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"
64 //_____________________________________________________________________________
65 AliTPCv2::AliTPCv2(const char *name, const char *title) :
72 // Standard constructor for Time Projection Chamber version 2
76 SetBufferSize(128000);
77 if(!fTPCParam) {AliFatal("TPC parameters not set");
80 gaspar_.fpot=fTPCParam->GetFpot();
81 gaspar_.eend=fTPCParam->GetEend();
82 gaspar_.eexpo=fTPCParam->GetExp();
87 //_____________________________________________________________________________
88 void AliTPCv2::CreateGeometry()
91 // Create the geometry of Time Projection Chamber version 2
95 <img src="picts/AliTPC.gif">
100 <img src="picts/AliTPCv2Tree.gif">
104 //----------------------------------------------------------
105 // This geometry is written using TGeo class
106 // Firstly the shapes are defined, and only then the volumes
107 // What is recognized by the MC are volumes
108 //----------------------------------------------------------
110 // tpc - this will be the mother volume
114 // here I define a volume TPC
115 // retrive the medium name with "TPC_" as a leading string
117 TGeoPcon *tpc = new TGeoPcon(0.,360.,30); //30 sections
119 tpc->DefineSection(0,-289.6,77.,278.);
120 tpc->DefineSection(1,-262.1,77.,278.);
122 tpc->DefineSection(2,-262.1,83.1,278.);
123 tpc->DefineSection(3,-260.,83.1,278.);
125 tpc->DefineSection(4,-260.,70.,278.);
126 tpc->DefineSection(5,-259.6,70.,278.);
128 tpc->DefineSection(6,-259.6,68.1,278.);
129 tpc->DefineSection(7,-253.6,68.1,278.);
131 tpc->DefineSection(8,-253.6,67.88,278.);//hs
132 tpc->DefineSection(9,-74.0,60.68,278.);// hs
134 tpc->DefineSection(10,-74.0,60.1,278.);
135 tpc->DefineSection(11,-73.3,60.1,278.);
137 tpc->DefineSection(12,-73.3,56.9,278.);
138 tpc->DefineSection(13,-68.5,56.9,278.);
140 tpc->DefineSection(14,-68.5,60.,278.);
141 tpc->DefineSection(15,-64.7,60.,278.);
143 tpc->DefineSection(16,-64.7,56.9,278.);
144 tpc->DefineSection(17,73.3,56.9,278.);
146 tpc->DefineSection(18,73.3,60.1,278.);
147 tpc->DefineSection(19,74.0,60.1,278.);
149 tpc->DefineSection(20,74.0,60.68,278.);// hs
150 tpc->DefineSection(21,253.6,65.38,278.);// hs
152 tpc->DefineSection(22,253.6,65.6,278.);
153 tpc->DefineSection(23,259.6,65.6,278.);
155 tpc->DefineSection(24,259.6,70.0,278.);
156 tpc->DefineSection(25,260.,70.0,278.);
158 tpc->DefineSection(26,260.,83.1,278.);
159 tpc->DefineSection(27,262.1,83.1,278.);
161 tpc->DefineSection(28,262.1,77.,278);
162 tpc->DefineSection(29,289.6,77.,278.);
164 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
165 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
167 // drift volume - sensitive volume, extended beyond the
168 // endcaps, because of the alignment
170 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
171 dvol->DefineSection(0,-260.,74.5,264.4);
172 dvol->DefineSection(1,-253.6,74.5,264.4);
174 dvol->DefineSection(2,-253.6,76.6774,258.);
175 dvol->DefineSection(3,253.6,76.6774,258.);
177 dvol->DefineSection(4,253.6,74.5,264.4);
178 dvol->DefineSection(5,260.,74.5,264.4);
180 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_DriftGas2");
181 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
187 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
189 tpco->DefineSection(0,-256.6,264.8,278.);
190 tpco->DefineSection(1,-253.6,264.8,278.);
192 tpco->DefineSection(2,-253.6,258.,278.);
193 tpco->DefineSection(3,250.6,258.,278.);
195 tpco->DefineSection(4,250.6,258.,275.5);
196 tpco->DefineSection(5,253.6,258.,275.5);
198 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
199 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
201 TGeoRotation *segrot;//segment rotations
203 // outer containment vessel
205 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
207 tocv->DefineSection(0,-256.6,264.8,278.);
208 tocv->DefineSection(1,-253.6,264.8,278.);
210 tocv->DefineSection(2,-253.6,274.8124,278.);
211 tocv->DefineSection(3,247.6,274.8124,278.);
213 tocv->DefineSection(4,247.6,270.4,278.);
214 tocv->DefineSection(5,250.6,270.4,278.);
216 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
217 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
219 TGeoTubeSeg *to1 = new TGeoTubeSeg(274.8174,277.995,252.1,0.,59.9); //epoxy
220 TGeoTubeSeg *to2 = new TGeoTubeSeg(274.8274,277.985,252.1,0.,59.9); //tedlar
221 TGeoTubeSeg *to3 = new TGeoTubeSeg(274.8312,277.9812,252.1,0.,59.9);//prepreg2
222 TGeoTubeSeg *to4 = new TGeoTubeSeg(274.9062,277.9062,252.1,0.,59.9);//nomex
223 TGeoTubeSeg *tog5 = new TGeoTubeSeg(274.8174,277.995,252.1,59.9,60.);//epoxy
225 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
226 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
227 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
228 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
230 TGeoMedium *smep = gGeoManager->GetMedium("TPC_Epoxy1");
232 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
233 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
234 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
235 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
236 TGeoVolume *togv5 = new TGeoVolume("TPC_OCVG5",tog5,sm1);
238 TGeoMedium *mhs = gGeoManager->GetMedium("TPC_Steel");
239 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
240 //-------------------------------------------------------
241 // Tpc Outer Field Cage
242 // daughters - composite (sandwich)
243 //-------------------------------------------------------
245 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
247 tofc->DefineSection(0,-253.6,258.,269.6);
248 tofc->DefineSection(1,-250.6,258.,269.6);
250 tofc->DefineSection(2,-250.6,258.,260.0676);
251 tofc->DefineSection(3,250.6,258.,260.0676);
253 tofc->DefineSection(4,250.6,258.,275.5);
254 tofc->DefineSection(5,253.6,258.,275.5);
256 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
258 TGeoTubeSeg *tf1 = new TGeoTubeSeg(258.0,260.0676,252.1,0.,59.9); //tedlar
259 TGeoTubeSeg *tf2 = new TGeoTubeSeg(258.0038,260.0638,252.1,0.,59.9); //prepreg3
260 TGeoTubeSeg *tf3 = new TGeoTubeSeg(258.0338,260.0338,252.1,0.,59.9);//nomex
261 TGeoTubeSeg *tfg4 = new TGeoTubeSeg(258.0,260.0676,252.1,59.9,60.); //epoxy glue
263 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
265 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
266 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
267 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
268 TGeoVolume *tfg4v = new TGeoVolume("TPC_OFCG4",tfg4,smep);
270 // outer part - positioning
272 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);//ocv
274 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);//ofc
276 TGeoVolumeAssembly *t200 = new TGeoVolumeAssembly("TPC_OCVSEG");
277 TGeoVolumeAssembly *t300 = new TGeoVolumeAssembly("TPC_OFCSEG");
279 // assembly OCV and OFC
282 t200->AddNode(tov1,1); t200->AddNode(togv5,1);
283 t300->AddNode(tf1v,1); t300->AddNode(tfg4v,1);
284 // 2nd - rotation 60 deg
285 segrot = new TGeoRotation();
286 segrot->RotateZ(60.);
287 t200->AddNode(tov1,2,segrot); t200->AddNode(togv5,2,segrot);
288 t300->AddNode(tf1v,2,segrot); t300->AddNode(tfg4v,2,segrot);
289 // 3rd rotation 120 deg
290 segrot = new TGeoRotation();
291 segrot->RotateZ(120.);
292 t200->AddNode(tov1,3,segrot); t200->AddNode(togv5,3,segrot);
293 t300->AddNode(tf1v,3,segrot); t300->AddNode(tfg4v,3,segrot);
294 //4th rotation 180 deg
295 segrot = new TGeoRotation();
296 segrot->RotateZ(180.);
297 t200->AddNode(tov1,4,segrot); t200->AddNode(togv5,4,segrot);
298 t300->AddNode(tf1v,4,segrot); t300->AddNode(tfg4v,4,segrot);
299 //5th rotation 240 deg
300 segrot = new TGeoRotation();
301 segrot->RotateZ(240.);
302 t200->AddNode(tov1,5,segrot); t200->AddNode(togv5,5,segrot);
303 t300->AddNode(tf1v,5,segrot); t300->AddNode(tfg4v,5,segrot);
304 //6th rotation 300 deg
305 segrot = new TGeoRotation();
306 segrot->RotateZ(300.);
307 t200->AddNode(tov1,6,segrot); t200->AddNode(togv5,6,segrot);
308 t300->AddNode(tf1v,6,segrot); t300->AddNode(tfg4v,6,segrot);
310 v3->AddNode(t200,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(t300,1);
312 v2->AddNode(v3,1); v2->AddNode(v4,1);
315 //--------------------------------------------------------------------
316 // Tpc Inner INsulator (CO2)
317 // the cones, the central drum and the inner f.c. sandwich with a piece
318 // of the flane will be placed in the TPC
319 //--------------------------------------------------------------------
320 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
