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4c039060 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
88cb7938 16/* $Id$ */
4c039060 17
73042f01 18//
fe4da5cc 19///////////////////////////////////////////////////////////////////////////////
20// //
21// Time Projection Chamber version 2 -- detailed TPC and slow simulation //
22// //
23//Begin_Html
24/*
1439f98e 25<img src="picts/AliTPCv2Class.gif">
fe4da5cc 26*/
27//End_Html
28// //
29// //
30///////////////////////////////////////////////////////////////////////////////
116cbefd 31
d899e254 32//#include <stdlib.h>
fe4da5cc 33
88cb7938 34#include <TLorentzVector.h>
116cbefd 35#include <TPDGCode.h>
d9e80aca 36#include <TString.h>
f77f13c8 37#include "AliLog.h"
73042f01 38#include "AliTPCParam.h"
4ed5dced 39#include "AliTPCTrackHitsV2.h"
116cbefd 40#include "AliTPCv2.h"
c1637e41 41#include "TGeoVolume.h"
42#include "TGeoPcon.h"
43#include "TGeoTube.h"
44#include "TGeoPgon.h"
45#include "TGeoTrd1.h"
46#include "TGeoCompositeShape.h"
47#include "TGeoPara.h"
48ClassImp(AliTPCv2)
49
50//_____________________________________________________________________________
51AliTPCv2::AliTPCv2(const char *name, const char *title) :
e046d791 52 AliTPC(name, title),
53 fIdSens(0),
54 fIDrift(0),
55 fSecOld(0)
c1637e41 56{
57 //
58 // Standard constructor for Time Projection Chamber version 2
59 //
6a905708 60
37831078 61
c1637e41 62 SetBufferSize(128000);
79575d04 63
79575d04 64
c1637e41 65 if (fTPCParam)
66 fTPCParam->Write(fTPCParam->GetTitle());
67}
68
69//_____________________________________________________________________________
70void AliTPCv2::CreateGeometry()
71{
72 //
73 // Create the geometry of Time Projection Chamber version 2
74 //
75 //Begin_Html
76 /*
77 <img src="picts/AliTPC.gif">
78 */
79 //End_Html
80 //Begin_Html
81 /*
82 <img src="picts/AliTPCv2Tree.gif">
83 */
84 //End_Html
37831078 85
86 //----------------------------------------------------------
c1637e41 87 // This geometry is written using TGeo class
88 // Firstly the shapes are defined, and only then the volumes
89 // What is recognized by the MC are volumes
37831078 90 //----------------------------------------------------------
c1637e41 91 //
92 // tpc - this will be the mother volume
93 //
37831078 94
c1637e41 95 //
96 // here I define a volume TPC
97 // retrive the medium name with "TPC_" as a leading string
98 //
99 TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
100 tpc->DefineSection(0,-290.,77.,278.);
456cb019 101 tpc->DefineSection(1,-259.6,70.,278.);
c1637e41 102 //
103 tpc->DefineSection(2,-259.6,68.1,278.);
104 tpc->DefineSection(3,-253.6,68.1,278.);
105 //
106 tpc->DefineSection(4,-253.6,68.,278.);
107 tpc->DefineSection(5,-74.0,60.8,278.);
108 //
109 tpc->DefineSection(6,-74.0,60.1,278.);
110 tpc->DefineSection(7,-73.3,60.1,278.);
111 //
112 tpc->DefineSection(8,-73.3,56.9,278.);
113 tpc->DefineSection(9,73.3,56.9,278.);
114 //
115 tpc->DefineSection(10,73.3,60.1,278.);
116 tpc->DefineSection(11,74.0,60.1,278.);
117 //
118 tpc->DefineSection(12,74.0,60.8,278.);
119 tpc->DefineSection(13,253.6,65.5,278.);
120 //
121 tpc->DefineSection(14,253.6,65.6,278.);
122 tpc->DefineSection(15,259.6,65.6,278.);
123 //
456cb019 124 tpc->DefineSection(16,259.6,70.0,278.);
c1637e41 125 tpc->DefineSection(17,290.,77.,278.);
126 //
127 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
128 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
129 //
130 // drift volume - sensitive volume, extended beyond the
131 // endcaps, because of the alignment
132 //
133 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
134 dvol->DefineSection(0,-260.,74.5,264.4);
135 dvol->DefineSection(1,-253.6,74.5,264.4);
136 //
137 dvol->DefineSection(2,-253.6,76.6774,258.);
138 dvol->DefineSection(3,253.6,76.6774,258.);
139 //
140 dvol->DefineSection(4,253.6,74.5,264.4);
141 dvol->DefineSection(5,260.,74.5,264.4);
142 //
143 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
144 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
145 //
146 v1->AddNode(v9,1);
147 //
148 // outer insulator
149 //
150 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
151 //
152 tpco->DefineSection(0,-256.6,264.8,278.);
153 tpco->DefineSection(1,-253.6,264.8,278.);
154 //
155 tpco->DefineSection(2,-253.6,258.,278.);
156 tpco->DefineSection(3,250.6,258.,278.);
157 //
158 tpco->DefineSection(4,250.6,258.,275.5);
159 tpco->DefineSection(5,253.6,258.,275.5);
160 //
161 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
162 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
163 //
164 // outer containment vessel
165 //
166 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
167 //
168 tocv->DefineSection(0,-256.6,264.8,278.);
169 tocv->DefineSection(1,-253.6,264.8,278.);
170 //
171 tocv->DefineSection(2,-253.6,274.8124,278.);
172 tocv->DefineSection(3,247.6,274.8124,278.);
173 //
174 tocv->DefineSection(4,247.6,270.4,278.);
175 tocv->DefineSection(5,250.6,270.4,278.);
176 //
177 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
178 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
179 //
180 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
181 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
182 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
183 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
184 //
185 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
186 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
187 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
188 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
189 //
190 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
191 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
192 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
193 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
194 //-------------------------------------------------------
195 // Tpc Outer Field Cage
196 // daughters - composite (sandwich)
197 //-------------------------------------------------------
37831078 198
c1637e41 199 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
200 //
201 tofc->DefineSection(0,-253.6,258.,269.6);
202 tofc->DefineSection(1,-250.6,258.,269.6);
203 //
204 tofc->DefineSection(2,-250.6,258.,260.0676);
205 tofc->DefineSection(3,250.6,258.,260.0676);
206 //
207 tofc->DefineSection(4,250.6,258.,275.5);
208 tofc->DefineSection(5,253.6,258.,275.5);
209 //
210 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
211 //sandwich
212 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
