1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
19 ///////////////////////////////////////////////////////////////////////////////
21 // Time Projection Chamber version 2 -- detailed TPC and slow simulation //
25 <img src="picts/AliTPCv2Class.gif">
30 ///////////////////////////////////////////////////////////////////////////////
34 #include <TLorentzVector.h>
38 #include "AliMathBase.h"
39 #include "AliTrackReference.h"
40 #include "AliTPCParam.h"
41 #include "AliTPCTrackHitsV2.h"
43 #include "AliGeomManager.h"
44 #include "TGeoVolume.h"
50 #include "TGeoCompositeShape.h"
52 #include "TGeoPhysicalNode.h"
53 #include "TGeoHalfSpace.h"
54 #include "TTreeStream.h"
61 //_____________________________________________________________________________
62 AliTPCv2::AliTPCv2(const char *name, const char *title) :
69 // Standard constructor for Time Projection Chamber version 2
73 SetBufferSize(128000);
77 // fTPCParam->Write(fTPCParam->GetTitle());
80 //_____________________________________________________________________________
81 void AliTPCv2::CreateGeometry()
84 // Create the geometry of Time Projection Chamber version 2
88 <img src="picts/AliTPC.gif">
93 <img src="picts/AliTPCv2Tree.gif">
97 //----------------------------------------------------------
98 // This geometry is written using TGeo class
99 // Firstly the shapes are defined, and only then the volumes
100 // What is recognized by the MC are volumes
101 //----------------------------------------------------------
103 // tpc - this will be the mother volume
107 // here I define a volume TPC
108 // retrive the medium name with "TPC_" as a leading string
110 TGeoPcon *tpc = new TGeoPcon(0.,360.,30); //30 sections
112 tpc->DefineSection(0,-289.6,77.,278.);
113 tpc->DefineSection(1,-262.1,77.,278.);
115 tpc->DefineSection(2,-262.1,83.1,278.);
116 tpc->DefineSection(3,-260.,83.1,278.);
118 tpc->DefineSection(4,-260.,70.,278.);
119 tpc->DefineSection(5,-259.6,70.,278.);
121 tpc->DefineSection(6,-259.6,68.1,278.);
122 tpc->DefineSection(7,-253.6,68.1,278.);
124 tpc->DefineSection(8,-253.6,67.88,278.);//hs
125 tpc->DefineSection(9,-74.0,60.68,278.);// hs
127 tpc->DefineSection(10,-74.0,60.1,278.);
128 tpc->DefineSection(11,-73.3,60.1,278.);
130 tpc->DefineSection(12,-73.3,56.9,278.);
131 tpc->DefineSection(13,-68.5,56.9,278.);
133 tpc->DefineSection(14,-68.5,60.,278.);
134 tpc->DefineSection(15,-64.7,60.,278.);
136 tpc->DefineSection(16,-64.7,56.9,278.);
137 tpc->DefineSection(17,73.3,56.9,278.);
139 tpc->DefineSection(18,73.3,60.1,278.);
140 tpc->DefineSection(19,74.0,60.1,278.);
142 tpc->DefineSection(20,74.0,60.68,278.);// hs
143 tpc->DefineSection(21,253.6,65.38,278.);// hs
145 tpc->DefineSection(22,253.6,65.6,278.);
146 tpc->DefineSection(23,259.6,65.6,278.);
148 tpc->DefineSection(24,259.6,70.0,278.);
149 tpc->DefineSection(25,260.,70.0,278.);
151 tpc->DefineSection(26,260.,83.1,278.);
152 tpc->DefineSection(27,262.1,83.1,278.);
154 tpc->DefineSection(28,262.1,77.,278);
155 tpc->DefineSection(29,289.6,77.,278.);
157 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
158 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
160 // drift volume - sensitive volume, extended beyond the
161 // endcaps, because of the alignment
163 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
164 dvol->DefineSection(0,-260.,74.5,264.4);
165 dvol->DefineSection(1,-253.6,74.5,264.4);
167 dvol->DefineSection(2,-253.6,76.6774,258.);
168 dvol->DefineSection(3,253.6,76.6774,258.);
170 dvol->DefineSection(4,253.6,74.5,264.4);
171 dvol->DefineSection(5,260.,74.5,264.4);
173 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_DriftGas2");
174 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
180 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
182 tpco->DefineSection(0,-256.6,264.8,278.);
183 tpco->DefineSection(1,-253.6,264.8,278.);
185 tpco->DefineSection(2,-253.6,258.,278.);
186 tpco->DefineSection(3,250.6,258.,278.);
188 tpco->DefineSection(4,250.6,258.,275.5);
189 tpco->DefineSection(5,253.6,258.,275.5);
191 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
192 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
194 TGeoRotation *segrot;//segment rotations
196 // outer containment vessel
198 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
200 tocv->DefineSection(0,-256.6,264.8,278.);
201 tocv->DefineSection(1,-253.6,264.8,278.);
203 tocv->DefineSection(2,-253.6,274.8124,278.);
204 tocv->DefineSection(3,247.6,274.8124,278.);
206 tocv->DefineSection(4,247.6,270.4,278.);
207 tocv->DefineSection(5,250.6,270.4,278.);
209 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
210 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
212 TGeoTubeSeg *to1 = new TGeoTubeSeg(274.8174,277.995,252.1,0.,59.9); //epoxy
213 TGeoTubeSeg *to2 = new TGeoTubeSeg(274.8274,277.985,252.1,0.,59.9); //tedlar
214 TGeoTubeSeg *to3 = new TGeoTubeSeg(274.8312,277.9812,252.1,0.,59.9);//prepreg2
215 TGeoTubeSeg *to4 = new TGeoTubeSeg(274.9062,277.9062,252.1,0.,59.9);//nomex
216 TGeoTubeSeg *tog5 = new TGeoTubeSeg(274.8174,277.995,252.1,59.9,60.);//epoxy
218 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
219 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
220 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
221 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
223 TGeoMedium *smep = gGeoManager->GetMedium("TPC_Epoxy1");
225 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
226 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
227 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
228 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
229 TGeoVolume *togv5 = new TGeoVolume("TPC_OCVG5",tog5,sm1);
231 TGeoMedium *mhs = gGeoManager->GetMedium("TPC_Steel");
232 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
233 //-------------------------------------------------------
234 // Tpc Outer Field Cage
235 // daughters - composite (sandwich)
236 //-------------------------------------------------------
238 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
240 tofc->DefineSection(0,-253.6,258.,269.6);
241 tofc->DefineSection(1,-250.6,258.,269.6);
243 tofc->DefineSection(2,-250.6,258.,260.0676);
244 tofc->DefineSection(3,250.6,258.,260.0676);
246 tofc->DefineSection(4,250.6,258.,275.5);
247 tofc->DefineSection(5,253.6,258.,275.5);
249 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
251 TGeoTubeSeg *tf1 = new TGeoTubeSeg(258.0,260.0676,252.1,0.,59.9); //tedlar
252 TGeoTubeSeg *tf2 = new TGeoTubeSeg(258.0038,260.0638,252.1,0.,59.9); //prepreg3
253 TGeoTubeSeg *tf3 = new TGeoTubeSeg(258.0338,260.0338,252.1,0.,59.9);//nomex
254 TGeoTubeSeg *tfg4 = new TGeoTubeSeg(258.0,260.0676,252.1,59.9,60.); //epoxy glue
256 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
258 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
259 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
260 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
261 TGeoVolume *tfg4v = new TGeoVolume("TPC_OFCG4",tfg4,smep);
263 // outer part - positioning
265 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);//ocv
267 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);//ofc
269 TGeoVolumeAssembly *t200 = new TGeoVolumeAssembly("TPC_OCVSEG");
270 TGeoVolumeAssembly *t300 = new TGeoVolumeAssembly("TPC_OFCSEG");
272 // assembly OCV and OFC
275 t200->AddNode(tov1,1); t200->AddNode(togv5,1);
276 t300->AddNode(tf1v,1); t300->AddNode(tfg4v,1);
277 // 2nd - rotation 60 deg
278 segrot = new TGeoRotation();
279 segrot->RotateZ(60.);
280 t200->AddNode(tov1,2,segrot); t200->AddNode(togv5,2,segrot);
281 t300->AddNode(tf1v,2,segrot); t300->AddNode(tfg4v,2,segrot);
282 // 3rd rotation 120 deg
283 segrot = new TGeoRotation();
284 segrot->RotateZ(120.);
285 t200->AddNode(tov1,3,segrot); t200->AddNode(togv5,3,segrot);
286 t300->AddNode(tf1v,3,segrot); t300->AddNode(tfg4v,3,segrot);
287 //4th rotation 180 deg
288 segrot = new TGeoRotation();
289 segrot->RotateZ(180.);
290 t200->AddNode(tov1,4,segrot); t200->AddNode(togv5,4,segrot);
291 t300->AddNode(tf1v,4,segrot); t300->AddNode(tfg4v,4,segrot);
292 //5th rotation 240 deg
293 segrot = new TGeoRotation();
294 segrot->RotateZ(240.);
