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Changes in the TPC mother volume geometry
[u/mrichter/AliRoot.git] / TPC / AliTPCv4.cxx
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457e2170 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
16/*
17$Log$
e6add757 18Revision 1.1 2007/06/24 20:56:19 hristov
19TPC version for the krypton runs (Marek)
20
457e2170 21*/
22
23//
24///////////////////////////////////////////////////////////////////////////////
25// //
26// Time Projection Chamber version 4 -- detailed TPC and slow simulation //
27// of Krypton decays //
28// //
29//Begin_Html //
30/*
31<img src="picts/AliTPCv2Class.gif">
32*/
33//End_Html
34// //
35// //
36///////////////////////////////////////////////////////////////////////////////
37
38//#include <stdlib.h>
39
40#include <TLorentzVector.h>
41#include <TPDGCode.h>
42#include <TString.h>
43#include "AliLog.h"
b40afa5e 44#include "AliMathBase.h"
457e2170 45#include "AliTPCParam.h"
46#include "AliTPCTrackHitsV2.h"
47#include "AliTPCv4.h"
48#include "TGeoVolume.h"
49#include "TGeoPcon.h"
50#include "TGeoTube.h"
51#include "TGeoPgon.h"
52#include "TGeoTrd1.h"
53#include "TGeoCompositeShape.h"
54#include "TGeoPara.h"
55#include "TGeoPhysicalNode.h"
56
57ClassImp(AliTPCv4)
58
59//_____________________________________________________________________________
60AliTPCv4::AliTPCv4(const char *name, const char *title) :
61 AliTPC(name, title),
62 fIdSens(0),
63 fIDrift(0),
64 fSecOld(0)
65{
66 //
67 // Standard constructor for Time Projection Chamber version 2
68 //
69
70
71 SetBufferSize(128000);
72
73
74 if (fTPCParam)
75 fTPCParam->Write(fTPCParam->GetTitle());
76}
77
78//_____________________________________________________________________________
79void AliTPCv4::CreateGeometry()
80{
81 //
82 // Create the geometry of Time Projection Chamber version 2
83 //
84 //Begin_Html
85 /*
86 <img src="picts/AliTPC.gif">
87 */
88 //End_Html
89 //Begin_Html
90 /*
91 <img src="picts/AliTPCv2Tree.gif">
92 */
93 //End_Html
94
95 //----------------------------------------------------------
96 // This geometry is written using TGeo class
97 // Firstly the shapes are defined, and only then the volumes
98 // What is recognized by the MC are volumes
99 //----------------------------------------------------------
100 //
101 // tpc - this will be the mother volume
102 //
103
104 //
105 // here I define a volume TPC
106 // retrive the medium name with "TPC_" as a leading string
107 //
4fb9bd37 108 TGeoPcon *tpc = new TGeoPcon(0.,360.,28); //28 sections
457e2170 109 //
78134e48 110 tpc->DefineSection(0,-291.,77.,278.);
111 tpc->DefineSection(1,-270,77.,278.);
457e2170 112 //
78134e48 113 tpc->DefineSection(2,-270.,77.,278.);
4fb9bd37 114 tpc->DefineSection(3,-262.1,77.,278.);
457e2170 115 //
4fb9bd37 116 tpc->DefineSection(4,-262.1,83.1,278.);
117 tpc->DefineSection(5,-260.,83.1,278.);
457e2170 118 //
4fb9bd37 119 tpc->DefineSection(6,-260.,70.,278.);
120 tpc->DefineSection(7,-259.6,70.,278.);
457e2170 121 //
4fb9bd37 122 tpc->DefineSection(8,-259.6,68.1,278.);
123 tpc->DefineSection(9,-253.6,68.1,278.);
457e2170 124 //
4fb9bd37 125 tpc->DefineSection(10,-253.6,68.,278.);
126 tpc->DefineSection(11,-74.0,60.8,278.);
457e2170 127 //
4fb9bd37 128 tpc->DefineSection(12,-74.0,60.1,278.);
129 tpc->DefineSection(13,-73.3,60.1,278.);
457e2170 130 //
4fb9bd37 131 tpc->DefineSection(14,-73.3,56.9,278.);
132 tpc->DefineSection(15,-68.5,56.9,278.);
78134e48 133 //
4fb9bd37 134 tpc->DefineSection(16,-68.5,60.,278.);
135 tpc->DefineSection(17,-65.,60.,278.);
78134e48 136 //
4fb9bd37 137 tpc->DefineSection(18,-65.,56.9,278.);
138 tpc->DefineSection(19,73.3,56.9,278.);
139 //
140 tpc->DefineSection(20,73.3,60.1,278.);
141 tpc->DefineSection(21,74.0,60.1,278.);
142 //
143 tpc->DefineSection(22,74.0,60.8,278.);
144 tpc->DefineSection(23,253.6,65.5,278.);
145 //
146 tpc->DefineSection(24,253.6,65.6,278.);
147 tpc->DefineSection(25,259.6,65.6,278.);
148 //
149 tpc->DefineSection(26,259.6,70.0,278.);
150 tpc->DefineSection(27,291.,77.,278.);
457e2170 151 //
152 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
153 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
154 //
155 // drift volume - sensitive volume, extended beyond the
156 // endcaps, because of the alignment
157 //
158 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
159 dvol->DefineSection(0,-260.,74.5,264.4);
160 dvol->DefineSection(1,-253.6,74.5,264.4);
161 //
162 dvol->DefineSection(2,-253.6,76.6774,258.);
163 dvol->DefineSection(3,253.6,76.6774,258.);
164 //
165 dvol->DefineSection(4,253.6,74.5,264.4);
166 dvol->DefineSection(5,260.,74.5,264.4);
167 //
f3d601a5 168 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-3");
457e2170 169 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
170 //
171 v1->AddNode(v9,1);
172 //
173 // outer insulator
174 //
175 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
176 //
177 tpco->DefineSection(0,-256.6,264.8,278.);
178 tpco->DefineSection(1,-253.6,264.8,278.);
179 //
180 tpco->DefineSection(2,-253.6,258.,278.);
181 tpco->DefineSection(3,250.6,258.,278.);
182 //
183 tpco->DefineSection(4,250.6,258.,275.5);
184 tpco->DefineSection(5,253.6,258.,275.5);
185 //
186 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
187 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
188 //
189 // outer containment vessel
190 //
191 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
192 //
193 tocv->DefineSection(0,-256.6,264.8,278.);
194 tocv->DefineSection(1,-253.6,264.8,278.);
195 //
196 tocv->DefineSection(2,-253.6,274.8124,278.);
197 tocv->DefineSection(3,247.6,274.8124,278.);
198 //
199 tocv->DefineSection(4,247.6,270.4,278.);
200 tocv->DefineSection(5,250.6,270.4,278.);
201 //
202 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
203 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
204 //
205 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
206 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
207 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
208 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
209 //
210 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
211 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
212 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
