Added new materials
[u/mrichter/AliRoot.git] / TPC / AliTPCv2.cxx
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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"
e6add757 38#include "AliTrackReference.h"
73042f01 39#include "AliTPCParam.h"
4ed5dced 40#include "AliTPCTrackHitsV2.h"
116cbefd 41#include "AliTPCv2.h"
cdf69b9a 42#include "AliGeomManager.h"
c1637e41 43#include "TGeoVolume.h"
44#include "TGeoPcon.h"
45#include "TGeoTube.h"
46#include "TGeoPgon.h"
47#include "TGeoTrd1.h"
48#include "TGeoCompositeShape.h"
49#include "TGeoPara.h"
1ac29fc4 50#include "TGeoPhysicalNode.h"
51
fe4da5cc 52ClassImp(AliTPCv2)
53
54//_____________________________________________________________________________
55AliTPCv2::AliTPCv2(const char *name, const char *title) :
e046d791 56 AliTPC(name, title),
57 fIdSens(0),
58 fIDrift(0),
59 fSecOld(0)
fe4da5cc 60{
61 //
62 // Standard constructor for Time Projection Chamber version 2
63 //
37831078 64
73042f01 65
c1637e41 66 SetBufferSize(128000);
73042f01 67
73042f01 68
69 if (fTPCParam)
70 fTPCParam->Write(fTPCParam->GetTitle());
fe4da5cc 71}
72
73//_____________________________________________________________________________
74void AliTPCv2::CreateGeometry()
75{
76 //
77 // Create the geometry of Time Projection Chamber version 2
78 //
79 //Begin_Html
80 /*
37831078 81 <img src="picts/AliTPC.gif">
fe4da5cc 82 */
83 //End_Html
84 //Begin_Html
85 /*
1439f98e 86 <img src="picts/AliTPCv2Tree.gif">
fe4da5cc 87 */
88 //End_Html
89
c1637e41 90 //----------------------------------------------------------
91 // This geometry is written using TGeo class
92 // Firstly the shapes are defined, and only then the volumes
93 // What is recognized by the MC are volumes
94 //----------------------------------------------------------
37831078 95 //
c1637e41 96 // tpc - this will be the mother volume
37831078 97 //
79575d04 98
37831078 99 //
c1637e41 100 // here I define a volume TPC
101 // retrive the medium name with "TPC_" as a leading string
37831078 102 //
c1637e41 103 TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
104 tpc->DefineSection(0,-290.,77.,278.);
456cb019 105 tpc->DefineSection(1,-259.6,70.,278.);
37831078 106 //
c1637e41 107 tpc->DefineSection(2,-259.6,68.1,278.);
108 tpc->DefineSection(3,-253.6,68.1,278.);
37831078 109 //
c1637e41 110 tpc->DefineSection(4,-253.6,68.,278.);
111 tpc->DefineSection(5,-74.0,60.8,278.);
37831078 112 //
c1637e41 113 tpc->DefineSection(6,-74.0,60.1,278.);
114 tpc->DefineSection(7,-73.3,60.1,278.);
37831078 115 //
c1637e41 116 tpc->DefineSection(8,-73.3,56.9,278.);
117 tpc->DefineSection(9,73.3,56.9,278.);
37831078 118 //
c1637e41 119 tpc->DefineSection(10,73.3,60.1,278.);
120 tpc->DefineSection(11,74.0,60.1,278.);
37831078 121 //
c1637e41 122 tpc->DefineSection(12,74.0,60.8,278.);
123 tpc->DefineSection(13,253.6,65.5,278.);
37831078 124 //
c1637e41 125 tpc->DefineSection(14,253.6,65.6,278.);
126 tpc->DefineSection(15,259.6,65.6,278.);
37831078 127 //
456cb019 128 tpc->DefineSection(16,259.6,70.0,278.);
c1637e41 129 tpc->DefineSection(17,290.,77.,278.);
37831078 130 //
c1637e41 131 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
132 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
79575d04 133 //
c1637e41 134 // drift volume - sensitive volume, extended beyond the
135 // endcaps, because of the alignment
37831078 136 //
c1637e41 137 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
138 dvol->DefineSection(0,-260.,74.5,264.4);
139 dvol->DefineSection(1,-253.6,74.5,264.4);
37831078 140 //
c1637e41 141 dvol->DefineSection(2,-253.6,76.6774,258.);
142 dvol->DefineSection(3,253.6,76.6774,258.);
37831078 143 //
c1637e41 144 dvol->DefineSection(4,253.6,74.5,264.4);
145 dvol->DefineSection(5,260.,74.5,264.4);
37831078 146 //
c1637e41 147 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
148 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
37831078 149 //
c1637e41 150 v1->AddNode(v9,1);
37831078 151 //
c1637e41 152 // outer insulator
720b23b8 153 //
c1637e41 154 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
79575d04 155 //
c1637e41 156 tpco->DefineSection(0,-256.6,264.8,278.);
157 tpco->DefineSection(1,-253.6,264.8,278.);
158 //
159 tpco->DefineSection(2,-253.6,258.,278.);
160 tpco->DefineSection(3,250.6,258.,278.);
161 //
162 tpco->DefineSection(4,250.6,258.,275.5);
163 tpco->DefineSection(5,253.6,258.,275.5);
164 //
165 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
166 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
167 //
168 // outer containment vessel
169 //
170 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
171 //
172 tocv->DefineSection(0,-256.6,264.8,278.);
173 tocv->DefineSection(1,-253.6,264.8,278.);
174 //
175 tocv->DefineSection(2,-253.6,274.8124,278.);
176 tocv->DefineSection(3,247.6,274.8124,278.);
177 //
178 tocv->DefineSection(4,247.6,270.4,278.);
179 tocv->DefineSection(5,250.6,270.4,278.);
180 //
181 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
182 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
183 //
184 TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
185 TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
186 TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
187 TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
188 //
189 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
190 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
191 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
192 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
193 //
194 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
195 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
196 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
197 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
198 //-------------------------------------------------------
37831078 199 // Tpc Outer Field Cage
c1637e41 200 // daughters - composite (sandwich)
37831078 201 //-------------------------------------------------------
1283eee5 202
c1637e41 203 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
79575d04 204 //
c1637e41 205 tofc->DefineSection(0,-253.6,258.,269.6);
206 tofc->DefineSection(1,-250.6,258.,269.6);
37831078 207 //
c1637e41 208 tofc->DefineSection(2,-250.6,258.,260.0676);
209 tofc->DefineSection(3,250.6,258.,260.0676);
37831078 210 //
c1637e41 211 tofc->DefineSection(4,250.6,258.,275.5);
212 tofc->DefineSection(5,253.6,258.,275.5);
37831078 213 //
c1637e41 214 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
215 //sandwich
216 TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
217 TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
218 TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
37831078 219 //