295 t200->AddNode(tov1,5,segrot); t200->AddNode(togv5,5,segrot);
296 t300->AddNode(tf1v,5,segrot); t300->AddNode(tfg4v,5,segrot);
297 //6th rotation 300 deg
298 segrot = new TGeoRotation();
299 segrot->RotateZ(300.);
300 t200->AddNode(tov1,6,segrot); t200->AddNode(togv5,6,segrot);
301 t300->AddNode(tf1v,6,segrot); t300->AddNode(tfg4v,6,segrot);
303 v3->AddNode(t200,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(t300,1);
305 v2->AddNode(v3,1); v2->AddNode(v4,1);
308 //--------------------------------------------------------------------
309 // Tpc Inner INsulator (CO2)
310 // the cones, the central drum and the inner f.c. sandwich with a piece
311 // of the flane will be placed in the TPC
312 //--------------------------------------------------------------------
313 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
315 tpci->DefineSection(0,-253.6,68.4,76.6774);
316 tpci->DefineSection(1,-74.0,61.2,76.6774);
318 tpci->DefineSection(2,74.0,61.2,76.6774);
320 tpci->DefineSection(3,253.6,65.9,76.6774);
322 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
324 // now the inner field cage - only part of flanges (2 copies)
326 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
327 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
329 //---------------------------------------------------------
330 // Tpc Inner Containment vessel - Muon side
331 //---------------------------------------------------------
332 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
334 tcms->DefineSection(0,-259.1,68.1,74.2);
335 tcms->DefineSection(1,-253.6,68.1,74.2);
337 tcms->DefineSection(2,-253.6,68.1,68.4);
338 tcms->DefineSection(3,-74.0,60.9,61.2);
340 tcms->DefineSection(4,-74.0,60.1,61.2);
341 tcms->DefineSection(5,-73.3,60.1,61.2);
343 tcms->DefineSection(6,-73.3,56.9,61.2);
344 tcms->DefineSection(7,-73.0,56.9,61.2);
346 tcms->DefineSection(8,-73.0,56.9,58.8);
347 tcms->DefineSection(9,-71.3,56.9,58.8);
349 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
350 //------------------------------------------------
351 // Heat screen muon side
352 //------------------------------------------------
354 TGeoCone *thsm = new TGeoCone(89.8,67.88,68.1,60.68,60.9);
355 TGeoCone *thsmw = new TGeoCone(89.8,67.94,68.04,60.74,60.84);
356 TGeoVolume *hvsm = new TGeoVolume("TPC_HSM",thsm,mhs); //steel
357 TGeoVolume *hvsmw = new TGeoVolume("TPC_HSMW",thsmw,m12); //water
358 // assembly heat screen muon
359 hvsm->AddNode(hvsmw,1);
360 //-----------------------------------------------
361 // inner containment vessel - shaft side
362 //-----------------------------------------------
363 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
365 tcss->DefineSection(0,71.3,56.9,58.8);
366 tcss->DefineSection(1,73.0,56.9,58.8);
368 tcss->DefineSection(2,73.0,56.9,61.2);
369 tcss->DefineSection(3,73.3,56.9,61.2);
371 tcss->DefineSection(4,73.3,60.1,61.2);
372 tcss->DefineSection(5,74.0,60.1,61.2);
374 tcss->DefineSection(6,74.0,60.9,61.2);
375 tcss->DefineSection(7,253.6,65.6,65.9);
377 tcss->DefineSection(8,253.6,65.6,74.2);
378 tcss->DefineSection(9,258.1,65.6,74.2);
380 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
381 //-------------------------------------------------
382 // Heat screen shaft side
383 //--------------------------------------------------
384 TGeoCone *thss = new TGeoCone(89.8,60.68,60.9,65.38,65.6);
385 TGeoCone *thssw = new TGeoCone(89.8,60.74,60.84,65.44,65.54);
386 TGeoVolume *hvss = new TGeoVolume("TPC_HSS",thss,mhs); //steel
387 TGeoVolume *hvssw = new TGeoVolume("TPC_HSSW",thssw,m12); //water
388 //assembly heat screen shaft
389 hvss->AddNode(hvssw,1);
390 //-----------------------------------------------
392 // define 4 parts and make an assembly
393 //-----------------------------------------------
394 // part1 - Al - 2 copies
395 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
396 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
397 // sandwich - outermost parts - 2 copies
401 TGeoTubeSeg *t2 = new TGeoTubeSeg(76.6774,78.845,74.175,350.,109.4); // tedlar 38 microns
402 TGeoTubeSeg *t3 = new TGeoTubeSeg(76.6812,78.8412,74.175,350.,109.4); // prepreg2 500 microns
403 TGeoTubeSeg *t4 = new TGeoTubeSeg(76.7312,78.7912,74.175,350.,109.4); // prepreg3 300 microns
404 TGeoTubeSeg *t5 = new TGeoTubeSeg(76.7612,78.7612,74.175,350.,109.4); // nomex 2 cm
405 TGeoTubeSeg *tepox1 = new TGeoTubeSeg(76.6774,78.845,74.175,109.4,110.);//epoxy
406 TGeoTubeSeg *tpr1 = new TGeoTubeSeg(78.845,78.885,74.175,109.,111.);
408 // volumes for the outer part
409 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
410 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
411 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
412 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
413 TGeoVolume *tvep1 = new TGeoVolume("TPC_IFEPOX1",tepox1,smep);
414 TGeoVolume *tvpr1 = new TGeoVolume("TPC_PRSTR1",tpr1,sm2);
416 // middle parts - 2 copies
420 TGeoTubeSeg *t6 = new TGeoTubeSeg(76.6774,78.795,5.,350.,109.4); // tedlar 38 microns
421 TGeoTubeSeg *t7 = new TGeoTubeSeg(76.6812,78.7912,5.,350.,109.4); // prepreg2 250 microns
422 TGeoTubeSeg *t8 = new TGeoTubeSeg(76.7062,78.7662,5.,350.,109.4); // prepreg3 300 microns
423 TGeoTubeSeg *t9 = new TGeoTubeSeg(76.7362,78.7362,5.,350.,109.4); // nomex 2 cm
424 TGeoTubeSeg *tepox2 = new TGeoTubeSeg(76.6774,78.795,5.,109.4,110.);//epoxy
425 TGeoTubeSeg *tpr2 = new TGeoTubeSeg(78.795,78.835,5.,109.,111.);
426 // volumes for the middle part
427 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
428 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
429 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
430 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
431 TGeoVolume *tvep2 = new TGeoVolume("TPC_IFEPOX2",tepox2,smep);
432 TGeoVolume *tvpr2 = new TGeoVolume("TPC_PRSTR2",tpr2,sm2);
433 // central part - 1 copy
435 // segment central part
437 TGeoTubeSeg *t10 = new TGeoTubeSeg(76.6774,78.785,93.75,350.,109.4); // tedlar 38 microns
438 TGeoTubeSeg *t11 = new TGeoTubeSeg(76.6812,78.7812,93.75,350.,109.4); // prepreg3 500 microns
439 TGeoTubeSeg *t12 = new TGeoTubeSeg(76.7312,78.7312,93.75,350.,109.4); // nomex 2 cm
440 TGeoTubeSeg *tepox3 = new TGeoTubeSeg(76.6774,78.785,93.75,109.4,110.);//epoxy
441 TGeoTubeSeg *tpr3 = new TGeoTubeSeg(78.785,78.825,93.75,109.,111.);
442 // volumes for the central part
443 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
444 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
445 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
446 TGeoVolume *tvep3 = new TGeoVolume("TPC_IFEPOX3",tepox3,smep);
447 TGeoVolume *tvpr3 = new TGeoVolume("TPC_PRSTR3",tpr3,sm2);
449 // creating a sandwich for the outer par,t tv2 is the mother
451 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
453 // creating a sandwich for the middle part, tv6 is the mother
455 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
457 // creating a sandwich for the central part, tv10 is the mother
459 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
461 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC"); // ifc itself - 3 segments
464 // first segment - no rotation
467 tv100->AddNode(tv10,1); //sandwich
468 tv100->AddNode(tvep3,1);//epoxy
469 tv100->AddNode(tvpr3,1);//prepreg strip
471 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75)); //sandwich1
472 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75)); // sandwich2
473 tv100->AddNode(tvep2,1,new TGeoTranslation(0.,0.,-98.75)); //epoxy
474 tv100->AddNode(tvep2,2,new TGeoTranslation(0.,0.,98.75)); //epoxy
475 tv100->AddNode(tvpr2,1,new TGeoTranslation(0.,0.,-98.75));//prepreg strip
476 tv100->AddNode(tvpr2,2,new TGeoTranslation(0.,0.,98.75));
478 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925)); //sandwich
479 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
480 tv100->AddNode(tvep1,1,new TGeoTranslation(0.,0.,-177.925)); //epoxy
481 tv100->AddNode(tvep1,2,new TGeoTranslation(0.,0.,177.925));
482 tv100->AddNode(tvpr1,1,new TGeoTranslation(0.,0.,-177.925));//prepreg strip
483 tv100->AddNode(tvpr1,2,new TGeoTranslation(0.,0.,-177.925));
485 // second segment - rotation 120 deg.