213 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
214 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
215 //
216 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
217 //
218 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
219 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
220 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
221 //
222 // outer part - positioning
223 //
224 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
225 //
226 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
227 //
456cb019 228 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
c1637e41 229 //
230 v2->AddNode(v3,1); v2->AddNode(v4,1);
231 //
232 v1->AddNode(v2,1);
233 //--------------------------------------------------------------------
234 // Tpc Inner INsulator (CO2)
235 // the cones, the central drum and the inner f.c. sandwich with a piece
236 // of the flane will be placed in the TPC
237 //--------------------------------------------------------------------
238 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
239 //
240 tpci->DefineSection(0,-253.6,68.4,76.6774);
241 tpci->DefineSection(1,-74.0,61.2,76.6774);
242 //
243 tpci->DefineSection(2,74.0,61.2,76.6774);
244 //
245 tpci->DefineSection(3,253.6,65.9,76.6774);
246 //
247 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
248 //
249 // now the inner field cage - only part of flanges (2 copies)
250 //
251 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
252 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
253 //
254 //---------------------------------------------------------
255 // Tpc Inner Containment vessel - Muon side
256 //---------------------------------------------------------
257 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
258 //
259 tcms->DefineSection(0,-259.1,68.1,74.2);
260 tcms->DefineSection(1,-253.6,68.1,74.2);
261 //
262 tcms->DefineSection(2,-253.6,68.1,68.4);
263 tcms->DefineSection(3,-74.0,60.9,61.2);
264 //
265 tcms->DefineSection(4,-74.0,60.1,61.2);
266 tcms->DefineSection(5,-73.3,60.1,61.2);
267 //
268 tcms->DefineSection(6,-73.3,56.9,61.2);
269 tcms->DefineSection(7,-73.0,56.9,61.2);
270 //
271 tcms->DefineSection(8,-73.0,56.9,58.8);
272 tcms->DefineSection(9,-71.3,56.9,58.8);
273 //
274 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
275 //-----------------------------------------------
276 // inner containment vessel - shaft side
277 //-----------------------------------------------
278 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
279 //
280 tcss->DefineSection(0,71.3,56.9,58.8);
281 tcss->DefineSection(1,73.0,56.9,58.8);
282 //
283 tcss->DefineSection(2,73.0,56.9,61.2);
284 tcss->DefineSection(3,73.3,56.9,61.2);
285 //
286 tcss->DefineSection(4,73.3,60.1,61.2);
287 tcss->DefineSection(5,74.0,60.1,61.2);
288 //
289 tcss->DefineSection(6,74.0,60.9,61.2);
290 tcss->DefineSection(7,253.6,65.6,65.9);
291 //
292 tcss->DefineSection(8,253.6,65.6,74.2);
293 tcss->DefineSection(9,258.1,65.6,74.2);
294 //
295 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
296 //-----------------------------------------------
297 // Inner field cage
298 // define 4 parts and make an assembly
299 //-----------------------------------------------
300 // part1 - Al - 2 copies
301 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
302 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
303 // sandwich - outermost parts - 2 copies
304 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
305 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
306 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
307 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
308 //
309 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
310 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
311 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
312 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
313 //
314 // middle parts - 2 copies
315 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
316 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
317 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
318 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
319 //
320 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
321 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
322 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
323 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
324 // central part - 1 copy
325 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
326 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
327 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
328 //
329 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
330 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
331 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
332 //
333 // inner part - positioning
334 //
335 // creating a sandwich
336 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
337 //
338 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
339 //
340 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
341 //
342 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
343 //
344 tv100->AddNode(tv10,1);
345 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
346 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
347 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
348 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
349 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
350 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
351 //
352 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
353 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
354 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
355 v9->AddNode(tv100,1);
356 //
357 // central drum
358 //
359 // flange + sandwich
360 //
361 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
362 cfl->DefineSection(0,-71.1,59.7,61.2);
363 cfl->DefineSection(1,-68.6,59.7,61.2);
364 //
365 cfl->DefineSection(2,-68.6,60.6324,61.2);
366 cfl->DefineSection(3,68.6,60.6324,61.2);
367 //
368 cfl->DefineSection(4,68.6,59.7,61.2);
369 cfl->DefineSection(5,71.1,59.7,61.2);
370 //
371 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
372 // sandwich
373 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
374 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
375 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
376 //
377 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
378 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
379 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
