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 2 -- detailed TPC and slow simulation //
25 <img src="picts/AliTPCv2Class.gif">
30 ///////////////////////////////////////////////////////////////////////////////
34 #include <TLorentzVector.h>
38 #include "AliMathBase.h"
39 #include "AliTrackReference.h"
40 #include "AliTPCParam.h"
41 #include "AliTPCTrackHitsV2.h"
43 #include "AliGeomManager.h"
44 #include "TGeoVolume.h"
49 #include "TGeoCompositeShape.h"
51 #include "TGeoPhysicalNode.h"
52 #include "TGeoHalfSpace.h"
56 //_____________________________________________________________________________
57 AliTPCv2::AliTPCv2(const char *name, const char *title) :
64 // Standard constructor for Time Projection Chamber version 2
68 SetBufferSize(128000);
72 // fTPCParam->Write(fTPCParam->GetTitle());
75 //_____________________________________________________________________________
76 void AliTPCv2::CreateGeometry()
79 // Create the geometry of Time Projection Chamber version 2
83 <img src="picts/AliTPC.gif">
88 <img src="picts/AliTPCv2Tree.gif">
92 //----------------------------------------------------------
93 // This geometry is written using TGeo class
94 // Firstly the shapes are defined, and only then the volumes
95 // What is recognized by the MC are volumes
96 //----------------------------------------------------------
98 // tpc - this will be the mother volume
102 // here I define a volume TPC
103 // retrive the medium name with "TPC_" as a leading string
105 TGeoPcon *tpc = new TGeoPcon(0.,360.,20); //20 sections
107 tpc->DefineSection(0,-291.,77.,278.);
108 tpc->DefineSection(1,-270,77.,278.);
110 tpc->DefineSection(2,-270.,77.,278.);
111 tpc->DefineSection(3,-259.6,70.,278.);
113 tpc->DefineSection(4,-259.6,68.1,278.);
114 tpc->DefineSection(5,-253.6,68.1,278.);
116 tpc->DefineSection(6,-253.6,68.,278.);
117 tpc->DefineSection(7,-74.0,60.8,278.);
119 tpc->DefineSection(8,-74.0,60.1,278.);
120 tpc->DefineSection(9,-73.3,60.1,278.);
122 tpc->DefineSection(10,-73.3,56.9,278.);
123 tpc->DefineSection(11,73.3,56.9,278.);
125 tpc->DefineSection(12,73.3,60.1,278.);
126 tpc->DefineSection(13,74.0,60.1,278.);
128 tpc->DefineSection(14,74.0,60.8,278.);
129 tpc->DefineSection(15,253.6,65.5,278.);
131 tpc->DefineSection(16,253.6,65.6,278.);
132 tpc->DefineSection(17,259.6,65.6,278.);
134 tpc->DefineSection(18,259.6,70.0,278.);
135 tpc->DefineSection(19,291.,77.,278.);
137 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
138 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
140 // drift volume - sensitive volume, extended beyond the
141 // endcaps, because of the alignment
143 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
144 dvol->DefineSection(0,-260.,74.5,264.4);
145 dvol->DefineSection(1,-253.6,74.5,264.4);
147 dvol->DefineSection(2,-253.6,76.6774,258.);
148 dvol->DefineSection(3,253.6,76.6774,258.);
150 dvol->DefineSection(4,253.6,74.5,264.4);
151 dvol->DefineSection(5,260.,74.5,264.4);
153 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
154 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
160 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
162 tpco->DefineSection(0,-256.6,264.8,278.);
163 tpco->DefineSection(1,-253.6,264.8,278.);
165 tpco->DefineSection(2,-253.6,258.,278.);
166 tpco->DefineSection(3,250.6,258.,278.);
168 tpco->DefineSection(4,250.6,258.,275.5);
169 tpco->DefineSection(5,253.6,258.,275.5);
171 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
172 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
174 // outer containment vessel
176 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
178 tocv->DefineSection(0,-256.6,264.8,278.);
179 tocv->DefineSection(1,-253.6,264.8,278.);
181 tocv->DefineSection(2,-253.6,274.8124,278.);
182 tocv->DefineSection(3,247.6,274.8124,278.);
184 tocv->DefineSection(4,247.6,270.4,278.);
185 tocv->DefineSection(5,250.6,270.4,278.);
187 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
188 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
190 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
191 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
192 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
193 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
195 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
196 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
197 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
198 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
200 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
201 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
202 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
203 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
204 //-------------------------------------------------------
205 // Tpc Outer Field Cage
206 // daughters - composite (sandwich)
207 //-------------------------------------------------------
209 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
211 tofc->DefineSection(0,-253.6,258.,269.6);
212 tofc->DefineSection(1,-250.6,258.,269.6);
214 tofc->DefineSection(2,-250.6,258.,260.0676);
215 tofc->DefineSection(3,250.6,258.,260.0676);
217 tofc->DefineSection(4,250.6,258.,275.5);
218 tofc->DefineSection(5,253.6,258.,275.5);
220 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
222 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
223 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
224 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
226 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
228 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
229 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
230 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
232 // outer part - positioning
234 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
236 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
238 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
240 v2->AddNode(v3,1); v2->AddNode(v4,1);
243 //--------------------------------------------------------------------
244 // Tpc Inner INsulator (CO2)
245 // the cones, the central drum and the inner f.c. sandwich with a piece
246 // of the flane will be placed in the TPC
247 //--------------------------------------------------------------------
248 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
250 tpci->DefineSection(0,-253.6,68.4,76.6774);
251 tpci->DefineSection(1,-74.0,61.2,76.6774);
253 tpci->DefineSection(2,74.0,61.2,76.6774);
255 tpci->DefineSection(3,253.6,65.9,76.6774);
257 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
259 // now the inner field cage - only part of flanges (2 copies)
261 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
262 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
264 //---------------------------------------------------------
265 // Tpc Inner Containment vessel - Muon side
266 //---------------------------------------------------------
267 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
269 tcms->DefineSection(0,-259.1,68.1,74.2);
270 tcms->DefineSection(1,-253.6,68.1,74.2);
272 tcms->DefineSection(2,-253.6,68.1,68.4);
273 tcms->DefineSection(3,-74.0,60.9,61.2);
275 tcms->DefineSection(4,-74.0,60.1,61.2);
276 tcms->DefineSection(5,-73.3,60.1,61.2);
278 tcms->DefineSection(6,-73.3,56.9,61.2);
279 tcms->DefineSection(7,-73.0,56.9,61.2);
281 tcms->DefineSection(8,-73.0,56.9,58.8);
282 tcms->DefineSection(9,-71.3,56.9,58.8);
284 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
285 //-----------------------------------------------
286 // inner containment vessel - shaft side
287 //-----------------------------------------------
288 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
290 tcss->DefineSection(0,71.3,56.9,58.8);
291 tcss->DefineSection(1,73.0,56.9,58.8);
293 tcss->DefineSection(2,73.0,56.9,61.2);
294 tcss->DefineSection(3,73.3,56.9,61.2);
296 tcss->DefineSection(4,73.3,60.1,61.2);
297 tcss->DefineSection(5,74.0,60.1,61.2);
299 tcss->DefineSection(6,74.0,60.9,61.2);
300 tcss->DefineSection(7,253.6,65.6,65.9);
302 tcss->DefineSection(8,253.6,65.6,74.2);
303 tcss->DefineSection(9,258.1,65.6,74.2);
305 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
306 //-----------------------------------------------
308 // define 4 parts and make an assembly
309 //-----------------------------------------------
310 // part1 - Al - 2 copies
311 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
312 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
313 // sandwich - outermost parts - 2 copies
314 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
315 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
316 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
317 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
319 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
320 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
