1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
19 ///////////////////////////////////////////////////////////////////////////////
21 // Time Projection Chamber version 0 -- "coarse" TPC //
25 <img src="picts/AliTPCv0Class.gif">
30 ///////////////////////////////////////////////////////////////////////////////
32 #include <Riostream.h>
34 #include <TGeometry.h>
38 #include <TVirtualMC.h>
44 #include "AliTPCDigitsArray.h"
45 #include "AliTPCParamSR.h"
47 #include "TGeoManager.h"
48 #include "TGeoVolume.h"
53 #include "TGeoCompositeShape.h"
57 //_____________________________________________________________________________
58 AliTPCv0::AliTPCv0(const char *name, const char *title)
62 // Standard creator for TPC version 0
67 fTPCParam->Write(fTPCParam->GetTitle());
70 //_____________________________________________________________________________
71 void AliTPCv0::CreateGeometry()
75 // Creation of the TPC version 0, i.e. no sensitive volumes,
76 // only the material distribution
80 <img src="picts/AliTPC.gif">
85 <img src="picts/AliTPCv0Tree.gif">
89 //----------------------------------------------------------
90 // This geometry is written using TGeo class
91 // Firstly the shapes are defined, and only then the volumes
92 // What is recognized by the MC are volumes
93 //----------------------------------------------------------
95 // tpc - this will be the mother volume
99 // here I define a volume TPC
100 // retrive the medium name with "TPC_" as a leading string
102 TGeoPcon *tpc = new TGeoPcon(0.,360.,20); //20 sections
104 tpc->DefineSection(0,-291.,77.,278.);
105 tpc->DefineSection(1,-270,77.,278.);
107 tpc->DefineSection(2,-270.,77.,278.);
108 tpc->DefineSection(3,-259.6,70.,278.);
110 tpc->DefineSection(4,-259.6,68.1,278.);
111 tpc->DefineSection(5,-253.6,68.1,278.);
113 tpc->DefineSection(6,-253.6,68.,278.);
114 tpc->DefineSection(7,-74.0,60.8,278.);
116 tpc->DefineSection(8,-74.0,60.1,278.);
117 tpc->DefineSection(9,-73.3,60.1,278.);
119 tpc->DefineSection(10,-73.3,56.9,278.);
120 tpc->DefineSection(11,73.3,56.9,278.);
122 tpc->DefineSection(12,73.3,60.1,278.);
123 tpc->DefineSection(13,74.0,60.1,278.);
125 tpc->DefineSection(14,74.0,60.8,278.);
126 tpc->DefineSection(15,253.6,65.5,278.);
128 tpc->DefineSection(16,253.6,65.6,278.);
129 tpc->DefineSection(17,259.6,65.6,278.);
131 tpc->DefineSection(18,259.6,70.0,278.);
132 tpc->DefineSection(19,291.,77.,278.);
134 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
135 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
137 // drift volume - sensitive volume, extended beyond the
138 // endcaps, because of the alignment
140 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
141 dvol->DefineSection(0,-260.,74.5,264.4);
142 dvol->DefineSection(1,-253.6,74.5,264.4);
144 dvol->DefineSection(2,-253.6,76.6774,258.);
145 dvol->DefineSection(3,253.6,76.6774,258.);
147 dvol->DefineSection(4,253.6,74.5,264.4);
148 dvol->DefineSection(5,260.,74.5,264.4);
150 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-1");
151 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
157 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
159 tpco->DefineSection(0,-256.6,264.8,278.);
160 tpco->DefineSection(1,-253.6,264.8,278.);
162 tpco->DefineSection(2,-253.6,258.,278.);
163 tpco->DefineSection(3,250.6,258.,278.);
165 tpco->DefineSection(4,250.6,258.,275.5);
166 tpco->DefineSection(5,253.6,258.,275.5);
168 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
169 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
171 // outer containment vessel
173 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
175 tocv->DefineSection(0,-256.6,264.8,278.);
176 tocv->DefineSection(1,-253.6,264.8,278.);
178 tocv->DefineSection(2,-253.6,274.8124,278.);
179 tocv->DefineSection(3,247.6,274.8124,278.);
181 tocv->DefineSection(4,247.6,270.4,278.);
182 tocv->DefineSection(5,250.6,270.4,278.);
184 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
185 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
187 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
188 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
189 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
190 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
192 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
193 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
194 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
195 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
197 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
198 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
199 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
200 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
201 //-------------------------------------------------------
202 // Tpc Outer Field Cage
203 // daughters - composite (sandwich)
204 //-------------------------------------------------------
206 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
208 tofc->DefineSection(0,-253.6,258.,269.6);
209 tofc->DefineSection(1,-250.6,258.,269.6);
211 tofc->DefineSection(2,-250.6,258.,260.0676);
212 tofc->DefineSection(3,250.6,258.,260.0676);
214 tofc->DefineSection(4,250.6,258.,275.5);
215 tofc->DefineSection(5,253.6,258.,275.5);
217 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
219 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
220 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
221 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
223 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
225 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
226 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
227 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
229 // outer part - positioning
231 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
233 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
235 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
237 v2->AddNode(v3,1); v2->AddNode(v4,1);
240 //-----------------------------------------------------------
241 //--------------------------------------------------------------------
242 // Tpc Inner INsulator (CO2)
243 // the cones, the central drum and the inner f.c. sandwich with a piece
244 // of the flane will be placed in the TPC
245 //--------------------------------------------------------------------
246 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