322 tpci->DefineSection(0,-253.6,68.4,76.6774);
323 tpci->DefineSection(1,-74.0,61.2,76.6774);
325 tpci->DefineSection(2,74.0,61.2,76.6774);
327 tpci->DefineSection(3,253.6,65.9,76.6774);
329 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
331 // now the inner field cage - only part of flanges (2 copies)
333 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
334 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
336 //---------------------------------------------------------
337 // Tpc Inner Containment vessel - Muon side
338 //---------------------------------------------------------
339 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
341 tcms->DefineSection(0,-259.1,68.1,74.2);
342 tcms->DefineSection(1,-253.6,68.1,74.2);
344 tcms->DefineSection(2,-253.6,68.1,68.4);
345 tcms->DefineSection(3,-74.0,60.9,61.2);
347 tcms->DefineSection(4,-74.0,60.1,61.2);
348 tcms->DefineSection(5,-73.3,60.1,61.2);
350 tcms->DefineSection(6,-73.3,56.9,61.2);
351 tcms->DefineSection(7,-73.0,56.9,61.2);
353 tcms->DefineSection(8,-73.0,56.9,58.8);
354 tcms->DefineSection(9,-71.3,56.9,58.8);
356 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
357 //------------------------------------------------
358 // Heat screen muon side
359 //------------------------------------------------
361 TGeoCone *thsm = new TGeoCone(89.8,67.88,68.1,60.68,60.9);
362 TGeoCone *thsmw = new TGeoCone(89.8,67.94,68.04,60.74,60.84);
363 TGeoVolume *hvsm = new TGeoVolume("TPC_HSM",thsm,mhs); //steel
364 TGeoVolume *hvsmw = new TGeoVolume("TPC_HSMW",thsmw,m12); //water
365 // assembly heat screen muon
366 hvsm->AddNode(hvsmw,1);
367 //-----------------------------------------------
368 // inner containment vessel - shaft side
369 //-----------------------------------------------
370 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
372 tcss->DefineSection(0,71.3,56.9,58.8);
373 tcss->DefineSection(1,73.0,56.9,58.8);
375 tcss->DefineSection(2,73.0,56.9,61.2);
376 tcss->DefineSection(3,73.3,56.9,61.2);
378 tcss->DefineSection(4,73.3,60.1,61.2);
379 tcss->DefineSection(5,74.0,60.1,61.2);
381 tcss->DefineSection(6,74.0,60.9,61.2);
382 tcss->DefineSection(7,253.6,65.6,65.9);
384 tcss->DefineSection(8,253.6,65.6,74.2);
385 tcss->DefineSection(9,258.1,65.6,74.2);
387 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
388 //-------------------------------------------------
389 // Heat screen shaft side
390 //--------------------------------------------------
391 TGeoCone *thss = new TGeoCone(89.8,60.68,60.9,65.38,65.6);
392 TGeoCone *thssw = new TGeoCone(89.8,60.74,60.84,65.44,65.54);
393 TGeoVolume *hvss = new TGeoVolume("TPC_HSS",thss,mhs); //steel
394 TGeoVolume *hvssw = new TGeoVolume("TPC_HSSW",thssw,m12); //water
395 //assembly heat screen shaft
396 hvss->AddNode(hvssw,1);
397 //-----------------------------------------------
399 // define 4 parts and make an assembly
400 //-----------------------------------------------
401 // part1 - Al - 2 copies
402 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
403 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
404 // sandwich - outermost parts - 2 copies
408 TGeoTubeSeg *t2 = new TGeoTubeSeg(76.6774,78.845,74.175,350.,109.4); // tedlar 38 microns
409 TGeoTubeSeg *t3 = new TGeoTubeSeg(76.6812,78.8412,74.175,350.,109.4); // prepreg2 500 microns
410 TGeoTubeSeg *t4 = new TGeoTubeSeg(76.7312,78.7912,74.175,350.,109.4); // prepreg3 300 microns
411 TGeoTubeSeg *t5 = new TGeoTubeSeg(76.7612,78.7612,74.175,350.,109.4); // nomex 2 cm
412 TGeoTubeSeg *tepox1 = new TGeoTubeSeg(76.6774,78.845,74.175,109.4,110.);//epoxy
413 TGeoTubeSeg *tpr1 = new TGeoTubeSeg(78.845,78.885,74.175,109.,111.);
415 // volumes for the outer part
416 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
417 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
418 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
419 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
420 TGeoVolume *tvep1 = new TGeoVolume("TPC_IFEPOX1",tepox1,smep);
421 TGeoVolume *tvpr1 = new TGeoVolume("TPC_PRSTR1",tpr1,sm2);
423 // middle parts - 2 copies
427 TGeoTubeSeg *t6 = new TGeoTubeSeg(76.6774,78.795,5.,350.,109.4); // tedlar 38 microns
428 TGeoTubeSeg *t7 = new TGeoTubeSeg(76.6812,78.7912,5.,350.,109.4); // prepreg2 250 microns
429 TGeoTubeSeg *t8 = new TGeoTubeSeg(76.7062,78.7662,5.,350.,109.4); // prepreg3 300 microns
430 TGeoTubeSeg *t9 = new TGeoTubeSeg(76.7362,78.7362,5.,350.,109.4); // nomex 2 cm
431 TGeoTubeSeg *tepox2 = new TGeoTubeSeg(76.6774,78.795,5.,109.4,110.);//epoxy
432 TGeoTubeSeg *tpr2 = new TGeoTubeSeg(78.795,78.835,5.,109.,111.);
433 // volumes for the middle part
434 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
435 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
436 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
437 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
438 TGeoVolume *tvep2 = new TGeoVolume("TPC_IFEPOX2",tepox2,smep);
439 TGeoVolume *tvpr2 = new TGeoVolume("TPC_PRSTR2",tpr2,sm2);
440 // central part - 1 copy
442 // segment central part
444 TGeoTubeSeg *t10 = new TGeoTubeSeg(76.6774,78.785,93.75,350.,109.4); // tedlar 38 microns
445 TGeoTubeSeg *t11 = new TGeoTubeSeg(76.6812,78.7812,93.75,350.,109.4); // prepreg3 500 microns
446 TGeoTubeSeg *t12 = new TGeoTubeSeg(76.7312,78.7312,93.75,350.,109.4); // nomex 2 cm
447 TGeoTubeSeg *tepox3 = new TGeoTubeSeg(76.6774,78.785,93.75,109.4,110.);//epoxy
448 TGeoTubeSeg *tpr3 = new TGeoTubeSeg(78.785,78.825,93.75,109.,111.);
449 // volumes for the central part
450 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
451 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
452 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
453 TGeoVolume *tvep3 = new TGeoVolume("TPC_IFEPOX3",tepox3,smep);
454 TGeoVolume *tvpr3 = new TGeoVolume("TPC_PRSTR3",tpr3,sm2);
456 // creating a sandwich for the outer par,t tv2 is the mother
458 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
460 // creating a sandwich for the middle part, tv6 is the mother
462 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
464 // creating a sandwich for the central part, tv10 is the mother
466 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
468 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC"); // ifc itself - 3 segments
471 // first segment - no rotation
474 tv100->AddNode(tv10,1); //sandwich
475 tv100->AddNode(tvep3,1);//epoxy
476 tv100->AddNode(tvpr3,1);//prepreg strip
478 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75)); //sandwich1
479 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75)); // sandwich2
480 tv100->AddNode(tvep2,1,new TGeoTranslation(0.,0.,-98.75)); //epoxy
481 tv100->AddNode(tvep2,2,new TGeoTranslation(0.,0.,98.75)); //epoxy
482 tv100->AddNode(tvpr2,1,new TGeoTranslation(0.,0.,-98.75));//prepreg strip
483 tv100->AddNode(tvpr2,2,new TGeoTranslation(0.,0.,98.75));
485 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925)); //sandwich
486 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
487 tv100->AddNode(tvep1,1,new TGeoTranslation(0.,0.,-177.925)); //epoxy
488 tv100->AddNode(tvep1,2,new TGeoTranslation(0.,0.,177.925));
489 tv100->AddNode(tvpr1,1,new TGeoTranslation(0.,0.,-177.925));//prepreg strip
490 tv100->AddNode(tvpr1,2,new TGeoTranslation(0.,0.,-177.925));
492 // second segment - rotation 120 deg.
494 segrot = new TGeoRotation();
495 segrot->RotateZ(120.);
498 tv100->AddNode(tv10,2,segrot); //sandwich
499 tv100->AddNode(tvep3,2,segrot);//epoxy
500 tv100->AddNode(tvpr3,2,segrot);//prepreg strip
502 tv100->AddNode(tv6,3,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //sandwich1
503 tv100->AddNode(tv6,4,new TGeoCombiTrans(0.,0.,98.75,segrot)); // sandwich2
504 tv100->AddNode(tvep2,3,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //epoxy
505 tv100->AddNode(tvep2,4,new TGeoCombiTrans(0.,0.,98.75,segrot)); //epoxy
506 tv100->AddNode(tvpr2,3,new TGeoCombiTrans(0.,0.,-98.75,segrot));//prepreg strip
507 tv100->AddNode(tvpr2,4,new TGeoCombiTrans(0.,0.,98.75,segrot));
509 tv100->AddNode(tv2,3,new TGeoCombiTrans(0.,0.,-177.925,segrot));//sandwich
510 tv100->AddNode(tv2,4,new TGeoCombiTrans(0.,0.,177.925,segrot));
511 tv100->AddNode(tvep1,3,new TGeoCombiTrans(0.,0.,-177.925,segrot));//epoxy
512 tv100->AddNode(tvep1,4,new TGeoCombiTrans(0.,0.,177.925,segrot));
513 tv100->AddNode(tvpr1,3,new TGeoCombiTrans(0.,0.,-177.925,segrot));//prepreg strip
514 tv100->AddNode(tvpr1,4,new TGeoCombiTrans(0.,0.,177.925,segrot));
516 // third segment - rotation 240 deg.