321 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
322 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
324 // middle parts - 2 copies
325 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
326 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
327 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
328 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
330 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
331 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
332 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
333 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
334 // central part - 1 copy
335 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
336 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
337 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
339 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
340 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
341 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
343 // inner part - positioning
345 // creating a sandwich
346 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
348 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
350 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
352 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
354 tv100->AddNode(tv10,1);
355 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
356 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
357 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
358 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
359 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
360 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
362 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
363 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
364 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
365 v9->AddNode(tv100,1);
371 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
372 cfl->DefineSection(0,-71.1,59.7,61.2);
373 cfl->DefineSection(1,-68.6,59.7,61.2);
375 cfl->DefineSection(2,-68.6,60.6324,61.2);
376 cfl->DefineSection(3,68.6,60.6324,61.2);
378 cfl->DefineSection(4,68.6,59.7,61.2);
379 cfl->DefineSection(5,71.1,59.7,61.2);
381 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
383 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
384 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
385 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
387 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
388 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
389 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
390 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
392 // seals for central drum 2 copies
394 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
395 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
396 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
397 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
398 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
401 TGeoPcon *se = new TGeoPcon(0.,360.,6);
402 se->DefineSection(0,-72.8,59.7,61.2);
403 se->DefineSection(1,-72.3,59.7,61.2);
405 se->DefineSection(2,-72.3,58.85,61.2);
406 se->DefineSection(3,-71.6,58.85,61.2);
408 se->DefineSection(4,-71.6,59.7,61.2);
409 se->DefineSection(5,-71.3,59.7,61.2);
411 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
413 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
414 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
416 // define reflection matrix
418 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
420 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
422 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
423 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
424 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
426 // central membrane - 2 rings and a mylar membrane - assembly
428 TGeoTube *ih = new TGeoTube(80.1,84.1,0.2);
429 TGeoTube *oh = new TGeoTube(250.,265.,0.2);
430 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
431 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
432 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
433 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
435 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
441 // end caps - they are make as an assembly of single segments
442 // containing both readout chambers
444 Double_t openingAngle = 10.*TMath::DegToRad();
445 Double_t thick=1.5; // rib
446 Double_t shift = thick/TMath::Sin(openingAngle);
448 Double_t lowEdge = 86.3; // hole in the wheel
449 Double_t upEdge = 240.4; // hole in the wheel
451 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
453 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
455 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
456 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
458 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
459 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
461 Double_t ys = shift*TMath::Sin(openingAngle);
462 Double_t xs = shift*TMath::Cos(openingAngle);
463 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
464 tr->RegisterYourself();
465 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
466 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
467 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
468 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
469 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
470 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
471 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
473 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
479 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
480 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
482 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
483 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
484 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
486 Double_t tga = (19.8328-12.3742)/39.3;
488 xmin = 9.55*tga+12.3742;
489 xmax = 9.95*tga+12.3742;
490 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
491 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
492 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
493 xmin=19.4*tga+12.3742;
494 xmax=19.9*tga+12.3742;
495 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
496 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
497 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
498 xmin=29.35*tga+12.3742;
499 xmax=29.75*tga+12.3742;
500 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
501 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
502 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
504 // holes for connectors
506 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
507 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
508 TString fileName(gSystem->Getenv("ALICE_ROOT"));
509 fileName += "/TPC/conn_iroc.dat";
511 in.open(fileName.Data(), ios_base::in); // asci file
512 for(Int_t i =0;i<86;i++){
517 TGeoRotation *rrr = new TGeoRotation();
519 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
520 ibdv->AddNode(connv,i+1,trans);
524 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
526 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
527 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
528 tr1->RegisterYourself();
529 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
530 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
532 // pad plane and wire fixations
534 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
535 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
536 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
537 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
538 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
539 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
540 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
542 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
544 iroc->AddNode(ibdv,1);
545 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
546 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
547 tga =(23.3521-14.5974)/49.65;
548 Double_t xx = 24.825*tga+14.5974-0.6;
549 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
550 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
554 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
555 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
556 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
557 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
558 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
560 tga=(38.5084-20.2938)/99.3;
561 xmin=tga*10.2+20.2938;
562 xmax=tga*10.6+20.2938;
563 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
564 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
566 xmin=22.55*tga+20.2938;
567 xmax=24.15*tga+20.2938;
568 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
569 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
571 xmin=36.1*tga+20.2938;