487 segrot = new TGeoRotation();
488 segrot->RotateZ(120.);
491 tv100->AddNode(tv10,2,segrot); //sandwich
492 tv100->AddNode(tvep3,2,segrot);//epoxy
493 tv100->AddNode(tvpr3,2,segrot);//prepreg strip
495 tv100->AddNode(tv6,3,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //sandwich1
496 tv100->AddNode(tv6,4,new TGeoCombiTrans(0.,0.,98.75,segrot)); // sandwich2
497 tv100->AddNode(tvep2,3,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //epoxy
498 tv100->AddNode(tvep2,4,new TGeoCombiTrans(0.,0.,98.75,segrot)); //epoxy
499 tv100->AddNode(tvpr2,3,new TGeoCombiTrans(0.,0.,-98.75,segrot));//prepreg strip
500 tv100->AddNode(tvpr2,4,new TGeoCombiTrans(0.,0.,98.75,segrot));
502 tv100->AddNode(tv2,3,new TGeoCombiTrans(0.,0.,-177.925,segrot));//sandwich
503 tv100->AddNode(tv2,4,new TGeoCombiTrans(0.,0.,177.925,segrot));
504 tv100->AddNode(tvep1,3,new TGeoCombiTrans(0.,0.,-177.925,segrot));//epoxy
505 tv100->AddNode(tvep1,4,new TGeoCombiTrans(0.,0.,177.925,segrot));
506 tv100->AddNode(tvpr1,3,new TGeoCombiTrans(0.,0.,-177.925,segrot));//prepreg strip
507 tv100->AddNode(tvpr1,4,new TGeoCombiTrans(0.,0.,177.925,segrot));
509 // third segment - rotation 240 deg.
511 segrot = new TGeoRotation();
512 segrot->RotateZ(240.);
515 tv100->AddNode(tv10,3,segrot); //sandwich
516 tv100->AddNode(tvep3,3,segrot);//epoxy
517 tv100->AddNode(tvpr3,3,segrot);//prepreg strip
519 tv100->AddNode(tv6,5,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //sandwich1
520 tv100->AddNode(tv6,6,new TGeoCombiTrans(0.,0.,98.75,segrot)); // sandwich2
521 tv100->AddNode(tvep2,5,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //epoxy
522 tv100->AddNode(tvep2,6,new TGeoCombiTrans(0.,0.,98.75,segrot)); //epoxy
523 tv100->AddNode(tvpr2,5,new TGeoCombiTrans(0.,0.,-98.75,segrot));//prepreg strip
524 tv100->AddNode(tvpr2,6,new TGeoCombiTrans(0.,0.,98.75,segrot));
526 tv100->AddNode(tv2,5,new TGeoCombiTrans(0.,0.,-177.925,segrot));//sandwich
527 tv100->AddNode(tv2,6,new TGeoCombiTrans(0.,0.,177.925,segrot));
528 tv100->AddNode(tvep1,5,new TGeoCombiTrans(0.,0.,-177.925,segrot));//epoxy
529 tv100->AddNode(tvep1,6,new TGeoCombiTrans(0.,0.,177.925,segrot));
530 tv100->AddNode(tvpr1,5,new TGeoCombiTrans(0.,0.,-177.925,segrot));//prepreg strip
531 tv100->AddNode(tvpr1,6,new TGeoCombiTrans(0.,0.,177.925,segrot));
533 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
534 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
536 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
537 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
538 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
539 v1->AddNode(hvsm,1,new TGeoTranslation(0.,0.,-163.8));
540 v1->AddNode(hvss,1,new TGeoTranslation(0.,0.,163.8));
541 v9->AddNode(tv100,1);
547 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
548 cfl->DefineSection(0,-71.1,59.7,61.2);
549 cfl->DefineSection(1,-68.6,59.7,61.2);
551 cfl->DefineSection(2,-68.6,60.6124,61.2);
552 cfl->DefineSection(3,68.6,60.6124,61.2);
554 cfl->DefineSection(4,68.6,59.7,61.2);
555 cfl->DefineSection(5,71.1,59.7,61.2);
557 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
559 TGeoTubeSeg *cd1 = new TGeoTubeSeg(60.6224,61.19,71.1,0.2,119.8);
560 TGeoTubeSeg *cd2 = new TGeoTubeSeg(60.6262,61.1862,71.1,0.2,119.8);
561 TGeoTubeSeg *cd3 = new TGeoTubeSeg(60.6462,61.1662,71.1,0.2,119.8);
562 TGeoTubeSeg *cd4 = new TGeoTubeSeg(60.6562,61.1562,71.1,0.2,119.8);
563 TGeoTubeSeg *tepox4 = new TGeoTubeSeg(60.6224,61.19,71.1,359.8,0.2);
565 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
566 TGeoMedium *sm8 = gGeoManager->GetMedium("TPC_Epoxyfm");
567 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
568 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
569 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm8); //epoxy film
570 TGeoVolume *cd4v = new TGeoVolume("TPC_CDR4",cd4,sm4); //nomex
571 TGeoVolume *tvep4 = new TGeoVolume("TPC_IFEPOX4",tepox4,smep);
574 // seals for central drum 2 copies
576 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
577 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
578 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
579 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
580 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
583 TGeoPcon *se = new TGeoPcon(0.,360.,6);
584 se->DefineSection(0,-72.8,59.7,61.2);
585 se->DefineSection(1,-72.3,59.7,61.2);
587 se->DefineSection(2,-72.3,58.85,61.2);
588 se->DefineSection(3,-71.6,58.85,61.2);
590 se->DefineSection(4,-71.6,59.7,61.2);
591 se->DefineSection(5,-71.3,59.7,61.2);
593 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
595 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
596 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
598 // define reflection matrix
600 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
602 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cd3v->AddNode(cd4v,1); //sandwich
604 cflv->AddNode(cd1v,1); cflv->AddNode(tvep4,1);
606 segrot = new TGeoRotation();
607 segrot->RotateZ(120.);
608 cflv->AddNode(cd1v,2,segrot); cflv->AddNode(tvep4,2,segrot);
610 segrot = new TGeoRotation();
611 segrot->RotateZ(240.);
612 cflv->AddNode(cd1v,3,segrot); cflv->AddNode(tvep4,3,segrot);
614 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
615 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
616 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
618 // central membrane - 2 rings and a mylar membrane - assembly
620 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
621 TGeoTube *oh = new TGeoTube(250.,256.,0.5);
622 TGeoTube *mem = new TGeoTube(84.05,250.,0.00115);
625 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
627 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
628 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
630 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
632 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
639 // end caps - they are make as an assembly of single segments
640 // containing both readout chambers
642 Double_t openingAngle = 10.*TMath::DegToRad();
643 Double_t thick=1.5; // rib
644 Double_t shift = thick/TMath::Sin(openingAngle);
646 Double_t lowEdge = 86.3; // hole in the wheel
647 Double_t upEdge = 240.4; // hole in the wheel
649 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
651 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
653 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
654 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
656 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
657 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
659 Double_t ys = shift*TMath::Sin(openingAngle);
660 Double_t xs = shift*TMath::Cos(openingAngle);
661 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
662 tr->RegisterYourself();
663 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
664 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
665 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
666 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
667 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
668 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
669 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
671 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
677 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
678 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
680 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
681 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
682 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
684 Double_t tga = (19.8328-12.3742)/39.3;
686 xmin = 9.55*tga+12.3742;
687 xmax = 9.95*tga+12.3742;
688 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
689 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
690 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
691 xmin=19.4*tga+12.3742;
692 xmax=19.9*tga+12.3742;
693 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
694 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
695 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
696 xmin=29.35*tga+12.3742;
697 xmax=29.75*tga+12.3742;
698 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
699 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
700 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
702 // holes for connectors
704 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
705 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
706 TString fileName(gSystem->Getenv("ALICE_ROOT"));
707 fileName += "/TPC/conn_iroc.dat";
709 in.open(fileName.Data(), ios_base::in); // asci file
710 TGeoRotation *rrr[86];
711 for(Int_t i =0;i<86;i++){
716 rrr[i]= new TGeoRotation();
717 rrr[i]->RotateY(ang);
718 ibdv->AddNode(connv,i+1,new TGeoCombiTrans(x,y,z,rrr[i]));
722 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
724 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
725 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
726 tr1->RegisterYourself();
727 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
728 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
730 // pad plane and wire fixations
732 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
733 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
734 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
735 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
736 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
737 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
739 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
741 iroc->AddNode(ibdv,1);
742 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
743 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
744 tga =(23.3521-14.5974)/49.65;
745 Double_t xx = 24.825*tga+14.5974-0.6;
746 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
747 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
751 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
752 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
753 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
754 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
755 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
757 tga=(38.5084-20.2938)/99.3;
758 xmin=tga*10.2+20.2938;
759 xmax=tga*10.6+20.2938;
760 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
761 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
763 xmin=22.55*tga+20.2938;
764 xmax=24.15*tga+20.2938;
765 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
766 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
768 xmin=36.1*tga+20.2938;
769 xmax=36.5*tga+20.2938;
770 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
771 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
773 xmin=49.0*tga+20.2938;
774 xmax=50.6*tga+20.2938;
775 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
776 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
778 xmin=63.6*tga+20.2938;
779 xmax=64.0*tga+20.2938;
780 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
781 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
783 xmin=75.5*tga+20.2938;
784 xmax=77.15*tga+20.2938;
785 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
786 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
788 xmin=88.7*tga+20.2938;
789 xmax=89.1*tga+20.2938;
790 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
791 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
793 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
794 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
795 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
796 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
797 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
798 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
799 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
801 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
802 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
803 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
804 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
805 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
807 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
808 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
809 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
810 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
811 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
813 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
814 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
815 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
816 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
817 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
818 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
819 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
820 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
822 // holes for connectors
824 fileName = gSystem->Getenv("ALICE_ROOT");
825 fileName += "/TPC/conn_oroc.dat";
826 in.open(fileName.Data(), ios_base::in); // asci file
827 TGeoRotation *rr[78];
828 for(Int_t i =0;i<78;i++){
831 Double_t x1,z1,x2,z2;
833 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
834 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
836 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
838 rr[i]= new TGeoRotation();
843 obdv->AddNode(connv,i+1,new TGeoCombiTrans(x1,y,z1,rr[i]));
844 obdv->AddNode(connv,i+79,new TGeoCombiTrans(x2,y,z2,rr[i]));
848 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
849 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
850 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
851 tr5->RegisterYourself();
852 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
853 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
855 // pad plane and wire fixations
857 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
858 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
860 tga=(43.5239-23.3874)/114.2;
861 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
862 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
863 xx = 57.1*tga+23.3874-0.7;
864 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
865 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
867 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
869 oroc->AddNode(obdv,1);
870 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
871 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
872 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
873 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
875 // now iroc and oroc are placed into a sector...