c1637e41 220 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
37831078 221 //
c1637e41 222 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
223 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
224 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
37831078 225 //
c1637e41 226 // outer part - positioning
37831078 227 //
c1637e41 228 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
37831078 229 //
c1637e41 230 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
37831078 231 //
456cb019 232 v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
37831078 233 //
c1637e41 234 v2->AddNode(v3,1); v2->AddNode(v4,1);
37831078 235 //
c1637e41 236 v1->AddNode(v2,1);
237 //--------------------------------------------------------------------
238 // Tpc Inner INsulator (CO2)
239 // the cones, the central drum and the inner f.c. sandwich with a piece
240 // of the flane will be placed in the TPC
241 //--------------------------------------------------------------------
242 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
37831078 243 //
c1637e41 244 tpci->DefineSection(0,-253.6,68.4,76.6774);
245 tpci->DefineSection(1,-74.0,61.2,76.6774);
37831078 246 //
c1637e41 247 tpci->DefineSection(2,74.0,61.2,76.6774);
37831078 248 //
c1637e41 249 tpci->DefineSection(3,253.6,65.9,76.6774);
37831078 250 //
c1637e41 251 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
37831078 252 //
c1637e41 253 // now the inner field cage - only part of flanges (2 copies)
37831078 254 //
c1637e41 255 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
256 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
37831078 257 //
c1637e41 258 //---------------------------------------------------------
259 // Tpc Inner Containment vessel - Muon side
79575d04 260 //---------------------------------------------------------
c1637e41 261 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
37831078 262 //
c1637e41 263 tcms->DefineSection(0,-259.1,68.1,74.2);
264 tcms->DefineSection(1,-253.6,68.1,74.2);
37831078 265 //
c1637e41 266 tcms->DefineSection(2,-253.6,68.1,68.4);
267 tcms->DefineSection(3,-74.0,60.9,61.2);
37831078 268 //
c1637e41 269 tcms->DefineSection(4,-74.0,60.1,61.2);
270 tcms->DefineSection(5,-73.3,60.1,61.2);
37831078 271 //
c1637e41 272 tcms->DefineSection(6,-73.3,56.9,61.2);
273 tcms->DefineSection(7,-73.0,56.9,61.2);
37831078 274 //
c1637e41 275 tcms->DefineSection(8,-73.0,56.9,58.8);
276 tcms->DefineSection(9,-71.3,56.9,58.8);
37831078 277 //
c1637e41 278 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
279 //-----------------------------------------------
280 // inner containment vessel - shaft side
281 //-----------------------------------------------
282 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
37831078 283 //
c1637e41 284 tcss->DefineSection(0,71.3,56.9,58.8);
285 tcss->DefineSection(1,73.0,56.9,58.8);
1283eee5 286 //
c1637e41 287 tcss->DefineSection(2,73.0,56.9,61.2);
288 tcss->DefineSection(3,73.3,56.9,61.2);
289 //
290 tcss->DefineSection(4,73.3,60.1,61.2);
291 tcss->DefineSection(5,74.0,60.1,61.2);
1283eee5 292 //
c1637e41 293 tcss->DefineSection(6,74.0,60.9,61.2);
294 tcss->DefineSection(7,253.6,65.6,65.9);
37831078 295 //
c1637e41 296 tcss->DefineSection(8,253.6,65.6,74.2);
297 tcss->DefineSection(9,258.1,65.6,74.2);
1283eee5 298 //
c1637e41 299 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
300 //-----------------------------------------------
301 // Inner field cage
302 // define 4 parts and make an assembly
303 //-----------------------------------------------
304 // part1 - Al - 2 copies
305 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
306 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
307 // sandwich - outermost parts - 2 copies
308 TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
309 TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
310 TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
311 TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
1283eee5 312 //
c1637e41 313 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
314 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
315 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
316 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
37831078 317 //
c1637e41 318 // middle parts - 2 copies
319 TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
320 TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
321 TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
322 TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
79575d04 323 //
c1637e41 324 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
325 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
326 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
327 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
328 // central part - 1 copy
329 TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
330 TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
331 TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
79575d04 332 //
c1637e41 333 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
334 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
335 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
79575d04 336 //
c1637e41 337 // inner part - positioning
79575d04 338 //
c1637e41 339 // creating a sandwich
340 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
79575d04 341 //
c1637e41 342 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
79575d04 343 //
c1637e41 344 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
37831078 345 //
c1637e41 346 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
37831078 347 //
c1637e41 348 tv100->AddNode(tv10,1);
349 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
350 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
351 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
352 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
353 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
354 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
355 //
356 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
357 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
358 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
359 v9->AddNode(tv100,1);
360 //
361 // central drum
362 //
363 // flange + sandwich
364 //
365 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
366 cfl->DefineSection(0,-71.1,59.7,61.2);
367 cfl->DefineSection(1,-68.6,59.7,61.2);
368 //
369 cfl->DefineSection(2,-68.6,60.6324,61.2);
370 cfl->DefineSection(3,68.6,60.6324,61.2);
371 //
372 cfl->DefineSection(4,68.6,59.7,61.2);
373 cfl->DefineSection(5,71.1,59.7,61.2);
374 //
375 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
376 // sandwich
