEEN",0);
926 gMC->Gsatt("TPJ2","SEEN",0);
927 gMC->Gsatt("TICS","SEEN",0);
928 gMC->Gsatt("TDGN","SEEN",0);
37831078 929 gMC->Gsatt("TIRC","SEEN",0);
930 gMC->Gsatt("TIC1","SEEN",1);
931 gMC->Gsatt("TIPP","SEEN",0);
932 gMC->Gsatt("TIC3","SEEN",0);
933 gMC->Gsatt("TRCE","SEEN",0);
934 gMC->Gsatt("TPSC","SEEN",0);
79575d04 935 gMC->Gsatt("TPCC","SEEN",0);
37831078 936 gMC->Gsatt("TORC","SEEN",0);
937 gMC->Gsatt("TOPP","SEEN",0);
938 gMC->Gsatt("TOC3","SEEN",0);
939 gMC->Gsatt("TOC1","SEEN",1);
940 gMC->Gsatt("TSSW","SEEN",1);
941 gMC->Gsatt("TSWC","SEEN",1);
37831078 942 gMC->Gsatt("TSSW","COLO",3);
943 gMC->Gsatt("TSWC","COLO",3);
944 gMC->Gsatt("TSCE","COLO",6);
79575d04 945 gMC->Gsatt("TSCE","SEEN",1);
37831078 946 gMC->Gsatt("TWES","SEEN",0);
947 gMC->Gsatt("TSWB","SEEN",0);
948 gMC->Gsatt("TPEL","SEEN",0);
949 gMC->Gsatt("TPMW","SEEN",1);
37831078 950 gMC->Gsatt("TESR","SEEN",1);
951 gMC->Gsatt("TPMW","COLO",12);
37831078 952 gMC->Gsatt("TIC1","COLO",5);
79575d04 953 gMC->Gsatt("TOC1","COLO",5);
37831078 954 gMC->Gsatt("TESB","SEEN",0);
37831078 955 gMC->Gsatt("THVM","SEEN",1);
956 gMC->Gsatt("THVM","COLO",11);
79575d04 957 gMC->Gsatt("THVH","SEEN",0);
958 gMC->Gsatt("TPSR","SEEN",0);
37831078 959 gMC->Gsatt("THVL","SEEN",0);
79575d04 960 gMC->Gsatt("THVC","SEEN",0);
37831078 961 gMC->Gsatt("THVE","SEEN",0);
962 gMC->Gsatt("THVR","SEEN",0);
79575d04 963 gMC->Gsatt("TPSS","SEEN",0);
964 gMC->Gsatt("TPUS","SEEN",0);
965 gMC->Gsatt("TPLS","SEEN",0);
37831078 966
967 //
968 gMC->Gdopt("hide", "on");
969 gMC->Gdopt("shad", "on");
970 gMC->Gsatt("*", "fill", 7);
971 gMC->SetClipBox(".");
972 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
973 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
974 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
975 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
976 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
977 gMC->DefaultRange();
978 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
979 gMC->Gdhead(1111, "Time Projection Chamber");
980 gMC->Gdman(18, 4, "MAN");
981 gMC->Gdopt("hide","off");
982}
983
984//_____________________________________________________________________________
985void AliTPCv2::CreateMaterials()
986{
987 //
988 // Define materials for version 2 of the Time Projection Chamber
989 //
990
991 AliTPC::CreateMaterials();
992}
993
994//_____________________________________________________________________________
995void AliTPCv2::Init()
996{
997 //
998 // Initialises version 2 of the TPC after that it has been built
999 //
1000
1001 Int_t *idtmed = fIdtmed->GetArray();
1002
1003 AliTPC::Init();
d4c354b9 1004
c1637e41 1005
1006 fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected...
d4c354b9 1007
c1637e41 1008 fIDrift=gMC->VolId("TPC_Drift");
1009 fSecOld=-100; // fake number
37831078 1010
1011 gMC->SetMaxNStep(30000); // max. number of steps increased
1012
1013 gMC->Gstpar(idtmed[2],"LOSS",5); // specific energy loss
1014
f77f13c8 1015 AliInfo("*** TPC version 2 initialized ***");
1016 AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
37831078 1017
1018 //
fe4da5cc 1019
1020}
1021
1022//_____________________________________________________________________________
1023void AliTPCv2::StepManager()
1024{
1025 //
1026 // Called for every step in the Time Projection Chamber
1027 //
1028
1029 //
1030 // parameters used for the energy loss calculations
1031 //
73042f01 1032 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1033 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1034 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
fe4da5cc 1035
1036
73042f01 1037 const Float_t kbig = 1.e10;
fe4da5cc 1038
1039 Int_t id,copy;
e61fd20d 1040 Float_t hits[5];
fe4da5cc 1041 Int_t vol[2];
37831078 1042 TLorentzVector p;
fe4da5cc 1043
37831078 1044 vol[1]=0; // preset row number to 0
fe4da5cc 1045 //
73042f01 1046 gMC->SetMaxStep(kbig);
fe4da5cc 1047
0a6d8768 1048 if(!gMC->IsTrackAlive()) return; // particle has disappeared
fe4da5cc 1049
cfce8870 1050 Float_t charge = gMC->TrackCharge();
fe4da5cc 1051
1052 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1053
37831078 1054 // check the sensitive volume
1055
c1637e41 1056 id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1057 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
da33556f 1058
c1637e41 1059 gMC->TrackPosition(p);
1060 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1061 //
1062
1063 //
1064 Double_t angle = TMath::ACos(p[0]/r);
1065 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1066 //
1067 // angular segment, it is not a real sector number...