248 tpci->DefineSection(0,-253.6,68.4,76.6774);
249 tpci->DefineSection(1,-74.0,61.2,76.6774);
251 tpci->DefineSection(2,74.0,61.2,76.6774);
253 tpci->DefineSection(3,253.6,65.9,76.6774);
255 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
257 // now the inner field cage - only part of flanges (2 copies)
259 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
260 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
262 //---------------------------------------------------------
263 // Tpc Inner Containment vessel - Muon side
264 //---------------------------------------------------------
265 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
267 tcms->DefineSection(0,-259.1,68.1,74.2);
268 tcms->DefineSection(1,-253.6,68.1,74.2);
270 tcms->DefineSection(2,-253.6,68.1,68.4);
271 tcms->DefineSection(3,-74.0,60.9,61.2);
273 tcms->DefineSection(4,-74.0,60.1,61.2);
274 tcms->DefineSection(5,-73.3,60.1,61.2);
276 tcms->DefineSection(6,-73.3,56.9,61.2);
277 tcms->DefineSection(7,-73.0,56.9,61.2);
279 tcms->DefineSection(8,-73.0,56.9,58.8);
280 tcms->DefineSection(9,-71.3,56.9,58.8);
282 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
283 //-----------------------------------------------
284 // inner containment vessel - shaft side
285 //-----------------------------------------------
286 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
288 tcss->DefineSection(0,71.3,56.9,58.8);
289 tcss->DefineSection(1,73.0,56.9,58.8);
291 tcss->DefineSection(2,73.0,56.9,61.2);
292 tcss->DefineSection(3,73.3,56.9,61.2);
294 tcss->DefineSection(4,73.3,60.1,61.2);
295 tcss->DefineSection(5,74.0,60.1,61.2);
297 tcss->DefineSection(6,74.0,60.9,61.2);
298 tcss->DefineSection(7,253.6,65.6,65.9);
300 tcss->DefineSection(8,253.6,65.6,74.2);
301 tcss->DefineSection(9,258.1,65.6,74.2);
303 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
304 //-----------------------------------------------
306 // define 4 parts and make an assembly
307 //-----------------------------------------------
308 // part1 - Al - 2 copies
309 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
310 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
311 // sandwich - outermost parts - 2 copies
312 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
313 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
314 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
315 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
317 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
318 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
319 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
320 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
322 // middle parts - 2 copies
323 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
324 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
325 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
326 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
328 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
329 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
330 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
331 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
332 // central part - 1 copy
333 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
334 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
335 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
337 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
338 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
339 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
341 // inner part - positioning
343 // creating a sandwich
344 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
346 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
348 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
350 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
352 tv100->AddNode(tv10,1);
353 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
354 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
355 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
356 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
357 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
358 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
360 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
361 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
362 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
363 v9->AddNode(tv100,1);
369 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
370 cfl->DefineSection(0,-71.1,59.7,61.2);
371 cfl->DefineSection(1,-68.6,59.7,61.2);
373 cfl->DefineSection(2,-68.6,60.6324,61.2);
374 cfl->DefineSection(3,68.6,60.6324,61.2);
376 cfl->DefineSection(4,68.6,59.7,61.2);
377 cfl->DefineSection(5,71.1,59.7,61.2);
379 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
381 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
382 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
383 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
385 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
386 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
387 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
388 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
390 // seals for central drum 2 copies
392 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
393 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
394 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
395 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
396 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
399 TGeoPcon *se = new TGeoPcon(0.,360.,6);
400 se->DefineSection(0,-72.8,59.7,61.2);
401 se->DefineSection(1,-72.3,59.7,61.2);
403 se->DefineSection(2,-72.3,58.85,61.2);
404 se->DefineSection(3,-71.6,58.85,61.2);
406 se->DefineSection(4,-71.6,59.7,61.2);
407 se->DefineSection(5,-71.3,59.7,61.2);
409 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
411 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
412 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
414 // define reflection matrix
416 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
418 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
420 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
421 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
422 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