377 TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
378 TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
379 TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
380 //
381 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
382 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
383 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
384 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
385 //
386 // seals for central drum 2 copies
387 //
388 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
389 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
390 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
3378c058 391 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
392 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
c1637e41 393 //
394 // seal collars
395 TGeoPcon *se = new TGeoPcon(0.,360.,6);
396 se->DefineSection(0,-72.8,59.7,61.2);
397 se->DefineSection(1,-72.3,59.7,61.2);
398 //
399 se->DefineSection(2,-72.3,58.85,61.2);
400 se->DefineSection(3,-71.6,58.85,61.2);
401 //
402 se->DefineSection(4,-71.6,59.7,61.2);
403 se->DefineSection(5,-71.3,59.7,61.2);
404 //
405 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
406 //
407 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
408 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
409 //
410 // define reflection matrix
411 //
4fa47888 412 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
c1637e41 413 //
414 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
415 //
a1ec4d07 416 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
417 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
c1637e41 418 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
419 //
420 // central membrane - 2 rings and a mylar membrane - assembly
421 //
422 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
423 TGeoTube *oh = new TGeoTube(250.,256.,.5);
424 TGeoTube *mem = new TGeoTube(84.05,250,0.01);
425 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
426 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
427 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
428 //
429 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
430 cm->AddNode(ihv,1);
431 cm->AddNode(ohv,1);
432 cm->AddNode(memv,1);
433 v9->AddNode(cm,1);
434 //
435 // end caps - they are make as an assembly of single segments
436 // containing both readout chambers
437 //
d899e254 438 Double_t openingAngle = 10.*TMath::DegToRad();
c1637e41 439 Double_t thick=1.5; // rib
d899e254 440 Double_t shift = thick/TMath::Sin(openingAngle);
c1637e41 441 //
d899e254 442 Double_t lowEdge = 86.3; // hole in the wheel
443 Double_t upEdge = 240.4; // hole in the wheel
c1637e41 444 //
445 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
446 //
447 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
448 //
d899e254 449 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
450 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
c1637e41 451 //
d899e254 452 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
453 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
c1637e41 454 //
d899e254 455 Double_t ys = shift*TMath::Sin(openingAngle);
456 Double_t xs = shift*TMath::Cos(openingAngle);
c1637e41 457 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
458 tr->RegisterYourself();
459 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
460 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
461 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
462 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
463 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
464 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
465 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
466 //
467 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
468 //
469 // readout chambers
470 //
471 // IROC first
472 //
473 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
474 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
37831078 475 // empty space
c1637e41 476 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
477 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
478 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
479 //bars
480 Double_t tga = (19.8328-12.3742)/39.3;
481 Double_t xmin,xmax;
482 xmin = 9.55*tga+12.3742;
483 xmax = 9.95*tga+12.3742;
484 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
485 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
486 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
487 xmin=19.4*tga+12.3742;
488 xmax=19.9*tga+12.3742;
489 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
490 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
491 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
492 xmin=29.35*tga+12.3742;
493 xmax=29.75*tga+12.3742;
494 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
495 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
496 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
497 //
498 // holes for connectors
499 //
500 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
501 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
d9e80aca 502 TString fileName(gSystem->Getenv("ALICE_ROOT"));
503 fileName += "/TPC/conn_iroc.dat";
c1637e41 504 ifstream in;
d9e80aca 505 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 506 for(Int_t i =0;i<86;i++){
456cb019 507 Double_t y = 3.99;
c1637e41 508 Double_t x,z,ang;
509 in>>x>>z>>ang;
456cb019 510 z-=26.5;
c1637e41 511 TGeoRotation *rrr = new TGeoRotation();
512 rrr->RotateY(ang);
513 TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
514 ibdv->AddNode(connv,i+1,trans);
515 }
516 in.close();
517 // "cap"
518 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
519 // "hole"
520 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
521 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
522 tr1->RegisterYourself();
523 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
524 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
525 //
526 // pad plane and wire fixations
527 //
528 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
529 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
530 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
531 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
532 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
533 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
534 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
535 //
536 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
537 //
538 iroc->AddNode(ibdv,1);
539 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
540 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
541 tga =(23.3521-14.5974)/49.65;
542 Double_t xx = 24.825*tga+14.5974-0.6;