572 xmax=36.5*tga+20.2938;
573 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
574 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
576 xmin=49.0*tga+20.2938;
577 xmax=50.6*tga+20.2938;
578 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
579 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
581 xmin=63.6*tga+20.2938;
582 xmax=64.0*tga+20.2938;
583 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
584 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
586 xmin=75.5*tga+20.2938;
587 xmax=77.15*tga+20.2938;
588 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
589 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
591 xmin=88.7*tga+20.2938;
592 xmax=89.1*tga+20.2938;
593 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
594 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
596 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
597 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
598 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
599 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
600 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
601 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
602 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
604 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
605 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
606 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
607 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
608 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
610 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
611 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
612 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
613 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
614 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
616 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
617 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
618 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
619 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
620 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
621 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
622 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
623 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
625 // holes for connectors
627 fileName = gSystem->Getenv("ALICE_ROOT");
628 fileName += "/TPC/conn_oroc.dat";
629 in.open(fileName.Data(), ios_base::in); // asci file
630 for(Int_t i =0;i<78;i++){
633 Double_t x1,z1,x2,z2;
635 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
636 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
638 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
640 TGeoRotation *rr = new TGeoRotation();
644 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
645 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
646 obdv->AddNode(connv,i+1,trans1);
647 obdv->AddNode(connv,i+79,trans2);
651 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
652 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
653 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
654 tr5->RegisterYourself();
655 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
656 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
658 // pad plane and wire fixations
660 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
661 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
663 tga=(43.5239-23.3874)/114.2;
664 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
665 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
666 xx = 57.1*tga+23.3874-0.7;
667 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
668 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
670 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
672 oroc->AddNode(obdv,1);
673 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
674 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
675 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
676 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
678 // now iroc and oroc are placed into a sector...
680 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
681 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
701 secta->AddNode(ch,1);
702 secta->AddNode(iroc,1,combi1a);
703 secta->AddNode(oroc,1,combi2a);
707 sectc->AddNode(ch,1);
708 sectc->AddNode(iroc,1,combi1c);
709 sectc->AddNode(oroc,1,combi2c);
711 // now I try to make wheels...
713 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
714 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
716 for(Int_t i =0;i<18;i++){
717 Double_t phi = (20.*i);
718 TGeoRotation *r = new TGeoRotation();
720 wheela->AddNode(secta,i+1,r);
721 wheelc->AddNode(sectc,i+1,r);
724 // wheels in the drift volume!
726 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
727 v9->AddNode(wheela,1,combi3);
728 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
729 //_____________________________________________________________
730 // service support wheel
731 //_____________________________________________________________
732 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
733 sw->DefineSection(0,-4.,80.5,251.75);
734 sw->DefineSection(1,4.,80.5,251.75);
735 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
738 shift = thick/TMath::Sin(openingAngle);
739 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
740 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
741 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
742 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
744 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
745 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
746 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
747 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
748 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
753 ys = shift*TMath::Sin(openingAngle);
754 xs = shift*TMath::Cos(openingAngle);
755 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
757 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
758 co->DefineSection(0,-0.5,77.,255.25);
759 co->DefineSection(1,0.5,77.,255.25);
760 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
762 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
763 shift=4./TMath::Sin(openingAngle);
764 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
765 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
767 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
769 ys = shift*TMath::Sin(openingAngle);
770 xs = shift*TMath::Cos(openingAngle);
771 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
773 // Sector as an Assembly
775 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
776 swhs->AddNode(swv,1);
777 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
778 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
780 // SSW as an Assembly of sectors
782 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
783 for(Int_t i =0;i<18;i++){
784 Double_t phi = (20.*i);
785 TGeoRotation *r = new TGeoRotation();
787 swheel->AddNode(swhs,i+1,r);
789 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
790 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
792 // sensitive strips - strip "0" is always set
795 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
798 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
799 upar=new Double_t [10];
808 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
815 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
816 gGeoManager->Node("TPC_Strip",totrows+1,
817 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
819 // now, strips optionally
823 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
824 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
829 gGeoManager->Node("TPC_Strip",i,
830 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
831 gGeoManager->Node("TPC_Strip",totrows+i,
832 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
835 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
836 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
841 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
842 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
843 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
844 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
847 //----------------------------------------------------------
848 // TPC Support Rods - MAKROLON
849 //----------------------------------------------------------
850 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
851 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
852 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
853 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");
854 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
855 TGeoMedium *m13 = gGeoManager->GetMedium("TPC_Brass");
857 // tpc rod is an assembly of 10 long parts and 2 short parts
858 // connected with alu rings and plagged on both sides.
