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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"
b40afa5e 44#include "AliMathBase.h"
cc80f89e 45#include "AliTPCDigitsArray.h"
4c475d27 46#include "AliTPCParam.h"
47#include "AliTPCParamSR.h"
4ed5dced 48#include "AliTPCTrackHitsV2.h"
116cbefd 49#include "AliTPCv3.h"
5d12ce38 50#include "AliMC.h"
c1637e41 51#include "TGeoManager.h"
52#include "TGeoVolume.h"
c5d5037c 53#include "TGeoCone.h"
c1637e41 54#include "TGeoPcon.h"
55#include "TGeoTube.h"
56#include "TGeoPgon.h"
57#include "TGeoTrd1.h"
58#include "TGeoCompositeShape.h"
59#include "TGeoPara.h"
4b0fdcad 60
a11596ad 61using std::ifstream;
62using std::ios_base;
4b0fdcad 63ClassImp(AliTPCv3)
79575d04 64//_____________________________________________________________________________
65
179c6296 66 AliTPCv3::AliTPCv3():AliTPC(),fIdSens(0)
67{
79575d04 68
69 fHitType = 1;
70
71}
72
4b0fdcad 73//_____________________________________________________________________________
74AliTPCv3::AliTPCv3(const char *name, const char *title) :
179c6296 75 AliTPC(name, title), fIdSens(0)
4b0fdcad 76{
77 //
cc80f89e 78 // Standard constructor for Time Projection Chamber version 3
4b0fdcad 79 //
80
81 SetBufferSize(128000);
73042f01 82
83 if (fTPCParam)
84 fTPCParam->Write(fTPCParam->GetTitle());
79575d04 85
86 fHitType =1;
4b0fdcad 87}
88
89//_____________________________________________________________________________
90void AliTPCv3::CreateGeometry()
91{
92 //
cc80f89e 93 // Creation of the TPC coarse geometry (version 3)
37831078 94 // The whole drift volume is sensitive
cc80f89e 95 // Origin Marek Kowalski Cracow
4b0fdcad 96 //
97 //Begin_Html
98 /*
37831078 99 <img src="picts/AliTPCgif">
4b0fdcad 100 */
101 //End_Html
102 //Begin_Html
103 /*
37831078 104 <img src="picts/AliTPCv3Tree.gif">
4b0fdcad 105 */
106 //End_Html
c1637e41 107 //----------------------------------------------------------
108 // This geometry is written using TGeo class
109 // Firstly the shapes are defined, and only then the volumes
110 // What is recognized by the MC are volumes
111 //----------------------------------------------------------
37831078 112 //
c1637e41 113 // tpc - this will be the mother volume
37831078 114 //
1283eee5 115
37831078 116 //
c1637e41 117 // here I define a volume TPC
118 // retrive the medium name with "TPC_" as a leading string
4b0fdcad 119 //
8ad31ee5 120 TGeoPcon *tpc = new TGeoPcon(0.,360.,30); //30 sections
4b0fdcad 121 //
8ad31ee5 122 tpc->DefineSection(0,-289.6,77.,278.);
123 tpc->DefineSection(1,-262.1,77.,278.);
4b0fdcad 124 //
8ad31ee5 125 tpc->DefineSection(2,-262.1,83.1,278.);
126 tpc->DefineSection(3,-260.,83.1,278.);
4b0fdcad 127 //
8ad31ee5 128 tpc->DefineSection(4,-260.,70.,278.);
129 tpc->DefineSection(5,-259.6,70.,278.);
4b0fdcad 130 //
8ad31ee5 131 tpc->DefineSection(6,-259.6,68.1,278.);
132 tpc->DefineSection(7,-253.6,68.1,278.);
37831078 133 //
c5d5037c 134 tpc->DefineSection(8,-253.6,67.88,278.);//hs
135 tpc->DefineSection(9,-74.0,60.68,278.);// hs
37831078 136 //
8ad31ee5 137 tpc->DefineSection(10,-74.0,60.1,278.);
138 tpc->DefineSection(11,-73.3,60.1,278.);
79575d04 139 //
8ad31ee5 140 tpc->DefineSection(12,-73.3,56.9,278.);
141 tpc->DefineSection(13,-68.5,56.9,278.);
c1637e41 142 //
8ad31ee5 143 tpc->DefineSection(14,-68.5,60.,278.);
144 tpc->DefineSection(15,-64.7,60.,278.);
78134e48 145 //
8ad31ee5 146 tpc->DefineSection(16,-64.7,56.9,278.);
147 tpc->DefineSection(17,73.3,56.9,278.);
78134e48 148 //
8ad31ee5 149 tpc->DefineSection(18,73.3,60.1,278.);
150 tpc->DefineSection(19,74.0,60.1,278.);
4fb9bd37 151 //
c5d5037c 152 tpc->DefineSection(20,74.0,60.68,278.);// hs
153 tpc->DefineSection(21,253.6,65.38,278.);// hs
154 //
8ad31ee5 155 tpc->DefineSection(22,253.6,65.6,278.);
156 tpc->DefineSection(23,259.6,65.6,278.);
4fb9bd37 157 //
8ad31ee5 158 tpc->DefineSection(24,259.6,70.0,278.);
159 tpc->DefineSection(25,260.,70.0,278.);
4fb9bd37 160 //
8ad31ee5 161 tpc->DefineSection(26,260.,83.1,278.);
162 tpc->DefineSection(27,262.1,83.1,278.);
4fb9bd37 163 //
8ad31ee5 164 tpc->DefineSection(28,262.1,77.,278);
165 tpc->DefineSection(29,289.6,77.,278.);
166
c1637e41 167 //
168 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
169 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
170 //
171 // drift volume - sensitive volume, extended beyond the
172 // endcaps, because of the alignment
173 //
174 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
175 dvol->DefineSection(0,-260.,74.5,264.4);
176 dvol->DefineSection(1,-253.6,74.5,264.4);
177 //
178 dvol->DefineSection(2,-253.6,76.6774,258.);
179 dvol->DefineSection(3,253.6,76.6774,258.);
180 //
181 dvol->DefineSection(4,253.6,74.5,264.4);
182 dvol->DefineSection(5,260.,74.5,264.4);