213 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
214 //
215 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
216 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
217 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
218 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
219 //-------------------------------------------------------
220 // Tpc Outer Field Cage
221 // daughters - composite (sandwich)
222 //-------------------------------------------------------
223
224 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
225 //
226 tofc->DefineSection(0,-253.6,258.,269.6);
227 tofc->DefineSection(1,-250.6,258.,269.6);
228 //
229 tofc->DefineSection(2,-250.6,258.,260.0676);
230 tofc->DefineSection(3,250.6,258.,260.0676);
231 //
232 tofc->DefineSection(4,250.6,258.,275.5);
233 tofc->DefineSection(5,253.6,258.,275.5);
234 //
235 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
236 //sandwich
237 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
238 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
239 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
240 //
241 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
242 //
243 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
244 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
245 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
246 //
247 // outer part - positioning
248 //
249 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
250 //
251 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
252 //
253 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
254 //
255 v2->AddNode(v3,1); v2->AddNode(v4,1);
256 //
257 v1->AddNode(v2,1);
258 //--------------------------------------------------------------------
259 // Tpc Inner INsulator (CO2)
260 // the cones, the central drum and the inner f.c. sandwich with a piece
261 // of the flane will be placed in the TPC
262 //--------------------------------------------------------------------
263 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
264 //
265 tpci->DefineSection(0,-253.6,68.4,76.6774);
266 tpci->DefineSection(1,-74.0,61.2,76.6774);
267 //
268 tpci->DefineSection(2,74.0,61.2,76.6774);
269 //
270 tpci->DefineSection(3,253.6,65.9,76.6774);
271 //
272 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
273 //
274 // now the inner field cage - only part of flanges (2 copies)
275 //
276 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
277 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
278 //
279 //---------------------------------------------------------
280 // Tpc Inner Containment vessel - Muon side
281 //---------------------------------------------------------
282 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
283 //
284 tcms->DefineSection(0,-259.1,68.1,74.2);
285 tcms->DefineSection(1,-253.6,68.1,74.2);
286 //
287 tcms->DefineSection(2,-253.6,68.1,68.4);
288 tcms->DefineSection(3,-74.0,60.9,61.2);
289 //
290 tcms->DefineSection(4,-74.0,60.1,61.2);
291 tcms->DefineSection(5,-73.3,60.1,61.2);
292 //
293 tcms->DefineSection(6,-73.3,56.9,61.2);
294 tcms->DefineSection(7,-73.0,56.9,61.2);
295 //
296 tcms->DefineSection(8,-73.0,56.9,58.8);
297 tcms->DefineSection(9,-71.3,56.9,58.8);
298 //
299 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
300 //-----------------------------------------------
301 // inner containment vessel - shaft side
302 //-----------------------------------------------
303 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
304 //
305 tcss->DefineSection(0,71.3,56.9,58.8);
306 tcss->DefineSection(1,73.0,56.9,58.8);
307 //
308 tcss->DefineSection(2,73.0,56.9,61.2);
309 tcss->DefineSection(3,73.3,56.9,61.2);
310 //
311 tcss->DefineSection(4,73.3,60.1,61.2);
312 tcss->DefineSection(5,74.0,60.1,61.2);
313 //
314 tcss->DefineSection(6,74.0,60.9,61.2);
315 tcss->DefineSection(7,253.6,65.6,65.9);
316 //
317 tcss->DefineSection(8,253.6,65.6,74.2);
318 tcss->DefineSection(9,258.1,65.6,74.2);
319 //
320 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
321 //-----------------------------------------------
322 // Inner field cage
323 // define 4 parts and make an assembly
324 //-----------------------------------------------
325 // part1 - Al - 2 copies
326 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
327 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
328 // sandwich - outermost parts - 2 copies
329 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
330 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
331 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
332 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
333 //
334 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
335 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
336 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
337 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
338 //
339 // middle parts - 2 copies
340 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
341 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
342 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
343 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
344 //
345 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
346 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
347 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
348 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
349 // central part - 1 copy
350 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
351 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
352 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
353 //
354 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
355 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
356 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
357 //
358 // inner part - positioning
359 //
360 // creating a sandwich
361 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
362 //
363 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
364 //
365 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
366 //
367 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
368 //
369 tv100->AddNode(tv10,1);
370 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
371 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
372 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