518 segrot = new TGeoRotation();
519 segrot->RotateZ(240.);
522 tv100->AddNode(tv10,3,segrot); //sandwich
523 tv100->AddNode(tvep3,3,segrot);//epoxy
524 tv100->AddNode(tvpr3,3,segrot);//prepreg strip
526 tv100->AddNode(tv6,5,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //sandwich1
527 tv100->AddNode(tv6,6,new TGeoCombiTrans(0.,0.,98.75,segrot)); // sandwich2
528 tv100->AddNode(tvep2,5,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //epoxy
529 tv100->AddNode(tvep2,6,new TGeoCombiTrans(0.,0.,98.75,segrot)); //epoxy
530 tv100->AddNode(tvpr2,5,new TGeoCombiTrans(0.,0.,-98.75,segrot));//prepreg strip
531 tv100->AddNode(tvpr2,6,new TGeoCombiTrans(0.,0.,98.75,segrot));
533 tv100->AddNode(tv2,5,new TGeoCombiTrans(0.,0.,-177.925,segrot));//sandwich
534 tv100->AddNode(tv2,6,new TGeoCombiTrans(0.,0.,177.925,segrot));
535 tv100->AddNode(tvep1,5,new TGeoCombiTrans(0.,0.,-177.925,segrot));//epoxy
536 tv100->AddNode(tvep1,6,new TGeoCombiTrans(0.,0.,177.925,segrot));
537 tv100->AddNode(tvpr1,5,new TGeoCombiTrans(0.,0.,-177.925,segrot));//prepreg strip
538 tv100->AddNode(tvpr1,6,new TGeoCombiTrans(0.,0.,177.925,segrot));
540 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
541 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
543 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
544 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
545 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
546 v1->AddNode(hvsm,1,new TGeoTranslation(0.,0.,-163.8));
547 v1->AddNode(hvss,1,new TGeoTranslation(0.,0.,163.8));
548 v9->AddNode(tv100,1);
554 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
555 cfl->DefineSection(0,-71.1,59.7,61.2);
556 cfl->DefineSection(1,-68.6,59.7,61.2);
558 cfl->DefineSection(2,-68.6,60.6124,61.2);
559 cfl->DefineSection(3,68.6,60.6124,61.2);
561 cfl->DefineSection(4,68.6,59.7,61.2);
562 cfl->DefineSection(5,71.1,59.7,61.2);
564 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
566 TGeoTubeSeg *cd1 = new TGeoTubeSeg(60.6224,61.19,71.1,0.2,119.2);
567 TGeoTubeSeg *cd2 = new TGeoTubeSeg(60.6262,61.1862,71.1,0.2,119.2);
568 TGeoTubeSeg *cd3 = new TGeoTubeSeg(60.6462,61.1662,71.1,0.2,119.2);
569 TGeoTubeSeg *cd4 = new TGeoTubeSeg(60.6562,61.1562,71.1,0.2,119.2);
570 TGeoTubeSeg *tepox4 = new TGeoTubeSeg(60.6224,61.19,71.1,359.8,0.8);
572 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
573 TGeoMedium *sm8 = gGeoManager->GetMedium("TPC_Epoxyfm");
574 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
575 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
576 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm8); //epoxy film
577 TGeoVolume *cd4v = new TGeoVolume("TPC_CDR4",cd4,sm4); //nomex
578 TGeoVolume *tvep4 = new TGeoVolume("TPC_IFEPOX4",tepox4,smep);
581 // seals for central drum 2 copies
583 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
584 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
585 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
586 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
587 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
590 TGeoPcon *se = new TGeoPcon(0.,360.,6);
591 se->DefineSection(0,-72.8,59.7,61.2);
592 se->DefineSection(1,-72.3,59.7,61.2);
594 se->DefineSection(2,-72.3,58.85,61.2);
595 se->DefineSection(3,-71.6,58.85,61.2);
597 se->DefineSection(4,-71.6,59.7,61.2);
598 se->DefineSection(5,-71.3,59.7,61.2);
600 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
602 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
603 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
605 // define reflection matrix
607 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
609 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cd3v->AddNode(cd4v,1); //sandwich
611 cflv->AddNode(cd1v,1); cflv->AddNode(tvep4,1);
613 segrot = new TGeoRotation();
614 segrot->RotateZ(120.);
615 cflv->AddNode(cd1v,2,segrot); cflv->AddNode(tvep4,2,segrot);
617 segrot = new TGeoRotation();
618 segrot->RotateZ(240.);
619 cflv->AddNode(cd1v,3,segrot); cflv->AddNode(tvep4,3,segrot);
621 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
622 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
623 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
625 // central membrane - 2 rings and a mylar membrane - assembly
627 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
628 TGeoTube *oh = new TGeoTube(250.,256.,0.5);
629 TGeoTube *mem = new TGeoTube(84.05,250.,0.00115);
632 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
634 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
635 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
637 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
639 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
646 // end caps - they are make as an assembly of single segments
647 // containing both readout chambers
649 Double_t openingAngle = 10.*TMath::DegToRad();
650 Double_t thick=1.5; // rib
651 Double_t shift = thick/TMath::Sin(openingAngle);
653 Double_t lowEdge = 86.3; // hole in the wheel
654 Double_t upEdge = 240.4; // hole in the wheel
656 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
658 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
660 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
661 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
663 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
664 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
666 Double_t ys = shift*TMath::Sin(openingAngle);
667 Double_t xs = shift*TMath::Cos(openingAngle);
668 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
669 tr->RegisterYourself();
670 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
671 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
672 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
673 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
674 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
675 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
676 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
678 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
684 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
685 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
687 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
688 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
689 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
691 Double_t tga = (19.8328-12.3742)/39.3;
693 xmin = 9.55*tga+12.3742;
694 xmax = 9.95*tga+12.3742;
695 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
696 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
697 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
698 xmin=19.4*tga+12.3742;
699 xmax=19.9*tga+12.3742;
700 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
701 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
702 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
703 xmin=29.35*tga+12.3742;
704 xmax=29.75*tga+12.3742;
705 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
706 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
707 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
709 // holes for connectors
711 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
712 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
713 TString fileName(gSystem->Getenv("ALICE_ROOT"));
714 fileName += "/TPC/conn_iroc.dat";
716 in.open(fileName.Data(), ios_base::in); // asci file
717 TGeoRotation *rrr[86];
718 for(Int_t i =0;i<86;i++){
723 rrr[i]= new TGeoRotation();
724 rrr[i]->RotateY(ang);
725 ibdv->AddNode(connv,i+1,new TGeoCombiTrans(x,y,z,rrr[i]));
729 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
731 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
732 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
733 tr1->RegisterYourself();
734 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
735 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
737 // pad plane and wire fixations
739 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
740 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
741 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
742 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
743 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
744 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
746 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
748 iroc->AddNode(ibdv,1);
749 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
750 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
751 tga =(23.3521-14.5974)/49.65;
752 Double_t xx = 24.825*tga+14.5974-0.6;
753 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
754 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
758 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
759 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
760 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
761 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
762 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
764 tga=(38.5084-20.2938)/99.3;
765 xmin=tga*10.2+20.2938;
766 xmax=tga*10.6+20.2938;
767 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
768 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
770 xmin=22.55*tga+20.2938;
771 xmax=24.15*tga+20.2938;
772 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
773 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
775 xmin=36.1*tga+20.2938;
776 xmax=36.5*tga+20.2938;
777 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
778 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
780 xmin=49.0*tga+20.2938;
781 xmax=50.6*tga+20.2938;
782 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
783 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
785 xmin=63.6*tga+20.2938;
786 xmax=64.0*tga+20.2938;
787 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
788 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
790 xmin=75.5*tga+20.2938;
791 xmax=77.15*tga+20.2938;
792 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
793 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
795 xmin=88.7*tga+20.2938;
796 xmax=89.1*tga+20.2938;
797 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
798 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
800 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
801 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
802 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
803 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
804 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
805 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
806 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
808 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
809 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
810 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
811 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
812 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
814 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
815 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
816 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
817 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
818 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
820 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
821 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
822 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
823 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
824 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
825 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
826 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
827 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
829 // holes for connectors
831 fileName = gSystem->Getenv("ALICE_ROOT");
832 fileName += "/TPC/conn_oroc.dat";
833 in.open(fileName.Data(), ios_base::in); // asci file
834 TGeoRotation *rr[78];
835 for(Int_t i =0;i<78;i++){
838 Double_t x1,z1,x2,z2;
840 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
841 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
843 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
845 rr[i]= new TGeoRotation();
850 obdv->AddNode(connv,i+1,new TGeoCombiTrans(x1,y,z1,rr[i]));
851 obdv->AddNode(connv,i+79,new TGeoCombiTrans(x2,y,z2,rr[i]));
855 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
856 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
857 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
858 tr5->RegisterYourself();
859 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
860 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
862 // pad plane and wire fixations
864 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
865 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
867 tga=(43.5239-23.3874)/114.2;
868 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
869 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
870 xx = 57.1*tga+23.3874-0.7;
871 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
872 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
874 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
876 oroc->AddNode(obdv,1);
877 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
878 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
879 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
880 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
882 // now iroc and oroc are placed into a sector...
884 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
885 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
886 TGeoRotation rot1("rot1",90.,90.,0.);
887 TGeoRotation rot2("rot2");
889 TGeoRotation *rot = new TGeoRotation("rot");
893 x0=110.2*TMath::Cos(openingAngle);
894 y0=110.2*TMath::Sin(openingAngle);
895 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
896 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
897 x0=188.45*TMath::Cos(openingAngle);
898 y0=188.45*TMath::Sin(openingAngle);
899 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
900 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
905 secta->AddNode(ch,1);
906 secta->AddNode(iroc,1,combi1a);
907 secta->AddNode(oroc,1,combi2a);
911 sectc->AddNode(ch,1);
912 sectc->AddNode(iroc,1,combi1c);
913 sectc->AddNode(oroc,1,combi2c);
915 // now I try to make wheels...
