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"
49 #include "TGeoCompositeShape.h"
51 #include "TGeoPhysicalNode.h"
52 #include "TGeoHalfSpace.h"
53 #include "TTreeStream.h"
57 //_____________________________________________________________________________
58 AliTPCv2::AliTPCv2(const char *name, const char *title) :
65 // Standard constructor for Time Projection Chamber version 2
69 SetBufferSize(128000);
73 // fTPCParam->Write(fTPCParam->GetTitle());
76 //_____________________________________________________________________________
77 void AliTPCv2::CreateGeometry()
80 // Create the geometry of Time Projection Chamber version 2
84 <img src="picts/AliTPC.gif">
89 <img src="picts/AliTPCv2Tree.gif">
93 //----------------------------------------------------------
94 // This geometry is written using TGeo class
95 // Firstly the shapes are defined, and only then the volumes
96 // What is recognized by the MC are volumes
97 //----------------------------------------------------------
99 // tpc - this will be the mother volume
103 // here I define a volume TPC
104 // retrive the medium name with "TPC_" as a leading string
106 TGeoPcon *tpc = new TGeoPcon(0.,360.,28); //28 sections
108 tpc->DefineSection(0,-291.,77.,278.);
109 tpc->DefineSection(1,-270,77.,278.);
111 tpc->DefineSection(2,-270.,77.,278.);
112 tpc->DefineSection(3,-262.1,77.,278.);
114 tpc->DefineSection(4,-262.1,83.1,278.);
115 tpc->DefineSection(5,-260.,83.1,278.);
117 tpc->DefineSection(6,-260.,70.,278.);
118 tpc->DefineSection(7,-259.6,70.,278.);
120 tpc->DefineSection(8,-259.6,68.1,278.);
121 tpc->DefineSection(9,-253.6,68.1,278.);
123 tpc->DefineSection(10,-253.6,68.,278.);
124 tpc->DefineSection(11,-74.0,60.8,278.);
126 tpc->DefineSection(12,-74.0,60.1,278.);
127 tpc->DefineSection(13,-73.3,60.1,278.);
129 tpc->DefineSection(14,-73.3,56.9,278.);
130 tpc->DefineSection(15,-68.5,56.9,278.);
132 tpc->DefineSection(16,-68.5,60.,278.);
133 tpc->DefineSection(17,-65.,60.,278.);
135 tpc->DefineSection(18,-65.,56.9,278.);
136 tpc->DefineSection(19,73.3,56.9,278.);
138 tpc->DefineSection(20,73.3,60.1,278.);
139 tpc->DefineSection(21,74.0,60.1,278.);
141 tpc->DefineSection(22,74.0,60.8,278.);
142 tpc->DefineSection(23,253.6,65.5,278.);
144 tpc->DefineSection(24,253.6,65.6,278.);
145 tpc->DefineSection(25,259.6,65.6,278.);
147 tpc->DefineSection(26,259.6,70.0,278.);
148 tpc->DefineSection(27,291.,77.,278.);
150 TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
151 TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
153 // drift volume - sensitive volume, extended beyond the
154 // endcaps, because of the alignment
156 TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
157 dvol->DefineSection(0,-260.,74.5,264.4);
158 dvol->DefineSection(1,-253.6,74.5,264.4);
160 dvol->DefineSection(2,-253.6,76.6774,258.);
161 dvol->DefineSection(3,253.6,76.6774,258.);
163 dvol->DefineSection(4,253.6,74.5,264.4);
164 dvol->DefineSection(5,260.,74.5,264.4);
166 TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-2");
167 TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
173 TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
175 tpco->DefineSection(0,-256.6,264.8,278.);
176 tpco->DefineSection(1,-253.6,264.8,278.);
178 tpco->DefineSection(2,-253.6,258.,278.);
179 tpco->DefineSection(3,250.6,258.,278.);
181 tpco->DefineSection(4,250.6,258.,275.5);
182 tpco->DefineSection(5,253.6,258.,275.5);
184 TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
185 TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
187 TGeoRotation *segrot;//segment rotations
189 // outer containment vessel
191 TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel
193 tocv->DefineSection(0,-256.6,264.8,278.);
194 tocv->DefineSection(1,-253.6,264.8,278.);
196 tocv->DefineSection(2,-253.6,274.8124,278.);
197 tocv->DefineSection(3,247.6,274.8124,278.);
199 tocv->DefineSection(4,247.6,270.4,278.);
200 tocv->DefineSection(5,250.6,270.4,278.);