183 //
f3d601a5 184 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-2");
c1637e41 185 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
186 //
187 v1->AddNode(v9,1);
188 //
189 // outer insulator
190 //
191 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
192 //
193 tpco->DefineSection(0,-256.6,264.8,278.);
194 tpco->DefineSection(1,-253.6,264.8,278.);
195 //
196 tpco->DefineSection(2,-253.6,258.,278.);
197 tpco->DefineSection(3,250.6,258.,278.);
198 //
199 tpco->DefineSection(4,250.6,258.,275.5);
200 tpco->DefineSection(5,253.6,258.,275.5);
201 //
202 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
203 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
204 //
205 // outer containment vessel
206 //
207 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
208 //
209 tocv->DefineSection(0,-256.6,264.8,278.);
210 tocv->DefineSection(1,-253.6,264.8,278.);
211 //
212 tocv->DefineSection(2,-253.6,274.8124,278.);
213 tocv->DefineSection(3,247.6,274.8124,278.);
214 //
215 tocv->DefineSection(4,247.6,270.4,278.);
216 tocv->DefineSection(5,250.6,270.4,278.);
217 //
218 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
219 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
220 //
221 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
222 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
223 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
224 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
225 //
226 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
227 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
228 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
229 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
230 //
231 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
232 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
233 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
234 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
c5d5037c 235 //
236 TGeoMedium *mhs = gGeoManager->GetMedium("TPC_Steel");
237 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
c1637e41 238 //-------------------------------------------------------
239 // Tpc Outer Field Cage
240 // daughters - composite (sandwich)
241 //-------------------------------------------------------
37831078 242
c1637e41 243 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
244 //
245 tofc->DefineSection(0,-253.6,258.,269.6);
246 tofc->DefineSection(1,-250.6,258.,269.6);
247 //
248 tofc->DefineSection(2,-250.6,258.,260.0676);
249 tofc->DefineSection(3,250.6,258.,260.0676);
250 //
251 tofc->DefineSection(4,250.6,258.,275.5);
252 tofc->DefineSection(5,253.6,258.,275.5);
253 //
254 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
255 //sandwich
256 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
257 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
258 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
259 //
260 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
261 //
262 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
263 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
264 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
265 //
266 // outer part - positioning
267 //
268 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
269 //
270 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
271 //
456cb019 272 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
c1637e41 273 //
274 v2->AddNode(v3,1); v2->AddNode(v4,1);
275 //
276 v1->AddNode(v2,1);
277 //-----------------------------------------------------------
37831078 278
37831078 279
37831078 280
37831078 281
37831078 282
37831078 283
c1637e41 284 //--------------------------------------------------------------------
285 // Tpc Inner INsulator (CO2)
286 // the cones, the central drum and the inner f.c. sandwich with a piece
287 // of the flane will be placed in the TPC
288 //--------------------------------------------------------------------
289 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
290 //
291 tpci->DefineSection(0,-253.6,68.4,76.6774);
292 tpci->DefineSection(1,-74.0,61.2,76.6774);
293 //
294 tpci->DefineSection(2,74.0,61.2,76.6774);
295 //
296 tpci->DefineSection(3,253.6,65.9,76.6774);
297 //
298 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
299 //
300 // now the inner field cage - only part of flanges (2 copies)
301 //
302 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
303 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
304 //
305 //---------------------------------------------------------
306 // Tpc Inner Containment vessel - Muon side
307 //---------------------------------------------------------
308 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
309 //