917 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
918 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
920 TGeoRotation *rwh[18];
921 for(Int_t i =0;i<18;i++){
922 Double_t phi = (20.*i);
923 rwh[i]=new TGeoRotation();
924 rwh[i]->RotateZ(phi);
925 wheela->AddNode(secta,i+1,rwh[i]);
926 wheelc->AddNode(sectc,i+1,rwh[i]);
929 // wheels in the drift volume!
931 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
932 v9->AddNode(wheela,1,combi3);
933 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
934 //_____________________________________________________________
935 // service support wheel
936 //_____________________________________________________________
937 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
938 sw->DefineSection(0,-4.,80.5,251.75);
939 sw->DefineSection(1,4.,80.5,251.75);
940 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
943 shift = thick/TMath::Sin(openingAngle);
944 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
945 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
946 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
947 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
949 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
950 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
951 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
952 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
953 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
958 ys = shift*TMath::Sin(openingAngle);
959 xs = shift*TMath::Cos(openingAngle);
960 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
962 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
963 co->DefineSection(0,-0.5,77.,255.25);
964 co->DefineSection(1,0.5,77.,255.25);
965 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
967 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
968 shift=4./TMath::Sin(openingAngle);
969 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
970 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
972 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
974 ys = shift*TMath::Sin(openingAngle);
975 xs = shift*TMath::Cos(openingAngle);
976 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
978 // Sector as an Assembly
980 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
981 swhs->AddNode(swv,1);
982 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
983 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
985 // SSW as an Assembly of sectors
987 TGeoRotation *rsw[18];
988 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
989 for(Int_t i =0;i<18;i++){
990 Double_t phi = (20.*i);
991 rsw[i] = new TGeoRotation();
992 rsw[i]->RotateZ(phi);
993 swheel->AddNode(swhs,i+1,rsw[i]);
995 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
996 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
998 // sensitive strips - strip "0" is always set
1001 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
1004 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
1005 upar=new Double_t [10];
1014 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
1021 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
1022 gGeoManager->Node("TPC_Strip",totrows+1,
1023 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
1025 // now, strips optionally
1029 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
1030 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
1035 gGeoManager->Node("TPC_Strip",i,
1036 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
1037 gGeoManager->Node("TPC_Strip",totrows+i,
1038 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
1041 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
1042 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
1047 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
1048 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
1049 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
1050 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
1053 //----------------------------------------------------------
1054 // TPC Support Rods - MAKROLON
1055 //----------------------------------------------------------
1056 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
1057 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
1058 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
1059 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");;
1060 TGeoMedium *m13 = gGeoManager->GetMedium("TPC_Brass");
1061 TGeoMedium *m14 = gGeoManager->GetMedium("TPC_Alumina1");
1063 // tpc rod is an assembly of 10 long parts and 2 short parts
1064 // connected with alu rings and plagged on both sides.
1069 TGeoPcon *rod = new TGeoPcon("rod",0.,360.,6);
1070 rod->DefineSection(0,-10.43,1.92,2.08);
1071 rod->DefineSection(1,-9.75,1.92,2.08);
1073 rod->DefineSection(2,-9.75,1.8,2.2);
1074 rod->DefineSection(3,9.75,1.8,2.2);
1076 rod->DefineSection(4,9.75,1.92,2.08);
1077 rod->DefineSection(5,10.43,1.92,2.08);
1079 TGeoVolume *mrodl = new TGeoVolume("TPC_mrodl",rod,m6);
1083 TGeoPcon *rod1 = new TGeoPcon("rod1",0.,360.,6);
1084 rod1->DefineSection(0,-8.93,1.92,2.08);
1085 rod1->DefineSection(1,-8.25,1.92,2.08);
1087 rod1->DefineSection(2,-8.25,1.8,2.2);
1088 rod1->DefineSection(3,8.25,1.8,2.2);
1090 rod1->DefineSection(4,8.25,1.92,2.08);
1091 rod1->DefineSection(5,8.93,1.92,2.08);
1093 TGeoVolume *mrods = new TGeoVolume("TPC_mrods",rod1,m6);
1095 // below is for the resistor rod
1097 // hole for the brass connectors
1100 new TGeoTube("hhole",0.,0.3,0.3);
1102 //transformations for holes - initialy they
1103 // are placed at x=0 and negative y
1105 TGeoRotation *rhole = new TGeoRotation();
1106 rhole->RotateX(90.);
1107 TGeoCombiTrans *transf[13];
1109 for(Int_t i=0;i<13;i++){
1110 //sprintf(name,"transf%d",i);
1111 snprintf(name,30,"transf%d",i);
1112 transf[i]= new TGeoCombiTrans(name,0.,-2.,-9.+i*1.5,rhole);
1113 transf[i]->RegisterYourself();
1115 // union expression for holes
1116 TString operl("hhole:transf0");
1117 for (Int_t i=1;i<13;i++){
1118 //sprintf(name,"+hhole:transf%d",i);
1119 snprintf(name,30,"+hhole:transf%d",i);
1123 TString opers("hhole:transf1");
1124 for (Int_t i=2;i<12;i++){
1125 //sprintf(name,"+hhole:transf%d",i);
1126 snprintf(name,30,"+hhole:transf%d",i);
1130 new TGeoCompositeShape("hlv",operl.Data());
1131 new TGeoCompositeShape("hsv",opers.Data());
1133 TGeoCompositeShape *rodl = new TGeoCompositeShape("rodl","rod-hlv");
1134 TGeoCompositeShape *rods = new TGeoCompositeShape("rods","rod1-hsv");
1135 //rods - volumes - makrolon rods with holes
1136 TGeoVolume *rodlv = new TGeoVolume("TPC_rodl",rodl,m6);
1137 TGeoVolume *rodsv = new TGeoVolume("TPC_rods",rods,m6);
1140 TGeoTube *bcon = new TGeoTube(0.,0.3,0.3);//connectors
1141 TGeoVolume *bconv = new TGeoVolume("TPC_bcon",bcon,m13);
1143 // hooks holding strips
1145 new TGeoBBox("hk1",0.625,0.015,0.75);
1146 new TGeoBBox("hk2",0.625,0.015,0.15);
1147 TGeoTranslation *tr21 = new TGeoTranslation("tr21",0.,-0.03,-0.6);
1148 TGeoTranslation *tr12 = new TGeoTranslation("tr12",0.,-0.03,0.6);
1149 tr21->RegisterYourself();
1150 tr12->RegisterYourself();
1152 TGeoCompositeShape *hook = new TGeoCompositeShape("hook","hk1+hk2:tr21+hk2:tr12");
1153 TGeoVolume *hookv = new TGeoVolume("TPC_hook",hook,m13);
1155 // assembly of the short rod with connectors and hooks
1160 TGeoVolumeAssembly *spart = new TGeoVolumeAssembly("TPC_spart");
1162 spart->AddNode( rodsv,1);
1163 for(Int_t i=1;i<12;i++){
1164 spart->AddNode(bconv,i,transf[i]);
1166 for(Int_t i =0;i<11;i++){
1167 spart->AddNode(hookv,i+1,new TGeoTranslation(0.,-2.315,-7.5+i*1.5));
1172 TGeoVolumeAssembly *lpart = new TGeoVolumeAssembly("TPC_lpart");
1174 lpart->AddNode( rodlv,1);
1175 for(Int_t i=0;i<13;i++){
1176 lpart->AddNode(bconv,i+12,transf[i]);
1178 for(Int_t i =0;i<13;i++){
1179 lpart->AddNode(hookv,i+12,new TGeoTranslation(0.,-2.315,-9.+i*1.5));
1184 new TGeoTube("ring1",2.1075,2.235,0.53);
1185 new TGeoTube("ring2",1.7925,1.89,0.43);
1186 new TGeoTube("ring3",1.89,2.1075,0.05);
1187 TGeoCompositeShape *ring = new TGeoCompositeShape("ring","ring1+ring2+ring3");
1188 TGeoVolume *ringv = new TGeoVolume("TPC_ring",ring,m3);
1192 TGeoVolumeAssembly *tpcrrod = new TGeoVolumeAssembly("TPC_rrod");//rrod
1193 TGeoVolumeAssembly *tpcmrod = new TGeoVolumeAssembly("TPC_mrod");//makrolon rod
1195 for(Int_t i=0;i<11;i++){
1196 tpcrrod->AddNode(ringv,i+1,new TGeoTranslation(0.,0.,-105.+i*21));
1197 tpcmrod->AddNode(ringv,i+12,new TGeoTranslation(0.,0.,-105.+i*21));
1199 for(Int_t i=0;i<10;i++){
1200 tpcrrod->AddNode(lpart,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));//resistor rod
1201 tpcmrod->AddNode(mrodl,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));//makrolon rod
1204 // right plug - identical for all rods
1206 TGeoPcon *tpcrp = new TGeoPcon(0.,360.,6);
1208 tpcrp->DefineSection(0,123.05,1.89,2.1075);
1209 tpcrp->DefineSection(1,123.59,1.89,2.1075);
1211 tpcrp->DefineSection(2,123.59,1.8,2.2);
1212 tpcrp->DefineSection(3,127.,1.8,2.2);
1214 tpcrp->DefineSection(4,127.,0.,2.2);
1215 tpcrp->DefineSection(5,127.5,0.,2.2);
1217 TGeoVolume *tpcrpv = new TGeoVolume("TPC_RP",tpcrp,m6);
1219 // adding short pieces and right plug
1221 tpcrrod->AddNode(spart,1,new TGeoTranslation(0.,0.,-114.));
1222 tpcrrod->AddNode(spart,2,new TGeoTranslation(0.,0.,114.));
1223 tpcrrod->AddNode(ringv,23,new TGeoTranslation(0.,0.,-123.));
1224 tpcrrod->AddNode(ringv,24,new TGeoTranslation(0.,0.,123.));
1225 tpcrrod->AddNode(tpcrpv,1);
1227 tpcmrod->AddNode(mrods,1,new TGeoTranslation(0.,0.,-114.));
1228 tpcmrod->AddNode(mrods,2,new TGeoTranslation(0.,0.,114.));
1229 tpcmrod->AddNode(ringv,25,new TGeoTranslation(0.,0.,-123.));
1230 tpcmrod->AddNode(ringv,26,new TGeoTranslation(0.,0.,123.));
1231 tpcmrod->AddNode(tpcrpv,2);
1233 // from the ringv position to the CM is 3.0 cm!