202 TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
203 TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
205 TGeoTubeSeg *to1 = new TGeoTubeSeg(274.8174,277.995,252.1,0.,59.9); //epoxy
206 TGeoTubeSeg *to2 = new TGeoTubeSeg(274.8274,277.985,252.1,0.,59.9); //tedlar
207 TGeoTubeSeg *to3 = new TGeoTubeSeg(274.8312,277.9812,252.1,0.,59.9);//prepreg2
208 TGeoTubeSeg *to4 = new TGeoTubeSeg(274.9062,277.9062,252.1,0.,59.9);//nomex
209 TGeoTubeSeg *tog5 = new TGeoTubeSeg(274.8174,277.995,252.1,59.9,60.);//epoxy
211 TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
212 TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
213 TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
214 TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
216 TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
217 TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
218 TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
219 TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
220 TGeoVolume *togv5 = new TGeoVolume("TPC_OCVG5",tog5,sm1);
221 //-------------------------------------------------------
222 // Tpc Outer Field Cage
223 // daughters - composite (sandwich)
224 //-------------------------------------------------------
226 TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
228 tofc->DefineSection(0,-253.6,258.,269.6);
229 tofc->DefineSection(1,-250.6,258.,269.6);
231 tofc->DefineSection(2,-250.6,258.,260.0676);
232 tofc->DefineSection(3,250.6,258.,260.0676);
234 tofc->DefineSection(4,250.6,258.,275.5);
235 tofc->DefineSection(5,253.6,258.,275.5);
237 TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
239 TGeoTubeSeg *tf1 = new TGeoTubeSeg(258.0,260.0676,252.1,0.,59.9); //tedlar
240 TGeoTubeSeg *tf2 = new TGeoTubeSeg(258.0038,260.0638,252.1,0.,59.9); //prepreg3
241 TGeoTubeSeg *tf3 = new TGeoTubeSeg(258.0338,260.0338,252.1,0.,59.9);//nomex
242 TGeoTubeSeg *tfg4 = new TGeoTubeSeg(258.0,260.0676,252.1,59.9,60.); //epoxy glue
244 TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
246 TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
247 TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
248 TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
249 TGeoVolume *tfg4v = new TGeoVolume("TPC_OFCG4",tfg4,sm1);
251 // outer part - positioning
253 tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);//ocv
255 tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);//ofc
257 TGeoVolumeAssembly *t200 = new TGeoVolumeAssembly("TPC_OCVSEG");
258 TGeoVolumeAssembly *t300 = new TGeoVolumeAssembly("TPC_OFCSEG");
260 // assembly OCV and OFC
263 t200->AddNode(tov1,1); t200->AddNode(togv5,1);
264 t300->AddNode(tf1v,1); t300->AddNode(tfg4v,1);
265 // 2nd - rotation 60 deg
266 segrot = new TGeoRotation();
267 segrot->RotateZ(60.);
268 t200->AddNode(tov1,2,segrot); t200->AddNode(togv5,2,segrot);
269 t300->AddNode(tf1v,2,segrot); t300->AddNode(tfg4v,2,segrot);
270 // 3rd rotation 120 deg
271 segrot = new TGeoRotation();
272 segrot->RotateZ(120.);
273 t200->AddNode(tov1,3,segrot); t200->AddNode(togv5,3,segrot);
274 t300->AddNode(tf1v,3,segrot); t300->AddNode(tfg4v,3,segrot);
275 //4th rotation 180 deg
276 segrot = new TGeoRotation();
277 segrot->RotateZ(180.);
278 t200->AddNode(tov1,4,segrot); t200->AddNode(togv5,4,segrot);
279 t300->AddNode(tf1v,4,segrot); t300->AddNode(tfg4v,4,segrot);
280 //5th rotation 240 deg
281 segrot = new TGeoRotation();
282 segrot->RotateZ(240.);
283 t200->AddNode(tov1,5,segrot); t200->AddNode(togv5,5,segrot);
284 t300->AddNode(tf1v,5,segrot); t300->AddNode(tfg4v,5,segrot);
285 //6th rotation 300 deg
286 segrot = new TGeoRotation();
287 segrot->RotateZ(300.);
288 t200->AddNode(tov1,6,segrot); t200->AddNode(togv5,6,segrot);
289 t300->AddNode(tf1v,6,segrot); t300->AddNode(tfg4v,6,segrot);
291 v3->AddNode(t200,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(t300,1);
293 v2->AddNode(v3,1); v2->AddNode(v4,1);
296 //--------------------------------------------------------------------