863 TGeoPcon *rod = new TGeoPcon("rod",0.,360.,6);
864 rod->DefineSection(0,-10.43,1.92,2.08);
865 rod->DefineSection(1,-9.75,1.92,2.08);
867 rod->DefineSection(2,-9.75,1.8,2.2);
868 rod->DefineSection(3,9.75,1.8,2.2);
870 rod->DefineSection(4,9.75,1.92,2.08);
871 rod->DefineSection(5,10.43,1.92,2.08);
873 TGeoVolume *mrodl = new TGeoVolume("TPC_mrodl",rod,m6);
877 TGeoPcon *rod1 = new TGeoPcon("rod1",0.,360.,6);
878 rod1->DefineSection(0,-8.93,1.92,2.08);
879 rod1->DefineSection(1,-8.25,1.92,2.08);
881 rod1->DefineSection(2,-8.25,1.8,2.2);
882 rod1->DefineSection(3,8.25,1.8,2.2);
884 rod1->DefineSection(4,8.25,1.92,2.08);
885 rod1->DefineSection(5,8.93,1.92,2.08);
887 TGeoVolume *mrods = new TGeoVolume("TPC_mrods",rod1,m6);
889 // below is for the resistor rod
891 // hole for the brass connectors
894 new TGeoTube("hhole",0.,0.3,0.3);
896 //transformations for holes - initialy they
897 // are placed at x=0 and negative y
899 TGeoRotation *rhole = new TGeoRotation();
901 TGeoCombiTrans *transf[13];
903 for(Int_t i=0;i<13;i++){
904 sprintf(name,"transf%d",i);
905 transf[i]= new TGeoCombiTrans(name,0.,-2.,-9.+i*1.5,rhole);
906 transf[i]->RegisterYourself();
908 // union expression for holes
909 TString operl("hhole:transf0");
910 for (Int_t i=1;i<13;i++){
911 sprintf(name,"+hhole:transf%d",i);
915 TString opers("hhole:transf1");
916 for (Int_t i=2;i<12;i++){
917 sprintf(name,"+hhole:transf%d",i);
921 new TGeoCompositeShape("hlv",operl.Data());
922 new TGeoCompositeShape("hsv",opers.Data());
924 TGeoCompositeShape *rodl = new TGeoCompositeShape("rodl","rod-hlv");
925 TGeoCompositeShape *rods = new TGeoCompositeShape("rods","rod1-hsv");
926 //rods - volumes - makrolon rods with holes
927 TGeoVolume *rodlv = new TGeoVolume("TPC_rodl",rodl,m6);
928 TGeoVolume *rodsv = new TGeoVolume("TPC_rods",rods,m6);
931 TGeoTube *bcon = new TGeoTube(0.,0.3,0.3);//connectors
932 TGeoVolume *bconv = new TGeoVolume("TPC_bcon",bcon,m13);
934 // hooks holding strips
936 new TGeoBBox("hk1",0.625,0.015,0.75);
937 new TGeoBBox("hk2",0.625,0.015,0.15);
938 TGeoTranslation *tr21 = new TGeoTranslation("tr21",0.,-0.03,-0.6);
939 TGeoTranslation *tr12 = new TGeoTranslation("tr12",0.,-0.03,0.6);
940 tr21->RegisterYourself();
941 tr12->RegisterYourself();
943 TGeoCompositeShape *hook = new TGeoCompositeShape("hook","hk1+hk2:tr21+hk2:tr12");
944 TGeoVolume *hookv = new TGeoVolume("TPC_hook",hook,m13);
946 // assembly of the short rod with connectors and hooks
951 TGeoVolumeAssembly *spart = new TGeoVolumeAssembly("TPC_spart");
953 spart->AddNode( rodsv,1);
954 for(Int_t i=1;i<12;i++){
955 spart->AddNode(bconv,i,transf[i]);
957 for(Int_t i =0;i<11;i++){
958 spart->AddNode(hookv,i+1,new TGeoTranslation(0.,-2.3,-7.5+i*1.5));
963 TGeoVolumeAssembly *lpart = new TGeoVolumeAssembly("TPC_lpart");
965 lpart->AddNode( rodlv,1);
966 for(Int_t i=0;i<13;i++){
967 lpart->AddNode(bconv,i,transf[i]);
969 for(Int_t i =0;i<13;i++){
970 lpart->AddNode(hookv,i+1,new TGeoTranslation(0.,-2.3,-9.+i*1.5));
975 new TGeoTube("ring1",2.1075,2.235,0.53);
976 new TGeoTube("ring2",1.7925,1.89,0.43);
977 new TGeoTube("ring3",1.89,2.1075,0.05);
978 TGeoCompositeShape *ring = new TGeoCompositeShape("ring","ring1+ring2+ring3");
979 TGeoVolume *ringv = new TGeoVolume("TPC_ring",ring,m3);
983 TGeoVolumeAssembly *tpcrod = new TGeoVolumeAssembly("TPC_rod");//rrod
984 TGeoVolumeAssembly *tpcmrod = new TGeoVolumeAssembly("TPC_mrod");//makrolon rod
986 for(Int_t i=0;i<11;i++){
987 tpcrod->AddNode(ringv,i+1,new TGeoTranslation(0.,0.,-105.+i*21));
988 tpcmrod->AddNode(ringv,i+12,new TGeoTranslation(0.,0.,-105.+i*21));
990 for(Int_t i=0;i<10;i++){
991 tpcrod->AddNode(lpart,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));
992 tpcmrod->AddNode(mrodl,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));
997 tpcrod->AddNode(spart,1,new TGeoTranslation(0.,0.,-114.));
998 tpcrod->AddNode(spart,2,new TGeoTranslation(0.,0.,114.));
999 tpcrod->AddNode(ringv,23,new TGeoTranslation(0.,0.,-123.));
1000 tpcrod->AddNode(ringv,24,new TGeoTranslation(0.,0.,123.));
1002 tpcmrod->AddNode(mrods,1,new TGeoTranslation(0.,0.,-114.));
1003 tpcmrod->AddNode(mrods,2,new TGeoTranslation(0.,0.,114.));
1004 tpcmrod->AddNode(ringv,25,new TGeoTranslation(0.,0.,-123.));