373 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
374 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
375 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
376 //
377 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
378 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
379 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
380 v9->AddNode(tv100,1);
381 //
382 // central drum
383 //
384 // flange + sandwich
385 //
386 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
387 cfl->DefineSection(0,-71.1,59.7,61.2);
388 cfl->DefineSection(1,-68.6,59.7,61.2);
389 //
390 cfl->DefineSection(2,-68.6,60.6324,61.2);
391 cfl->DefineSection(3,68.6,60.6324,61.2);
392 //
393 cfl->DefineSection(4,68.6,59.7,61.2);
394 cfl->DefineSection(5,71.1,59.7,61.2);
395 //
396 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
397 // sandwich
398 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
399 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
400 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
401 //
402 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
403 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
404 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
405 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
406 //
407 // seals for central drum 2 copies
408 //
409 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
410 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
411 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
78134e48 412 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
413 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
457e2170 414 //
415 // seal collars
416 TGeoPcon *se = new TGeoPcon(0.,360.,6);
417 se->DefineSection(0,-72.8,59.7,61.2);
418 se->DefineSection(1,-72.3,59.7,61.2);
419 //
420 se->DefineSection(2,-72.3,58.85,61.2);
421 se->DefineSection(3,-71.6,58.85,61.2);
422 //
423 se->DefineSection(4,-71.6,59.7,61.2);
424 se->DefineSection(5,-71.3,59.7,61.2);
425 //
426 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
427 //
428 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
429 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
430 //
431 // define reflection matrix
432 //
433 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
434 //
435 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
436 //
437 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
438 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
439 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
440 //
441 // central membrane - 2 rings and a mylar membrane - assembly
442 //
443 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
444 TGeoTube *oh = new TGeoTube(250.,256.,.5);
445 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
446 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
447 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
448 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
449 //
450 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
451 cm->AddNode(ihv,1);
452 cm->AddNode(ohv,1);
453 cm->AddNode(memv,1);
454 v9->AddNode(cm,1);
455 //
456 // end caps - they are make as an assembly of single segments
457 // containing both readout chambers
458 //
459 Double_t openingAngle = 10.*TMath::DegToRad();
460 Double_t thick=1.5; // rib
461 Double_t shift = thick/TMath::Sin(openingAngle);
462 //
463 Double_t lowEdge = 86.3; // hole in the wheel
464 Double_t upEdge = 240.4; // hole in the wheel
465 //
466 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
467 //
468 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
469 //
470 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
471 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
472 //
473 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
474 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
475 //
476 Double_t ys = shift*TMath::Sin(openingAngle);
477 Double_t xs = shift*TMath::Cos(openingAngle);
478 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
479 tr->RegisterYourself();
480 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
481 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
482 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
483 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
484 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
485 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
486 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
487 //
488 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
489 //
490 // readout chambers
491 //
492 // IROC first
493 //
494 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
495 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
496 // empty space
497 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
498 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
499 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
500 //bars
501 Double_t tga = (19.8328-12.3742)/39.3;
502 Double_t xmin,xmax;
503 xmin = 9.55*tga+12.3742;
504 xmax = 9.95*tga+12.3742;
505 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
506 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
507 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
508 xmin=19.4*tga+12.3742;
509 xmax=19.9*tga+12.3742;
510 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
511 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
512 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
513 xmin=29.35*tga+12.3742;
514 xmax=29.75*tga+12.3742;
515 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
516 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
517 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
518 //
519 // holes for connectors
520 //
521 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
522 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
523 TString fileName(gSystem->Getenv("ALICE_ROOT"));
524 fileName += "/TPC/conn_iroc.dat";
525 ifstream in;
526 in.open(fileName.Data(), ios_base::in); // asci file
527 for(Int_t i =0;i<86;i++){
528 Double_t y = 3.99;
529 Double_t x,z,ang;
530 in>>x>>z>>ang;
531 z-=26.5;
532 TGeoRotation *rrr = new TGeoRotation();
533 rrr->RotateY(ang);
534 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
535 ibdv->AddNode(connv,i+1,trans);
536 }
537 in.close();
538 // "cap"