380 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
381 //
382 // seals for central drum 2 copies
383 //
384 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
385 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
386 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
387 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.));
388 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.));
389 //
390 // seal collars
391 TGeoPcon *se = new TGeoPcon(0.,360.,6);
392 se->DefineSection(0,-72.8,59.7,61.2);
393 se->DefineSection(1,-72.3,59.7,61.2);
394 //
395 se->DefineSection(2,-72.3,58.85,61.2);
396 se->DefineSection(3,-71.6,58.85,61.2);
397 //
398 se->DefineSection(4,-71.6,59.7,61.2);
399 se->DefineSection(5,-71.3,59.7,61.2);
400 //
401 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
402 //
403 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
404 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
405 //
406 // define reflection matrix
407 //
4fa47888 408 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
c1637e41 409 //
410 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
411 //
a1ec4d07 412 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
413 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
c1637e41 414 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
415 //
416 // central membrane - 2 rings and a mylar membrane - assembly
417 //
418 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
419 TGeoTube *oh = new TGeoTube(250.,256.,.5);
420 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
421 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
422 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
423 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
424 //
425 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
426 cm->AddNode(ihv,1);
427 cm->AddNode(ohv,1);
428 cm->AddNode(memv,1);
429 v9->AddNode(cm,1);
430 //
431 // end caps - they are make as an assembly of single segments
432 // containing both readout chambers
433 //
d899e254 434 Double_t openingAngle = 10.*TMath::DegToRad();
c1637e41 435 Double_t thick=1.5; // rib
d899e254 436 Double_t shift = thick/TMath::Sin(openingAngle);
c1637e41 437 //
d899e254 438 Double_t lowEdge = 86.3; // hole in the wheel
439 Double_t upEdge = 240.4; // hole in the wheel
c1637e41 440 //
441 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
442 //
443 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
444 //
d899e254 445 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
446 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
c1637e41 447 //
d899e254 448 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
449 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
c1637e41 450 //
d899e254 451 Double_t ys = shift*TMath::Sin(openingAngle);
452 Double_t xs = shift*TMath::Cos(openingAngle);
c1637e41 453 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
454 tr->RegisterYourself();
455 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
456 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
457 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
458 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
459 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
460 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
461 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
462 //
463 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
464 //
465 // readout chambers
466 //
467 // IROC first
468 //
469 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
470 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
471 // empty space
472 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
473 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
474 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
475 //bars
476 Double_t tga = (19.8328-12.3742)/39.3;
477 Double_t xmin,xmax;
478 xmin = 9.55*tga+12.3742;
479 xmax = 9.95*tga+12.3742;
480 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
481 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
482 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
483 xmin=19.4*tga+12.3742;
484 xmax=19.9*tga+12.3742;
485 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
486 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
487 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
488 xmin=29.35*tga+12.3742;
489 xmax=29.75*tga+12.3742;
490 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
491 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
492 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
493 //
494 // holes for connectors
495 //
496 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
497 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
d9e80aca 498 TString fileName(gSystem->Getenv("ALICE_ROOT"));
499 fileName += "/TPC/conn_iroc.dat";
c1637e41 500 ifstream in;
d9e80aca 501 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 502 for(Int_t i =0;i<86;i++){
456cb019 503 Double_t y = 3.99;
c1637e41 504 Double_t x,z,ang;
505 in>>x>>z>>ang;
456cb019 506 z-=26.5;
c1637e41 507 TGeoRotation *rrr = new TGeoRotation();
508 rrr->RotateY(ang);
509 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
510 ibdv->AddNode(connv,i+1,trans);
511 }
512 in.close();
513 // "cap"
514 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
515 // "hole"
516 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
517 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
518 tr1->RegisterYourself();
519 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
520 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
521 //
522 // pad plane and wire fixations
523 //
524 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
525 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
526 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
527 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
528 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
529 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
530 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
531 //
532 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
533 //
534 iroc->AddNode(ibdv,1);
535 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
536 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
537 tga =(23.3521-14.5974)/49.65;
538 Double_t xx = 24.825*tga+14.5974-0.6;
539 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
540 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
541 //
542 // OROC
543 //
544 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