1005 tpcmrod->AddNode(ringv,26,new TGeoTranslation(0.,0.,123.));
1009 TGeoPcon *lp = new TGeoPcon(0.,360.,4);
1011 lp->DefineSection(0,-125.8,1.92,2.235);
1012 lp->DefineSection(1,-124.8,1.92,2.235);
1014 lp->DefineSection(2,-124.8,1.92,2.08);
1015 lp->DefineSection(3,-123.1,1.92,2.08);
1017 TGeoVolume *lpv1 = new TGeoVolume("TPC_lpv1",lp,m6);
1018 TGeoVolume *lpv2 = new TGeoVolume("TPC_lpv2",lp,m6);
1020 TGeoTube *lr = new TGeoTube(2.1075,2.235,0.5);
1021 TGeoVolume *lrv = new TGeoVolume("TPC_lrv",lr,m3);
1023 lpv2->AddNode(lrv,1,new TGeoTranslation(0.,0.,-125.3));
1025 tpcrod->AddNode(lpv2,1);
1026 tpcmrod->AddNode(lpv1,1);
1030 TGeoTube *rp = new TGeoTube(1.92,2.08,2.25);
1031 TGeoVolume *rpv = new TGeoVolume("TPC_rpv",rp,m6);
1032 tpcrod->AddNode(rpv,1, new TGeoTranslation(0.,0.,125.35));
1033 tpcmrod->AddNode(rpv,2,new TGeoTranslation(0.,0.,125.35));
1036 //HV rods - makrolon + 0.58cm (diameter) Cu
1037 TGeoTube *hvr = new TGeoTube(0.,1.465,126.7);
1038 TGeoTube *hvc = new TGeoTube(0.,0.29,126.7);
1040 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
1041 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
1042 hvrv->AddNode(hvcv,1);
1046 TGeoTube *cr = new TGeoTube(0.,0.45,126.7);
1047 TGeoTube *cw = new TGeoTube(0.,0.15,126.7);
1048 TGeoVolume *crv = new TGeoVolume("TPC_CR",cr,m10);
1049 TGeoVolume *cwv = new TGeoVolume("TPC_W",cw,m11);
1051 // ceramic rod with water
1053 crv->AddNode(cwv,1);
1057 TGeoTube *pr =new TGeoTube(0.2,0.35,126.7);
1058 TGeoVolume *prv = new TGeoVolume("TPC_PR",pr,m12);
1060 // copper plates with connectors
1062 new TGeoTube("tub",0.,1.7,0.025);
1064 // half space - points on the plane and a normal vector
1067 Double_t slope = TMath::Tan(22.*TMath::DegToRad());
1068 Double_t intp = 1.245;
1070 Double_t b = slope*slope+1.;
1079 norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
1083 new TGeoHalfSpace("sp1",p,n);
1092 norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
1096 new TGeoHalfSpace("sp2",p,n);
1099 new TGeoTube("h1",0.,0.5,0.025);
1100 new TGeoTube("h2",0.,0.35,0.025);
1102 TGeoTranslation *ttr11 = new TGeoTranslation("ttr11",-0.866,0.5,0.);
1103 TGeoTranslation *ttr22 = new TGeoTranslation("ttr22",0.866,0.5,0.);
1104 ttr11->RegisterYourself();
1105 ttr22->RegisterYourself();
1106 // elastic connector
1107 new TGeoBBox("elcon",0.72,0.005,0.3);
1108 TGeoRotation *crr1 = new TGeoRotation();
1109 crr1->RotateZ(-22.);
1110 TGeoCombiTrans *ctr1 = new TGeoCombiTrans("ctr1",-0.36011, -1.09951,-0.325,crr1);
1111 ctr1->RegisterYourself();
1112 TGeoCompositeShape *cs1 = new TGeoCompositeShape("cs1",
1113 "(((((tub-h1:ttr11)-h1:ttr22)-sp1)-sp2)-h2)+elcon:ctr1");
1115 TGeoVolume *csvv = new TGeoVolume("TPC_RR_CU",cs1,m7);
1117 // resistor rod assembly 2 ceramic rods, peak rod, Cu plates
1120 TGeoVolumeAssembly *rrod = new TGeoVolumeAssembly("TPC_RROD");
1122 rrod->AddNode(crv,1,ttr11);
1123 rrod->AddNode(crv,2,ttr22);
1124 rrod->AddNode(prv,1);
1126 for(Int_t i=0;i<165;i++){
1127 rrod->AddNode(csvv,i+1,new TGeoTranslation(0.,0.,-122.675+i*1.5));
1130 TGeoTube *res = new TGeoTube(0.,0.15,0.5);
1131 TGeoVolume *resv = new TGeoVolume("TPC_RES",res,m10);
1132 TGeoVolumeAssembly *ress = new TGeoVolumeAssembly("TPC_RES_CH");
1133 ress->AddNode(resv,1,new TGeoTranslation(0.2,0.,0.));
1134 ress->AddNode(resv,2,new TGeoTranslation(-0.2,0.,0.));
1136 TGeoRotation *crr2 = new TGeoRotation();
1138 TGeoRotation *crr3 = new TGeoRotation();
1139 crr3->RotateY(-30.);
1141 for(Int_t i=0;i<164;i+=2){
1142 rrod->AddNode(ress,i+1, new TGeoCombiTrans(0.,1.2,-121.925+i*1.5,crr2));
1143 rrod->AddNode(ress,i+2, new TGeoCombiTrans(0.,1.2,-121.925+(i+1)*1.5,crr3));
1145 rrod->AddNode(tpcrod,1,new TGeoCombiTrans(0.,0.,0.9,crr1));
1147 //------------------------------------------------------------------
1148 TGeoRotation refl("refl",90.,0.,90.,90.,180.,0.);
1149 TGeoRotation rotrod("rotrod");
1150 TGeoRotation *rotpos = new TGeoRotation("rotpos");
1152 TGeoRotation *rotrod1 = new TGeoRotation("rotrod1");
1156 for(Int_t i=0;i<18;i++){
1159 angle=TMath::DegToRad()*20.*(Double_t)i;
1162 x=r * TMath::Cos(angle);
1163 y=r * TMath::Sin(angle);
1166 if(i==11){//resistor rod inner
1167 rotrod.RotateZ(-90.+angle);
1168 rotrod1->RotateZ(-90.+angle);
1169 *rotpos = refl*rotrod; //rotation+reflection