877 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
878 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
879 TGeoRotation rot1("rot1",90.,90.,0.);
880 TGeoRotation rot2("rot2");
882 TGeoRotation *rot = new TGeoRotation("rot");
886 x0=110.2*TMath::Cos(openingAngle);
887 y0=110.2*TMath::Sin(openingAngle);
888 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
889 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
890 x0=188.45*TMath::Cos(openingAngle);
891 y0=188.45*TMath::Sin(openingAngle);
892 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
893 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
898 secta->AddNode(ch,1);
899 secta->AddNode(iroc,1,combi1a);
900 secta->AddNode(oroc,1,combi2a);
904 sectc->AddNode(ch,1);
905 sectc->AddNode(iroc,1,combi1c);
906 sectc->AddNode(oroc,1,combi2c);
908 // now I try to make wheels...
910 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
911 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
913 TGeoRotation *rwh[18];
914 for(Int_t i =0;i<18;i++){
915 Double_t phi = (20.*i);
916 rwh[i]=new TGeoRotation();
917 rwh[i]->RotateZ(phi);
918 wheela->AddNode(secta,i+1,rwh[i]);
919 wheelc->AddNode(sectc,i+1,rwh[i]);
922 // wheels in the drift volume!
924 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
925 v9->AddNode(wheela,1,combi3);
926 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
927 //_____________________________________________________________
928 // service support wheel
929 //_____________________________________________________________
930 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
931 sw->DefineSection(0,-4.,80.5,251.75);
932 sw->DefineSection(1,4.,80.5,251.75);
933 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
936 shift = thick/TMath::Sin(openingAngle);
937 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
938 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
939 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
940 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
942 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
943 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
944 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
945 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
946 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
951 ys = shift*TMath::Sin(openingAngle);
952 xs = shift*TMath::Cos(openingAngle);
953 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
955 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
956 co->DefineSection(0,-0.5,77.,255.25);
957 co->DefineSection(1,0.5,77.,255.25);
958 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
960 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
961 shift=4./TMath::Sin(openingAngle);
962 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
963 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
965 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
967 ys = shift*TMath::Sin(openingAngle);
968 xs = shift*TMath::Cos(openingAngle);
969 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
971 // Sector as an Assembly
973 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
974 swhs->AddNode(swv,1);
975 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
976 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
978 // SSW as an Assembly of sectors
980 TGeoRotation *rsw[18];
981 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
982 for(Int_t i =0;i<18;i++){
983 Double_t phi = (20.*i);
984 rsw[i] = new TGeoRotation();
985 rsw[i]->RotateZ(phi);
986 swheel->AddNode(swhs,i+1,rsw[i]);
988 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
989 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
991 // sensitive strips - strip "0" is always set
994 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
997 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
998 upar=new Double_t [10];
1007 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
1014 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
1015 gGeoManager->Node("TPC_Strip",totrows+1,
1016 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
1018 // now, strips optionally
1022 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
1023 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
1028 gGeoManager->Node("TPC_Strip",i,
1029 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
1030 gGeoManager->Node("TPC_Strip",totrows+i,
1031 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
1034 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
1035 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
1040 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
1041 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
1042 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
1043 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
1046 //----------------------------------------------------------
1047 // TPC Support Rods - MAKROLON
1048 //----------------------------------------------------------
1049 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
1050 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
1051 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
1052 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");;
1053 TGeoMedium *m13 = gGeoManager->GetMedium("TPC_Brass");
1055 // tpc rod is an assembly of 10 long parts and 2 short parts
1056 // connected with alu rings and plagged on both sides.
1061 TGeoPcon *rod = new TGeoPcon("rod",0.,360.,6);
1062 rod->DefineSection(0,-10.43,1.92,2.08);
1063 rod->DefineSection(1,-9.75,1.92,2.08);
1065 rod->DefineSection(2,-9.75,1.8,2.2);
1066 rod->DefineSection(3,9.75,1.8,2.2);
1068 rod->DefineSection(4,9.75,1.92,2.08);
1069 rod->DefineSection(5,10.43,1.92,2.08);
1071 TGeoVolume *mrodl = new TGeoVolume("TPC_mrodl",rod,m6);
1075 TGeoPcon *rod1 = new TGeoPcon("rod1",0.,360.,6);
1076 rod1->DefineSection(0,-8.93,1.92,2.08);
1077 rod1->DefineSection(1,-8.25,1.92,2.08);
1079 rod1->DefineSection(2,-8.25,1.8,2.2);
1080 rod1->DefineSection(3,8.25,1.8,2.2);
1082 rod1->DefineSection(4,8.25,1.92,2.08);
1083 rod1->DefineSection(5,8.93,1.92,2.08);
1085 TGeoVolume *mrods = new TGeoVolume("TPC_mrods",rod1,m6);
1087 // below is for the resistor rod
1089 // hole for the brass connectors
1092 new TGeoTube("hhole",0.,0.3,0.3);
1094 //transformations for holes - initialy they
1095 // are placed at x=0 and negative y
1097 TGeoRotation *rhole = new TGeoRotation();
1098 rhole->RotateX(90.);
1099 TGeoCombiTrans *transf[13];
1101 for(Int_t i=0;i<13;i++){
1102 //sprintf(name,"transf%d",i);
1103 snprintf(name,30,"transf%d",i);
1104 transf[i]= new TGeoCombiTrans(name,0.,-2.,-9.+i*1.5,rhole);
1105 transf[i]->RegisterYourself();
1107 // union expression for holes
1108 TString operl("hhole:transf0");
1109 for (Int_t i=1;i<13;i++){
1110 //sprintf(name,"+hhole:transf%d",i);
1111 snprintf(name,30,"+hhole:transf%d",i);
1115 TString opers("hhole:transf1");
1116 for (Int_t i=2;i<12;i++){
1117 //sprintf(name,"+hhole:transf%d",i);
1118 snprintf(name,30,"+hhole:transf%d",i);
1122 new TGeoCompositeShape("hlv",operl.Data());
1123 new TGeoCompositeShape("hsv",opers.Data());
1125 TGeoCompositeShape *rodl = new TGeoCompositeShape("rodl","rod-hlv");
1126 TGeoCompositeShape *rods = new TGeoCompositeShape("rods","rod1-hsv");
1127 //rods - volumes - makrolon rods with holes
1128 TGeoVolume *rodlv = new TGeoVolume("TPC_rodl",rodl,m6);
1129 TGeoVolume *rodsv = new TGeoVolume("TPC_rods",rods,m6);
1132 TGeoTube *bcon = new TGeoTube(0.,0.3,0.3);//connectors
1133 TGeoVolume *bconv = new TGeoVolume("TPC_bcon",bcon,m13);
1135 // hooks holding strips
1137 new TGeoBBox("hk1",0.625,0.015,0.75);
1138 new TGeoBBox("hk2",0.625,0.015,0.15);
1139 TGeoTranslation *tr21 = new TGeoTranslation("tr21",0.,-0.03,-0.6);
1140 TGeoTranslation *tr12 = new TGeoTranslation("tr12",0.,-0.03,0.6);
1141 tr21->RegisterYourself();
1142 tr12->RegisterYourself();
1144 TGeoCompositeShape *hook = new TGeoCompositeShape("hook","hk1+hk2:tr21+hk2:tr12");
1145 TGeoVolume *hookv = new TGeoVolume("TPC_hook",hook,m13);
1147 // assembly of the short rod with connectors and hooks
1152 TGeoVolumeAssembly *spart = new TGeoVolumeAssembly("TPC_spart");
1154 spart->AddNode( rodsv,1);
1155 for(Int_t i=1;i<12;i++){
1156 spart->AddNode(bconv,i,transf[i]);
1158 for(Int_t i =0;i<11;i++){
1159 spart->AddNode(hookv,i+1,new TGeoTranslation(0.,-2.315,-7.5+i*1.5));
1164 TGeoVolumeAssembly *lpart = new TGeoVolumeAssembly("TPC_lpart");
1166 lpart->AddNode( rodlv,1);
1167 for(Int_t i=0;i<13;i++){
1168 lpart->AddNode(bconv,i+12,transf[i]);
1170 for(Int_t i =0;i<13;i++){
1171 lpart->AddNode(hookv,i+12,new TGeoTranslation(0.,-2.315,-9.+i*1.5));
1176 new TGeoTube("ring1",2.1075,2.235,0.53);
1177 new TGeoTube("ring2",1.7925,1.89,0.43);
1178 new TGeoTube("ring3",1.89,2.1075,0.05);
1179 TGeoCompositeShape *ring = new TGeoCompositeShape("ring","ring1+ring2+ring3");
1180 TGeoVolume *ringv = new TGeoVolume("TPC_ring",ring,m3);
1184 TGeoVolumeAssembly *tpcrrod = new TGeoVolumeAssembly("TPC_rrod");//rrod
1185 TGeoVolumeAssembly *tpcmrod = new TGeoVolumeAssembly("TPC_mrod");//makrolon rod
1187 for(Int_t i=0;i<11;i++){
1188 tpcrrod->AddNode(ringv,i+1,new TGeoTranslation(0.,0.,-105.+i*21));
1189 tpcmrod->AddNode(ringv,i+12,new TGeoTranslation(0.,0.,-105.+i*21));
1191 for(Int_t i=0;i<10;i++){
1192 tpcrrod->AddNode(lpart,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));//resistor rod
1193 tpcmrod->AddNode(mrodl,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));//makrolon rod
1196 // right plug - identical for all rods
1198 TGeoPcon *tpcrp = new TGeoPcon(0.,360.,6);
1200 tpcrp->DefineSection(0,123.05,1.89,2.1075);
1201 tpcrp->DefineSection(1,123.59,1.89,2.1075);
1203 tpcrp->DefineSection(2,123.59,1.8,2.2);
1204 tpcrp->DefineSection(3,127.,1.8,2.2);
1206 tpcrp->DefineSection(4,127.,0.,2.2);
1207 tpcrp->DefineSection(5,127.5,0.,2.2);
1209 TGeoVolume *tpcrpv = new TGeoVolume("TPC_RP",tpcrp,m6);
1211 // adding short pieces and right plug
1213 tpcrrod->AddNode(spart,1,new TGeoTranslation(0.,0.,-114.));
1214 tpcrrod->AddNode(spart,2,new TGeoTranslation(0.,0.,114.));
1215 tpcrrod->AddNode(ringv,23,new TGeoTranslation(0.,0.,-123.));
1216 tpcrrod->AddNode(ringv,24,new TGeoTranslation(0.,0.,123.));
1217 tpcrrod->AddNode(tpcrpv,1);
1219 tpcmrod->AddNode(mrods,1,new TGeoTranslation(0.,0.,-114.));
1220 tpcmrod->AddNode(mrods,2,new TGeoTranslation(0.,0.,114.));
1221 tpcmrod->AddNode(ringv,25,new TGeoTranslation(0.,0.,-123.));
1222 tpcmrod->AddNode(ringv,26,new TGeoTranslation(0.,0.,123.));
1223 tpcmrod->AddNode(tpcrpv,2);
1225 // from the ringv position to the CM is 3.0 cm!