539 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
540 // "hole"
541 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
542 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
543 tr1->RegisterYourself();
544 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
545 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
546 //
547 // pad plane and wire fixations
548 //
549 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
550 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
551 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
552 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
553 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
554 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
555 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
556 //
557 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
558 //
559 iroc->AddNode(ibdv,1);
560 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
561 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
562 tga =(23.3521-14.5974)/49.65;
563 Double_t xx = 24.825*tga+14.5974-0.6;
564 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
565 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
566 //
567 // OROC
568 //
569 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
570 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
571 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
572 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
573 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
574 //horizontal bars
575 tga=(38.5084-20.2938)/99.3;
576 xmin=tga*10.2+20.2938;
577 xmax=tga*10.6+20.2938;
578 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
579 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
580 //
581 xmin=22.55*tga+20.2938;
582 xmax=24.15*tga+20.2938;
583 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
584 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
585 //
586 xmin=36.1*tga+20.2938;
587 xmax=36.5*tga+20.2938;
588 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
589 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
590 //
591 xmin=49.0*tga+20.2938;
592 xmax=50.6*tga+20.2938;
593 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
594 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
595 //
596 xmin=63.6*tga+20.2938;
597 xmax=64.0*tga+20.2938;
598 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
599 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
600 //
601 xmin=75.5*tga+20.2938;
602 xmax=77.15*tga+20.2938;
603 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
604 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
605 //
606 xmin=88.7*tga+20.2938;
607 xmax=89.1*tga+20.2938;
608 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
609 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
610 //
611 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
612 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
613 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
614 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
615 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
616 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
617 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
618 // vertical bars
619 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
620 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
621 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
622 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
623 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
624 //
625 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
626 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
627 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
628 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
629 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
630 //
631 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
632 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
633 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
634 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
635 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
636 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
637 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
638 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
639 //
640 // holes for connectors
641 //
642 fileName = gSystem->Getenv("ALICE_ROOT");
643 fileName += "/TPC/conn_oroc.dat";
644 in.open(fileName.Data(), ios_base::in); // asci file
645 for(Int_t i =0;i<78;i++){
646 Double_t y =3.89;
647 Double_t x,z,ang;
648 Double_t x1,z1,x2,z2;
649 in>>x>>z>>ang;
650 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
651 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
652 //
653 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
654 //
655 TGeoRotation *rr = new TGeoRotation();
656 rr->RotateY(ang);
657 z1-=54.95;
658 z2-=54.95;
659 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
660 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
661 obdv->AddNode(connv,i+1,trans1);
662 obdv->AddNode(connv,i+79,trans2);
663 }
664 in.close();
665 // cap
666 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
667 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
668 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
669 tr5->RegisterYourself();
670 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
671 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
672 //
673 // pad plane and wire fixations
674 //
675 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
676 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
677 //
678 tga=(43.5239-23.3874)/114.2;
679 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
680 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
681 xx = 57.1*tga+23.3874-0.7;
682 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
683 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
684 //
685 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
686 //
687 oroc->AddNode(obdv,1);
688 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
689 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
690 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
691 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
692 //
693 // now iroc and oroc are placed into a sector...