545 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
546 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
547 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
548 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
549 //horizontal bars
550 tga=(38.5084-20.2938)/99.3;
551 xmin=tga*10.2+20.2938;
552 xmax=tga*10.6+20.2938;
553 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
554 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
555 //
556 xmin=22.55*tga+20.2938;
557 xmax=24.15*tga+20.2938;
558 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
559 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
560 //
561 xmin=36.1*tga+20.2938;
562 xmax=36.5*tga+20.2938;
563 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
564 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
565 //
566 xmin=49.0*tga+20.2938;
567 xmax=50.6*tga+20.2938;
568 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
569 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
570 //
571 xmin=63.6*tga+20.2938;
572 xmax=64.0*tga+20.2938;
573 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
574 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
575 //
576 xmin=75.5*tga+20.2938;
577 xmax=77.15*tga+20.2938;
578 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
579 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
580 //
581 xmin=88.7*tga+20.2938;
582 xmax=89.1*tga+20.2938;
583 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
584 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
585 //
586 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
587 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
588 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
589 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
590 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
591 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
592 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
593 // vertical bars
594 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
595 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
596 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
597 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
598 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
599 //
600 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
601 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
602 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
603 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
604 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
605 //
606 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
607 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
608 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
609 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
610 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
611 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
612 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
613 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
614 //
615 // holes for connectors
616 //
d9e80aca 617 fileName = gSystem->Getenv("ALICE_ROOT");
618 fileName += "/TPC/conn_oroc.dat";
619 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 620 for(Int_t i =0;i<78;i++){
621 Double_t y =3.89;
622 Double_t x,z,ang;
623 Double_t x1,z1,x2,z2;
624 in>>x>>z>>ang;
625 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
626 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
627 //
628 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
629 //
630 TGeoRotation *rr = new TGeoRotation();
631 rr->RotateY(ang);
632 z1-=54.95;
633 z2-=54.95;
634 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
635 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
636 obdv->AddNode(connv,i+1,trans1);
637 obdv->AddNode(connv,i+79,trans2);
638 }
639 in.close();
640 // cap
641 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
642 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
643 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
644 tr5->RegisterYourself();
645 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
646 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
647 //
648 // pad plane and wire fixations
649 //
650 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
651 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
652 //
653 tga=(43.5239-23.3874)/114.2;
654 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
655 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
656 xx = 57.1*tga+23.3874-0.7;
657 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
658 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
659 //
660 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
661 //
662 oroc->AddNode(obdv,1);
663 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
664 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
665 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
666 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
667 //
668 // now iroc and oroc are placed into a sector...
669 //
a1ec4d07 670 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
671 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
c1637e41 672 TGeoRotation rot1("rot1",90.,90.,0.);
673 TGeoRotation rot2("rot2");
674 rot2.RotateY(10.);
675 TGeoRotation *rot = new TGeoRotation("rot");
676 *rot=rot1*rot2;
677 //
678 Double_t x0,y0;
d899e254 679 x0=110.2*TMath::Cos(openingAngle);
680 y0=110.2*TMath::Sin(openingAngle);
a1ec4d07 681 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //a-side
682 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //c-side
d899e254 683 x0=188.45*TMath::Cos(openingAngle);
684 y0=188.45*TMath::Sin(openingAngle);
a1ec4d07 685 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //a-side
686 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //c-side
c1637e41 687 //
c1637e41 688 //
a1ec4d07 689 // A-side
c1637e41 690 //
a1ec4d07 691 secta->AddNode(ch,1);
692 secta->AddNode(iroc,1,combi1a);
693 secta->AddNode(oroc,1,combi2a);
694 //
695 // C-side
696 //
697 sectc->AddNode(ch,1);
698 sectc->AddNode(iroc,1,combi1c);
699 sectc->AddNode(oroc,1,combi2c);
700 //
701 // now I try to make wheels...
702 //
703 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
704 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
c1637e41 705 //
706 for(Int_t i =0;i<18;i++){
707 Double_t phi = (20.*i);
708 TGeoRotation *r = new TGeoRotation();
709 r->RotateZ(phi);
a1ec4d07 710 wheela->AddNode(secta,i+1,r);
711 wheelc->AddNode(sectc,i+1,r);
79575d04 712
c1637e41 713 }
4fa47888 714 // wheels in the drift volume!