310 tcms->DefineSection(0,-259.1,68.1,74.2);
311 tcms->DefineSection(1,-253.6,68.1,74.2);
312 //
313 tcms->DefineSection(2,-253.6,68.1,68.4);
314 tcms->DefineSection(3,-74.0,60.9,61.2);
315 //
316 tcms->DefineSection(4,-74.0,60.1,61.2);
317 tcms->DefineSection(5,-73.3,60.1,61.2);
318 //
319 tcms->DefineSection(6,-73.3,56.9,61.2);
320 tcms->DefineSection(7,-73.0,56.9,61.2);
321 //
322 tcms->DefineSection(8,-73.0,56.9,58.8);
323 tcms->DefineSection(9,-71.3,56.9,58.8);
324 //
325 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
c5d5037c 326 //------------------------------------------------
327 // Heat screen muon side
328 //------------------------------------------------
329
330 TGeoCone *thsm = new TGeoCone(89.8,67.88,68.1,60.68,60.9);
331 TGeoCone *thsmw = new TGeoCone(89.8,67.94,68.04,60.74,60.84);
332 TGeoVolume *hvsm = new TGeoVolume("TPC_HSM",thsm,mhs); //steel
333 TGeoVolume *hvsmw = new TGeoVolume("TPC_HSMW",thsmw,m12); //water
334 // assembly heat screen muon
335 hvsm->AddNode(hvsmw,1);
37831078 336 //-----------------------------------------------
c1637e41 337 // inner containment vessel - shaft side
37831078 338 //-----------------------------------------------
c1637e41 339 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
340 //
341 tcss->DefineSection(0,71.3,56.9,58.8);
342 tcss->DefineSection(1,73.0,56.9,58.8);
343 //
344 tcss->DefineSection(2,73.0,56.9,61.2);
345 tcss->DefineSection(3,73.3,56.9,61.2);
346 //
347 tcss->DefineSection(4,73.3,60.1,61.2);
348 tcss->DefineSection(5,74.0,60.1,61.2);
349 //
350 tcss->DefineSection(6,74.0,60.9,61.2);
351 tcss->DefineSection(7,253.6,65.6,65.9);
352 //
353 tcss->DefineSection(8,253.6,65.6,74.2);
354 tcss->DefineSection(9,258.1,65.6,74.2);
355 //
356 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
c5d5037c 357 //-------------------------------------------------
358 // Heat screen shaft side
359 //--------------------------------------------------
360 TGeoCone *thss = new TGeoCone(89.8,60.68,60.9,65.38,65.6);
361 TGeoCone *thssw = new TGeoCone(89.8,60.74,60.84,65.44,65.54);
362 TGeoVolume *hvss = new TGeoVolume("TPC_HSS",thss,mhs); //steel
363 TGeoVolume *hvssw = new TGeoVolume("TPC_HSSW",thssw,m12); //water
364 //assembly heat screen shaft
365 hvss->AddNode(hvssw,1);
c1637e41 366 //-----------------------------------------------
367 // Inner field cage
368 // define 4 parts and make an assembly
369 //-----------------------------------------------
370 // part1 - Al - 2 copies
371 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
372 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
373 // sandwich - outermost parts - 2 copies
374 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
375 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
376 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
377 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
378 //
379 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
380 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
381 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
382 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
383 //
384 // middle parts - 2 copies
385 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
386 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
387 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
388 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
389 //
390 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
391 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
392 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
393 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
394 // central part - 1 copy
395 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
396 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
397 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
398 //
399 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
400 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
401 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
402 //
403 // inner part - positioning
404 //
405 // creating a sandwich
406 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
407 //
408 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
409 //
410 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
411 //
412 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
413 //
414 tv100->AddNode(tv10,1);
415 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
416 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
417 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
418 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
419 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
420 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
421 //