1226 //----------------------------------------
1229 //HV rods - makrolon + 0.58cm (diameter) Cu ->check the length
1230 TGeoTube *hvr = new TGeoTube(0.,1.465,123.);
1231 TGeoTube *hvc = new TGeoTube(0.,0.29,123.);
1233 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
1234 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
1235 hvrv->AddNode(hvcv,1);
1239 TGeoTube *cr = new TGeoTube(0.,0.45,123.);
1240 TGeoTube *cw = new TGeoTube(0.,0.15,123.);
1241 TGeoVolume *crv = new TGeoVolume("TPC_CR",cr,m10);
1242 TGeoVolume *cwv = new TGeoVolume("TPC_W",cw,m12);
1244 // ceramic rod with water
1246 crv->AddNode(cwv,1);
1250 TGeoTube *pr =new TGeoTube(0.2,0.35,123.);
1251 TGeoVolume *prv = new TGeoVolume("TPC_PR",pr,m11);
1253 // copper plates with connectors
1255 new TGeoTube("tub",0.,1.7,0.025);
1257 // half space - points on the plane and a normal vector
1260 Double_t slope = TMath::Tan(22.*TMath::DegToRad());
1261 Double_t intp = 1.245;
1263 Double_t b = slope*slope+1.;
1272 norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
1276 new TGeoHalfSpace("sp1",p,n);
1285 norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
1289 new TGeoHalfSpace("sp2",p,n);
1292 new TGeoTube("h1",0.,0.5,0.025);
1293 new TGeoTube("h2",0.,0.35,0.025);
1295 TGeoTranslation *ttr11 = new TGeoTranslation("ttr11",-0.866,0.5,0.);
1296 TGeoTranslation *ttr22 = new TGeoTranslation("ttr22",0.866,0.5,0.);
1297 ttr11->RegisterYourself();
1298 ttr22->RegisterYourself();
1299 // elastic connector
1300 new TGeoBBox("elcon",0.72,0.005,0.3);
1301 TGeoRotation *crr1 = new TGeoRotation();
1302 crr1->RotateZ(-22.);
1303 TGeoCombiTrans *ctr1 = new TGeoCombiTrans("ctr1",-0.36011, -1.09951,-0.325,crr1);
1304 ctr1->RegisterYourself();
1305 TGeoCompositeShape *cs1 = new TGeoCompositeShape("cs1",
1306 "(((((tub-h1:ttr11)-h1:ttr22)-sp1)-sp2)-h2)+elcon:ctr1");
1308 TGeoVolume *csvv = new TGeoVolume("TPC_RR_CU",cs1,m7);
1310 // resistor rod assembly 2 ceramic rods, peak rod, Cu plates
1313 TGeoVolumeAssembly *rrod = new TGeoVolumeAssembly("TPC_RRIN");
1315 rrod->AddNode(crv,1,ttr11);
1316 rrod->AddNode(crv,2,ttr22);
1317 rrod->AddNode(prv,1);
1319 for(Int_t i=0;i<165;i++){
1320 rrod->AddNode(csvv,i+1,new TGeoTranslation(0.,0.,-122.675+i*1.5));
1323 TGeoTube *res = new TGeoTube(0.,0.15,0.5);
1324 TGeoVolume *resv = new TGeoVolume("TPC_RES",res,m10);
1325 TGeoVolumeAssembly *ress = new TGeoVolumeAssembly("TPC_RES_CH");
1326 ress->AddNode(resv,1,new TGeoTranslation(0.2,0.,0.));
1327 ress->AddNode(resv,2,new TGeoTranslation(-0.2,0.,0.));
1329 TGeoRotation *crr2 = new TGeoRotation();
1331 TGeoRotation *crr3 = new TGeoRotation();
1332 crr3->RotateY(-30.);
1334 for(Int_t i=0;i<164;i+=2){
1335 rrod->AddNode(ress,i+1, new TGeoCombiTrans(0.,1.2,-121.925+i*1.5,crr2));
1336 rrod->AddNode(ress,i+2, new TGeoCombiTrans(0.,1.2,-121.925+(i+1)*1.5,crr3));
1339 tpcrrod->AddNode(rrod,1,new TGeoCombiTrans(0.,0.,0.5,crr1));
1341 // rod left head with holders - inner
1343 // first element - support for inner holder TPC_IHS
1344 Double_t shift1[3] = {0.0,-0.175,0.0};
1346 new TGeoBBox("tpcihs1", 4.7, 0.66, 2.35);
1347 new TGeoBBox("tpcihs2", 4.7, 0.485, 1.0, shift1);
1348 new TGeoBBox("tpcihs3", 1.5, 0.485, 2.35, shift1);
1349 new TGeoTube("tpcihs4", 0.0, 2.38, 0.1);
1351 Double_t pointstrap[16];
1355 pointstrap[3]= 1.08;
1357 pointstrap[5]= 1.08;
1358 pointstrap[6]= 3.38;
1362 pointstrap[10]= 0.0;
1363 pointstrap[11]= 1.08;
1364 pointstrap[12]= 2.3;
1365 pointstrap[13]= 1.08;
1366 pointstrap[14]= 3.38;
1367 pointstrap[15]= 0.0;
1369 TGeoArb8 *tpcihs5 = new TGeoArb8("tpcihs5", 0.6, pointstrap);
1371 // half space - cutting "legs"
1381 new TGeoHalfSpace("cutil1", p, n);
1386 TGeoTranslation *trans2 = new TGeoTranslation("trans2", 0.0, 2.84, 2.25);
1387 trans2->RegisterYourself();
1388 TGeoTranslation*trans3= new TGeoTranslation("trans3", 0.0, 2.84, -2.25);
1389 trans3->RegisterYourself();
1390 //support - composite volume
1392 TGeoCompositeShape *tpcihs6 = new TGeoCompositeShape("tpcihs6", "tpcihs1-(tpcihs2+tpcihs3)-(tpcihs4:trans2)-(tpcihs4:trans3)-cutil1");
1394 // volumes - all makrolon
1396 TGeoVolume *tpcihss = new TGeoVolume("TPC_IHSS", tpcihs6, m6); //support
1397 TGeoVolume *tpcihst = new TGeoVolume("TPC_IHSTR",tpcihs5 , m6); //trapesoid
1399 TGeoRotation *rot111 = new TGeoRotation();
1400 rot111->RotateY(180.0);
1402 TGeoVolumeAssembly *tpcihs = new TGeoVolumeAssembly("TPC_IHS"); // assembly of the support
1403 tpcihs->AddNode(tpcihss, 1);
1404 tpcihs->AddNode(tpcihst, 1, new TGeoTranslation(-4.7, 0.66, 0.0));
1405 tpcihs->AddNode(tpcihst, 2, new TGeoCombiTrans(4.7, 0.66, 0.0, rot111));
1407 // two rod holders (TPC_IRH) assembled with the support
1409 new TGeoBBox("tpcirh1", 4.7, 1.33, 0.5);
1413 new TGeoBBox("tpcirh2", 1.05, 0.8, 0.5, shift1);
1417 new TGeoBBox("tpcirh3", 1.05, 0.8, 0.5, shift1);
1421 new TGeoBBox("tpcirh4", 1.9, 0.25, 0.5, shift1);
1422 new TGeoTube("tpcirh5", 0, 1.9, 5);
1424 TGeoTranslation *trans4 = new TGeoTranslation("trans4", 0, 0.83, 0.0);
1425 trans4->RegisterYourself();
1427 TGeoCompositeShape *tpcirh6 = new TGeoCompositeShape("tpcirh6", "tpcirh1-tpcirh2-tpcirh3-(tpcirh5:trans4)-tpcirh4");
1431 TGeoVolume *tpcirh = new TGeoVolume("TPC_IRH", tpcirh6, m6);
1433 // and all together...