424 // central membrane - 2 rings and a mylar membrane - assembly
426 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
427 TGeoTube *oh = new TGeoTube(250.,256.,.5);
428 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
429 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
430 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
431 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
433 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
439 // end caps - they are make as an assembly of single segments
440 // containing both readout chambers
442 Double_t openingAngle = 10.*TMath::DegToRad();
443 Double_t thick=1.5; // rib
444 Double_t shift = thick/TMath::Sin(openingAngle);
446 Double_t lowEdge = 86.3; // hole in the wheel
447 Double_t upEdge = 240.4; // hole in the wheel
449 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
451 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
453 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
454 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
456 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
457 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
459 Double_t ys = shift*TMath::Sin(openingAngle);
460 Double_t xs = shift*TMath::Cos(openingAngle);
461 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
462 tr->RegisterYourself();
463 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
464 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
465 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
466 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
467 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
468 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
469 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
471 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
477 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
478 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
480 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
481 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
482 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
484 Double_t tga = (19.8328-12.3742)/39.3;
486 xmin = 9.55*tga+12.3742;
487 xmax = 9.95*tga+12.3742;
488 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
489 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
490 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
491 xmin=19.4*tga+12.3742;
492 xmax=19.9*tga+12.3742;
493 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
494 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
495 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
496 xmin=29.35*tga+12.3742;
497 xmax=29.75*tga+12.3742;
498 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
499 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
500 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
502 // holes for connectors
504 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
505 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
506 TString fileName(gSystem->Getenv("ALICE_ROOT"));
507 fileName += "/TPC/conn_iroc.dat";
509 in.open(fileName.Data(), ios_base::in); // asci file
510 for(Int_t i =0;i<86;i++){
515 TGeoRotation *rrr = new TGeoRotation();
517 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
518 ibdv->AddNode(connv,i+1,trans);
522 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
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);
530 // pad plane and wire fixations
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);
540 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
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));
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.));
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);
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);
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);
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);
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);
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);
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);
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));
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);
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);
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));
623 // holes for connectors
625 fileName = gSystem->Getenv("ALICE_ROOT");
626 fileName += "/TPC/conn_oroc.dat";
627 in.open(fileName.Data(), ios_base::in); // asci file
628 for(Int_t i =0;i<78;i++){
631 Double_t x1,z1,x2,z2;
633 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
634 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
636 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
638 TGeoRotation *rr = new TGeoRotation();
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);
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);
656 // pad plane and wire fixations
658 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
659 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
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);
668 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
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));
676 // now iroc and oroc are placed into a sector...
678 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
679 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
682 TGeoRotation rot1("rot1",90.,90.,0.);
683 TGeoRotation rot2("rot2");
685 TGeoRotation *rot = new TGeoRotation("rot");
689 x0=110.2*TMath::Cos(openingAngle);
690 y0=110.2*TMath::Sin(openingAngle);
691 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
692 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
693 x0=188.45*TMath::Cos(openingAngle);
694 y0=188.45*TMath::Sin(openingAngle);
695 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
696 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
700 secta->AddNode(ch,1);
701 secta->AddNode(iroc,1,combi1a);
702 secta->AddNode(oroc,1,combi2a);
706 sectc->AddNode(ch,1);
707 sectc->AddNode(iroc,1,combi1c);
708 sectc->AddNode(oroc,1,combi2c);
710 // now I try to make wheels...
712 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
713 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
715 for(Int_t i =0;i<18;i++){
716 Double_t phi = (20.*i);
717 TGeoRotation *r = new TGeoRotation();
719 wheela->AddNode(secta,i+1,r);
720 wheelc->AddNode(sectc,i+1,r);
722 // wheels in the drift volume!