694 //
695 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
696 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
697 TGeoRotation rot1("rot1",90.,90.,0.);
698 TGeoRotation rot2("rot2");
699 rot2.RotateY(10.);
700 TGeoRotation *rot = new TGeoRotation("rot");
701 *rot=rot1*rot2;
702 //
703 Double_t x0,y0;
704 x0=110.2*TMath::Cos(openingAngle);
705 y0=110.2*TMath::Sin(openingAngle);
20527578 706 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
707 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
457e2170 708 x0=188.45*TMath::Cos(openingAngle);
709 y0=188.45*TMath::Sin(openingAngle);
20527578 710 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
711 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
457e2170 712 //
713 //
714 // A-side
715 //
716 secta->AddNode(ch,1);
717 secta->AddNode(iroc,1,combi1a);
718 secta->AddNode(oroc,1,combi2a);
719 //
720 // C-side
721 //
722 sectc->AddNode(ch,1);
723 sectc->AddNode(iroc,1,combi1c);
724 sectc->AddNode(oroc,1,combi2c);
725 //
726 // now I try to make wheels...
727 //
728 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
729 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
730 //
731 for(Int_t i =0;i<18;i++){
732 Double_t phi = (20.*i);
733 TGeoRotation *r = new TGeoRotation();
734 r->RotateZ(phi);
735 wheela->AddNode(secta,i+1,r);
736 wheelc->AddNode(sectc,i+1,r);
737
738 }
739 // wheels in the drift volume!
740
741 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
742 v9->AddNode(wheela,1,combi3);
743 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
744 //_____________________________________________________________
745 // service support wheel
746 //_____________________________________________________________
747 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
748 sw->DefineSection(0,-4.,80.5,251.75);
749 sw->DefineSection(1,4.,80.5,251.75);
750 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
751 //
752 thick=1.;
753 shift = thick/TMath::Sin(openingAngle);
754 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
755 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
756 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
757 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
758 //
759 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
760 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
761 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
762 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
763 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
764 //
765 shv->AddNode(elv,1);
766 //
767 //
768 ys = shift*TMath::Sin(openingAngle);
769 xs = shift*TMath::Cos(openingAngle);
770 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
771 // cover
772 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
773 co->DefineSection(0,-0.5,77.,255.25);
774 co->DefineSection(1,0.5,77.,255.25);
775 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
776 // hole in a cover
777 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
778 shift=4./TMath::Sin(openingAngle);
779 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
780 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
781 //
782 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
783 //
784 ys = shift*TMath::Sin(openingAngle);
785 xs = shift*TMath::Cos(openingAngle);
786 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
787 //
788 // Sector as an Assembly
789 //
790 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
791 swhs->AddNode(swv,1);
792 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
793 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
794 //
795 // SSW as an Assembly of sectors
796 //
797 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
798 for(Int_t i =0;i<18;i++){
799 Double_t phi = (20.*i);
800 TGeoRotation *r = new TGeoRotation();
801 r->RotateZ(phi);
802 swheel->AddNode(swhs,i+1,r);
803 }
804 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
805 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
806
807 // sensitive strips - strip "0" is always set
808 // conditional
809 Int_t totrows;
810 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
811 Double_t *upar;
812 upar=NULL;
813 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
814 upar=new Double_t [10];
815 upar[0]=0.;
816 upar[1]=360.;
817 upar[2]=18.;
818 upar[3]=2.;
819 //
820 upar[4]=-124.8;
821 upar[7]=124.8;
822
823 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
824
825 upar[5]=rlow;
826 upar[6]=rlow+.01;
827 upar[8]=upar[5];
828 upar[9]=upar[6];
829 //
830 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
831 gGeoManager->Node("TPC_Strip",totrows+1,
832 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
833 //
834 // now, strips optionally
835 //
836 if(fSens){
837 //lower sectors
838 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
839 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
840 upar[5]=rlow;
841 upar[6]=rlow+.01;
842 upar[8]=upar[5];
843 upar[9]=upar[6];
844 gGeoManager->Node("TPC_Strip",i,
845 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
846 gGeoManager->Node("TPC_Strip",totrows+i,
847 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
848 }
849 //upper sectors
850 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
851 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
852 upar[5]=rlow;
853 upar[6]=rlow+.01;
854 upar[8]=upar[5];
855 upar[9]=upar[6];
856 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
857 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
858 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
859 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
860 }
861 }//strips
862 //----------------------------------------------------------
863 // TPc Support Rods - MAKROLON
864 //----------------------------------------------------------
865 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
866 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
78134e48 867 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
868 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");
869 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
457e2170 870 // upper and lower rods differ in length!