1234 //----------------------------------------
1237 //HV rods - makrolon + 0.58cm (diameter) Cu ->check the length
1238 TGeoTube *hvr = new TGeoTube(0.,1.465,123.);
1239 TGeoTube *hvc = new TGeoTube(0.,0.29,123.);
1241 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
1242 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
1243 hvrv->AddNode(hvcv,1);
1247 TGeoTube *cr = new TGeoTube(0.,0.45,123.);
1248 TGeoTube *cw = new TGeoTube(0.,0.15,123.);
1249 TGeoVolume *crv = new TGeoVolume("TPC_CR",cr,m10);
1250 TGeoVolume *cwv = new TGeoVolume("TPC_W",cw,m12);
1252 // ceramic rod with water
1254 crv->AddNode(cwv,1);
1258 TGeoTube *pr =new TGeoTube(0.2,0.35,123.);
1259 TGeoVolume *prv = new TGeoVolume("TPC_PR",pr,m11);
1261 // copper plates with connectors
1263 new TGeoTube("tub",0.,1.7,0.025);
1265 // half space - points on the plane and a normal vector
1268 Double_t slope = TMath::Tan(22.*TMath::DegToRad());
1269 Double_t intp = 1.245;
1271 Double_t b = slope*slope+1.;
1280 norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
1284 new TGeoHalfSpace("sp1",p,n);
1293 norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
1297 new TGeoHalfSpace("sp2",p,n);
1300 new TGeoTube("h1",0.,0.5,0.025);
1301 new TGeoTube("h2",0.,0.35,0.025);
1303 TGeoTranslation *ttr11 = new TGeoTranslation("ttr11",-0.866,0.5,0.);
1304 TGeoTranslation *ttr22 = new TGeoTranslation("ttr22",0.866,0.5,0.);
1305 ttr11->RegisterYourself();
1306 ttr22->RegisterYourself();
1307 // elastic connector
1308 new TGeoBBox("elcon",0.72,0.005,0.3);
1309 TGeoRotation *crr1 = new TGeoRotation();
1310 crr1->RotateZ(-22.);
1311 TGeoCombiTrans *ctr1 = new TGeoCombiTrans("ctr1",-0.36011, -1.09951,-0.325,crr1);
1312 ctr1->RegisterYourself();
1313 TGeoCompositeShape *cs1 = new TGeoCompositeShape("cs1",
1314 "(((((tub-h1:ttr11)-h1:ttr22)-sp1)-sp2)-h2)+elcon:ctr1");
1316 TGeoVolume *csvv = new TGeoVolume("TPC_RR_CU",cs1,m7);
1318 // resistor rod assembly 2 ceramic rods, peak rod, Cu plates
1321 TGeoVolumeAssembly *rrod = new TGeoVolumeAssembly("TPC_RRIN");
1323 rrod->AddNode(crv,1,ttr11);
1324 rrod->AddNode(crv,2,ttr22);
1325 rrod->AddNode(prv,1);
1327 for(Int_t i=0;i<165;i++){
1328 rrod->AddNode(csvv,i+1,new TGeoTranslation(0.,0.,-122.675+i*1.5));
1331 TGeoTube *res = new TGeoTube(0.,0.15,0.5);
1332 TGeoVolume *resv = new TGeoVolume("TPC_RES",res,m14);
1333 TGeoVolumeAssembly *ress = new TGeoVolumeAssembly("TPC_RES_CH");
1334 ress->AddNode(resv,1,new TGeoTranslation(0.2,0.,0.));
1335 ress->AddNode(resv,2,new TGeoTranslation(-0.2,0.,0.));
1337 TGeoRotation *crr2 = new TGeoRotation();
1339 TGeoRotation *crr3 = new TGeoRotation();
1340 crr3->RotateY(-30.);
1342 for(Int_t i=0;i<164;i+=2){
1343 rrod->AddNode(ress,i+1, new TGeoCombiTrans(0.,1.2,-121.925+i*1.5,crr2));
1344 rrod->AddNode(ress,i+2, new TGeoCombiTrans(0.,1.2,-121.925+(i+1)*1.5,crr3));
1347 tpcrrod->AddNode(rrod,1,new TGeoCombiTrans(0.,0.,0.5,crr1));
1349 // rod left head with holders - inner
1351 // first element - support for inner holder TPC_IHS
1352 Double_t shift1[3] = {0.0,-0.175,0.0};
1354 new TGeoBBox("tpcihs1", 4.7, 0.66, 2.35);
1355 new TGeoBBox("tpcihs2", 4.7, 0.485, 1.0, shift1);
1356 new TGeoBBox("tpcihs3", 1.5, 0.485, 2.35, shift1);
1357 new TGeoTube("tpcihs4", 0.0, 2.38, 0.1);
1359 Double_t pointstrap[16];
1363 pointstrap[3]= 1.08;
1365 pointstrap[5]= 1.08;
1366 pointstrap[6]= 3.38;
1370 pointstrap[10]= 0.0;
1371 pointstrap[11]= 1.08;
1372 pointstrap[12]= 2.3;
1373 pointstrap[13]= 1.08;
1374 pointstrap[14]= 3.38;
1375 pointstrap[15]= 0.0;
1377 TGeoArb8 *tpcihs5 = new TGeoArb8("tpcihs5", 0.6, pointstrap);
1379 // half space - cutting "legs"
1389 new TGeoHalfSpace("cutil1", p, n);
1394 TGeoTranslation *trans2 = new TGeoTranslation("trans2", 0.0, 2.84, 2.25);
1395 trans2->RegisterYourself();
1396 TGeoTranslation*trans3= new TGeoTranslation("trans3", 0.0, 2.84, -2.25);
1397 trans3->RegisterYourself();
1398 //support - composite volume
1400 TGeoCompositeShape *tpcihs6 = new TGeoCompositeShape("tpcihs6", "tpcihs1-(tpcihs2+tpcihs3)-(tpcihs4:trans2)-(tpcihs4:trans3)-cutil1");
1402 // volumes - all makrolon
1404 TGeoVolume *tpcihss = new TGeoVolume("TPC_IHSS", tpcihs6, m6); //support
1405 TGeoVolume *tpcihst = new TGeoVolume("TPC_IHSTR",tpcihs5 , m6); //trapesoid
1407 TGeoRotation *rot111 = new TGeoRotation();
1408 rot111->RotateY(180.0);
1410 TGeoVolumeAssembly *tpcihs = new TGeoVolumeAssembly("TPC_IHS"); // assembly of the support
1411 tpcihs->AddNode(tpcihss, 1);
1412 tpcihs->AddNode(tpcihst, 1, new TGeoTranslation(-4.7, 0.66, 0.0));
1413 tpcihs->AddNode(tpcihst, 2, new TGeoCombiTrans(4.7, 0.66, 0.0, rot111));
1415 // two rod holders (TPC_IRH) assembled with the support
1417 new TGeoBBox("tpcirh1", 4.7, 1.33, 0.5);
1421 new TGeoBBox("tpcirh2", 1.05, 0.8, 0.5, shift1);
1425 new TGeoBBox("tpcirh3", 1.05, 0.8, 0.5, shift1);
1429 new TGeoBBox("tpcirh4", 1.9, 0.25, 0.5, shift1);
1430 new TGeoTube("tpcirh5", 0, 1.9, 5);
1432 TGeoTranslation *trans4 = new TGeoTranslation("trans4", 0, 0.83, 0.0);
1433 trans4->RegisterYourself();
1435 TGeoCompositeShape *tpcirh6 = new TGeoCompositeShape("tpcirh6", "tpcirh1-tpcirh2-tpcirh3-(tpcirh5:trans4)-tpcirh4");
1439 TGeoVolume *tpcirh = new TGeoVolume("TPC_IRH", tpcirh6, m6);
1441 // and all together...