422 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
423 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
424 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
c5d5037c 425 v1->AddNode(hvsm,1,new TGeoTranslation(0.,0.,-163.8));
426 v1->AddNode(hvss,1,new TGeoTranslation(0.,0.,163.8));
c1637e41 427 v9->AddNode(tv100,1);
428 //
429 // central drum
430 //
431 // flange + sandwich
432 //
433 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
434 cfl->DefineSection(0,-71.1,59.7,61.2);
435 cfl->DefineSection(1,-68.6,59.7,61.2);
436 //
437 cfl->DefineSection(2,-68.6,60.6324,61.2);
438 cfl->DefineSection(3,68.6,60.6324,61.2);
439 //
440 cfl->DefineSection(4,68.6,59.7,61.2);
441 cfl->DefineSection(5,71.1,59.7,61.2);
442 //
443 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
444 // sandwich
445 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
446 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
447 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
448 //
449 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
450 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
451 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
452 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
453 //
454 // seals for central drum 2 copies
455 //
456 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
457 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
458 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
78134e48 459 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
460 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
c1637e41 461 //
462 // seal collars
463 TGeoPcon *se = new TGeoPcon(0.,360.,6);
464 se->DefineSection(0,-72.8,59.7,61.2);
465 se->DefineSection(1,-72.3,59.7,61.2);
466 //
467 se->DefineSection(2,-72.3,58.85,61.2);
468 se->DefineSection(3,-71.6,58.85,61.2);
469 //
470 se->DefineSection(4,-71.6,59.7,61.2);
471 se->DefineSection(5,-71.3,59.7,61.2);
472 //
473 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
474 //
475 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
476 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
477 //
478 // define reflection matrix
479 //
4fa47888 480 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
c1637e41 481 //
482 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
483 //
a1ec4d07 484 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
485 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
c1637e41 486 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
487 //
488 // central membrane - 2 rings and a mylar membrane - assembly
489 //
490 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
491 TGeoTube *oh = new TGeoTube(250.,256.,.5);
492 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
493 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
494 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
495 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
496 //
497 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
498 cm->AddNode(ihv,1);
499 cm->AddNode(ohv,1);
500 cm->AddNode(memv,1);
501 v9->AddNode(cm,1);
502 //
503 // end caps - they are make as an assembly of single segments
504 // containing both readout chambers
505 //
d899e254 506 Double_t openingAngle = 10.*TMath::DegToRad();
c1637e41 507 Double_t thick=1.5; // rib
d899e254 508 Double_t shift = thick/TMath::Sin(openingAngle);
c1637e41 509 //
d899e254 510 Double_t lowEdge = 86.3; // hole in the wheel
511 Double_t upEdge = 240.4; // hole in the wheel
c1637e41 512 //
513 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
514 //
515 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
516 //
d899e254 517 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
518 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
c1637e41 519 //
d899e254 520 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
521 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
c1637e41 522 //
d899e254 523 Double_t ys = shift*TMath::Sin(openingAngle);
524 Double_t xs = shift*TMath::Cos(openingAngle);
c1637e41 525 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
526 tr->RegisterYourself();
527 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
528 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
529 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
530 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
531 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
532 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
533 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
534 //
535 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
536 //
537 // readout chambers
538 //
539 // IROC first
540 //
541 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
542 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