871 delete [] upar;
872 upar=NULL;
873 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
874 upar=new Double_t [3];
875 upar[0]=1.8;
876 upar[1]=2.2;
877
878 //
879 //HV rods - makrolon + 0.58cm (diameter) Cu
880 TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
881 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
882 //
883 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
884 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
885 hvrv->AddNode(hvcv,1);
78134e48 886 //
887 // resistor rods
888 //
889 TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner
890 TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer
891 TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
892 TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
893 //
894 TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
895 TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);
896 TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
897 TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);
898 //
899 // ceramic rod with water
900 //
901 criv->AddNode(cwiv,1);
902 crov->AddNode(cwov,1);
903 //
904 TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner
905 TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer
906 //
907 // peek rod
908 //
909 TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
910 TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12);
911 //
912 // resistor rods assembly
913 //
be53328e 914 TGeoRotation *rotr = new TGeoRotation("rotr");
915 rotr->RotateZ(-21.);
78134e48 916 //
917 TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
918 TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
919 //
920 TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
921 TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);
922 //
a3d2be59 923 TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
924 TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
925 rrin->AddNode(rriv,1);
926 rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
927 rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.));
928 rrin->AddNode(priv,1);
929 //
930 rrou->AddNode(rrov,1);
931 rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
932 rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.));
933 rrou->AddNode(prov,1);
457e2170 934 for(Int_t i=0;i<18;i++){
935 Double_t angle,x,y;
936 Double_t z,r;
937 angle=TMath::DegToRad()*20.*(Double_t)i;
938 r=81.5;
939 x=r * TMath::Cos(angle);
940 y=r * TMath::Sin(angle);
941 upar[2]=126.64; //lower
942 z= 126.96;
78134e48 943 //
944 if(i==3){
be53328e 945 v9->AddNode(rrin,1,new TGeoCombiTrans(x,y,z,rotr)); //A
946 v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
78134e48 947 }
948 else {
949 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
950 gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
457e2170 951 }
78134e48 952
953
954 //
457e2170 955 r=254.25;
956 x=r * TMath::Cos(angle);
957 y=r * TMath::Sin(angle);
958 upar[2]=126.54; //upper
959 z=127.06;
78134e48 960 if(i==15){
39ae7605 961 //v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
962 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,127.14));//A-side only
78134e48 963 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
964 }
965 else if(i==11){
be53328e 966 v9->AddNode(rrou,1,new TGeoCombiTrans(x,y,z,rotr)); //A
967 v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
78134e48 968 }
969 else{
970 //
971 gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
972 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
973 }
457e2170 974 }
975
976 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
977 alice->AddNode(v1,1);
978
979} // end of function
980
981//_____________________________________________________________________________
982void AliTPCv4::AddAlignableVolumes() const
983{
984 //
985 // Create entries for alignable volumes associating the symbolic volume
986 // name with the corresponding volume path. Needs to be syncronized with
987 // eventual changes in the geometry.