297 // Tpc Inner INsulator (CO2)
298 // the cones, the central drum and the inner f.c. sandwich with a piece
299 // of the flane will be placed in the TPC
300 //--------------------------------------------------------------------
301 TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
303 tpci->DefineSection(0,-253.6,68.4,76.6774);
304 tpci->DefineSection(1,-74.0,61.2,76.6774);
306 tpci->DefineSection(2,74.0,61.2,76.6774);
308 tpci->DefineSection(3,253.6,65.9,76.6774);
310 TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
312 // now the inner field cage - only part of flanges (2 copies)
314 TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
315 TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
317 //---------------------------------------------------------
318 // Tpc Inner Containment vessel - Muon side
319 //---------------------------------------------------------
320 TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
322 tcms->DefineSection(0,-259.1,68.1,74.2);
323 tcms->DefineSection(1,-253.6,68.1,74.2);
325 tcms->DefineSection(2,-253.6,68.1,68.4);
326 tcms->DefineSection(3,-74.0,60.9,61.2);
328 tcms->DefineSection(4,-74.0,60.1,61.2);
329 tcms->DefineSection(5,-73.3,60.1,61.2);
331 tcms->DefineSection(6,-73.3,56.9,61.2);
332 tcms->DefineSection(7,-73.0,56.9,61.2);
334 tcms->DefineSection(8,-73.0,56.9,58.8);
335 tcms->DefineSection(9,-71.3,56.9,58.8);
337 TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
338 //-----------------------------------------------
339 // inner containment vessel - shaft side
340 //-----------------------------------------------
341 TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
343 tcss->DefineSection(0,71.3,56.9,58.8);
344 tcss->DefineSection(1,73.0,56.9,58.8);
346 tcss->DefineSection(2,73.0,56.9,61.2);
347 tcss->DefineSection(3,73.3,56.9,61.2);
349 tcss->DefineSection(4,73.3,60.1,61.2);
350 tcss->DefineSection(5,74.0,60.1,61.2);
352 tcss->DefineSection(6,74.0,60.9,61.2);
353 tcss->DefineSection(7,253.6,65.6,65.9);
355 tcss->DefineSection(8,253.6,65.6,74.2);
356 tcss->DefineSection(9,258.1,65.6,74.2);
358 TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
359 //-----------------------------------------------
361 // define 4 parts and make an assembly
362 //-----------------------------------------------
363 // part1 - Al - 2 copies
364 TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
365 TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
366 // sandwich - outermost parts - 2 copies
370 TGeoTubeSeg *t2 = new TGeoTubeSeg(76.6774,78.845,74.175,350.,109.4); // tedlar 38 microns
371 TGeoTubeSeg *t3 = new TGeoTubeSeg(76.6812,78.8412,74.175,350.,109.4); // prepreg2 500 microns
372 TGeoTubeSeg *t4 = new TGeoTubeSeg(76.7312,78.7912,74.175,350.,109.4); // prepreg3 300 microns
373 TGeoTubeSeg *t5 = new TGeoTubeSeg(76.7612,78.7612,74.175,350.,109.4); // nomex 2 cm
374 TGeoTubeSeg *tepox1 = new TGeoTubeSeg(76.6774,78.845,74.175,109.4,110.);//epoxy
375 TGeoTubeSeg *tpr1 = new TGeoTubeSeg(78.845,78.885,74.175,109.,111.);
377 // volumes for the outer part
378 TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
379 TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
380 TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
381 TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
382 TGeoVolume *tvep1 = new TGeoVolume("TPC_IFEPOX1",tepox1,sm1);
383 TGeoVolume *tvpr1 = new TGeoVolume("TPC_PRSTR1",tpr1,sm2);
385 // middle parts - 2 copies
389 TGeoTubeSeg *t6 = new TGeoTubeSeg(76.6774,78.795,5.,350.,109.4); // tedlar 38 microns
390 TGeoTubeSeg *t7 = new TGeoTubeSeg(76.6812,78.7912,5.,350.,109.4); // prepreg2 250 microns
391 TGeoTubeSeg *t8 = new TGeoTubeSeg(76.7062,78.7662,5.,350.,109.4); // prepreg3 300 microns
392 TGeoTubeSeg *t9 = new TGeoTubeSeg(76.7362,78.7362,5.,350.,109.4); // nomex 2 cm
393 TGeoTubeSeg *tepox2 = new TGeoTubeSeg(76.6774,78.795,5.,109.4,110.);//epoxy