723 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
724 v9->AddNode(wheela,1,combi3);
725 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
726 //_____________________________________________________________
727 // service support wheel
728 //_____________________________________________________________
729 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
730 sw->DefineSection(0,-4.,80.5,251.75);
731 sw->DefineSection(1,4.,80.5,251.75);
732 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
735 shift = thick/TMath::Sin(openingAngle);
736 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
737 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
738 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
739 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
741 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
742 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
743 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
744 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
745 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
750 ys = shift*TMath::Sin(openingAngle);
751 xs = shift*TMath::Cos(openingAngle);
752 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
754 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
755 co->DefineSection(0,-0.5,77.,255.25);
756 co->DefineSection(1,0.5,77.,255.25);
757 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
759 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
760 shift=4./TMath::Sin(openingAngle);
761 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
762 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
764 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
766 ys = shift*TMath::Sin(openingAngle);
767 xs = shift*TMath::Cos(openingAngle);
768 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
770 // Sector as an Assembly
772 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
773 swhs->AddNode(swv,1);
774 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
775 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
777 // SSW as an Assembly of sectors
779 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
780 for(Int_t i =0;i<18;i++){
781 Double_t phi = (20.*i);
782 TGeoRotation *r = new TGeoRotation();
784 swheel->AddNode(swhs,i+1,r);
786 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
787 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
789 //----------------------------------------------------------
790 // TPc Support Rods - MAKROLON
791 //----------------------------------------------------------
792 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
793 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
794 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
795 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");
796 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
797 // upper and lower rods differ in length!
800 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
801 upar=new Double_t [3];
806 //HV rods - makrolon + 0.58cm (diameter) Cu
807 TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
808 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
810 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
811 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
812 hvrv->AddNode(hvcv,1);
816 TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner
817 TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer
818 TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
819 TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
821 TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
822 TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);
823 TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
824 TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);
826 // ceramic rod with water
828 criv->AddNode(cwiv,1);
829 crov->AddNode(cwov,1);
831 TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner
832 TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer
836 TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
837 TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12);
839 // resistor rods assembly
841 TGeoRotation *rotr = new TGeoRotation("rotr");
843 TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
844 TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
846 TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
847 TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);
849 TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
850 TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
851 rrin->AddNode(rriv,1);
852 rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
853 rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.));
854 rrin->AddNode(priv,1);
856 rrou->AddNode(rrov,1);
857 rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
858 rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.));
859 rrou->AddNode(prov,1);
860 for(Int_t i=0;i<18;i++){