1170 v9->AddNode(rrod,1,new TGeoCombiTrans(x,y, z, rotrod1)); //A
1171 v9->AddNode(rrod,2,new TGeoCombiTrans(x,y,-z, rotpos)); //C
1174 v9->AddNode(tpcmrod,i+1,new TGeoTranslation(x,y,z));//shaft
1175 v9->AddNode(tpcmrod,i+19,new TGeoCombiTrans(x,y,-z,ref));//muon
1179 x=r * TMath::Cos(angle);
1180 y=r * TMath::Sin(angle);
1182 rotrod.RotateZ(90.+angle);
1183 rotrod1->RotateZ(90.+angle);
1184 *rotpos = refl*rotrod;//rotation+reflection
1186 if(i==3){//resistor rod outer
1187 rotrod.RotateZ(90.+angle);
1188 rotrod1->RotateZ(90.+angle);
1189 *rotpos = refl*rotrod;//rotation+reflection
1190 v9->AddNode(rrod,3,new TGeoCombiTrans(x,y, z, rotrod1)); //A
1191 v9->AddNode(rrod,4,new TGeoCombiTrans(x,y, -z, rotpos)); //C
1194 v9->AddNode(tpcmrod,i+37,new TGeoTranslation(x,y,z));//shaft
1195 v9->AddNode(tpcmrod,i+55,new TGeoCombiTrans(x,y,-z,ref));//muon
1198 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z)); //hv->A-side only
1200 } //end of rods positioning
1202 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
1203 alice->AddNode(v1,1);
1205 } // end of function
1207 //_____________________________________________________________________________
1208 void AliTPCv2::AddAlignableVolumes() const
1211 // Create entries for alignable volumes associating the symbolic volume
1212 // name with the corresponding volume path. Needs to be syncronized with
1213 // eventual changes in the geometry.
1215 SetInnerChambersAlignable();
1216 SetOuterChambersAlignable();
1219 //_____________________________________________________________________________
1220 void AliTPCv2::SetInnerChambersAlignable() const
1223 AliGeomManager::ELayerID idTPC1 = AliGeomManager::kTPC1;
1224 Int_t modUID, modnum = 0;
1225 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1226 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1227 TString vpappend = "/TPC_IROC_1";
1228 TString snstr1="TPC/EndcapA/Sector";
1229 TString snstr2="TPC/EndcapC/Sector";
1230 TString snappend="/InnerChamber";
1231 TString volpath, symname;
1233 for(Int_t cnt=1; cnt<=18; cnt++){
1234 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
1237 volpath += vpappend;
1240 symname += snappend;
1241 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1242 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1243 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1244 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1245 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
1246 alignableEntry->SetMatrix(matTtoL);
1249 for(Int_t cnt=1; cnt<=18; cnt++){
1250 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
1253 volpath += vpappend;
1256 symname += snappend;
1257 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1258 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1259 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1260 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1261 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
1262 alignableEntry->SetMatrix(matTtoL);
1266 //_____________________________________________________________________________
1267 void AliTPCv2::SetOuterChambersAlignable() const
1270 AliGeomManager::ELayerID idTPC2 = AliGeomManager::kTPC2;
1271 Int_t modUID, modnum = 0;
1272 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1273 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1274 TString vpappend = "/TPC_OROC_1";
1275 TString snstr1="TPC/EndcapA/Sector";
1276 TString snstr2="TPC/EndcapC/Sector";
1277 TString snappend="/OuterChamber";
1278 TString volpath, symname;
1280 for(Int_t cnt=1; cnt<=18; cnt++){
1281 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
1284 volpath += vpappend;
1287 symname += snappend;
1288 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1289 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1290 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1291 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1292 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
1293 alignableEntry->SetMatrix(matTtoL);
1296 for(Int_t cnt=1; cnt<=18; cnt++){
1297 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
1300 volpath += vpappend;
1303 symname += snappend;