543 // empty space
544 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
545 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
546 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
547 //bars
548 Double_t tga = (19.8328-12.3742)/39.3;
549 Double_t xmin,xmax;
550 xmin = 9.55*tga+12.3742;
551 xmax = 9.95*tga+12.3742;
552 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
553 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
554 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
555 xmin=19.4*tga+12.3742;
556 xmax=19.9*tga+12.3742;
557 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
558 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
559 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
560 xmin=29.35*tga+12.3742;
561 xmax=29.75*tga+12.3742;
562 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
563 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
564 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
565 //
566 // holes for connectors
567 //
568 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
569 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
d9e80aca 570 TString fileName(gSystem->Getenv("ALICE_ROOT"));
571 fileName += "/TPC/conn_iroc.dat";
c1637e41 572 ifstream in;
d9e80aca 573 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 574 for(Int_t i =0;i<86;i++){
456cb019 575 Double_t y = 3.99;
c1637e41 576 Double_t x,z,ang;
577 in>>x>>z>>ang;
456cb019 578 z-=26.5;
c1637e41 579 TGeoRotation *rrr = new TGeoRotation();
580 rrr->RotateY(ang);
581 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
582 ibdv->AddNode(connv,i+1,trans);
583 }
584 in.close();
585 // "cap"
586 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
587 // "hole"
588 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
589 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
590 tr1->RegisterYourself();
591 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
592 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
593 //
594 // pad plane and wire fixations
595 //
596 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
597 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
598 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
599 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
600 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
601 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
602 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
603 //
604 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
605 //
606 iroc->AddNode(ibdv,1);
607 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
608 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
609 tga =(23.3521-14.5974)/49.65;
610 Double_t xx = 24.825*tga+14.5974-0.6;
611 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
612 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
613 //
614 // OROC
615 //
616 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
617 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
618 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
619 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
620 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
621 //horizontal bars
622 tga=(38.5084-20.2938)/99.3;
623 xmin=tga*10.2+20.2938;
624 xmax=tga*10.6+20.2938;
625 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
626 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
627 //
628 xmin=22.55*tga+20.2938;
629 xmax=24.15*tga+20.2938;
630 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
631 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
632 //
633 xmin=36.1*tga+20.2938;
634 xmax=36.5*tga+20.2938;
635 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
636 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
637 //
638 xmin=49.0*tga+20.2938;
639 xmax=50.6*tga+20.2938;
640 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
641 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
642 //
643 xmin=63.6*tga+20.2938;
644 xmax=64.0*tga+20.2938;
645 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
646 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
647 //
648 xmin=75.5*tga+20.2938;
649 xmax=77.15*tga+20.2938;
650 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
651 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
652 //
653 xmin=88.7*tga+20.2938;
654 xmax=89.1*tga+20.2938;
655 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
656 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
657 //
658 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
659 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
660 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
661 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