a1ec4d07 715
c1637e41 716 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
a1ec4d07 717 v9->AddNode(wheela,1,combi3);
718 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
c1637e41 719 //_____________________________________________________________
720 // service support wheel
721 //_____________________________________________________________
722 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
723 sw->DefineSection(0,-4.,80.5,251.75);
724 sw->DefineSection(1,4.,80.5,251.75);
725 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
726 //
727 thick=1.;
d899e254 728 shift = thick/TMath::Sin(openingAngle);
c1637e41 729 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
730 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
731 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
732 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
733 //
74518339 734 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
735 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
736 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
737 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
738 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
739 //
740 shv->AddNode(elv,1);
741 //
742 //
d899e254 743 ys = shift*TMath::Sin(openingAngle);
744 xs = shift*TMath::Cos(openingAngle);
c1637e41 745 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
746 // cover
747 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
748 co->DefineSection(0,-0.5,77.,255.25);
749 co->DefineSection(1,0.5,77.,255.25);
750 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
751 // hole in a cover
752 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
d899e254 753 shift=4./TMath::Sin(openingAngle);
c1637e41 754 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
755 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
756 //
757 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
758 //
d899e254 759 ys = shift*TMath::Sin(openingAngle);
760 xs = shift*TMath::Cos(openingAngle);
c1637e41 761 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
762 //
763 // Sector as an Assembly
764 //
765 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
766 swhs->AddNode(swv,1);
767 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
768 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
769 //
770 // SSW as an Assembly of sectors
771 //
772 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
773 for(Int_t i =0;i<18;i++){
774 Double_t phi = (20.*i);
775 TGeoRotation *r = new TGeoRotation();
776 r->RotateZ(phi);
777 swheel->AddNode(swhs,i+1,r);
778 }
779 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
780 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
781
782 // sensitive strips - strip "0" is always set
783 // conditional
784 Int_t totrows;
785 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
786 Double_t *upar;
787 upar=NULL;
788 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
789 upar=new Double_t [10];
790 upar[0]=0.;
791 upar[1]=360.;
792 upar[2]=18.;
793 upar[3]=2.;
794 //
795 upar[4]=-124.8;
796 upar[7]=124.8;
797
798 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
799
800 upar[5]=rlow;
801 upar[6]=rlow+.01;
802 upar[8]=upar[5];
803 upar[9]=upar[6];
804 //
805 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
806 gGeoManager->Node("TPC_Strip",totrows+1,
807 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
808 //
809 // now, strips optionally
810 //
811 if(fSens){
812 //lower sectors
813 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
814 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
815 upar[5]=rlow;
816 upar[6]=rlow+.01;
817 upar[8]=upar[5];
818 upar[9]=upar[6];
819 gGeoManager->Node("TPC_Strip",i,
820 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
821 gGeoManager->Node("TPC_Strip",totrows+i,
822 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
823 }
824 //upper sectors
825 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
826 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
827 upar[5]=rlow;
828 upar[6]=rlow+.01;
829 upar[8]=upar[5];
830 upar[9]=upar[6];
831 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
832 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
833 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
834 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
835 }
836 }//strips
37831078 837 //----------------------------------------------------------
c1637e41 838 // TPc Support Rods - MAKROLON
37831078 839 //----------------------------------------------------------
c1637e41 840 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
841 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
842 // upper and lower rods differ in length!
843 delete [] upar;
844 upar=NULL;
845 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
846 upar=new Double_t [3];
847 upar[0]=1.8;
848 upar[1]=2.2;
849
79575d04 850 //
c1637e41 851 //HV rods - makrolon + 0.58cm (diameter) Cu
ae4806ca 852 TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
c1637e41 853 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
854 //
855 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
856 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
857 hvrv->AddNode(hvcv,1);
858
7281dc07 859 for(Int_t i=0;i<18;i++){
c1637e41 860 Double_t angle,x,y;
861 Double_t z,r;
862 angle=TMath::DegToRad()*20.*(Double_t)i;
863 r=81.5;
864 x=r * TMath::Cos(angle);
865 y=r * TMath::Sin(angle);
866 upar[2]=126.64; //lower
867 z= 126.96;
868 if(i==15){
869 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
870 v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
871 }
872 else{
873 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
0079eac0 874 gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
c1637e41 875 }
876 r=254.25;
877 x=r * TMath::Cos(angle);
878 y=r * TMath::Sin(angle);
879 upar[2]=126.54; //upper
880 z=127.06;
0079eac0 881 gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
882 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
c1637e41 883 }
79575d04 884
bde68ab0 885 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
886 alice->AddNode(v1,1);
c1637e41 887
37831078 888} // end of function
889
ac81c411 890//_____________________________________________________________________________
891void AliTPCv2::AddAlignableVolumes() const
892{
893 //
894 // Create entries for alignable volumes associating the symbolic volume
895 // name with the corresponding volume path. Needs to be syncronized with
896 // eventual changes in the geometry.