394 TGeoTubeSeg *tpr2 = new TGeoTubeSeg(78.795,78.835,5.,109.,111.);
395 // volumes for the middle part
396 TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
397 TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
398 TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
399 TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
400 TGeoVolume *tvep2 = new TGeoVolume("TPC_IFEPOX2",tepox2,sm1);
401 TGeoVolume *tvpr2 = new TGeoVolume("TPC_PRSTR2",tpr2,sm2);
402 // central part - 1 copy
404 // segment central part
406 TGeoTubeSeg *t10 = new TGeoTubeSeg(76.6774,78.785,93.75,350.,109.4); // tedlar 38 microns
407 TGeoTubeSeg *t11 = new TGeoTubeSeg(76.6812,78.7812,93.75,350.,109.4); // prepreg3 500 microns
408 TGeoTubeSeg *t12 = new TGeoTubeSeg(76.7312,78.7312,93.75,350.,109.4); // nomex 2 cm
409 TGeoTubeSeg *tepox3 = new TGeoTubeSeg(76.6774,78.785,93.75,109.4,110.);//epoxy
410 TGeoTubeSeg *tpr3 = new TGeoTubeSeg(78.785,78.825,93.75,109.,111.);
411 // volumes for the central part
412 TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
413 TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
414 TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
415 TGeoVolume *tvep3 = new TGeoVolume("TPC_IFEPOX3",tepox3,sm1);
416 TGeoVolume *tvpr3 = new TGeoVolume("TPC_PRSTR3",tpr3,sm2);
418 // creating a sandwich for the outer par,t tv2 is the mother
420 tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
422 // creating a sandwich for the middle part, tv6 is the mother
424 tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
426 // creating a sandwich for the central part, tv10 is the mother
428 tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
430 TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC"); // ifc itself - 3 segments
433 // first segment - no rotation
436 tv100->AddNode(tv10,1); //sandwich
437 tv100->AddNode(tvep3,1);//epoxy
438 tv100->AddNode(tvpr3,1);//prepreg strip
440 tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75)); //sandwich1
441 tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75)); // sandwich2
442 tv100->AddNode(tvep2,1,new TGeoTranslation(0.,0.,-98.75)); //epoxy
443 tv100->AddNode(tvep2,2,new TGeoTranslation(0.,0.,98.75)); //epoxy
444 tv100->AddNode(tvpr2,1,new TGeoTranslation(0.,0.,-98.75));//prepreg strip
445 tv100->AddNode(tvpr2,2,new TGeoTranslation(0.,0.,98.75));
447 tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925)); //sandwich
448 tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
449 tv100->AddNode(tvep1,1,new TGeoTranslation(0.,0.,-177.925)); //epoxy
450 tv100->AddNode(tvep1,2,new TGeoTranslation(0.,0.,177.925));
451 tv100->AddNode(tvpr1,1,new TGeoTranslation(0.,0.,-177.925));//prepreg strip
452 tv100->AddNode(tvpr1,2,new TGeoTranslation(0.,0.,-177.925));
454 // second segment - rotation 120 deg.
456 segrot = new TGeoRotation();
457 segrot->RotateZ(120.);
460 tv100->AddNode(tv10,2,segrot); //sandwich
461 tv100->AddNode(tvep3,2,segrot);//epoxy
462 tv100->AddNode(tvpr3,2,segrot);//prepreg strip
464 tv100->AddNode(tv6,3,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //sandwich1
465 tv100->AddNode(tv6,4,new TGeoCombiTrans(0.,0.,98.75,segrot)); // sandwich2
466 tv100->AddNode(tvep2,3,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //epoxy
467 tv100->AddNode(tvep2,4,new TGeoCombiTrans(0.,0.,98.75,segrot)); //epoxy
468 tv100->AddNode(tvpr2,3,new TGeoCombiTrans(0.,0.,-98.75,segrot));//prepreg strip
469 tv100->AddNode(tvpr2,4,new TGeoCombiTrans(0.,0.,98.75,segrot));
471 tv100->AddNode(tv2,3,new TGeoCombiTrans(0.,0.,-177.925,segrot));//sandwich
472 tv100->AddNode(tv2,4,new TGeoCombiTrans(0.,0.,177.925,segrot));
473 tv100->AddNode(tvep1,3,new TGeoCombiTrans(0.,0.,-177.925,segrot));//epoxy
474 tv100->AddNode(tvep1,4,new TGeoCombiTrans(0.,0.,177.925,segrot));
475 tv100->AddNode(tvpr1,3,new TGeoCombiTrans(0.,0.,-177.925,segrot));//prepreg strip
476 tv100->AddNode(tvpr1,4,new TGeoCombiTrans(0.,0.,177.925,segrot));
478 // third segment - rotation 240 deg.