662 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
663 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
664 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
665 // vertical bars
666 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
667 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
668 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
669 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
670 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
671 //
672 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
673 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
674 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
675 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
676 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
677 //
678 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
679 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
680 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
681 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
682 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
683 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
684 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
685 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
686 //
687 // holes for connectors
688 //
d9e80aca 689 fileName = gSystem->Getenv("ALICE_ROOT");
690 fileName += "/TPC/conn_oroc.dat";
691 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 692 for(Int_t i =0;i<78;i++){
693 Double_t y =3.89;
694 Double_t x,z,ang;
695 Double_t x1,z1,x2,z2;
696 in>>x>>z>>ang;
697 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
698 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
699 //
700 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
701 //
702 TGeoRotation *rr = new TGeoRotation();
703 rr->RotateY(ang);
704 z1-=54.95;
705 z2-=54.95;
706 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
707 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
708 obdv->AddNode(connv,i+1,trans1);
709 obdv->AddNode(connv,i+79,trans2);
710 }
711 in.close();
712 // cap
713 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
714 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
715 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
716 tr5->RegisterYourself();
717 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
718 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
719 //
720 // pad plane and wire fixations
721 //
722 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
723 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
724 //
725 tga=(43.5239-23.3874)/114.2;
726 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
727 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
728 xx = 57.1*tga+23.3874-0.7;
729 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
730 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
731 //
732 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
733 //
734 oroc->AddNode(obdv,1);
735 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
736 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
737 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
738 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
739 //
740 // now iroc and oroc are placed into a sector...
741 //
a1ec4d07 742 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
743 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
c1637e41 744 TGeoRotation rot1("rot1",90.,90.,0.);
745 TGeoRotation rot2("rot2");
746 rot2.RotateY(10.);
747 TGeoRotation *rot = new TGeoRotation("rot");
748 *rot=rot1*rot2;
749 //
750 Double_t x0,y0;
d899e254 751 x0=110.2*TMath::Cos(openingAngle);
752 y0=110.2*TMath::Sin(openingAngle);
20527578 753 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
754 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
d899e254 755 x0=188.45*TMath::Cos(openingAngle);
756 y0=188.45*TMath::Sin(openingAngle);
20527578 757 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
758 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
c1637e41 759 //
a1ec4d07 760 // A-side
c1637e41 761 //
a1ec4d07 762 secta->AddNode(ch,1);
763 secta->AddNode(iroc,1,combi1a);
764 secta->AddNode(oroc,1,combi2a);
c1637e41 765 //
a1ec4d07 766 // C-side
767 //
768 sectc->AddNode(ch,1);
769 sectc->AddNode(iroc,1,combi1c);
770 sectc->AddNode(oroc,1,combi2c);
771 //
772 // now I try to make wheels...
773 //
774 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
775 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
c1637e41 776 //
777 for(Int_t i =0;i<18;i++){
778 Double_t phi = (20.*i);
779 TGeoRotation *r = new TGeoRotation();
780 r->RotateZ(phi);
a1ec4d07 781 wheela->AddNode(secta,i+1,r);
782 wheelc->AddNode(sectc,i+1,r);
c1637e41 783
784 }
785 // wheels in the drift volume!