543 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
544 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
545 //
546 // OROC
547 //
548 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
549 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
550 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
551 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
552 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
553 //horizontal bars
554 tga=(38.5084-20.2938)/99.3;
555 xmin=tga*10.2+20.2938;
556 xmax=tga*10.6+20.2938;
557 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
558 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
559 //
560 xmin=22.55*tga+20.2938;
561 xmax=24.15*tga+20.2938;
562 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
563 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
564 //
565 xmin=36.1*tga+20.2938;
566 xmax=36.5*tga+20.2938;
567 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
568 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
569 //
570 xmin=49.0*tga+20.2938;
571 xmax=50.6*tga+20.2938;
572 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
573 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
574 //
575 xmin=63.6*tga+20.2938;
576 xmax=64.0*tga+20.2938;
577 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
578 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
579 //
580 xmin=75.5*tga+20.2938;
581 xmax=77.15*tga+20.2938;
582 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
583 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
584 //
585 xmin=88.7*tga+20.2938;
586 xmax=89.1*tga+20.2938;
587 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
588 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
589 //
590 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
591 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
592 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
593 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
594 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
595 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
596 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
597 // vertical bars
598 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
599 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
600 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
601 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
602 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
603 //
604 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
605 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
606 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
607 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
608 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
609 //
610 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
611 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
612 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
613 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
614 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
615 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
616 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
617 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
618 //
619 // holes for connectors
620 //
d9e80aca 621 fileName = gSystem->Getenv("ALICE_ROOT");
622 fileName += "/TPC/conn_oroc.dat";
623 in.open(fileName.Data(), ios_base::in); // asci file
c1637e41 624 for(Int_t i =0;i<78;i++){
625 Double_t y =3.89;
626 Double_t x,z,ang;
627 Double_t x1,z1,x2,z2;
628 in>>x>>z>>ang;
629 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
630 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
631 //
632 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
633 //
634 TGeoRotation *rr = new TGeoRotation();
635 rr->RotateY(ang);
636 z1-=54.95;
637 z2-=54.95;
638 TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
639 TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
640 obdv->AddNode(connv,i+1,trans1);
641 obdv->AddNode(connv,i+79,trans2);
642 }
643 in.close();
644 // cap
645 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
646 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
647 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
648 tr5->RegisterYourself();
649 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
650 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
651 //
652 // pad plane and wire fixations
653 //
654 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
655 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
656 //
657 tga=(43.5239-23.3874)/114.2;
658 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
659 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
660 xx = 57.1*tga+23.3874-0.7;
661 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
662 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
663 //
664 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
665 //
666 oroc->AddNode(obdv,1);
667 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
668 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
669 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
670 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
671 //
672 // now iroc and oroc are placed into a sector...
673 //
a1ec4d07 674 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
675 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
c1637e41 676 TGeoRotation rot1("rot1",90.,90.,0.);
677 TGeoRotation rot2("rot2");
678 rot2.RotateY(10.);
679 TGeoRotation *rot = new TGeoRotation("rot");
680 *rot=rot1*rot2;
681 //
682 Double_t x0,y0;
d899e254 683 x0=110.2*TMath::Cos(openingAngle);
684 y0=110.2*TMath::Sin(openingAngle);
1bae4c82 685 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
686 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
d899e254 687 x0=188.45*TMath::Cos(openingAngle);
688 y0=188.45*TMath::Sin(openingAngle);
1bae4c82 689 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
690 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
c1637e41 691 //
c1637e41 692 //
a1ec4d07 693 // A-side
c1637e41 694 //
a1ec4d07 695 secta->AddNode(ch,1);
696 secta->AddNode(iroc,1,combi1a);
697 secta->AddNode(oroc,1,combi2a);
698 //
699 // C-side
700 //
701 sectc->AddNode(ch,1);
702 sectc->AddNode(iroc,1,combi1c);
703 sectc->AddNode(oroc,1,combi2c);
704 //
705 // now I try to make wheels...
706 //
707 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
708 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
c1637e41 709 //
710 for(Int_t i =0;i<18;i++){
711 Double_t phi = (20.*i);
712 TGeoRotation *r = new TGeoRotation();
713 r->RotateZ(phi);
a1ec4d07 714 wheela->AddNode(secta,i+1,r);
715 wheelc->AddNode(sectc,i+1,r);
c1637e41 716
717 }
4fa47888 718 // wheels in the drift volume!