1435 TGeoVolume *tpciclamp = new TGeoVolumeAssembly("TPC_ICLP");
1436 tpciclamp->AddNode(tpcihs, 1);
1437 tpciclamp->AddNode(tpcirh, 1, new TGeoTranslation(0, 1.99, 1.1));
1438 tpciclamp->AddNode(tpcirh, 2, new TGeoTranslation(0, 1.99, -1.1));
1440 // and now left inner "head"
1442 TGeoPcon *inplug = new TGeoPcon("inplug", 0.0, 360.0, 14);
1444 inplug->DefineSection(0, 0.3, 0.0, 2.2);
1445 inplug->DefineSection(1, 0.6, 0.0, 2.2);
1447 inplug->DefineSection(2, 0.6, 0.0, 1.75);
1448 inplug->DefineSection(3, 0.7, 0.0, 1.75);
1450 inplug->DefineSection(4, 0.7, 1.55, 1.75);
1451 inplug->DefineSection(5, 1.6, 1.55, 1.75);
1453 inplug->DefineSection(6, 1.6, 1.55, 2.2);
1454 inplug->DefineSection(7, 1.875, 1.55, 2.2);
1456 inplug->DefineSection(8, 1.875, 1.55, 2.2);
1457 inplug->DefineSection(9, 2.47, 1.75, 2.2);
1459 inplug->DefineSection(10, 2.47, 1.75, 2.08);
1460 inplug->DefineSection(11, 2.57, 1.8, 2.08);
1462 inplug->DefineSection(12, 2.57, 1.92, 2.08);
1463 inplug->DefineSection(13, 2.95, 1.92, 2.08);
1469 new TGeoBBox("pcuti", 1.5, 0.11, 1.075, shift1);
1471 TGeoCompositeShape *inplleft = new TGeoCompositeShape("inplleft", "inplug-pcuti");
1472 TGeoVolume *tpcinlplug = new TGeoVolume("TPC_INPLL", inplleft, m6);
1476 TGeoVolume *tpcihpl = new TGeoVolumeAssembly("TPC_IHPL"); //holder+2 plugs (reflected)
1477 tpcihpl->AddNode(tpcinlplug, 1);
1478 tpcihpl->AddNode(tpcinlplug, 2,ref);
1479 tpcihpl->AddNode(tpciclamp,1,new TGeoTranslation(0.0, -2.765, 0.0));
1481 // outer holders and clamps
1484 // outer membrane holder (between rods)
1490 pointstrap[5]= 2.8-3.1*TMath::Tan(15.*TMath::DegToRad());
1495 pointstrap[10]= 0.0;
1496 pointstrap[11]= 2.8;
1497 pointstrap[12]= 3.1;
1498 pointstrap[13]= 2.8-3.1*TMath::Tan(15.*TMath::DegToRad());
1499 pointstrap[14]= 3.1;
1500 pointstrap[15]= 0.0;
1502 TGeoArb8 *tpcomh1 = new TGeoArb8("tpcomh1", 1.05, pointstrap);
1503 TGeoBBox *tpcomh2 = new TGeoBBox("tpcomh2", 0.8, 1.4, 6);
1505 TGeoVolume *tpcomh1v = new TGeoVolume("TPC_OMH1", tpcomh1, m7);
1506 TGeoVolume *tpcomh2v = new TGeoVolume("TPC_OMH2", tpcomh2, m7);
1508 TGeoVolume *tpcomh3v = new TGeoVolumeAssembly("TPC_OMH3"); // assembly1
1509 tpcomh3v->AddNode(tpcomh1v, 1, new TGeoTranslation(0.8, -1.4, 4.95));
1510 tpcomh3v->AddNode(tpcomh1v, 2, new TGeoTranslation(0.8, -1.4, -4.95));
1511 tpcomh3v->AddNode(tpcomh2v, 1);
1517 new TGeoBBox("tpcomh3", 1.65, 1.15, 3.4);
1518 TGeoBBox *tpcomh4 = new TGeoBBox("tpcomh4", 0.75, 0.7, 3.4, shift1);
1527 n[1] = -1.0*TMath::Tan(30.*TMath::DegToRad());
1530 new TGeoHalfSpace("cutomh1", p, n);
1539 n[1] = -1.0*TMath::Tan(30.*TMath::DegToRad());
1542 new TGeoHalfSpace("cutomh2", p, n);
1550 n[0] = 1.0*TMath::Tan(75.*TMath::DegToRad());
1554 new TGeoHalfSpace("cutomh3", p, n);
1562 n[0] = 1.0*TMath::Tan(75*TMath::DegToRad());
1566 new TGeoHalfSpace("cutomh4", p, n);
1575 n[1] = -1.0*TMath::Tan(20.*TMath::DegToRad());
1578 new TGeoHalfSpace("cutomh5", p, n);
1580 TGeoCompositeShape *tpcomh5 = new TGeoCompositeShape("tpcomh5", "tpcomh3-cutomh1-cutomh2-cutomh3-cutomh4-cutomh5");
1582 TGeoVolume *tpcomh5v = new TGeoVolume("TPC_OMH5",tpcomh5,m6);
1583 TGeoVolume *tpcomh4v = new TGeoVolume("TPC_OMH6",tpcomh4,m6);
1585 TGeoVolumeAssembly *tpcomh7v = new TGeoVolumeAssembly("TPC_OMH7");
1586 tpcomh7v->AddNode(tpcomh5v,1);
1587 tpcomh7v->AddNode(tpcomh4v,1);
1589 // full membrane holder - tpcomh3v + tpcomh7v
1591 TGeoVolumeAssembly *tpcomh = new TGeoVolumeAssembly("TPC_OMH");
1592 tpcomh->AddNode(tpcomh3v,1,new TGeoTranslation(1.5,0.,0.));
1593 tpcomh->AddNode(tpcomh3v,2,new TGeoCombiTrans(-1.5,0.,0.,rot111));
1594 tpcomh->AddNode(tpcomh7v,1,new TGeoTranslation(0.65+1.5, 2.55, 0.0));
1595 tpcomh->AddNode(tpcomh7v,2,new TGeoCombiTrans(-0.65-1.5, 2.55, 0.0,rot111));
1597 // outer rod holder support
1599 new TGeoBBox("tpcohs1", 3.8, 0.675, 2.35);
1605 new TGeoBBox("tpcohs2", 1.5, 0.5, 2.35, shift1);
1606 new TGeoBBox("tpcohs3", 3.8, 0.5, 0.85, shift1);
1612 TGeoBBox *tpcohs4 = new TGeoBBox("tpsohs4", 3.1, 0.5, 0.7, shift1);
1614 TGeoVolume *tpcohs4v = new TGeoVolume("TPC_OHS4", tpcohs4, m6);
1624 new TGeoHalfSpace("cutohs1", p, n);
1626 TGeoCompositeShape *tpcohs5 = new TGeoCompositeShape("tpcohs5", "tpcohs1-tpcohs2-tpcohs3-cutohs1");
1627 TGeoVolume *tpcohs5v = new TGeoVolume("TPC_OHS5", tpcohs5, m6);
1629 TGeoVolumeAssembly *tpcohs = new TGeoVolumeAssembly("TPC_OHS");
1630 tpcohs->AddNode(tpcohs5v, 1);
1631 tpcohs->AddNode(tpcohs4v, 1);
1633 // outer rod holder itself
1638 new TGeoBBox("tpcorh1", 3.1, 1.825, 0.55); //from this box we cut pieces...