1068 //
1069 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1070 fTPCParam->GetInnerAngle());
1071 // rotate to segment "0"
1072 Float_t cos,sin;
1073 fTPCParam->AdjustCosSin(sector,cos,sin);
1074 Float_t x1=p[0]*cos + p[1]*sin;
1075 // check if within sector's limits
1076 if(x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp()
1077 ||x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp()){
1078 // calculate real sector number...
1079 if (x1>fTPCParam->GetOuterRadiusLow()){
1080 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1081 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1082 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
37831078 1083 }
c1637e41 1084 else
1085 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1086 //
1087 // here I have a sector number
1088 //
37831078 1089
c1637e41 1090 vol[0]=sector;
1091 // check if change of sector
1092 if(sector != fSecOld){
1093 fSecOld=sector;
1094 // add track reference
1095 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
1096 }
1097 // track is in the sensitive strip
1098 if(id == fIdSens){
1099 // track is entering the strip
1100 if (gMC->IsTrackEntering()){
1101 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1102 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1103 // row numbers are autonomous for lower and upper sectors
1104 if(vol[0] > fTPCParam->GetNInnerSector()) {
1105 vol[1] -= fTPCParam->GetNRowLow();
1106 }
1107 //
1108 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
37831078 1109
c1637e41 1110 // lower sector, row 0, because Jouri wants to have this
37831078 1111
c1637e41 1112 gMC->TrackMomentum(p);
1113 hits[0]=p[0];
1114 hits[1]=p[1];
1115 hits[2]=p[2];
1116 hits[3]=0.; // this hit has no energy loss
1117 // Get also the track time for pileup simulation
1118 hits[4]=gMC->TrackTime();
6a905708 1119
c1637e41 1120 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1121 }
1122 //
e61fd20d 1123
c1637e41 1124 gMC->TrackPosition(p);
1125 hits[0]=p[0];
1126 hits[1]=p[1];
1127 hits[2]=p[2];
1128 hits[3]=0.; // this hit has no energy loss
1129 // Get also the track time for pileup simulation
1130 hits[4]=gMC->TrackTime();
930ee558 1131
c1637e41 1132 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
37831078 1133
c1637e41 1134 }
1135 else return;
1136 }
37831078 1137 //-----------------------------------------------------------------
c1637e41 1138 // charged particle is in the sensitive drift volume
37831078 1139 //-----------------------------------------------------------------
cfce8870 1140 if(gMC->TrackStep() > 0) {
c1637e41 1141
73042f01 1142 Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
fe4da5cc 1143 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
c1637e41 1144 //
37831078 1145 gMC->TrackPosition(p);
1146 hits[0]=p[0];
1147 hits[1]=p[1];
1148 hits[2]=p[2];
fe4da5cc 1149 hits[3]=(Float_t)nel;
c1637e41 1150
fe4da5cc 1151 // Add this hit
c1637e41 1152
6a905708 1153 if (fHitType&&2){
1154 gMC->TrackMomentum(p);
1155 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1156 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
1157 fTrackHits->SetHitPrecision(precision);
1158 }
e61fd20d 1159
1160 // Get also the track time for pileup simulation
1161 hits[4]=gMC->TrackTime();
c1637e41 1162
1163 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
e61fd20d 1164
c1637e41 1165 } // step>0
1166 } //within sector's limits
fe4da5cc 1167 // Stemax calculation for the next step
1168
1169 Float_t pp;
0a6d8768 1170 TLorentzVector mom;
1171 gMC->TrackMomentum(mom);
1172 Float_t ptot=mom.Rho();
73042f01 1173 Float_t betaGamma = ptot/gMC->TrackMass();
fe4da5cc 1174
69e40cce 1175 Int_t pid=gMC->TrackPid();
cc80f89e 1176 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
fe4da5cc 1177 {
73042f01 1178 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
fe4da5cc 1179 }
1180 else
1181 {
595bf2c3 1182
07521998 1183 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
595bf2c3 1184 pp=kprim*BetheBloch(betaGamma);
1185
fe4da5cc 1186 if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1187 }
1188
b9d0a01d 1189 Double_t rnd = gMC->GetRandom()->Rndm();
fe4da5cc 1190
cfce8870 1191 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
fe4da5cc 1192
c1637e41 1193
fe4da5cc 1194}
1195
1196//_____________________________________________________________________________
1197Float_t AliTPCv2::BetheBloch(Float_t bg)
1198{
1199 //
1200 // Bethe-Bloch energy loss formula
1201 //
73042f01 1202 const Double_t kp1=0.76176e-1;
1203 const Double_t kp2=10.632;
1204 const Double_t kp3=0.13279e-4;
1205 const Double_t kp4=1.8631;
1206 const Double_t kp5=1.9479;
fe4da5cc 1207
1208 Double_t dbg = (Double_t) bg;
1209
1210 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1211
73042f01 1212 Double_t aa = TMath::Power(beta,kp4);
1213 Double_t bb = TMath::Power(1./dbg,kp5);
fe4da5cc 1214
73042f01 1215 bb=TMath::Log(kp3+bb);
fe4da5cc 1216
73042f01 1217 return ((Float_t)((kp2-aa-bb)*kp1/aa));
fe4da5cc 1218}
73042f01 1219
1220