988 //
989 SetInnerChambersAlignable();
990 SetOuterChambersAlignable();
991}
992
993//_____________________________________________________________________________
994void AliTPCv4::SetInnerChambersAlignable() const
995{
996 //
997 Int_t modnum = 0;
998 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
999 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1000 TString vpappend = "/TPC_IROC_1";
1001 TString snstr1="TPC/EndcapA/Sector";
1002 TString snstr2="TPC/EndcapC/Sector";
1003 TString snappend="/InnerChamber";
1004 TString volpath, symname;
1005
1006 for(Int_t cnt=1; cnt<=18; cnt++){
1007 volpath = vpstr1;
1008 volpath += cnt;
1009 volpath += vpappend;
1010 symname = snstr1;
1011 symname += cnt;
1012 symname += snappend;
1013 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
1014 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1015 //
1016 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntry(symname.Data());
1017 const char *path = alignableEntry->GetTitle();
1018 if (!gGeoManager->cd(path))
1019 AliFatal(Form("Volume path %s not valid!",path));
1020 TGeoHMatrix* globMatrix = gGeoManager->GetCurrentMatrix();
1021 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
1022 alignableEntry->SetMatrix(matTtoL);
1023 modnum++;
1024 }
1025
1026 for(Int_t cnt=1; cnt<=18; cnt++){
1027 volpath = vpstr2;
1028 volpath += cnt;
1029 volpath += vpappend;
1030 symname = snstr2;
1031 symname += cnt;
1032 symname += snappend;
1033 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
1034 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1035 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntry(symname.Data());
1036 const char *path = alignableEntry->GetTitle();
1037 if (!gGeoManager->cd(path))
1038 AliFatal(Form("Volume path %s not valid!",path));
1039 TGeoHMatrix* globMatrix = gGeoManager->GetCurrentMatrix();
1040 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
1041 alignableEntry->SetMatrix(matTtoL);
1042 modnum++;
1043 }
1044}
1045
1046//_____________________________________________________________________________
1047void AliTPCv4::SetOuterChambersAlignable() const
1048{
1049 //
1050 Int_t modnum = 0;
1051 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1052 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1053 TString vpappend = "/TPC_OROC_1";
1054 TString snstr1="TPC/EndcapA/Sector";
1055 TString snstr2="TPC/EndcapC/Sector";
1056 TString snappend="/OuterChamber";
1057 TString volpath, symname;
1058
1059 for(Int_t cnt=1; cnt<=18; cnt++){
1060 volpath = vpstr1;
1061 volpath += cnt;
1062 volpath += vpappend;
1063 symname = snstr1;
1064 symname += cnt;
1065 symname += snappend;
1066 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
1067 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1068 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntry(symname.Data());
1069 const char *path = alignableEntry->GetTitle();
1070 if (!gGeoManager->cd(path))
1071 AliFatal(Form("Volume path %s not valid!",path));
1072 TGeoHMatrix* globMatrix = gGeoManager->GetCurrentMatrix();
1073 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
1074 alignableEntry->SetMatrix(matTtoL);
1075 modnum++;
1076 }
1077
1078 for(Int_t cnt=1; cnt<=18; cnt++){
1079 volpath = vpstr2;
1080 volpath += cnt;
1081 volpath += vpappend;
1082 symname = snstr2;
1083 symname += cnt;
1084 symname += snappend;
1085 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
1086 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1087 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntry(symname.Data());
1088 const char *path = alignableEntry->GetTitle();
1089 if (!gGeoManager->cd(path))
1090 AliFatal(Form("Volume path %s not valid!",path));
1091 TGeoHMatrix* globMatrix = gGeoManager->GetCurrentMatrix();
1092 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
1093 alignableEntry->SetMatrix(matTtoL);
1094 modnum++;
1095 }
1096}
1097
457e2170 1098
1099//_____________________________________________________________________________
1100void AliTPCv4::CreateMaterials()
1101{
1102 //
1103 // Define materials for version 2 of the Time Projection Chamber
1104 //
1105
1106 AliTPC::CreateMaterials();
1107}
1108
1109//_____________________________________________________________________________
1110void AliTPCv4::Init()
1111{
1112 //
1113 // Initialises version 2 of the TPC after that it has been built
1114 //
1115
8d888a91 1116 //Int_t *idtmed = fIdtmed->GetArray();
457e2170 1117
1118 AliTPC::Init();
1119
1120
1121 fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected...
1122
1123 fIDrift=gMC->VolId("TPC_Drift");
1124 fSecOld=-100; // fake number
1125
d9888f70 1126 gMC->SetMaxNStep(-30000); // max. number of steps increased
457e2170 1127
098dfc1a 1128 // specific energy loss set in galice.cuts
457e2170 1129
1130 AliInfo("*** TPC version 4 initialized ***");
1131 AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
1132
1133 //
1134
1135}
1136
1137//_____________________________________________________________________________
1138void AliTPCv4::StepManager()
1139{
1140 //
1141 // Called for every step in the Time Projection Chamber
1142 //
1143
1144 //
1145 // parameters used for the energy loss calculations
1146 //
1147 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1148 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1149 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1150
1151
1152 const Float_t kbig = 1.e10;
1153
1154 Int_t id,copy;
1155 Float_t hits[5];
1156 Int_t vol[2];
1157 TLorentzVector p;
1158
1159 vol[1]=0; // preset row number to 0
1160 //
1161 gMC->SetMaxStep(kbig);
1162
1163
1164
1165 Float_t charge = gMC->TrackCharge();
1166
1167 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1168
1169 // check the sensitive volume
1170
1171 id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1172 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
1173
1174 gMC->TrackPosition(p);
1175 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1176 //
1177
1178 //
1179 Double_t angle = TMath::ACos(p[0]/r);
1180 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1181 //
1182 // angular segment, it is not a real sector number...