863 angle=TMath::DegToRad()*20.*(Double_t)i;
865 x=r * TMath::Cos(angle);
866 y=r * TMath::Sin(angle);
867 upar[2]=126.64; //lower
870 v9->AddNode(rrin,1,new TGeoCombiTrans(x,y,z,rotr)); //A
871 v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
874 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
875 gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
881 x=r * TMath::Cos(angle);
882 y=r * TMath::Sin(angle);
883 upar[2]=126.54; //upper
887 //v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
888 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,127.14));//A-side only
889 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
892 v9->AddNode(rrou,1,new TGeoCombiTrans(x,y,z,rotr)); //A
893 v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
897 gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
898 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
903 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
904 alice->AddNode(v1,1);
910 //_____________________________________________________________________________
911 void AliTPCv0::CreateMaterials()
914 // Define materials for the TPC
916 AliTPC::CreateMaterials();
919 //_____________________________________________________________________________
920 void AliTPCv0::DrawDetector()
923 // Draw a shaded view of the Time Projection Chamber version 0
926 // Set everything unseen
927 gMC->Gsatt("*", "seen", -1);
929 // Set ALIC mother transparent
930 gMC->Gsatt("ALIC","SEEN",0);
932 // Set the volumes visible
933 gMC->Gsatt("TPC ","SEEN",0);
934 gMC->Gsatt("TOIN","SEEN",1);
935 gMC->Gsatt("TOIN","COLO",7);
936 gMC->Gsatt("TOCV","SEEN",1);
937 gMC->Gsatt("TOCV","COLO",4);
938 gMC->Gsatt("TSA1","SEEN",0);
939 gMC->Gsatt("TSA2","SEEN",0);
940 gMC->Gsatt("TSA3","SEEN",0);
941 gMC->Gsatt("TSA4","SEEN",0);
942 gMC->Gsatt("TSA5","SEEN",0);
943 gMC->Gsatt("TOFC","SEEN",1);
944 gMC->Gsatt("TOFC","COLO",4);
945 gMC->Gsatt("TSA6","SEEN",0);
946 gMC->Gsatt("TSA7","SEEN",0);
947 gMC->Gsatt("TSA8","SEEN",0);
948 gMC->Gsatt("TIIN","SEEN",1);
949 gMC->Gsatt("TIIN","COLO",7);
950 gMC->Gsatt("TII1","SEEN",0);
951 gMC->Gsatt("TIFC","SEEN",1);
952 gMC->Gsatt("TIFC","COLO",4);
953 gMC->Gsatt("TSA9","SEEN",0);
954 gMC->Gsatt("TS10","SEEN",0);
955 gMC->Gsatt("TS11","SEEN",0);
956 gMC->Gsatt("TS12","SEEN",0);
957 gMC->Gsatt("TS13","SEEN",0);
958 gMC->Gsatt("TS14","SEEN",0);
959 gMC->Gsatt("TICC","SEEN",0);
960 gMC->Gsatt("TICM","SEEN",0);
961 gMC->Gsatt("TS15","SEEN",0);
962 gMC->Gsatt("TS16","SEEN",0);
963 gMC->Gsatt("TS17","SEEN",0);
964 gMC->Gsatt("TS18","SEEN",0);
965 gMC->Gsatt("TS19","SEEN",0);
966 gMC->Gsatt("TPJ1","SEEN",0);
967 gMC->Gsatt("TPJ2","SEEN",0);
968 gMC->Gsatt("TICS","SEEN",0);
969 gMC->Gsatt("TDGN","SEEN",0);
970 gMC->Gsatt("TIRC","SEEN",0);
971 gMC->Gsatt("TIC1","SEEN",1);
972 gMC->Gsatt("TIPP","SEEN",0);
973 gMC->Gsatt("TIC3","SEEN",0);
974 gMC->Gsatt("TRCE","SEEN",0);
975 gMC->Gsatt("TPSC","SEEN",0);
976 gMC->Gsatt("TPCC","SEEN",0);
977 gMC->Gsatt("TORC","SEEN",0);
978 gMC->Gsatt("TOPP","SEEN",0);
979 gMC->Gsatt("TOC3","SEEN",0);
980 gMC->Gsatt("TOC1","SEEN",1);
981 gMC->Gsatt("TSSW","SEEN",1);
982 gMC->Gsatt("TSWC","SEEN",1);
983 gMC->Gsatt("TSSW","COLO",3);
984 gMC->Gsatt("TSWC","COLO",3);
985 gMC->Gsatt("TSCE","COLO",6);
986 gMC->Gsatt("TSCE","SEEN",1);
987 gMC->Gsatt("TWES","SEEN",0);
988 gMC->Gsatt("TSWB","SEEN",0);
989 gMC->Gsatt("TPEL","SEEN",0);
990 gMC->Gsatt("TPMW","SEEN",1);
991 gMC->Gsatt("TESR","SEEN",1);
992 gMC->Gsatt("TPMW","COLO",12);
993 gMC->Gsatt("TIC1","COLO",5);
994 gMC->Gsatt("TOC1","COLO",5);
995 gMC->Gsatt("TESB","SEEN",0);
996 gMC->Gsatt("THVM","SEEN",1);
997 gMC->Gsatt("THVM","COLO",11);
998 gMC->Gsatt("THVH","SEEN",0);
999 gMC->Gsatt("TPSR","SEEN",0);
1000 gMC->Gsatt("THVL","SEEN",0);
1001 gMC->Gsatt("THVC","SEEN",0);
1002 gMC->Gsatt("THVE","SEEN",0);
1003 gMC->Gsatt("THVR","SEEN",0);
1006 gMC->Gdopt("hide", "on");
1007 gMC->Gdopt("shad", "on");
1008 gMC->Gsatt("*", "fill", 7);
1009 gMC->SetClipBox(".");
1010 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1011 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1012 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1013 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1014 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1015 gMC->DefaultRange();
1016 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1017 gMC->Gdhead(1111, "Time Projection Chamber");
1018 gMC->Gdman(18, 4, "MAN");
1019 gMC->Gdopt("hide","off");
1022 //_____________________________________________________________________________
1023 void AliTPCv0::Init()
1026 // Initialise Time Projection Chamber version 0
1029 printf("%s: *** TPC version 0 initialized***\n",ClassName());
1031 // printf("TPC version 0 initialized\n");
1034 //_____________________________________________________________________________
1035 void AliTPCv0::StepManager()
1038 // Procedure called at each step in the TPC