a1ec4d07 719
c1637e41 720 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
a1ec4d07 721 v9->AddNode(wheela,1,combi3);
722 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
c1637e41 723 //_____________________________________________________________
724 // service support wheel
725 //_____________________________________________________________
726 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
727 sw->DefineSection(0,-4.,80.5,251.75);
728 sw->DefineSection(1,4.,80.5,251.75);
729 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
730 //
731 thick=1.;
d899e254 732 shift = thick/TMath::Sin(openingAngle);
c1637e41 733 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
734 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
735 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
736 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
737 //
74518339 738 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
739 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
740 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
741 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
742 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
743 //
744 shv->AddNode(elv,1);
745 //
746 //
d899e254 747 ys = shift*TMath::Sin(openingAngle);
748 xs = shift*TMath::Cos(openingAngle);
c1637e41 749 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
750 // cover
751 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
752 co->DefineSection(0,-0.5,77.,255.25);
753 co->DefineSection(1,0.5,77.,255.25);
754 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
755 // hole in a cover
756 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
d899e254 757 shift=4./TMath::Sin(openingAngle);
c1637e41 758 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
759 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
760 //
761 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
762 //
d899e254 763 ys = shift*TMath::Sin(openingAngle);
764 xs = shift*TMath::Cos(openingAngle);
c1637e41 765 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
766 //
767 // Sector as an Assembly
768 //
769 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
770 swhs->AddNode(swv,1);
771 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
772 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
773 //
774 // SSW as an Assembly of sectors
775 //
776 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
777 for(Int_t i =0;i<18;i++){
778 Double_t phi = (20.*i);
779 TGeoRotation *r = new TGeoRotation();
780 r->RotateZ(phi);
781 swheel->AddNode(swhs,i+1,r);
782 }
783 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
784 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
785
786 // sensitive strips - strip "0" is always set
787 // conditional
788 Int_t totrows;
789 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
790 Double_t *upar;
791 upar=NULL;
792 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
793 upar=new Double_t [10];
794 upar[0]=0.;
795 upar[1]=360.;
796 upar[2]=18.;
797 upar[3]=2.;
798 //
799 upar[4]=-124.8;
800 upar[7]=124.8;
801
802 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
803
804 upar[5]=rlow;
805 upar[6]=rlow+.01;
806 upar[8]=upar[5];
807 upar[9]=upar[6];
808 //
809 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
810 gGeoManager->Node("TPC_Strip",totrows+1,
811 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
812 //
813 // now, strips optionally
814 //
815 if(fSens){
816 //lower sectors
817 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
818 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
819 upar[5]=rlow;
820 upar[6]=rlow+.01;
821 upar[8]=upar[5];
822 upar[9]=upar[6];
823 gGeoManager->Node("TPC_Strip",i,
824 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
825 gGeoManager->Node("TPC_Strip",totrows+i,
826 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
827 }
828 //upper sectors
829 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
830 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
831 upar[5]=rlow;
832 upar[6]=rlow+.01;
833 upar[8]=upar[5];
834 upar[9]=upar[6];
835 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
836 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
837 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
838 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
839 }
840 }//strips
37831078 841 //----------------------------------------------------------
c1637e41 842 // TPc Support Rods - MAKROLON
37831078 843 //----------------------------------------------------------
c1637e41 844 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
845 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
846 // upper and lower rods differ in length!
847 delete [] upar;
848 upar=NULL;
849 gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
850 upar=new Double_t [3];
851 upar[0]=1.8;
852 upar[1]=2.2;
1283eee5 853
c1637e41 854 //
855 //HV rods - makrolon + 0.58cm (diameter) Cu
ae4806ca 856 TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
c1637e41 857 TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
858 //
859 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
860 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
861 hvrv->AddNode(hvcv,1);
862
7281dc07 863 for(Int_t i=0;i<18;i++){
c1637e41 864 Double_t angle,x,y;
865 Double_t z,r;
866 angle=TMath::DegToRad()*20.*(Double_t)i;
867 r=81.5;
868 x=r * TMath::Cos(angle);
869 y=r * TMath::Sin(angle);
870 upar[2]=126.64; //lower
871 z= 126.96;
872 if(i==15){
873 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
874 v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
37831078 875 }
876 else{
c1637e41 877 gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
0079eac0 878 gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
37831078 879 }
c1637e41 880 r=254.25;
881 x=r * TMath::Cos(angle);
882 y=r * TMath::Sin(angle);
883 upar[2]=126.54; //upper
884 z=127.06;
0079eac0 885 gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
886 gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
37831078 887 }
1283eee5 888
69776907 889 delete [] upar;
890
bde68ab0 891 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
892 alice->AddNode(v1,1);
c1637e41 893
1283eee5 894} // end of function
fe4da5cc 895
896//_____________________________________________________________________________
ac81c411 897void AliTPCv2::AddAlignableVolumes() const
898{
899 //
900 // Create entries for alignable volumes associating the symbolic volume
901 // name with the corresponding volume path. Needs to be syncronized with
902 // eventual changes in the geometry.