1304 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1305 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1306 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1307 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1308 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
1309 alignableEntry->SetMatrix(matTtoL);
1313 //_____________________________________________________________________________
1314 void AliTPCv2::DrawDetector() const
1317 // Draw a shaded view of the Time Projection Chamber version 1
1320 // Set everything unseen
1321 gMC->Gsatt("*", "seen", -1);
1323 // Set ALIC mother transparent
1324 gMC->Gsatt("ALIC","SEEN",0);
1326 // Set the volumes visible
1329 gMC->Gsatt("TPC ","SEEN",0);
1330 gMC->Gsatt("TOIN","SEEN",1);
1331 gMC->Gsatt("TOIN","COLO",7);
1332 gMC->Gsatt("TOCV","SEEN",1);
1333 gMC->Gsatt("TOCV","COLO",4);
1334 gMC->Gsatt("TSA1","SEEN",0);
1335 gMC->Gsatt("TSA2","SEEN",0);
1336 gMC->Gsatt("TSA3","SEEN",0);
1337 gMC->Gsatt("TSA4","SEEN",0);
1338 gMC->Gsatt("TSA5","SEEN",0);
1339 gMC->Gsatt("TOFC","SEEN",1);
1340 gMC->Gsatt("TOFC","COLO",4);
1341 gMC->Gsatt("TSA6","SEEN",0);
1342 gMC->Gsatt("TSA7","SEEN",0);
1343 gMC->Gsatt("TSA8","SEEN",0);
1344 gMC->Gsatt("TIIN","SEEN",1);
1345 gMC->Gsatt("TIIN","COLO",7);
1346 gMC->Gsatt("TII1","SEEN",0);
1347 gMC->Gsatt("TIFC","SEEN",1);
1348 gMC->Gsatt("TIFC","COLO",4);
1349 gMC->Gsatt("TSA9","SEEN",0);
1350 gMC->Gsatt("TS10","SEEN",0);
1351 gMC->Gsatt("TS11","SEEN",0);
1352 gMC->Gsatt("TS12","SEEN",0);
1353 gMC->Gsatt("TS13","SEEN",0);
1354 gMC->Gsatt("TS14","SEEN",0);
1355 gMC->Gsatt("TICC","SEEN",0);
1356 gMC->Gsatt("TICM","SEEN",0);
1357 gMC->Gsatt("TS15","SEEN",0);
1358 gMC->Gsatt("TS16","SEEN",0);
1359 gMC->Gsatt("TS17","SEEN",0);
1360 gMC->Gsatt("TS18","SEEN",0);
1361 gMC->Gsatt("TS19","SEEN",0);
1362 gMC->Gsatt("TPJ1","SEEN",0);
1363 gMC->Gsatt("TPJ2","SEEN",0);
1364 gMC->Gsatt("TICS","SEEN",0);
1365 gMC->Gsatt("TDGN","SEEN",0);
1366 gMC->Gsatt("TIRC","SEEN",0);
1367 gMC->Gsatt("TIC1","SEEN",1);
1368 gMC->Gsatt("TIPP","SEEN",0);
1369 gMC->Gsatt("TIC3","SEEN",0);
1370 gMC->Gsatt("TRCE","SEEN",0);
1371 gMC->Gsatt("TPSC","SEEN",0);
1372 gMC->Gsatt("TPCC","SEEN",0);
1373 gMC->Gsatt("TORC","SEEN",0);
1374 gMC->Gsatt("TOPP","SEEN",0);
1375 gMC->Gsatt("TOC3","SEEN",0);
1376 gMC->Gsatt("TOC1","SEEN",1);
1377 gMC->Gsatt("TSSW","SEEN",1);
1378 gMC->Gsatt("TSWC","SEEN",1);
1379 gMC->Gsatt("TSSW","COLO",3);
1380 gMC->Gsatt("TSWC","COLO",3);
1381 gMC->Gsatt("TSCE","COLO",6);
1382 gMC->Gsatt("TSCE","SEEN",1);
1383 gMC->Gsatt("TWES","SEEN",0);
1384 gMC->Gsatt("TSWB","SEEN",0);
1385 gMC->Gsatt("TPEL","SEEN",0);
1386 gMC->Gsatt("TPMW","SEEN",1);
1387 gMC->Gsatt("TESR","SEEN",1);
1388 gMC->Gsatt("TPMW","COLO",12);
1389 gMC->Gsatt("TIC1","COLO",5);
1390 gMC->Gsatt("TOC1","COLO",5);
1391 gMC->Gsatt("TESB","SEEN",0);
1392 gMC->Gsatt("THVM","SEEN",1);
1393 gMC->Gsatt("THVM","COLO",11);
1394 gMC->Gsatt("THVH","SEEN",0);
1395 gMC->Gsatt("TPSR","SEEN",0);
1396 gMC->Gsatt("THVL","SEEN",0);
1397 gMC->Gsatt("THVC","SEEN",0);
1398 gMC->Gsatt("THVE","SEEN",0);
1399 gMC->Gsatt("THVR","SEEN",0);
1400 gMC->Gsatt("TPSS","SEEN",0);
1401 gMC->Gsatt("TPUS","SEEN",0);
1402 gMC->Gsatt("TPLS","SEEN",0);
1405 gMC->Gdopt("hide", "on");
1406 gMC->Gdopt("shad", "on");
1407 gMC->Gsatt("*", "fill", 7);
1408 gMC->SetClipBox(".");
1409 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1410 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1411 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1412 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1413 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1414 gMC->DefaultRange();
1415 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1416 gMC->Gdhead(1111, "Time Projection Chamber");
1417 gMC->Gdman(18, 4, "MAN");
1418 gMC->Gdopt("hide","off");
1421 //_____________________________________________________________________________
1422 void AliTPCv2::CreateMaterials()
1425 // Define materials for version 2 of the Time Projection Chamber
1428 AliTPC::CreateMaterials();
1431 //_____________________________________________________________________________
1432 void AliTPCv2::Init()
1435 // Initialises version 2 of the TPC after that it has been built
1438 Int_t *idtmed = fIdtmed->GetArray();
1443 fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected...