1644 new TGeoBBox("tpcorh2", 0.5, 2.75, 1.1, shift1);
1650 new TGeoBBox("tpcorh3", 0.5, 2.75, 1.1, shift1);
1656 new TGeoBBox("tpcorh4", 3.9, 2.75, 0.5, shift1);
1662 new TGeoBBox("tpcorh5", 1.95, 0.5, 1.1, shift1);
1668 new TGeoBBox("tpcorh6", 2.4, 0.5, 0.6, shift1);
1670 new TGeoTube("tpcorh7", 0, 1.95, 0.85);
1671 new TGeoTube("tpcorh8", 0, 2.4, 0.6);
1673 TGeoTranslation *trans33 = new TGeoTranslation("trans33", 0.0, 0.0, 0.55);
1674 trans33->RegisterYourself();
1676 TGeoCompositeShape *tpcorh9 = new TGeoCompositeShape("tpcorh9", "tpcorh1-tpcorh2-tpcorh3-tpcorh4-tpcorh5-tpcorh6-(tpcorh8:trans33)-tpcorh7");
1678 TGeoVolume *tpcorh9v = new TGeoVolume("TPC_ORH",tpcorh9,m6); //outer rod holder
1680 // now 2 holders together
1682 TGeoVolumeAssembly *tpcorh = new TGeoVolumeAssembly("TPC_ORH2");
1684 tpcorh->AddNode(tpcorh9v,1,new TGeoTranslation(0.0, 0.0, 1.25));
1685 tpcorh->AddNode(tpcorh9v,2,new TGeoCombiTrans(0.0, 0.0, -1.25,rot111));
1687 // outer rod plug left
1689 TGeoPcon *outplug = new TGeoPcon("outplug", 0.0, 360.0, 14);
1691 outplug->DefineSection(0, 0.5, 0.0, 2.2);
1692 outplug->DefineSection(1, 0.7, 0.0, 2.2);
1694 outplug->DefineSection(2, 0.7, 1.55, 2.2);
1695 outplug->DefineSection(3, 0.8, 1.55, 2.2);
1697 outplug->DefineSection(4, 0.8, 1.55, 1.75);
1698 outplug->DefineSection(5, 1.2, 1.55, 1.75);
1700 outplug->DefineSection(6, 1.2, 1.55, 2.2);
1701 outplug->DefineSection(7, 1.875, 1.55, 2.2);
1703 outplug->DefineSection(8, 1.875, 1.55, 2.2);
1704 outplug->DefineSection(9, 2.47, 1.75, 2.2);
1706 outplug->DefineSection(10, 2.47, 1.75, 2.08);
1707 outplug->DefineSection(11, 2.57, 1.8, 2.08);
1709 outplug->DefineSection(12, 2.57, 1.92, 2.08);
1710 outplug->DefineSection(13, 2.95, 1.92, 2.08);
1716 new TGeoBBox("cutout", 2.5, 0.11, 1.01, shift1);
1719 TGeoCompositeShape *outplleft = new TGeoCompositeShape("outplleft", "outplug-cutout");
1720 TGeoVolume *outplleftv = new TGeoVolume("TPC_OPLL", outplleft, m6);
1722 // support + holder + plug
1726 TGeoVolumeAssembly *tpcohpl = new TGeoVolumeAssembly("TPC_OHPL");
1728 tpcohpl->AddNode(outplleftv,1); //plug
1729 tpcohpl->AddNode(outplleftv,2,ref); //plug reflected
1730 tpcohpl->AddNode(tpcorh,1); //rod holder
1731 tpcohpl->AddNode(tpcohs,1,new TGeoTranslation(0.0, 3.925, 0)); // support
1735 // main membrane holder
1742 pointstrap[5]= 1.96;
1747 pointstrap[10]= 0.0;
1748 pointstrap[11]= 2.8;
1749 pointstrap[12]= 3.1;
1750 pointstrap[13]= 1.96;
1751 pointstrap[14]= 3.1;
1752 pointstrap[15]= 0.0;
1754 TGeoArb8 *tpcmmh1 = new TGeoArb8("tpcmmh1", 1.75, pointstrap);
1755 TGeoBBox *tpcmmh2 = new TGeoBBox("tpcmmh2", 0.8, 1.4, 12.5);
1757 TGeoVolume *tpcmmh1v = new TGeoVolume("TPC_MMH1", tpcmmh1, m6);
1758 TGeoVolume *tpcmmh2v = new TGeoVolume("TPC_MMH2", tpcmmh2, m6);
1760 TGeoVolumeAssembly *tpcmmhs = new TGeoVolumeAssembly("TPC_MMHS");
1761 tpcmmhs->AddNode(tpcmmh1v,1,new TGeoTranslation(0.8, -1.4, 10.75));
1762 tpcmmhs->AddNode(tpcmmh1v,2,new TGeoTranslation(0.8, -1.4, -10.75));
1763 tpcmmhs->AddNode(tpcmmh2v,1);
1765 // main membrahe holder clamp
1771 new TGeoBBox("tpcmmhc1", 1.65, 1.85, 8.9);
1772 new TGeoBBox("tpcmmhc2", 0.9, 0.7, 8.9, shift1);
1774 // half spaces - cuts
1782 n[2] = 8.0*TMath::Tan(13.*TMath::DegToRad());
1784 new TGeoHalfSpace("cutmmh1", p, n);
1792 n[2] = -8.0*TMath::Tan(13.*TMath::DegToRad());
1794 new TGeoHalfSpace("cutmmh2", p, n);
1802 n[2] = 6.1*TMath::Tan(20.*TMath::DegToRad());
1804 new TGeoHalfSpace("cutmmh3", p, n);
1812 n[2] = -6.1*TMath::Tan(20*TMath::DegToRad());
1814 new TGeoHalfSpace("cutmmh4", p, n);
1820 n[0] = 2.4*TMath::Tan(30*TMath::DegToRad());
1824 new TGeoHalfSpace("cutmmh5", p, n);
1830 n[0] = 2.4*TMath::Tan(30*TMath::DegToRad());
1834 new TGeoHalfSpace("cutmmh6", p, n);
1836 TGeoCompositeShape *tpcmmhc = new TGeoCompositeShape("TPC_MMHC", "tpcmmhc1-tpcmmhc2-cutmmh1-cutmmh2-cutmmh3-cutmmh4-cutmmh5-cutmmh6");
1838 TGeoVolume *tpcmmhcv = new TGeoVolume("TPC_MMHC",tpcmmhc,m6);
1840 TGeoVolume *tpcmmh = new TGeoVolumeAssembly("TPC_MMH");
1842 tpcmmh->AddNode(tpcmmhcv,1,new TGeoTranslation(0.65+1.5, 1.85, 0.0));
1843 tpcmmh->AddNode(tpcmmhcv,2,new TGeoCombiTrans(-0.65-1.5, 1.85, 0.0,rot111));
1844 tpcmmh->AddNode(tpcmmhs,1,new TGeoTranslation(1.5, 0.0, 0.0));
1845 tpcmmh->AddNode(tpcmmhs,2,new TGeoCombiTrans(-1.5, 0.0, 0.0,rot111));
1850 //--------------------------------------------
1852 // guard ring resistor chain
1855 TGeoTube *gres1 = new TGeoTube(0.,0.375,125.);// inside ifc
1857 TGeoVolume *vgres1 = new TGeoVolume("TPC_GRES1",gres1,m10);
1862 xrc=79.3*TMath::Cos(350.*TMath::DegToRad());
1863 yrc=79.3*TMath::Sin(350.*TMath::DegToRad());
1865 v9->AddNode(vgres1,1,new TGeoTranslation(xrc,yrc,126.9));
1866 v9->AddNode(vgres1,2,new TGeoTranslation(xrc,yrc,-126.9));
1868 xrc=79.3*TMath::Cos(190.*TMath::DegToRad());
1869 yrc=79.3*TMath::Sin(190.*TMath::DegToRad());
1871 v9->AddNode(vgres1,3,new TGeoTranslation(xrc,yrc,126.9));
1872 v9->AddNode(vgres1,4,new TGeoTranslation(xrc,yrc,-126.9));
1873 //------------------------------------------------------------------
1874 TGeoRotation refl("refl",90.,0.,90.,90.,180.,0.);
1875 TGeoRotation rotrod("rotrod");
1877 TGeoRotation *rotpos[2];
1879 TGeoRotation *rotrod1[2];
1884 TGeoRotation rot102("rot102");
1885 rot102.RotateY(-90.);
1887 for(Int_t i=0;i<18;i++){
1890 angle=TMath::DegToRad()*20.*(Double_t)i;
1893 x=r * TMath::Cos(angle);
1894 y=r * TMath::Sin(angle);
1896 TGeoRotation *rot12 = new TGeoRotation();
1897 rot12->RotateZ(-90.0+i*20.);
1898 v9->AddNode(tpcihpl,i+1,new TGeoCombiTrans(x, y, 0., rot12));
1900 if(i==11){//resistor rod inner
1901 rotrod.RotateZ(-90.+angle);
1902 rotrod1[0]= new TGeoRotation();
1903 rotpos[0]= new TGeoRotation();
1905 rotrod1[0]->RotateZ(-90.+angle);
1906 *rotpos[0] = refl*rotrod; //rotation+reflection
1907 v9->AddNode(tpcrrod,1,new TGeoCombiTrans(x,y, z, rotrod1[0])); //A
1908 v9->AddNode(tpcrrod,2,new TGeoCombiTrans(x,y,-z, rotpos[0])); //C
1911 v9->AddNode(tpcmrod,i+1,new TGeoTranslation(x,y,z));//shaft
1912 v9->AddNode(tpcmrod,i+19,new TGeoCombiTrans(x,y,-z,ref));//muon
1916 x=r * TMath::Cos(angle);
1917 y=r * TMath::Sin(angle);
1920 // outer rod holder + outer left plug
1922 TGeoRotation *rot33 = new TGeoRotation();
1923 rot33->RotateZ(-90+i*20.);
1925 v9->AddNode(tpcohpl,i+1,new TGeoCombiTrans(x, y, 0., rot33));
1927 Double_t xxx = 256.297*TMath::Cos((i*20.+10.)*TMath::DegToRad());
1928 Double_t yyy = 256.297*TMath::Sin((i*20.+10.)*TMath::DegToRad());
1930 TGeoRotation rot101("rot101");
1931 rot101.RotateZ(90.+i*20.+10.);
1932 TGeoRotation *rot103 = new TGeoRotation("rot103");
1933 *rot103 = rot101*rot102;
1935 TGeoCombiTrans *trh100 = new TGeoCombiTrans(xxx,yyy,0.,rot103);
1938 //main membrane holder
1939 v9->AddNode(tpcmmh,1,trh100);
1942 // "normal" membrane holder
1943 v9->AddNode(tpcomh,i+1,trh100);
1947 if(i==3){//resistor rod outer
1948 rotrod.RotateZ(90.+angle);
1949 rotrod1[1]= new TGeoRotation();
1950 rotpos[1]= new TGeoRotation();
1951 rotrod1[1]->RotateZ(90.+angle);
1952 *rotpos[1] = refl*rotrod;//rotation+reflection
1953 v9->AddNode(tpcrrod,3,new TGeoCombiTrans(x,y, z, rotrod1[1])); //A
1954 v9->AddNode(tpcrrod,4,new TGeoCombiTrans(x,y, -z, rotpos[1])); //C
1957 v9->AddNode(tpcmrod,i+37,new TGeoTranslation(x,y,z));//shaft
1958 v9->AddNode(tpcmrod,i+55,new TGeoCombiTrans(x,y,-z,ref));//muon
1961 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z+0.7)); //hv->A-side only
1965 } //end of rods positioning
1967 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
1968 alice->AddNode(v1,1);
1970 } // end of function
1972 //_____________________________________________________________________________
1973 void AliTPCv2::AddAlignableVolumes() const
1976 // Create entries for alignable volumes associating the symbolic volume
1977 // name with the corresponding volume path. Needs to be syncronized with
1978 // eventual changes in the geometry.