480 segrot = new TGeoRotation();
481 segrot->RotateZ(240.);
484 tv100->AddNode(tv10,3,segrot); //sandwich
485 tv100->AddNode(tvep3,3,segrot);//epoxy
486 tv100->AddNode(tvpr3,3,segrot);//prepreg strip
488 tv100->AddNode(tv6,5,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //sandwich1
489 tv100->AddNode(tv6,6,new TGeoCombiTrans(0.,0.,98.75,segrot)); // sandwich2
490 tv100->AddNode(tvep2,5,new TGeoCombiTrans(0.,0.,-98.75,segrot)); //epoxy
491 tv100->AddNode(tvep2,6,new TGeoCombiTrans(0.,0.,98.75,segrot)); //epoxy
492 tv100->AddNode(tvpr2,5,new TGeoCombiTrans(0.,0.,-98.75,segrot));//prepreg strip
493 tv100->AddNode(tvpr2,6,new TGeoCombiTrans(0.,0.,98.75,segrot));
495 tv100->AddNode(tv2,5,new TGeoCombiTrans(0.,0.,-177.925,segrot));//sandwich
496 tv100->AddNode(tv2,6,new TGeoCombiTrans(0.,0.,177.925,segrot));
497 tv100->AddNode(tvep1,5,new TGeoCombiTrans(0.,0.,-177.925,segrot));//epoxy
498 tv100->AddNode(tvep1,6,new TGeoCombiTrans(0.,0.,177.925,segrot));
499 tv100->AddNode(tvpr1,5,new TGeoCombiTrans(0.,0.,-177.925,segrot));//prepreg strip
500 tv100->AddNode(tvpr1,6,new TGeoCombiTrans(0.,0.,177.925,segrot));
502 tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
503 tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
505 v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
506 v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
507 v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
508 v9->AddNode(tv100,1);
514 TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
515 cfl->DefineSection(0,-71.1,59.7,61.2);
516 cfl->DefineSection(1,-68.6,59.7,61.2);
518 cfl->DefineSection(2,-68.6,60.6124,61.2);
519 cfl->DefineSection(3,68.6,60.6124,61.2);
521 cfl->DefineSection(4,68.6,59.7,61.2);
522 cfl->DefineSection(5,71.1,59.7,61.2);
524 TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
526 TGeoTubeSeg *cd1 = new TGeoTubeSeg(60.6224,61.19,71.1,0.1,119.9);
527 TGeoTubeSeg *cd2 = new TGeoTubeSeg(60.6262,61.1862,71.1,0.1,119.9);
528 TGeoTubeSeg *cd3 = new TGeoTubeSeg(60.6462,61.1662,71.1,0.1,119.9);
529 TGeoTubeSeg *cd4 = new TGeoTubeSeg(60.6562,61.1562,71.1,0.1,119.9);
530 TGeoTubeSeg *tepox4 = new TGeoTubeSeg(60.6224,61.19,71.1,359.9,0.1);
531 // TGeoTube *cd1 = new TGeoTube(60.6224,61.19,71.1);
532 // TGeoTube *cd2 = new TGeoTube(60.6262,61.1862,71.1);
533 // TGeoTube *cd3 = new TGeoTube(60.6462,61.1662,71.1);
534 // TGeoTube *cd4 = new TGeoTube(60.6562,61.1562,71.1);
536 TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
537 TGeoMedium *sm8 = gGeoManager->GetMedium("TPC_Epoxyfm");
538 TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
539 TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
540 TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm8); //epoxy film
541 TGeoVolume *cd4v = new TGeoVolume("TPC_CDR4",cd4,sm4); //nomex
542 TGeoVolume *tvep4 = new TGeoVolume("TPC_IFEPOX4",tepox4,sm1);
545 // seals for central drum 2 copies
547 TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
548 TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
549 TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
550 v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
551 v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
554 TGeoPcon *se = new TGeoPcon(0.,360.,6);
555 se->DefineSection(0,-72.8,59.7,61.2);
556 se->DefineSection(1,-72.3,59.7,61.2);
558 se->DefineSection(2,-72.3,58.85,61.2);
559 se->DefineSection(3,-71.6,58.85,61.2);
561 se->DefineSection(4,-71.6,59.7,61.2);
562 se->DefineSection(5,-71.3,59.7,61.2);
564 TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
566 TGeoTube *si = new TGeoTube(56.9,58.8,1.);
567 TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
569 // define reflection matrix
571 TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
573 cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cd3v->AddNode(cd4v,1); //sandwich
575 cflv->AddNode(cd1v,1); cflv->AddNode(tvep4,1);
577 segrot = new TGeoRotation();
578 segrot->RotateZ(120.);
579 cflv->AddNode(cd1v,2,segrot); cflv->AddNode(tvep4,2,segrot);
581 segrot = new TGeoRotation();
582 segrot->RotateZ(240.);
583 cflv->AddNode(cd1v,3,segrot); cflv->AddNode(tvep4,3,segrot);
585 v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
586 v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
587 v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
589 // central membrane - 2 rings and a mylar membrane - assembly
591 TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
592 TGeoTube *oh = new TGeoTube(250.,256.,0.5);
593 TGeoTube *mem = new TGeoTube(84.05,250.,0.00115);
596 TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
598 TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
599 TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