897 //
898 SetInnerChambersAlignable();
899 SetOuterChambersAlignable();
900}
901
902//_____________________________________________________________________________
903void AliTPCv2::SetInnerChambersAlignable() const
904{
905 //
906 Int_t modnum = 0;
d899e254 907 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
908 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
909 TString vpappend = "/TPC_IROC_1";
910 TString snstr1="TPC/EndcapA/Sector";
911 TString snstr2="TPC/EndcapC/Sector";
912 TString snappend="/InnerChamber";
ac81c411 913 TString volpath, symname;
914
65293f49 915 for(Int_t cnt=1; cnt<=18; cnt++){
d899e254 916 volpath = vpstr1;
65293f49 917 volpath += cnt;
d899e254 918 volpath += vpappend;
919 symname = snstr1;
65293f49 920 symname += cnt;
d899e254 921 symname += snappend;
84cbbd90 922 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
923 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
65293f49 924 modnum++;
925 }
65293f49 926
ac81c411 927 for(Int_t cnt=1; cnt<=18; cnt++){
d899e254 928 volpath = vpstr2;
ac81c411 929 volpath += cnt;
d899e254 930 volpath += vpappend;
931 symname = snstr2;
ac81c411 932 symname += cnt;
d899e254 933 symname += snappend;
84cbbd90 934 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
935 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
ac81c411 936 modnum++;
937 }
938}
939
ac81c411 940//_____________________________________________________________________________
941void AliTPCv2::SetOuterChambersAlignable() const
942{
943 //
944 Int_t modnum = 0;
d899e254 945 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
946 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
947 TString vpappend = "/TPC_OROC_1";
948 TString snstr1="TPC/EndcapA/Sector";
949 TString snstr2="TPC/EndcapC/Sector";
950 TString snappend="/OuterChamber";
ac81c411 951 TString volpath, symname;
952
953 for(Int_t cnt=1; cnt<=18; cnt++){
d899e254 954 volpath = vpstr1;
ac81c411 955 volpath += cnt;
d899e254 956 volpath += vpappend;
957 symname = snstr1;
ac81c411 958 symname += cnt;
d899e254 959 symname += snappend;
84cbbd90 960 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
961 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
ac81c411 962 modnum++;
963 }
84cbbd90 964
ac81c411 965 for(Int_t cnt=1; cnt<=18; cnt++){
d899e254 966 volpath = vpstr2;
ac81c411 967 volpath += cnt;
d899e254 968 volpath += vpappend;
969 symname = snstr2;
ac81c411 970 symname += cnt;
d899e254 971 symname += snappend;
84cbbd90 972 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
973 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
ac81c411 974 modnum++;
975 }
976}
977
37831078 978//_____________________________________________________________________________
d899e254 979void AliTPCv2::DrawDetector() const
37831078 980{
981 //
982 // Draw a shaded view of the Time Projection Chamber version 1
983 //
984
985 // Set everything unseen
986 gMC->Gsatt("*", "seen", -1);
987 //
988 // Set ALIC mother transparent
989 gMC->Gsatt("ALIC","SEEN",0);
990 //
991 // Set the volumes visible
992 //
993
994 gMC->Gsatt("TPC ","SEEN",0);
995 gMC->Gsatt("TOIN","SEEN",1);
996 gMC->Gsatt("TOIN","COLO",7);
37831078 997 gMC->Gsatt("TOCV","SEEN",1);
998 gMC->Gsatt("TOCV","COLO",4);
999 gMC->Gsatt("TSA1","SEEN",0);
1000 gMC->Gsatt("TSA2","SEEN",0);
1001 gMC->Gsatt("TSA3","SEEN",0);
79575d04 1002 gMC->Gsatt("TSA4","SEEN",0);
1003 gMC->Gsatt("TSA5","SEEN",0);
37831078 1004 gMC->Gsatt("TOFC","SEEN",1);
1005 gMC->Gsatt("TOFC","COLO",4);
37831078 1006 gMC->Gsatt("TSA6","SEEN",0);
1007 gMC->Gsatt("TSA7","SEEN",0);
79575d04 1008 gMC->Gsatt("TSA8","SEEN",0);
37831078 1009 gMC->Gsatt("TIIN","SEEN",1);
79575d04 1010 gMC->Gsatt("TIIN","COLO",7);
1011 gMC->Gsatt("TII1","SEEN",0);
1012 gMC->Gsatt("TIFC","SEEN",1);
1013 gMC->Gsatt("TIFC","COLO",4);
1014 gMC->Gsatt("TSA9","SEEN",0);
37831078 1015 gMC->Gsatt("TS10","SEEN",0);
1016 gMC->Gsatt("TS11","SEEN",0);
1017 gMC->Gsatt("TS12","SEEN",0);
37831078 1018 gMC->Gsatt("TS13","SEEN",0);
1019 gMC->Gsatt("TS14","SEEN",0);
79575d04 1020 gMC->Gsatt("TICC","SEEN",0);
1021 gMC->Gsatt("TICM","SEEN",0);
37831078 1022 gMC->Gsatt("TS15","SEEN",0);
1023 gMC->Gsatt("TS16","SEEN",0);
37831078 1024 gMC->Gsatt("TS17","SEEN",0);
79575d04 1025 gMC->Gsatt("TS18","SEEN",0);
1026 gMC->Gsatt("TS19","SEEN",0);
1027 gMC->Gsatt("TPJ1","SEEN",0);
1028 gMC->Gsatt("TPJ2","SEEN",0);
1029 gMC->Gsatt("TICS","SEEN",0);
1030 gMC->Gsatt("TDGN","SEEN",0);
37831078 1031 gMC->Gsatt("TIRC","SEEN",0);
1032 gMC->Gsatt("TIC1","SEEN",1);