903 //
904 SetInnerChambersAlignable();
905 SetOuterChambersAlignable();
906}
907
908//_____________________________________________________________________________
909void AliTPCv2::SetInnerChambersAlignable() const
910{
911 //
cdf69b9a 912 AliGeomManager::ELayerID idTPC1 = AliGeomManager::kTPC1;
913 Int_t modUID, modnum = 0;
d899e254 914 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
915 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
916 TString vpappend = "/TPC_IROC_1";
917 TString snstr1="TPC/EndcapA/Sector";
918 TString snstr2="TPC/EndcapC/Sector";
919 TString snappend="/InnerChamber";
ac81c411 920 TString volpath, symname;
921
1ac29fc4 922 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 923 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
1ac29fc4 924 volpath = vpstr1;
925 volpath += cnt;
926 volpath += vpappend;
927 symname = snstr1;
928 symname += cnt;
929 symname += snappend;
cdf69b9a 930 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 931 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 932 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
933 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 934 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
935 alignableEntry->SetMatrix(matTtoL);
1ac29fc4 936 }
65293f49 937
ac81c411 938 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 939 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
d899e254 940 volpath = vpstr2;
ac81c411 941 volpath += cnt;
d899e254 942 volpath += vpappend;
943 symname = snstr2;
ac81c411 944 symname += cnt;
d899e254 945 symname += snappend;
cdf69b9a 946 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 947 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 948 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
949 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 950 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
951 alignableEntry->SetMatrix(matTtoL);
ac81c411 952 }
953}
954
ac81c411 955//_____________________________________________________________________________
956void AliTPCv2::SetOuterChambersAlignable() const
957{
958 //
cdf69b9a 959 AliGeomManager::ELayerID idTPC2 = AliGeomManager::kTPC2;
960 Int_t modUID, modnum = 0;
d899e254 961 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
962 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
963 TString vpappend = "/TPC_OROC_1";
964 TString snstr1="TPC/EndcapA/Sector";
965 TString snstr2="TPC/EndcapC/Sector";
966 TString snappend="/OuterChamber";
ac81c411 967 TString volpath, symname;
968
969 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 970 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
d899e254 971 volpath = vpstr1;
ac81c411 972 volpath += cnt;
d899e254 973 volpath += vpappend;
974 symname = snstr1;
ac81c411 975 symname += cnt;
d899e254 976 symname += snappend;
cdf69b9a 977 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 978 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 979 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
980 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 981 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
982 alignableEntry->SetMatrix(matTtoL);
ac81c411 983 }
84cbbd90 984
ac81c411 985 for(Int_t cnt=1; cnt<=18; cnt++){
cdf69b9a 986 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
d899e254 987 volpath = vpstr2;
ac81c411 988 volpath += cnt;
d899e254 989 volpath += vpappend;
990 symname = snstr2;
ac81c411 991 symname += cnt;
d899e254 992 symname += snappend;
cdf69b9a 993 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
84cbbd90 994 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
cdf69b9a 995 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
996 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1ac29fc4 997 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
998 alignableEntry->SetMatrix(matTtoL);
ac81c411 999 }
1000}
1001
1002//_____________________________________________________________________________
d899e254 1003void AliTPCv2::DrawDetector() const
fe4da5cc 1004{
1005 //
1006 // Draw a shaded view of the Time Projection Chamber version 1
1007 //
1008
fe4da5cc 1009 // Set everything unseen
cfce8870 1010 gMC->Gsatt("*", "seen", -1);
fe4da5cc 1011 //
1012 // Set ALIC mother transparent
cfce8870 1013 gMC->Gsatt("ALIC","SEEN",0);
fe4da5cc 1014 //
1015 // Set the volumes visible
37831078 1016 //
1017
1018 gMC->Gsatt("TPC ","SEEN",0);
1019 gMC->Gsatt("TOIN","SEEN",1);
1020 gMC->Gsatt("TOIN","COLO",7);
37831078 1021 gMC->Gsatt("TOCV","SEEN",1);
1022 gMC->Gsatt("TOCV","COLO",4);
1023 gMC->Gsatt("TSA1","SEEN",0);
1024 gMC->Gsatt("TSA2","SEEN",0);
1025 gMC->Gsatt("TSA3","SEEN",0);
79575d04 1026 gMC->Gsatt("TSA4","SEEN",0);
1027 gMC->Gsatt("TSA5","SEEN",0);
37831078 1028 gMC->Gsatt("TOFC","SEEN",1);
1029 gMC->Gsatt("TOFC","COLO",4);
37831078 1030 gMC->Gsatt("TSA6","SEEN",0);
1031 gMC->Gsatt("TSA7","SEEN",0);
79575d04 1032 gMC->Gsatt("TSA8","SEEN",0);
37831078 1033 gMC->Gsatt("TIIN","SEEN",1);
79575d04 1034 gMC->Gsatt("TIIN","COLO",7);
1035 gMC->Gsatt("TII1","SEEN",0);
1036 gMC->Gsatt("TIFC","SEEN",1);
1037 gMC->Gsatt("TIFC","COLO",4);
1038 gMC->Gsatt("TSA9","SEEN",0);
37831078 1039 gMC->Gsatt("TS10","SEEN",0);
1040 gMC->Gsatt("TS11","SEEN",0);
1041 gMC->Gsatt("TS12","SEEN",0);
37831078 1042 gMC->Gsatt("TS13","SEEN",0);
1043 gMC->Gsatt("TS14","SEEN",0);
79575d04 1044 gMC->Gsatt("TICC","SEEN",0);