c1637e41 786 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
a1ec4d07 787 v9->AddNode(wheela,1,combi3);
788 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
37831078 789
c1637e41 790 //_____________________________________________________________
791 // service support wheel
792 //_____________________________________________________________
793 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
794 sw->DefineSection(0,-4.,80.5,251.75);
795 sw->DefineSection(1,4.,80.5,251.75);
796 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
797 //
798 thick=1.;
d899e254 799 shift = thick/TMath::Sin(openingAngle);
c1637e41 800 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
801 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
802 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
803 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
804 //
74518339 805 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
806 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
807 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
808 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
809 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
810 //
811 shv->AddNode(elv,1);
812 //
d899e254 813 ys = shift*TMath::Sin(openingAngle);
814 xs = shift*TMath::Cos(openingAngle);
c1637e41 815 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
816 // cover
817 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
818 co->DefineSection(0,-0.5,77.,255.25);
819 co->DefineSection(1,0.5,77.,255.25);
820 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
821 // hole in a cover
822 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
d899e254 823 shift=4./TMath::Sin(openingAngle);
c1637e41 824 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
825 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
826 //
827 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
828 //
d899e254 829 ys = shift*TMath::Sin(openingAngle);
830 xs = shift*TMath::Cos(openingAngle);
c1637e41 831 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
832 //
833 // Sector as an Assembly
834 //
835 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
836 swhs->AddNode(swv,1);
837 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
838 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
839 //
840 // SSW as an Assembly of sectors
841 //
842 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
843 for(Int_t i =0;i<18;i++){
844 Double_t phi = (20.*i);
845 TGeoRotation *r = new TGeoRotation();
846 r->RotateZ(phi);
847 swheel->AddNode(swhs,i+1,r);
848 }
849 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
850 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
851 //
37831078 852 //----------------------------------------------------------
853 // TPc Support Rods - MAKROLON
854 //----------------------------------------------------------
c1637e41 855 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
856 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
78134e48 857 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
858 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");
c1637e41 859 // upper and lower rods differ in length!
860 Double_t *upar;
861 upar=NULL;
862 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
863 upar=new Double_t [3];
864 upar[0]=1.8;
865 upar[1]=2.2;
866
867 //
868 //HV rods - makrolon + 0.58cm (diameter) Cu
ae4806ca 869 TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
c1637e41 870 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
871 //
872 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
873 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
874 hvrv->AddNode(hvcv,1);
78134e48 875 //
876 // resistor rods
877 //
878 TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner
879 TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer
880 TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
881 TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
882 //
883 TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
884 TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);
885 TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
886 TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);
887 //
888 // ceramic rod with water
889 //
890 criv->AddNode(cwiv,1);
891 crov->AddNode(cwov,1);
892 //
893 TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner
894 TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer
895 //
896 // peek rod
897 //
898 TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
899 TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12);
900 //
901 // resistor rods assembly
902 //
be53328e 903 TGeoRotation *rotr = new TGeoRotation("rotr");
904 rotr->RotateZ(-21.);
78134e48 905 //
906 TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
907 TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
908 //
909 TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
910 TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);
911 //
a3d2be59 912 TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
913 TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
914 rrin->AddNode(rriv,1);
915 rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
916 rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.));
917 rrin->AddNode(priv,1);
918 //
919 rrou->AddNode(rrov,1);