1443 TGeoVolume *tpciclamp = new TGeoVolumeAssembly("TPC_ICLP");
1444 tpciclamp->AddNode(tpcihs, 1);
1445 tpciclamp->AddNode(tpcirh, 1, new TGeoTranslation(0, 1.99, 1.1));
1446 tpciclamp->AddNode(tpcirh, 2, new TGeoTranslation(0, 1.99, -1.1));
1448 // and now left inner "head"
1450 TGeoPcon *inplug = new TGeoPcon("inplug", 0.0, 360.0, 14);
1452 inplug->DefineSection(0, 0.3, 0.0, 2.2);
1453 inplug->DefineSection(1, 0.6, 0.0, 2.2);
1455 inplug->DefineSection(2, 0.6, 0.0, 1.75);
1456 inplug->DefineSection(3, 0.7, 0.0, 1.75);
1458 inplug->DefineSection(4, 0.7, 1.55, 1.75);
1459 inplug->DefineSection(5, 1.6, 1.55, 1.75);
1461 inplug->DefineSection(6, 1.6, 1.55, 2.2);
1462 inplug->DefineSection(7, 1.875, 1.55, 2.2);
1464 inplug->DefineSection(8, 1.875, 1.55, 2.2);
1465 inplug->DefineSection(9, 2.47, 1.75, 2.2);
1467 inplug->DefineSection(10, 2.47, 1.75, 2.08);
1468 inplug->DefineSection(11, 2.57, 1.8, 2.08);
1470 inplug->DefineSection(12, 2.57, 1.92, 2.08);
1471 inplug->DefineSection(13, 2.95, 1.92, 2.08);
1477 new TGeoBBox("pcuti", 1.5, 0.11, 1.075, shift1);
1479 TGeoCompositeShape *inplleft = new TGeoCompositeShape("inplleft", "inplug-pcuti");
1480 TGeoVolume *tpcinlplug = new TGeoVolume("TPC_INPLL", inplleft, m6);
1484 TGeoVolume *tpcihpl = new TGeoVolumeAssembly("TPC_IHPL"); //holder+2 plugs (reflected)
1485 tpcihpl->AddNode(tpcinlplug, 1);
1486 tpcihpl->AddNode(tpcinlplug, 2,ref);
1487 tpcihpl->AddNode(tpciclamp,1,new TGeoTranslation(0.0, -2.765, 0.0));
1489 // outer holders and clamps
1492 // outer membrane holder (between rods)
1498 pointstrap[5]= 2.8-3.1*TMath::Tan(15.*TMath::DegToRad());
1503 pointstrap[10]= 0.0;
1504 pointstrap[11]= 2.8;
1505 pointstrap[12]= 3.1;
1506 pointstrap[13]= 2.8-3.1*TMath::Tan(15.*TMath::DegToRad());
1507 pointstrap[14]= 3.1;
1508 pointstrap[15]= 0.0;
1510 TGeoArb8 *tpcomh1 = new TGeoArb8("tpcomh1", 1.05, pointstrap);
1511 TGeoBBox *tpcomh2 = new TGeoBBox("tpcomh2", 0.8, 1.4, 6);
1513 TGeoVolume *tpcomh1v = new TGeoVolume("TPC_OMH1", tpcomh1, m7);
1514 TGeoVolume *tpcomh2v = new TGeoVolume("TPC_OMH2", tpcomh2, m7);
1516 TGeoVolume *tpcomh3v = new TGeoVolumeAssembly("TPC_OMH3"); // assembly1
1517 tpcomh3v->AddNode(tpcomh1v, 1, new TGeoTranslation(0.8, -1.4, 4.95));
1518 tpcomh3v->AddNode(tpcomh1v, 2, new TGeoTranslation(0.8, -1.4, -4.95));
1519 tpcomh3v->AddNode(tpcomh2v, 1);
1525 new TGeoBBox("tpcomh3", 1.65, 1.15, 3.4);
1526 TGeoBBox *tpcomh4 = new TGeoBBox("tpcomh4", 0.75, 0.7, 3.4, shift1);
1535 n[1] = -1.0*TMath::Tan(30.*TMath::DegToRad());
1538 new TGeoHalfSpace("cutomh1", p, n);
1547 n[1] = -1.0*TMath::Tan(30.*TMath::DegToRad());
1550 new TGeoHalfSpace("cutomh2", p, n);
1558 n[0] = 1.0*TMath::Tan(75.*TMath::DegToRad());
1562 new TGeoHalfSpace("cutomh3", p, n);
1570 n[0] = 1.0*TMath::Tan(75*TMath::DegToRad());
1574 new TGeoHalfSpace("cutomh4", p, n);
1583 n[1] = -1.0*TMath::Tan(20.*TMath::DegToRad());
1586 new TGeoHalfSpace("cutomh5", p, n);
1588 TGeoCompositeShape *tpcomh5 = new TGeoCompositeShape("tpcomh5", "tpcomh3-cutomh1-cutomh2-cutomh3-cutomh4-cutomh5");
1590 TGeoVolume *tpcomh5v = new TGeoVolume("TPC_OMH5",tpcomh5,m6);
1591 TGeoVolume *tpcomh4v = new TGeoVolume("TPC_OMH6",tpcomh4,m6);
1593 TGeoVolumeAssembly *tpcomh7v = new TGeoVolumeAssembly("TPC_OMH7");
1594 tpcomh7v->AddNode(tpcomh5v,1);
1595 tpcomh7v->AddNode(tpcomh4v,1);
1597 // full membrane holder - tpcomh3v + tpcomh7v
1599 TGeoVolumeAssembly *tpcomh = new TGeoVolumeAssembly("TPC_OMH");
1600 tpcomh->AddNode(tpcomh3v,1,new TGeoTranslation(1.5,0.,0.));
1601 tpcomh->AddNode(tpcomh3v,2,new TGeoCombiTrans(-1.5,0.,0.,rot111));
1602 tpcomh->AddNode(tpcomh7v,1,new TGeoTranslation(0.65+1.5, 2.55, 0.0));
1603 tpcomh->AddNode(tpcomh7v,2,new TGeoCombiTrans(-0.65-1.5, 2.55, 0.0,rot111));
1605 // outer rod holder support
1607 new TGeoBBox("tpcohs1", 3.8, 0.675, 2.35);
1613 new TGeoBBox("tpcohs2", 1.5, 0.5, 2.35, shift1);
1614 new TGeoBBox("tpcohs3", 3.8, 0.5, 0.85, shift1);
1620 TGeoBBox *tpcohs4 = new TGeoBBox("tpsohs4", 3.1, 0.5, 0.7, shift1);
1622 TGeoVolume *tpcohs4v = new TGeoVolume("TPC_OHS4", tpcohs4, m6);
1632 new TGeoHalfSpace("cutohs1", p, n);
1634 TGeoCompositeShape *tpcohs5 = new TGeoCompositeShape("tpcohs5", "tpcohs1-tpcohs2-tpcohs3-cutohs1");
1635 TGeoVolume *tpcohs5v = new TGeoVolume("TPC_OHS5", tpcohs5, m6);
1637 TGeoVolumeAssembly *tpcohs = new TGeoVolumeAssembly("TPC_OHS");
1638 tpcohs->AddNode(tpcohs5v, 1);
1639 tpcohs->AddNode(tpcohs4v, 1);
1641 // outer rod holder itself
1646 new TGeoBBox("tpcorh1", 3.1, 1.825, 0.55); //from this box we cut pieces...
1652 new TGeoBBox("tpcorh2", 0.5, 2.75, 1.1, shift1);
1658 new TGeoBBox("tpcorh3", 0.5, 2.75, 1.1, shift1);
1664 new TGeoBBox("tpcorh4", 3.9, 2.75, 0.5, shift1);
1670 new TGeoBBox("tpcorh5", 1.95, 0.5, 1.1, shift1);
1676 new TGeoBBox("tpcorh6", 2.4, 0.5, 0.6, shift1);
1678 new TGeoTube("tpcorh7", 0, 1.95, 0.85);
1679 new TGeoTube("tpcorh8", 0, 2.4, 0.6);
1681 TGeoTranslation *trans33 = new TGeoTranslation("trans33", 0.0, 0.0, 0.55);
1682 trans33->RegisterYourself();
1684 TGeoCompositeShape *tpcorh9 = new TGeoCompositeShape("tpcorh9", "tpcorh1-tpcorh2-tpcorh3-tpcorh4-tpcorh5-tpcorh6-(tpcorh8:trans33)-tpcorh7");
1686 TGeoVolume *tpcorh9v = new TGeoVolume("TPC_ORH",tpcorh9,m6); //outer rod holder
1688 // now 2 holders together
1690 TGeoVolumeAssembly *tpcorh = new TGeoVolumeAssembly("TPC_ORH2");
1692 tpcorh->AddNode(tpcorh9v,1,new TGeoTranslation(0.0, 0.0, 1.25));
1693 tpcorh->AddNode(tpcorh9v,2,new TGeoCombiTrans(0.0, 0.0, -1.25,rot111));
1695 // outer rod plug left
1697 TGeoPcon *outplug = new TGeoPcon("outplug", 0.0, 360.0, 14);
1699 outplug->DefineSection(0, 0.5, 0.0, 2.2);
1700 outplug->DefineSection(1, 0.7, 0.0, 2.2);
1702 outplug->DefineSection(2, 0.7, 1.55, 2.2);
1703 outplug->DefineSection(3, 0.8, 1.55, 2.2);
1705 outplug->DefineSection(4, 0.8, 1.55, 1.75);
1706 outplug->DefineSection(5, 1.2, 1.55, 1.75);
1708 outplug->DefineSection(6, 1.2, 1.55, 2.2);
1709 outplug->DefineSection(7, 1.875, 1.55, 2.2);
1711 outplug->DefineSection(8, 1.875, 1.55, 2.2);
1712 outplug->DefineSection(9, 2.47, 1.75, 2.2);
1714 outplug->DefineSection(10, 2.47, 1.75, 2.08);
1715 outplug->DefineSection(11, 2.57, 1.8, 2.08);
1717 outplug->DefineSection(12, 2.57, 1.92, 2.08);