1045 gMC->Gsatt("TICM","SEEN",0);
37831078 1046 gMC->Gsatt("TS15","SEEN",0);
1047 gMC->Gsatt("TS16","SEEN",0);
37831078 1048 gMC->Gsatt("TS17","SEEN",0);
79575d04 1049 gMC->Gsatt("TS18","SEEN",0);
1050 gMC->Gsatt("TS19","SEEN",0);
1051 gMC->Gsatt("TPJ1","SEEN",0);
1052 gMC->Gsatt("TPJ2","SEEN",0);
1053 gMC->Gsatt("TICS","SEEN",0);
1054 gMC->Gsatt("TDGN","SEEN",0);
37831078 1055 gMC->Gsatt("TIRC","SEEN",0);
1056 gMC->Gsatt("TIC1","SEEN",1);
1057 gMC->Gsatt("TIPP","SEEN",0);
1058 gMC->Gsatt("TIC3","SEEN",0);
1059 gMC->Gsatt("TRCE","SEEN",0);
1060 gMC->Gsatt("TPSC","SEEN",0);
79575d04 1061 gMC->Gsatt("TPCC","SEEN",0);
37831078 1062 gMC->Gsatt("TORC","SEEN",0);
1063 gMC->Gsatt("TOPP","SEEN",0);
1064 gMC->Gsatt("TOC3","SEEN",0);
1065 gMC->Gsatt("TOC1","SEEN",1);
1066 gMC->Gsatt("TSSW","SEEN",1);
1067 gMC->Gsatt("TSWC","SEEN",1);
37831078 1068 gMC->Gsatt("TSSW","COLO",3);
1069 gMC->Gsatt("TSWC","COLO",3);
1070 gMC->Gsatt("TSCE","COLO",6);
79575d04 1071 gMC->Gsatt("TSCE","SEEN",1);
37831078 1072 gMC->Gsatt("TWES","SEEN",0);
1073 gMC->Gsatt("TSWB","SEEN",0);
1074 gMC->Gsatt("TPEL","SEEN",0);
1075 gMC->Gsatt("TPMW","SEEN",1);
37831078 1076 gMC->Gsatt("TESR","SEEN",1);
1077 gMC->Gsatt("TPMW","COLO",12);
37831078 1078 gMC->Gsatt("TIC1","COLO",5);
79575d04 1079 gMC->Gsatt("TOC1","COLO",5);
37831078 1080 gMC->Gsatt("TESB","SEEN",0);
37831078 1081 gMC->Gsatt("THVM","SEEN",1);
1082 gMC->Gsatt("THVM","COLO",11);
79575d04 1083 gMC->Gsatt("THVH","SEEN",0);
1084 gMC->Gsatt("TPSR","SEEN",0);
37831078 1085 gMC->Gsatt("THVL","SEEN",0);
79575d04 1086 gMC->Gsatt("THVC","SEEN",0);
37831078 1087 gMC->Gsatt("THVE","SEEN",0);
1088 gMC->Gsatt("THVR","SEEN",0);
79575d04 1089 gMC->Gsatt("TPSS","SEEN",0);
1090 gMC->Gsatt("TPUS","SEEN",0);
1091 gMC->Gsatt("TPLS","SEEN",0);
37831078 1092
fe4da5cc 1093 //
cfce8870 1094 gMC->Gdopt("hide", "on");
1095 gMC->Gdopt("shad", "on");
1096 gMC->Gsatt("*", "fill", 7);
1097 gMC->SetClipBox(".");
37831078 1098 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1099 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1100 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1101 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1102 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
cfce8870 1103 gMC->DefaultRange();
1104 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1105 gMC->Gdhead(1111, "Time Projection Chamber");
1106 gMC->Gdman(18, 4, "MAN");
1107 gMC->Gdopt("hide","off");
fe4da5cc 1108}
1109
1110//_____________________________________________________________________________
1111void AliTPCv2::CreateMaterials()
1112{
1113 //
1114 // Define materials for version 2 of the Time Projection Chamber
1115 //
37831078 1116
fe4da5cc 1117 AliTPC::CreateMaterials();
1118}
1119
1120//_____________________________________________________________________________
1121void AliTPCv2::Init()
1122{
1123 //
1124 // Initialises version 2 of the TPC after that it has been built
1125 //
37831078 1126
1127 Int_t *idtmed = fIdtmed->GetArray();
1128
fe4da5cc 1129 AliTPC::Init();
d4c354b9 1130
c1637e41 1131
1132 fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected...
d4c354b9 1133
c1637e41 1134 fIDrift=gMC->VolId("TPC_Drift");
1135 fSecOld=-100; // fake number
fe4da5cc 1136
d9888f70 1137 gMC->SetMaxNStep(-30000); // max. number of steps increased
fe4da5cc 1138
4481461d 1139 if (fPrimaryIonisation) {
1140 gMC->Gstpar(idtmed[2],"PRIMIO_E", 20.77); // 1st ionisation potential
1141
1142 gMC->Gstpar(idtmed[2],"PRIMIO_N", 14.35);
1143 gMC->Gstpar(idtmed[2],"LOSS", 14); // specific energy loss
8143dfb2 1144 gMC->Gstpar(idtmed[2],"STRA",4);
4481461d 1145 } else {
1146 gMC->Gstpar(idtmed[2],"LOSS", 5); // specific energy loss
1147 }
1148
fe4da5cc 1149
f77f13c8 1150 AliInfo("*** TPC version 2 initialized ***");
1151 AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
fe4da5cc 1152
1153 //
1154
1155}
1156
1157//_____________________________________________________________________________
1158void AliTPCv2::StepManager()
1159{
1160 //
1161 // Called for every step in the Time Projection Chamber
1162 //
1163
1164 //
1165 // parameters used for the energy loss calculations
1166 //
73042f01 1167 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1168 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1169 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
fe4da5cc 1170
1171
73042f01 1172 const Float_t kbig = 1.e10;
fe4da5cc 1173
1174 Int_t id,copy;
e61fd20d 1175 Float_t hits[5];
fe4da5cc 1176 Int_t vol[2];
37831078 1177 TLorentzVector p;
fe4da5cc 1178
37831078 1179 vol[1]=0; // preset row number to 0
fe4da5cc 1180 //
b97617a6 1181 if (fPrimaryIonisation) gMC->SetMaxStep(kbig);
fe4da5cc 1182
0a6d8768 1183 if(!gMC->IsTrackAlive()) return; // particle has disappeared
fe4da5cc 1184
cfce8870 1185 Float_t charge = gMC->TrackCharge();
fe4da5cc 1186
1187 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1188
37831078 1189 // check the sensitive volume
1190
c1637e41 1191 id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1192 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
da33556f 1193
c1637e41 1194 gMC->TrackPosition(p);
1195 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1196 //
1197
1198 //
1199 Double_t angle = TMath::ACos(p[0]/r);
1200 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1201 //
1202 // angular segment, it is not a real sector number...