920 rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
921 rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.));
922 rrou->AddNode(prov,1);
7281dc07 923 for(Int_t i=0;i<18;i++){
c1637e41 924 Double_t angle,x,y;
925 Double_t z,r;
926 angle=TMath::DegToRad()*20.*(Double_t)i;
927 r=81.5;
928 x=r * TMath::Cos(angle);
929 y=r * TMath::Sin(angle);
930 upar[2]=126.64; //lower
931 z= 126.96;
78134e48 932 //
933 if(i==3){
be53328e 934 v9->AddNode(rrin,1,new TGeoCombiTrans(x,y,z,rotr)); //A
935 v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
78134e48 936 }
937 else {
938 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
939 gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
c1637e41 940 }
78134e48 941
942
943 //
c1637e41 944 r=254.25;
945 x=r * TMath::Cos(angle);
946 y=r * TMath::Sin(angle);
947 upar[2]=126.54; //upper
948 z=127.06;
78134e48 949 if(i==15){
5042ab7d 950 //v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
951 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,127.14));//A-side only
78134e48 952 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
953 }
954 else if(i==11){
be53328e 955 v9->AddNode(rrou,1,new TGeoCombiTrans(x,y,z,rotr)); //A
956 v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
78134e48 957 }
958 else{
959 //
960 gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
961 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
962 }
37831078 963 }
964
bde68ab0 965 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
966 alice->AddNode(v1,1);
967
37831078 968
969
970} // end of function
37831078 971
c5d5037c 972
37831078 973
974//_____________________________________________________________________________
975void AliTPCv3::CreateMaterials()
976{
977 //
978 // Define materials for version 2 of the Time Projection Chamber
979 //
980
981
982 //
983 AliTPC::CreateMaterials();
984}
985
986//_____________________________________________________________________________
987void AliTPCv3::Init()
988{
989 //
990 // Initialises version 3 of the TPC after that it has been built
991 //
8d888a91 992 //Int_t *idtmed = fIdtmed->GetArray();
4b0fdcad 993
994 AliTPC::Init();
995
c1637e41 996 fIdSens=gMC->VolId("TPC_Drift"); // drift gas as a sensitive volume
4b0fdcad 997
d9888f70 998 gMC->SetMaxNStep(-30000); // max. number of steps increased
4b0fdcad 999
098dfc1a 1000 // specific energy loss is now set in galice.cuts
4b0fdcad 1001
13a8c8d7 1002 printf("%s: *** TPC version 3 initialized***\n",ClassName());
1003
1004 printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
1005
1006 // printf("*** TPC version 3 initialized ***\n");
1007 // printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
4b0fdcad 1008
1009 //
1010
1011}
1012
1013//_____________________________________________________________________________
1014void AliTPCv3::StepManager()
1015{
1016 //
1017 // Called for every step in the Time Projection Chamber
1018 //
1019
1020 //
1021 // parameters used for the energy loss calculations
1022 //
73042f01 1023 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1024 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1025 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
4b0fdcad 1026
1027
73042f01 1028 const Float_t kbig = 1.e10;
4b0fdcad 1029
1030 Int_t id,copy;
1031 TLorentzVector pos;
e61fd20d 1032 Float_t hits[5];
4b0fdcad 1033 Int_t vol[2];
4b0fdcad 1034
1035 vol[1]=0;
1036 vol[0]=0;
1037
1038 //
1039
73042f01 1040 gMC->SetMaxStep(kbig);
4b0fdcad 1041
1042 if(!gMC->IsTrackAlive()) return; // particle has disappeared
1043
1044 Float_t charge = gMC->TrackCharge();
1045
1046 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1047
1048
1049 id=gMC->CurrentVolID(copy);
c1637e41 1050
4b0fdcad 1051
37831078 1052 if (id != fIdSens) return;
4b0fdcad 1053
1054 //
1055 // charged particle is in the sensitive volume
1056 //
1057
1058 if(gMC->TrackStep() > 0) {
1059
1060
73042f01 1061 Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
4b0fdcad 1062 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1063
1064 gMC->TrackPosition(pos);
1065 hits[0]=pos[0];
1066 hits[1]=pos[1];
1067 hits[2]=pos[2];
1068
e61fd20d 1069 // Get also the track time for pileup simulation
1070 hits[4]=gMC->TrackTime();
1071
4b0fdcad 1072 //
1073 // check the selected side of the TPC
1074 //
1075
1076 if(fSide && fSide*hits[2]<=0.) return;
1077
1078 hits[3]=(Float_t)nel;
1079
1080 // Add this hit
1081
5d12ce38 1082 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); //MI change
4b0fdcad 1083
1084 }
1085
1086 // Stemax calculation for the next step
1087
1088 Float_t pp;
1089 TLorentzVector mom;
1090 gMC->TrackMomentum(mom);
1091 Float_t ptot=mom.Rho();
73042f01 1092 Float_t betaGamma = ptot/gMC->TrackMass();
4b0fdcad 1093
69e40cce 1094 Int_t pid=gMC->TrackPid();
cc80f89e 1095 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
4b0fdcad 1096 {
73042f01 1097 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
4b0fdcad 1098 }
1099 else
1100 {
7b562732 1101 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3);
b40afa5e 1102 pp=kprim*AliMathBase::BetheBlochAleph(betaGamma);
4b0fdcad 1103 if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1104 }
1105
b9d0a01d 1106 Double_t rnd = gMC->GetRandom()->Rndm();
4b0fdcad 1107
1108 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1109
1110}