1718 outplug->DefineSection(13, 2.95, 1.92, 2.08);
1724 new TGeoBBox("cutout", 2.5, 0.11, 1.01, shift1);
1727 TGeoCompositeShape *outplleft = new TGeoCompositeShape("outplleft", "outplug-cutout");
1728 TGeoVolume *outplleftv = new TGeoVolume("TPC_OPLL", outplleft, m6);
1730 // support + holder + plug
1734 TGeoVolumeAssembly *tpcohpl = new TGeoVolumeAssembly("TPC_OHPL");
1736 tpcohpl->AddNode(outplleftv,1); //plug
1737 tpcohpl->AddNode(outplleftv,2,ref); //plug reflected
1738 tpcohpl->AddNode(tpcorh,1); //rod holder
1739 tpcohpl->AddNode(tpcohs,1,new TGeoTranslation(0.0, 3.925, 0)); // support
1743 // main membrane holder
1750 pointstrap[5]= 1.96;
1755 pointstrap[10]= 0.0;
1756 pointstrap[11]= 2.8;
1757 pointstrap[12]= 3.1;
1758 pointstrap[13]= 1.96;
1759 pointstrap[14]= 3.1;
1760 pointstrap[15]= 0.0;
1762 TGeoArb8 *tpcmmh1 = new TGeoArb8("tpcmmh1", 1.75, pointstrap);
1763 TGeoBBox *tpcmmh2 = new TGeoBBox("tpcmmh2", 0.8, 1.4, 12.5);
1765 TGeoVolume *tpcmmh1v = new TGeoVolume("TPC_MMH1", tpcmmh1, m6);
1766 TGeoVolume *tpcmmh2v = new TGeoVolume("TPC_MMH2", tpcmmh2, m6);
1768 TGeoVolumeAssembly *tpcmmhs = new TGeoVolumeAssembly("TPC_MMHS");
1769 tpcmmhs->AddNode(tpcmmh1v,1,new TGeoTranslation(0.8, -1.4, 10.75));
1770 tpcmmhs->AddNode(tpcmmh1v,2,new TGeoTranslation(0.8, -1.4, -10.75));
1771 tpcmmhs->AddNode(tpcmmh2v,1);
1773 // main membrahe holder clamp
1779 new TGeoBBox("tpcmmhc1", 1.65, 1.85, 8.9);
1780 new TGeoBBox("tpcmmhc2", 0.9, 0.7, 8.9, shift1);
1782 // half spaces - cuts
1790 n[2] = 8.0*TMath::Tan(13.*TMath::DegToRad());
1792 new TGeoHalfSpace("cutmmh1", p, n);
1800 n[2] = -8.0*TMath::Tan(13.*TMath::DegToRad());
1802 new TGeoHalfSpace("cutmmh2", p, n);
1810 n[2] = 6.1*TMath::Tan(20.*TMath::DegToRad());
1812 new TGeoHalfSpace("cutmmh3", p, n);
1820 n[2] = -6.1*TMath::Tan(20*TMath::DegToRad());
1822 new TGeoHalfSpace("cutmmh4", p, n);
1828 n[0] = 2.4*TMath::Tan(30*TMath::DegToRad());
1832 new TGeoHalfSpace("cutmmh5", p, n);
1838 n[0] = 2.4*TMath::Tan(30*TMath::DegToRad());
1842 new TGeoHalfSpace("cutmmh6", p, n);
1844 TGeoCompositeShape *tpcmmhc = new TGeoCompositeShape("TPC_MMHC", "tpcmmhc1-tpcmmhc2-cutmmh1-cutmmh2-cutmmh3-cutmmh4-cutmmh5-cutmmh6");
1846 TGeoVolume *tpcmmhcv = new TGeoVolume("TPC_MMHC",tpcmmhc,m6);
1848 TGeoVolume *tpcmmh = new TGeoVolumeAssembly("TPC_MMH");
1850 tpcmmh->AddNode(tpcmmhcv,1,new TGeoTranslation(0.65+1.5, 1.85, 0.0));
1851 tpcmmh->AddNode(tpcmmhcv,2,new TGeoCombiTrans(-0.65-1.5, 1.85, 0.0,rot111));
1852 tpcmmh->AddNode(tpcmmhs,1,new TGeoTranslation(1.5, 0.0, 0.0));
1853 tpcmmh->AddNode(tpcmmhs,2,new TGeoCombiTrans(-1.5, 0.0, 0.0,rot111));
1858 //--------------------------------------------
1860 // guard ring resistor chain
1863 TGeoTube *gres1 = new TGeoTube(0.,0.375,125.);// inside ifc
1865 TGeoVolume *vgres1 = new TGeoVolume("TPC_GRES1",gres1,m14);
1870 xrc=79.3*TMath::Cos(350.*TMath::DegToRad());
1871 yrc=79.3*TMath::Sin(350.*TMath::DegToRad());
1873 v9->AddNode(vgres1,1,new TGeoTranslation(xrc,yrc,126.9));
1874 v9->AddNode(vgres1,2,new TGeoTranslation(xrc,yrc,-126.9));
1876 xrc=79.3*TMath::Cos(190.*TMath::DegToRad());
1877 yrc=79.3*TMath::Sin(190.*TMath::DegToRad());
1879 v9->AddNode(vgres1,3,new TGeoTranslation(xrc,yrc,126.9));
1880 v9->AddNode(vgres1,4,new TGeoTranslation(xrc,yrc,-126.9));
1881 //------------------------------------------------------------------
1882 TGeoRotation refl("refl",90.,0.,90.,90.,180.,0.);
1883 TGeoRotation rotrod("rotrod");
1885 TGeoRotation *rotpos[2];
1887 TGeoRotation *rotrod1[2];
1892 TGeoRotation rot102("rot102");
1893 rot102.RotateY(-90.);
1895 for(Int_t i=0;i<18;i++){
1898 angle=TMath::DegToRad()*20.*(Double_t)i;
1901 x=r * TMath::Cos(angle);
1902 y=r * TMath::Sin(angle);
1904 TGeoRotation *rot12 = new TGeoRotation();
1905 rot12->RotateZ(-90.0+i*20.);
1906 v9->AddNode(tpcihpl,i+1,new TGeoCombiTrans(x, y, 0., rot12));
1908 if(i==11){//resistor rod inner
1909 rotrod.RotateZ(-90.+angle);
1910 rotrod1[0]= new TGeoRotation();
1911 rotpos[0]= new TGeoRotation();
1913 rotrod1[0]->RotateZ(-90.+angle);
1914 *rotpos[0] = refl*rotrod; //rotation+reflection
1915 v9->AddNode(tpcrrod,1,new TGeoCombiTrans(x,y, z, rotrod1[0])); //A
1916 v9->AddNode(tpcrrod,2,new TGeoCombiTrans(x,y,-z, rotpos[0])); //C
1919 v9->AddNode(tpcmrod,i+1,new TGeoTranslation(x,y,z));//shaft
1920 v9->AddNode(tpcmrod,i+19,new TGeoCombiTrans(x,y,-z,ref));//muon
1924 x=r * TMath::Cos(angle);
1925 y=r * TMath::Sin(angle);
1928 // outer rod holder + outer left plug
1930 TGeoRotation *rot33 = new TGeoRotation();
1931 rot33->RotateZ(-90+i*20.);
1933 v9->AddNode(tpcohpl,i+1,new TGeoCombiTrans(x, y, 0., rot33));
1935 Double_t xxx = 256.297*TMath::Cos((i*20.+10.)*TMath::DegToRad());
1936 Double_t yyy = 256.297*TMath::Sin((i*20.+10.)*TMath::DegToRad());
1938 TGeoRotation rot101("rot101");
1939 rot101.RotateZ(90.+i*20.+10.);
1940 TGeoRotation *rot103 = new TGeoRotation("rot103");
1941 *rot103 = rot101*rot102;
1943 TGeoCombiTrans *trh100 = new TGeoCombiTrans(xxx,yyy,0.,rot103);
1946 //main membrane holder
1947 v9->AddNode(tpcmmh,1,trh100);
1950 // "normal" membrane holder
1951 v9->AddNode(tpcomh,i+1,trh100);
1955 if(i==3){//resistor rod outer
1956 rotrod.RotateZ(90.+angle);
1957 rotrod1[1]= new TGeoRotation();
1958 rotpos[1]= new TGeoRotation();
1959 rotrod1[1]->RotateZ(90.+angle);
1960 *rotpos[1] = refl*rotrod;//rotation+reflection
1961 v9->AddNode(tpcrrod,3,new TGeoCombiTrans(x,y, z, rotrod1[1])); //A
1962 v9->AddNode(tpcrrod,4,new TGeoCombiTrans(x,y, -z, rotpos[1])); //C
1965 v9->AddNode(tpcmrod,i+37,new TGeoTranslation(x,y,z));//shaft
1966 v9->AddNode(tpcmrod,i+55,new TGeoCombiTrans(x,y,-z,ref));//muon
1969 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z+0.7)); //hv->A-side only
1973 } //end of rods positioning
1975 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
1976 alice->AddNode(v1,1);
1978 } // end of function
1980 //_____________________________________________________________________________
1981 void AliTPCv2::AddAlignableVolumes() const
1984 // Create entries for alignable volumes associating the symbolic volume
1985 // name with the corresponding volume path. Needs to be syncronized with
1986 // eventual changes in the geometry.