1183 //
1184 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1185 fTPCParam->GetInnerAngle());
1186 // rotate to segment "0"
1187 Float_t cos,sin;
1188 fTPCParam->AdjustCosSin(sector,cos,sin);
1189 Float_t x1=p[0]*cos + p[1]*sin;
1190 // check if within sector's limits
5bd5dbc4 1191 if((x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp())
1192 ||(x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp())){
457e2170 1193 // calculate real sector number...
1194 if (x1>fTPCParam->GetOuterRadiusLow()){
1195 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1196 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1197 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
1198 }
1199 else
1200 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1201 //
1202 // here I have a sector number
1203 //
1204
1205 vol[0]=sector;
1206 // check if change of sector
1207 if(sector != fSecOld){
1208 fSecOld=sector;
1209 // add track reference
20527578 1210 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
457e2170 1211 }
1212 // track is in the sensitive strip
1213 if(id == fIdSens){
1214 // track is entering the strip
1215 if (gMC->IsTrackEntering()){
1216 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1217 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1218 // row numbers are autonomous for lower and upper sectors
1219 if(vol[0] > fTPCParam->GetNInnerSector()) {
1220 vol[1] -= fTPCParam->GetNRowLow();
1221 }
1222 //
1223 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
1224
1225 // lower sector, row 0, because Jouri wants to have this
1226
1227 gMC->TrackMomentum(p);
1228 hits[0]=p[0];
1229 hits[1]=p[1];
1230 hits[2]=p[2];
1231 hits[3]=0.; // this hit has no energy loss
1232 // Get also the track time for pileup simulation
1233 hits[4]=gMC->TrackTime();
1234
1235 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1236 }
1237 //
1238
1239 gMC->TrackPosition(p);
1240 hits[0]=p[0];
1241 hits[1]=p[1];
1242 hits[2]=p[2];
1243 hits[3]=0.; // this hit has no energy loss
1244 // Get also the track time for pileup simulation
1245 hits[4]=gMC->TrackTime();
1246
1247 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1248
1249 }
1250 else return;
1251 }
1252 //-----------------------------------------------------------------
1253 // charged particle is in the sensitive drift volume
1254 //-----------------------------------------------------------------
1255
1256 if(gMC->TrackStep() > 0){
1257
1258 Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
20527578 1259 nel=TMath::Min(nel,30); // 30 electrons corresponds to 1 keV
457e2170 1260 //
1261 gMC->TrackPosition(p);
1262 hits[0]=p[0];
1263 hits[1]=p[1];
1264 hits[2]=p[2];
1265 hits[3]=(Float_t)nel;
1266
1267 // Add this hit
1268
1269 if (fHitType&&2){
1270 gMC->TrackMomentum(p);
1271 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1272 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
1273 fTrackHits->SetHitPrecision(precision);
1274 }
1275
1276 // Get also the track time for pileup simulation
1277 hits[4]=gMC->TrackTime();
1278
1279 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1280
1281 } // step>0
1282 } //within sector's limits
1283 // Stemax calculation for the next step
1284 if(!gMC->IsTrackAlive()) return; // particle has disappeared
1285 Float_t pp;
1286 TLorentzVector mom;
1287 gMC->TrackMomentum(mom);
1288 Float_t ptot=mom.Rho();
1289 Float_t betaGamma = ptot/gMC->TrackMass();
1290
1291 Int_t pid=gMC->TrackPid();
1292 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1293 {
1294 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1295 }
1296 else
1297 {
1298
1299 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
b40afa5e 1300 pp=kprim*AliMathBase::BetheBlochAleph(betaGamma);
457e2170 1301
1302 if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1303 }
1304
1305 Double_t rnd = gMC->GetRandom()->Rndm();
1306
1307 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1308
1309
1310}
1311