1033 gMC->Gsatt("TIPP","SEEN",0);
1034 gMC->Gsatt("TIC3","SEEN",0);
1035 gMC->Gsatt("TRCE","SEEN",0);
1036 gMC->Gsatt("TPSC","SEEN",0);
79575d04 1037 gMC->Gsatt("TPCC","SEEN",0);
37831078 1038 gMC->Gsatt("TORC","SEEN",0);
1039 gMC->Gsatt("TOPP","SEEN",0);
1040 gMC->Gsatt("TOC3","SEEN",0);
1041 gMC->Gsatt("TOC1","SEEN",1);
1042 gMC->Gsatt("TSSW","SEEN",1);
1043 gMC->Gsatt("TSWC","SEEN",1);
37831078 1044 gMC->Gsatt("TSSW","COLO",3);
1045 gMC->Gsatt("TSWC","COLO",3);
1046 gMC->Gsatt("TSCE","COLO",6);
79575d04 1047 gMC->Gsatt("TSCE","SEEN",1);
37831078 1048 gMC->Gsatt("TWES","SEEN",0);
1049 gMC->Gsatt("TSWB","SEEN",0);
1050 gMC->Gsatt("TPEL","SEEN",0);
1051 gMC->Gsatt("TPMW","SEEN",1);
37831078 1052 gMC->Gsatt("TESR","SEEN",1);
1053 gMC->Gsatt("TPMW","COLO",12);
37831078 1054 gMC->Gsatt("TIC1","COLO",5);
79575d04 1055 gMC->Gsatt("TOC1","COLO",5);
37831078 1056 gMC->Gsatt("TESB","SEEN",0);
37831078 1057 gMC->Gsatt("THVM","SEEN",1);
1058 gMC->Gsatt("THVM","COLO",11);
79575d04 1059 gMC->Gsatt("THVH","SEEN",0);
1060 gMC->Gsatt("TPSR","SEEN",0);
37831078 1061 gMC->Gsatt("THVL","SEEN",0);
79575d04 1062 gMC->Gsatt("THVC","SEEN",0);
37831078 1063 gMC->Gsatt("THVE","SEEN",0);
1064 gMC->Gsatt("THVR","SEEN",0);
79575d04 1065 gMC->Gsatt("TPSS","SEEN",0);
1066 gMC->Gsatt("TPUS","SEEN",0);
1067 gMC->Gsatt("TPLS","SEEN",0);
37831078 1068
1069 //
1070 gMC->Gdopt("hide", "on");
1071 gMC->Gdopt("shad", "on");
1072 gMC->Gsatt("*", "fill", 7);
1073 gMC->SetClipBox(".");
1074 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1075 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1076 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1077 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1078 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1079 gMC->DefaultRange();
1080 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1081 gMC->Gdhead(1111, "Time Projection Chamber");
1082 gMC->Gdman(18, 4, "MAN");
1083 gMC->Gdopt("hide","off");
1084}
1085
1086//_____________________________________________________________________________
1087void AliTPCv2::CreateMaterials()
1088{
1089 //
1090 // Define materials for version 2 of the Time Projection Chamber
1091 //
1092
1093 AliTPC::CreateMaterials();
1094}
1095
1096//_____________________________________________________________________________
1097void AliTPCv2::Init()
1098{
1099 //
1100 // Initialises version 2 of the TPC after that it has been built
1101 //
1102
1103 Int_t *idtmed = fIdtmed->GetArray();
1104
1105 AliTPC::Init();
d4c354b9 1106
c1637e41 1107
1108 fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected...
d4c354b9 1109
c1637e41 1110 fIDrift=gMC->VolId("TPC_Drift");
1111 fSecOld=-100; // fake number
37831078 1112
1113 gMC->SetMaxNStep(30000); // max. number of steps increased
1114
1115 gMC->Gstpar(idtmed[2],"LOSS",5); // specific energy loss
1116
f77f13c8 1117 AliInfo("*** TPC version 2 initialized ***");
1118 AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
37831078 1119
1120 //
fe4da5cc 1121
1122}
1123
1124//_____________________________________________________________________________
1125void AliTPCv2::StepManager()
1126{
1127 //
1128 // Called for every step in the Time Projection Chamber
1129 //
1130
1131 //
1132 // parameters used for the energy loss calculations
1133 //
73042f01 1134 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1135 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1136 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
fe4da5cc 1137
1138
73042f01 1139 const Float_t kbig = 1.e10;
fe4da5cc 1140
1141 Int_t id,copy;
e61fd20d 1142 Float_t hits[5];
fe4da5cc 1143 Int_t vol[2];
37831078 1144 TLorentzVector p;
fe4da5cc 1145
37831078 1146 vol[1]=0; // preset row number to 0
fe4da5cc 1147 //
73042f01 1148 gMC->SetMaxStep(kbig);
fe4da5cc 1149
0a6d8768 1150 if(!gMC->IsTrackAlive()) return; // particle has disappeared
fe4da5cc 1151
cfce8870 1152 Float_t charge = gMC->TrackCharge();
fe4da5cc 1153
1154 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1155
37831078 1156 // check the sensitive volume
1157
c1637e41 1158 id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1159 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
da33556f 1160
c1637e41 1161 gMC->TrackPosition(p);
1162 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1163 //
1164
1165 //
1166 Double_t angle = TMath::ACos(p[0]/r);
1167 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1168 //
1169 // angular segment, it is not a real sector number...