1988 SetInnerChambersAlignable();
1989 SetOuterChambersAlignable();
1992 //_____________________________________________________________________________
1993 void AliTPCv2::SetInnerChambersAlignable() const
1996 AliGeomManager::ELayerID idTPC1 = AliGeomManager::kTPC1;
1997 Int_t modUID, modnum = 0;
1998 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1999 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
2000 TString vpappend = "/TPC_IROC_1";
2001 TString snstr1="TPC/EndcapA/Sector";
2002 TString snstr2="TPC/EndcapC/Sector";
2003 TString snappend="/InnerChamber";
2004 TString volpath, symname;
2006 for(Int_t cnt=1; cnt<=18; cnt++){
2007 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
2010 volpath += vpappend;
2013 symname += snappend;
2014 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
2015 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
2016 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
2017 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
2018 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
2019 alignableEntry->SetMatrix(matTtoL);
2022 for(Int_t cnt=1; cnt<=18; cnt++){
2023 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
2026 volpath += vpappend;
2029 symname += snappend;
2030 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
2031 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
2032 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
2033 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
2034 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
2035 alignableEntry->SetMatrix(matTtoL);
2039 //_____________________________________________________________________________
2040 void AliTPCv2::SetOuterChambersAlignable() const
2043 AliGeomManager::ELayerID idTPC2 = AliGeomManager::kTPC2;
2044 Int_t modUID, modnum = 0;
2045 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
2046 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
2047 TString vpappend = "/TPC_OROC_1";
2048 TString snstr1="TPC/EndcapA/Sector";
2049 TString snstr2="TPC/EndcapC/Sector";
2050 TString snappend="/OuterChamber";
2051 TString volpath, symname;
2053 for(Int_t cnt=1; cnt<=18; cnt++){
2054 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
2057 volpath += vpappend;
2060 symname += snappend;
2061 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
2062 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
2063 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
2064 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
2065 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
2066 alignableEntry->SetMatrix(matTtoL);
2069 for(Int_t cnt=1; cnt<=18; cnt++){
2070 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
2073 volpath += vpappend;
2076 symname += snappend;
2077 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
2078 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
2079 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
2080 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
2081 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
2082 alignableEntry->SetMatrix(matTtoL);
2087 //_____________________________________________________________________________
2088 void AliTPCv2::CreateMaterials()
2091 // Define materials for version 2 of the Time Projection Chamber
2094 AliTPC::CreateMaterials();
2097 //_____________________________________________________________________________
2098 void AliTPCv2::Init()
2101 // Initialises version 2 of the TPC after that it has been built
2104 Int_t *idtmed = fIdtmed->GetArray();
2109 fIdSens=TVirtualMC::GetMC()->VolId("TPC_Strip"); // one strip is always selected...
2111 fIDrift=TVirtualMC::GetMC()->VolId("TPC_Drift");
2112 fSecOld=-100; // fake number
2114 TVirtualMC::GetMC()->SetMaxNStep(-120000); // max. number of steps increased
2116 if (fPrimaryIonisation) {
2118 TVirtualMC::GetMC()->Gstpar(idtmed[2],"PRIMIO_E", 20.77); // 1st ionisation potential
2120 TVirtualMC::GetMC()->Gstpar(idtmed[2],"PRIMIO_N", 14.35);
2121 TVirtualMC::GetMC()->Gstpar(idtmed[2],"LOSS", 14); // specific energy loss
2122 TVirtualMC::GetMC()->Gstpar(idtmed[2],"STRA",4);
2124 // specific energy loss for geant3 is now defined in galice.cuts
2127 AliDebug(1,"*** TPC version 2 initialized ***");
2128 AliDebug(1,Form("Maximum number of steps = %d",TVirtualMC::GetMC()->GetMaxNStep()));
2134 //_____________________________________________________________________________
2135 void AliTPCv2::StepManager()
2138 // Called for every step in the Time Projection Chamber
2142 // parameters used for the energy loss calculations
2144 //const Float_t kprim = 14.35; // number of primary collisions per 1 cm
2145 //const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
2146 //const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
2147 const Float_t kScalewIonG4 = 0.85; // scale factor to tune kwIon for Geant4
2148 const Float_t kFanoFactorG4 = 0.7; // parameter for smearing the number of ionizations (nel) using Geant4
2149 const Int_t kMaxDistRef =15; // maximal difference between 2 stored references
2150 Float_t prim = fTPCParam->GetNprim();
2151 Float_t poti = fTPCParam->GetFpot();
2152 Float_t wIon = fTPCParam->GetWmean();
2154 const Float_t kbig = 1.e10;
2161 vol[1]=0; // preset row number to 0
2163 if (!fPrimaryIonisation) TVirtualMC::GetMC()->SetMaxStep(kbig);
2165 if(!TVirtualMC::GetMC()->IsTrackAlive()) return; // particle has disappeared
2167 Float_t charge = TVirtualMC::GetMC()->TrackCharge();
2169 if(TMath::Abs(charge)<=0.) return; // take only charged particles
2171 // check the sensitive volume
2173 id = TVirtualMC::GetMC()->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
2174 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
2176 if ( fPrimaryIonisation && id == fIDrift ) {
2177 Double_t rnd = TVirtualMC::GetMC()->GetRandom()->Rndm();
2178 TVirtualMC::GetMC()->SetMaxStep(0.2+(2.*rnd-1.)*0.05); // 2 mm +- rndm*0.5mm step
2181 //if ( fPrimaryIonisation && id == fIDrift && TVirtualMC::GetMC()->IsTrackEntering()) {
2182 // TVirtualMC::GetMC()->SetMaxStep(0.2); // 2 mm
2185 TVirtualMC::GetMC()->TrackPosition(p);
2186 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
2190 Double_t angle = TMath::ACos(p[0]/r);
2191 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
2193 // angular segment, it is not a real sector number...
2195 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
2196 fTPCParam->GetInnerAngle());
2197 // rotate to segment "0"
2199 fTPCParam->AdjustCosSin(sector,cos,sin);
2200 Float_t x1=p[0]*cos + p[1]*sin;
2201 // check if within sector's limits
2202 if((x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp())
2203 ||(x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp())){
2204 // calculate real sector number...
2205 if (x1>fTPCParam->GetOuterRadiusLow()){
2206 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
2207 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
2208 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
2211 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
2213 // here I have a sector number
2218 static Double_t lastReferenceR=0;
2219 if (TMath::Abs(lastReferenceR-r)>kMaxDistRef){
2220 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
2224 // check if change of sector
2225 if(sector != fSecOld){
2227 // add track reference
2228 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
2230 // track is in the sensitive strip
2232 // track is entering the strip
2233 if (TVirtualMC::GetMC()->IsTrackEntering()){
2234 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
2235 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
2236 // row numbers are autonomous for lower and upper sectors
2237 if(vol[0] > fTPCParam->GetNInnerSector()) {
2238 vol[1] -= fTPCParam->GetNRowLow();
2241 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
2243 // lower sector, row 0, because Jouri wants to have this
2245 TVirtualMC::GetMC()->TrackMomentum(p);
2249 hits[3]=0.; // this hit has no energy loss
2250 // Get also the track time for pileup simulation
2251 hits[4]=TVirtualMC::GetMC()->TrackTime();
2253 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
2257 TVirtualMC::GetMC()->TrackPosition(p);
2261 hits[3]=0.; // this hit has no energy loss
2262 // Get also the track time for pileup simulation
2263 hits[4]=TVirtualMC::GetMC()->TrackTime();
2265 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
2270 //-----------------------------------------------------------------
2271 // charged particle is in the sensitive drift volume
2272 //-----------------------------------------------------------------
2273 if(TVirtualMC::GetMC()->TrackStep() > 0) {
2275 if (!fPrimaryIonisation) {
2276 nel = (Int_t)(((TVirtualMC::GetMC()->Edep())-poti)/wIon) + 1;
2281 static Double_t deForNextStep = 0.;
2282 // Geant4 (the meaning of Edep as in Geant3) - wrong
2283 //nel = (Int_t)(((TVirtualMC::GetMC()->Edep())-poti)/wIon) + 1;
2285 // Geant4 (the meaning of Edep as in Geant3) - NEW
2286 Double_t eAvailable = TVirtualMC::GetMC()->Edep() + deForNextStep;
2287 nel = (Int_t)(eAvailable/wIon);
2288 deForNextStep = eAvailable - nel*wIon;
2291 //new Geant4-approach
2292 Double_t meanIon = TVirtualMC::GetMC()->Edep()/(wIon*kScalewIonG4);
2293 nel = (Int_t) ( kFanoFactorG4*AliMathBase::Gamma(meanIon/kFanoFactorG4)); // smear nel using gamma distr w mean = meanIon and variance = meanIon/kFanoFactorG4
2295 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
2297 TVirtualMC::GetMC()->TrackPosition(p);
2301 hits[3]=(Float_t)nel;
2305 // if (fHitType&&2){
2307 TVirtualMC::GetMC()->TrackMomentum(p);
2308 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
2309 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
2310 fTrackHits->SetHitPrecision(precision);
2313 // Get also the track time for pileup simulation
2314 hits[4]=TVirtualMC::GetMC()->TrackTime();
2316 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
2317 if (fDebugStreamer){
2318 // You can dump here what you need
2319 // function CreateDebugStremer() to be called in the Config.C macro
2320 // if you want to enable it
2321 // By default debug streaemer is OFF
2322 Float_t edep = TVirtualMC::GetMC()->Edep();
2323 Float_t tstep = TVirtualMC::GetMC()->TrackStep();
2324 Int_t pid=TVirtualMC::GetMC()->TrackPid();
2325 (*fDebugStreamer)<<"hit"<<
2326 "x="<<hits[0]<< // hit position
2329 "nel="<<hits[3]<< // number of electorns
2330 "tof="<<hits[4]<< // hit TOF
2331 "edep="<<edep<< // energy deposit
2332 "pid="<<pid<< // pid
2339 } //within sector's limits
2340 // Stemax calculation for the next step
2344 // below is valid only for Geant3 (fPromaryIonisation not set)
2345 if(!fPrimaryIonisation){
2346 TVirtualMC::GetMC()->TrackMomentum(mom);
2347 Float_t ptot=mom.Rho();
2348 Float_t betaGamma = ptot/TVirtualMC::GetMC()->TrackMass();
2350 //Int_t pid=TVirtualMC::GetMC()->TrackPid();
2351 // if((pid==kElectron || pid==kPositron) && ptot > 0.002)
2353 // pp = prim*1.58; // electrons above 20 MeV/c are on the plateau!
2358 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
2359 TVectorD *bbpar = fTPCParam->GetBetheBlochParameters(); //get parametrization from OCDB
2360 pp=prim*AliMathBase::BetheBlochAleph(betaGamma,(*bbpar)(0),(*bbpar)(1),(*bbpar)(2),(*bbpar)(3),(*bbpar)(4));
2363 Double_t rnd = TVirtualMC::GetMC()->GetRandom()->Rndm();
2365 TVirtualMC::GetMC()->SetMaxStep(-TMath::Log(rnd)/pp);