1980 SetInnerChambersAlignable();
1981 SetOuterChambersAlignable();
1984 //_____________________________________________________________________________
1985 void AliTPCv2::SetInnerChambersAlignable() const
1988 AliGeomManager::ELayerID idTPC1 = AliGeomManager::kTPC1;
1989 Int_t modUID, modnum = 0;
1990 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1991 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1992 TString vpappend = "/TPC_IROC_1";
1993 TString snstr1="TPC/EndcapA/Sector";
1994 TString snstr2="TPC/EndcapC/Sector";
1995 TString snappend="/InnerChamber";
1996 TString volpath, symname;
1998 for(Int_t cnt=1; cnt<=18; cnt++){
1999 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
2002 volpath += vpappend;
2005 symname += snappend;
2006 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
2007 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
2008 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
2009 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
2010 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
2011 alignableEntry->SetMatrix(matTtoL);
2014 for(Int_t cnt=1; cnt<=18; cnt++){
2015 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
2018 volpath += vpappend;
2021 symname += snappend;
2022 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
2023 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
2024 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
2025 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
2026 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
2027 alignableEntry->SetMatrix(matTtoL);
2031 //_____________________________________________________________________________
2032 void AliTPCv2::SetOuterChambersAlignable() const
2035 AliGeomManager::ELayerID idTPC2 = AliGeomManager::kTPC2;
2036 Int_t modUID, modnum = 0;
2037 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
2038 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
2039 TString vpappend = "/TPC_OROC_1";
2040 TString snstr1="TPC/EndcapA/Sector";
2041 TString snstr2="TPC/EndcapC/Sector";
2042 TString snappend="/OuterChamber";
2043 TString volpath, symname;
2045 for(Int_t cnt=1; cnt<=18; cnt++){
2046 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
2049 volpath += vpappend;
2052 symname += snappend;
2053 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
2054 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
2055 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
2056 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
2057 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
2058 alignableEntry->SetMatrix(matTtoL);
2061 for(Int_t cnt=1; cnt<=18; cnt++){
2062 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
2065 volpath += vpappend;
2068 symname += snappend;
2069 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
2070 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
2071 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
2072 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
2073 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
2074 alignableEntry->SetMatrix(matTtoL);
2079 //_____________________________________________________________________________
2080 void AliTPCv2::CreateMaterials()
2083 // Define materials for version 2 of the Time Projection Chamber
2086 AliTPC::CreateMaterials();
2089 //_____________________________________________________________________________
2090 void AliTPCv2::Init()
2093 // Initialises version 2 of the TPC after that it has been built
2096 Int_t *idtmed = fIdtmed->GetArray();
2101 fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected...
2103 fIDrift=gMC->VolId("TPC_Drift");
2104 fSecOld=-100; // fake number
2106 gMC->SetMaxNStep(-30000); // max. number of steps increased
2108 if (fPrimaryIonisation) {
2110 gMC->Gstpar(idtmed[2],"PRIMIO_E", 20.77); // 1st ionisation potential
2112 gMC->Gstpar(idtmed[2],"PRIMIO_N", 14.35);
2113 gMC->Gstpar(idtmed[2],"LOSS", 14); // specific energy loss
2114 gMC->Gstpar(idtmed[2],"STRA",4);
2116 // specific energy loss for geant3 is now defined in galice.cuts
2119 AliDebug(1,"*** TPC version 2 initialized ***");
2120 AliDebug(1,Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
2126 //_____________________________________________________________________________
2127 void AliTPCv2::StepManager()
2130 // Called for every step in the Time Projection Chamber
2134 // parameters used for the energy loss calculations
2136 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
2137 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
2138 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
2139 const Int_t kMaxDistRef =15; // maximal difference between 2 stored references
2141 const Float_t kbig = 1.e10;
2148 vol[1]=0; // preset row number to 0
2150 if (!fPrimaryIonisation) gMC->SetMaxStep(kbig);
2152 if(!gMC->IsTrackAlive()) return; // particle has disappeared
2154 Float_t charge = gMC->TrackCharge();
2156 if(TMath::Abs(charge)<=0.) return; // take only charged particles
2158 // check the sensitive volume
2160 id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
2161 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
2163 if ( fPrimaryIonisation && id == fIDrift ) {
2164 Double_t rnd = gMC->GetRandom()->Rndm();
2165 gMC->SetMaxStep(0.2+(2.*rnd-1.)*0.05); // 2 mm +- rndm*0.5mm step
2168 //if ( fPrimaryIonisation && id == fIDrift && gMC->IsTrackEntering()) {
2169 // gMC->SetMaxStep(0.2); // 2 mm
2172 gMC->TrackPosition(p);
2173 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
2177 Double_t angle = TMath::ACos(p[0]/r);
2178 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
2180 // angular segment, it is not a real sector number...
2182 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
2183 fTPCParam->GetInnerAngle());
2184 // rotate to segment "0"
2186 fTPCParam->AdjustCosSin(sector,cos,sin);
2187 Float_t x1=p[0]*cos + p[1]*sin;
2188 // check if within sector's limits
2189 if((x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp())
2190 ||(x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp())){
2191 // calculate real sector number...
2192 if (x1>fTPCParam->GetOuterRadiusLow()){
2193 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
2194 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
2195 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
2198 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
2200 // here I have a sector number
2205 static Double_t lastReferenceR=0;
2206 if (TMath::Abs(lastReferenceR-r)>kMaxDistRef){
2207 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
2211 // check if change of sector
2212 if(sector != fSecOld){
2214 // add track reference
2215 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
2217 // track is in the sensitive strip
2219 // track is entering the strip
2220 if (gMC->IsTrackEntering()){
2221 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
2222 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
2223 // row numbers are autonomous for lower and upper sectors
2224 if(vol[0] > fTPCParam->GetNInnerSector()) {
2225 vol[1] -= fTPCParam->GetNRowLow();
2228 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
2230 // lower sector, row 0, because Jouri wants to have this
2232 gMC->TrackMomentum(p);
2236 hits[3]=0.; // this hit has no energy loss
2237 // Get also the track time for pileup simulation
2238 hits[4]=gMC->TrackTime();
2240 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
2244 gMC->TrackPosition(p);
2248 hits[3]=0.; // this hit has no energy loss
2249 // Get also the track time for pileup simulation
2250 hits[4]=gMC->TrackTime();
2252 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
2257 //-----------------------------------------------------------------
2258 // charged particle is in the sensitive drift volume
2259 //-----------------------------------------------------------------
2260 if(gMC->TrackStep() > 0) {
2262 if (!fPrimaryIonisation) {
2263 nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
2266 static Double_t deForNextStep = 0.;
2267 // Geant4 (the meaning of Edep as in Geant3) - wrong
2268 //nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
2270 // Geant4 (the meaning of Edep as in Geant3) - NEW
2271 Double_t eAvailable = gMC->Edep() + deForNextStep;
2272 nel = (Int_t)(eAvailable/kwIon);
2273 deForNextStep = eAvailable - nel*kwIon;
2275 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
2277 gMC->TrackPosition(p);
2281 hits[3]=(Float_t)nel;
2285 // if (fHitType&&2){
2287 gMC->TrackMomentum(p);
2288 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
2289 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
2290 fTrackHits->SetHitPrecision(precision);
2293 // Get also the track time for pileup simulation
2294 hits[4]=gMC->TrackTime();
2296 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
2297 if (fDebugStreamer){
2298 // You can dump here what you need
2299 // function CreateDebugStremer() to be called in the Config.C macro
2300 // if you want to enable it
2301 // By default debug streaemer is OFF
2302 Float_t edep = gMC->Edep();
2303 Float_t tstep = gMC->TrackStep();
2304 Int_t pid=gMC->TrackPid();
2305 (*fDebugStreamer)<<"hit"<<
2306 "x="<<hits[0]<< // hit position
2309 "nel="<<hits[3]<< // number of electorns
2310 "tof="<<hits[4]<< // hit TOF
2311 "edep="<<edep<< // energy deposit
2312 "pid="<<pid<< // pid
2319 } //within sector's limits
2320 // Stemax calculation for the next step
2324 // below is valid only for Geant3 (fPromaryIonisation not set)
2325 if(!fPrimaryIonisation){
2326 gMC->TrackMomentum(mom);
2327 Float_t ptot=mom.Rho();
2328 Float_t betaGamma = ptot/gMC->TrackMass();
2330 Int_t pid=gMC->TrackPid();
2331 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
2333 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
2338 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
2339 pp=kprim*AliMathBase::BetheBlochAleph(betaGamma);
2343 Double_t rnd = gMC->GetRandom()->Rndm();
2345 gMC->SetMaxStep(-TMath::Log(rnd)/pp);