1170 //
1171 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1172 fTPCParam->GetInnerAngle());
1173 // rotate to segment "0"
1174 Float_t cos,sin;
1175 fTPCParam->AdjustCosSin(sector,cos,sin);
1176 Float_t x1=p[0]*cos + p[1]*sin;
1177 // check if within sector's limits
1178 if(x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp()
1179 ||x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp()){
1180 // calculate real sector number...
1181 if (x1>fTPCParam->GetOuterRadiusLow()){
1182 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1183 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1184 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
37831078 1185 }
c1637e41 1186 else
1187 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1188 //
1189 // here I have a sector number
1190 //
37831078 1191
c1637e41 1192 vol[0]=sector;
1193 // check if change of sector
1194 if(sector != fSecOld){
1195 fSecOld=sector;
1196 // add track reference
1197 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
1198 }
1199 // track is in the sensitive strip
1200 if(id == fIdSens){
1201 // track is entering the strip
1202 if (gMC->IsTrackEntering()){
1203 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1204 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1205 // row numbers are autonomous for lower and upper sectors
1206 if(vol[0] > fTPCParam->GetNInnerSector()) {
1207 vol[1] -= fTPCParam->GetNRowLow();
1208 }
1209 //
1210 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
37831078 1211
c1637e41 1212 // lower sector, row 0, because Jouri wants to have this
37831078 1213
c1637e41 1214 gMC->TrackMomentum(p);
1215 hits[0]=p[0];
1216 hits[1]=p[1];
1217 hits[2]=p[2];
1218 hits[3]=0.; // this hit has no energy loss
1219 // Get also the track time for pileup simulation
1220 hits[4]=gMC->TrackTime();
6a905708 1221
c1637e41 1222 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1223 }
1224 //
e61fd20d 1225
c1637e41 1226 gMC->TrackPosition(p);
1227 hits[0]=p[0];
1228 hits[1]=p[1];
1229 hits[2]=p[2];
1230 hits[3]=0.; // this hit has no energy loss
1231 // Get also the track time for pileup simulation
1232 hits[4]=gMC->TrackTime();
930ee558 1233
c1637e41 1234 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
37831078 1235
c1637e41 1236 }
1237 else return;
1238 }
37831078 1239 //-----------------------------------------------------------------
c1637e41 1240 // charged particle is in the sensitive drift volume
37831078 1241 //-----------------------------------------------------------------
cfce8870 1242 if(gMC->TrackStep() > 0) {
c1637e41 1243
73042f01 1244 Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
fe4da5cc 1245 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
c1637e41 1246 //
37831078 1247 gMC->TrackPosition(p);
1248 hits[0]=p[0];
1249 hits[1]=p[1];
1250 hits[2]=p[2];
fe4da5cc 1251 hits[3]=(Float_t)nel;
c1637e41 1252
fe4da5cc 1253 // Add this hit
c1637e41 1254
6a905708 1255 if (fHitType&&2){
1256 gMC->TrackMomentum(p);
1257 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1258 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
1259 fTrackHits->SetHitPrecision(precision);
1260 }
e61fd20d 1261
1262 // Get also the track time for pileup simulation
1263 hits[4]=gMC->TrackTime();
c1637e41 1264
1265 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
e61fd20d 1266
c1637e41 1267 } // step>0
1268 } //within sector's limits
fe4da5cc 1269 // Stemax calculation for the next step
1270
1271 Float_t pp;
0a6d8768 1272 TLorentzVector mom;
1273 gMC->TrackMomentum(mom);
1274 Float_t ptot=mom.Rho();
73042f01 1275 Float_t betaGamma = ptot/gMC->TrackMass();
fe4da5cc 1276
69e40cce 1277 Int_t pid=gMC->TrackPid();
cc80f89e 1278 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
fe4da5cc 1279 {
73042f01 1280 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
fe4da5cc 1281 }
1282 else
1283 {
595bf2c3 1284
07521998 1285 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
595bf2c3 1286 pp=kprim*BetheBloch(betaGamma);
1287
fe4da5cc 1288 if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1289 }
1290
b9d0a01d 1291 Double_t rnd = gMC->GetRandom()->Rndm();
fe4da5cc 1292
cfce8870 1293 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
fe4da5cc 1294
c1637e41 1295
fe4da5cc 1296}
1297
1298//_____________________________________________________________________________
1299Float_t AliTPCv2::BetheBloch(Float_t bg)
1300{
1301 //
1302 // Bethe-Bloch energy loss formula
1303 //
73042f01 1304 const Double_t kp1=0.76176e-1;
1305 const Double_t kp2=10.632;
1306 const Double_t kp3=0.13279e-4;
1307 const Double_t kp4=1.8631;
1308 const Double_t kp5=1.9479;
fe4da5cc 1309
1310 Double_t dbg = (Double_t) bg;
1311
1312 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1313
73042f01 1314 Double_t aa = TMath::Power(beta,kp4);
1315 Double_t bb = TMath::Power(1./dbg,kp5);
fe4da5cc 1316
73042f01 1317 bb=TMath::Log(kp3+bb);
fe4da5cc 1318
73042f01 1319 return ((Float_t)((kp2-aa-bb)*kp1/aa));
fe4da5cc 1320}
73042f01 1321
1322