1203 //
1204 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1205 fTPCParam->GetInnerAngle());
1206 // rotate to segment "0"
1207 Float_t cos,sin;
1208 fTPCParam->AdjustCosSin(sector,cos,sin);
1209 Float_t x1=p[0]*cos + p[1]*sin;
1210 // check if within sector's limits
1211 if(x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp()
1212 ||x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp()){
1213 // calculate real sector number...
1214 if (x1>fTPCParam->GetOuterRadiusLow()){
1215 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1216 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1217 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
37831078 1218 }
c1637e41 1219 else
1220 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1221 //
1222 // here I have a sector number
1223 //
37831078 1224
c1637e41 1225 vol[0]=sector;
1226 // check if change of sector
1227 if(sector != fSecOld){
1228 fSecOld=sector;
1229 // add track reference
e6add757 1230 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
c1637e41 1231 }
1232 // track is in the sensitive strip
1233 if(id == fIdSens){
1234 // track is entering the strip
1235 if (gMC->IsTrackEntering()){
1236 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1237 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1238 // row numbers are autonomous for lower and upper sectors
1239 if(vol[0] > fTPCParam->GetNInnerSector()) {
1240 vol[1] -= fTPCParam->GetNRowLow();
1241 }
1242 //
1243 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
37831078 1244
c1637e41 1245 // lower sector, row 0, because Jouri wants to have this
6a905708 1246
c1637e41 1247 gMC->TrackMomentum(p);
1248 hits[0]=p[0];
1249 hits[1]=p[1];
1250 hits[2]=p[2];
1251 hits[3]=0.; // this hit has no energy loss
1252 // Get also the track time for pileup simulation
1253 hits[4]=gMC->TrackTime();
e61fd20d 1254
c1637e41 1255 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1256 }
1257 //
e61fd20d 1258
c1637e41 1259 gMC->TrackPosition(p);
1260 hits[0]=p[0];
1261 hits[1]=p[1];
1262 hits[2]=p[2];
1263 hits[3]=0.; // this hit has no energy loss
1264 // Get also the track time for pileup simulation
1265 hits[4]=gMC->TrackTime();
930ee558 1266
c1637e41 1267 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
37831078 1268
c1637e41 1269 }
1270 else return;
1271 }
37831078 1272 //-----------------------------------------------------------------
c1637e41 1273 // charged particle is in the sensitive drift volume
37831078 1274 //-----------------------------------------------------------------
cfce8870 1275 if(gMC->TrackStep() > 0) {
b97617a6 1276 Int_t nel=0;
1277 if (!fPrimaryIonisation) {
1278 nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1279 }
1280 else {
1281 Float_t edep = gMC->Edep();
1282 if (edep > 0.) nel = (Int_t)((gMC->Edep()*1.5)/kwIon) + 1;
1283 }
fe4da5cc 1284 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
c1637e41 1285 //
37831078 1286 gMC->TrackPosition(p);
1287 hits[0]=p[0];
1288 hits[1]=p[1];
1289 hits[2]=p[2];
fe4da5cc 1290 hits[3]=(Float_t)nel;
c1637e41 1291
fe4da5cc 1292 // Add this hit
c1637e41 1293
6a905708 1294 if (fHitType&&2){
1295 gMC->TrackMomentum(p);
1296 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1297 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
1298 fTrackHits->SetHitPrecision(precision);
1299 }
e61fd20d 1300
1301 // Get also the track time for pileup simulation
1302 hits[4]=gMC->TrackTime();
c1637e41 1303
1304 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
e61fd20d 1305
c1637e41 1306 } // step>0
1307 } //within sector's limits
fe4da5cc 1308 // Stemax calculation for the next step
1309
1310 Float_t pp;
0a6d8768 1311 TLorentzVector mom;
b97617a6 1312 // below is valid only for Geant3 (fPromaryIonisation not set)
1313 if(!fPrimaryIonisation){
1314 gMC->TrackMomentum(mom);
1315 Float_t ptot=mom.Rho();
1316 Float_t betaGamma = ptot/gMC->TrackMass();
595bf2c3 1317
b97617a6 1318 Int_t pid=gMC->TrackPid();
1319 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1320 {
1321 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1322 }
1323 else
1324 {
1325
1326 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
1327 pp=kprim*BetheBloch(betaGamma);
595bf2c3 1328
fe4da5cc 1329 }
1330
b97617a6 1331 Double_t rnd = gMC->GetRandom()->Rndm();
fe4da5cc 1332
b97617a6 1333 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1334 }
c1637e41 1335
fe4da5cc 1336}
1337
1338//_____________________________________________________________________________
1339Float_t AliTPCv2::BetheBloch(Float_t bg)
1340{
1341 //
1342 // Bethe-Bloch energy loss formula
1343 //
73042f01 1344 const Double_t kp1=0.76176e-1;
1345 const Double_t kp2=10.632;
1346 const Double_t kp3=0.13279e-4;
1347 const Double_t kp4=1.8631;
1348 const Double_t kp5=1.9479;
fe4da5cc 1349
1350 Double_t dbg = (Double_t) bg;
1351
1352 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1353
73042f01 1354 Double_t aa = TMath::Power(beta,kp4);
1355 Double_t bb = TMath::Power(1./dbg,kp5);
fe4da5cc 1356
73042f01 1357 bb=TMath::Log(kp3+bb);
fe4da5cc 1358
73042f01 1359 return ((Float_t)((kp2-aa-bb)*kp1/aa));
fe4da5cc 1360}
73042f01 1361
1362