1445 fIDrift=gMC->VolId("TPC_Drift");
1446 fSecOld=-100; // fake number
1448 gMC->SetMaxNStep(-30000); // max. number of steps increased
1450 if (fPrimaryIonisation) {
1451 gMC->Gstpar(idtmed[2],"PRIMIO_E", 20.77); // 1st ionisation potential
1453 gMC->Gstpar(idtmed[2],"PRIMIO_N", 14.35);
1454 gMC->Gstpar(idtmed[2],"LOSS", 14); // specific energy loss
1455 gMC->Gstpar(idtmed[2],"STRA",4);
1457 gMC->Gstpar(idtmed[2],"LOSS", 5); // specific energy loss
1461 AliDebug(1,"*** TPC version 2 initialized ***");
1462 AliDebug(1,Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
1468 //_____________________________________________________________________________
1469 void AliTPCv2::StepManager()
1472 // Called for every step in the Time Projection Chamber
1476 // parameters used for the energy loss calculations
1478 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1479 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1480 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1481 const Int_t kMaxDistRef =15; // maximal difference between 2 stored references
1483 const Float_t kbig = 1.e10;
1490 vol[1]=0; // preset row number to 0
1492 if (fPrimaryIonisation) gMC->SetMaxStep(kbig);
1494 if(!gMC->IsTrackAlive()) return; // particle has disappeared
1496 Float_t charge = gMC->TrackCharge();
1498 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1500 // check the sensitive volume
1502 id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1503 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
1505 gMC->TrackPosition(p);
1506 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1510 Double_t angle = TMath::ACos(p[0]/r);
1511 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1513 // angular segment, it is not a real sector number...
1515 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1516 fTPCParam->GetInnerAngle());
1517 // rotate to segment "0"
1519 fTPCParam->AdjustCosSin(sector,cos,sin);
1520 Float_t x1=p[0]*cos + p[1]*sin;
1521 // check if within sector's limits
1522 if((x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp())
1523 ||(x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp())){
1524 // calculate real sector number...
1525 if (x1>fTPCParam->GetOuterRadiusLow()){
1526 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1527 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1528 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
1531 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1533 // here I have a sector number
1538 static Double_t lastReferenceR=0;
1539 if (TMath::Abs(lastReferenceR-r)>kMaxDistRef){
1540 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
1544 // check if change of sector
1545 if(sector != fSecOld){
1547 // add track reference
1548 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
1550 // track is in the sensitive strip
1552 // track is entering the strip
1553 if (gMC->IsTrackEntering()){
1554 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1555 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1556 // row numbers are autonomous for lower and upper sectors
1557 if(vol[0] > fTPCParam->GetNInnerSector()) {
1558 vol[1] -= fTPCParam->GetNRowLow();
1561 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
1563 // lower sector, row 0, because Jouri wants to have this
1565 gMC->TrackMomentum(p);
1569 hits[3]=0.; // this hit has no energy loss
1570 // Get also the track time for pileup simulation
1571 hits[4]=gMC->TrackTime();
1573 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1577 gMC->TrackPosition(p);
1581 hits[3]=0.; // this hit has no energy loss
1582 // Get also the track time for pileup simulation
1583 hits[4]=gMC->TrackTime();
1585 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1590 //-----------------------------------------------------------------
1591 // charged particle is in the sensitive drift volume
1592 //-----------------------------------------------------------------
1593 if(gMC->TrackStep() > 0) {
1595 if (!fPrimaryIonisation) {
1596 nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1599 Float_t edep = gMC->Edep();
1600 if (edep > 0.) nel = (Int_t)((gMC->Edep()*1.5)/kwIon) + 1;
1602 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1604 gMC->TrackPosition(p);
1608 hits[3]=(Float_t)nel;
1613 gMC->TrackMomentum(p);
1614 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1615 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
1616 fTrackHits->SetHitPrecision(precision);
1619 // Get also the track time for pileup simulation
1620 hits[4]=gMC->TrackTime();
1622 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1625 } //within sector's limits
1626 // Stemax calculation for the next step
1630 // below is valid only for Geant3 (fPromaryIonisation not set)
1631 if(!fPrimaryIonisation){
1632 gMC->TrackMomentum(mom);
1633 Float_t ptot=mom.Rho();
1634 Float_t betaGamma = ptot/gMC->TrackMass();
1636 Int_t pid=gMC->TrackPid();
1637 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1639 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1644 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
1645 pp=kprim*AliMathBase::BetheBlochAleph(betaGamma);
1649 Double_t rnd = gMC->GetRandom()->Rndm();
1651 gMC->SetMaxStep(-TMath::Log(rnd)/pp);