601 TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
603 TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
610 // end caps - they are make as an assembly of single segments
611 // containing both readout chambers
613 Double_t openingAngle = 10.*TMath::DegToRad();
614 Double_t thick=1.5; // rib
615 Double_t shift = thick/TMath::Sin(openingAngle);
617 Double_t lowEdge = 86.3; // hole in the wheel
618 Double_t upEdge = 240.4; // hole in the wheel
620 new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
622 TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
624 hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
625 hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
627 hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
628 hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
630 Double_t ys = shift*TMath::Sin(openingAngle);
631 Double_t xs = shift*TMath::Cos(openingAngle);
632 TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
633 tr->RegisterYourself();
634 TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
635 TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
636 TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
637 bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
638 bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
639 TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
640 TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
642 ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
648 TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
649 TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
651 TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
652 TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
653 ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
655 Double_t tga = (19.8328-12.3742)/39.3;
657 xmin = 9.55*tga+12.3742;
658 xmax = 9.95*tga+12.3742;
659 TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
660 TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
661 empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
662 xmin=19.4*tga+12.3742;
663 xmax=19.9*tga+12.3742;
664 TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
665 TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
666 empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
667 xmin=29.35*tga+12.3742;
668 xmax=29.75*tga+12.3742;
669 TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
670 TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
671 empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
673 // holes for connectors
675 TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
676 TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
677 TString fileName(gSystem->Getenv("ALICE_ROOT"));
678 fileName += "/TPC/conn_iroc.dat";
680 in.open(fileName.Data(), ios_base::in); // asci file
681 TGeoRotation *rrr[86];
682 for(Int_t i =0;i<86;i++){
687 rrr[i]= new TGeoRotation();
688 rrr[i]->RotateY(ang);
689 ibdv->AddNode(connv,i+1,new TGeoCombiTrans(x,y,z,rrr[i]));
693 new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
695 new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
696 TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
697 tr1->RegisterYourself();
698 TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
699 TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
701 // pad plane and wire fixations
703 TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
704 TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
705 TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
706 TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
707 TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
708 TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
710 TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
712 iroc->AddNode(ibdv,1);
713 iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
714 iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
715 tga =(23.3521-14.5974)/49.65;
716 Double_t xx = 24.825*tga+14.5974-0.6;
717 iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
718 iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
722 TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
723 TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
724 TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
725 TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
726 obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
728 tga=(38.5084-20.2938)/99.3;
729 xmin=tga*10.2+20.2938;
730 xmax=tga*10.6+20.2938;
731 TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
732 TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
734 xmin=22.55*tga+20.2938;
735 xmax=24.15*tga+20.2938;
736 TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
737 TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
739 xmin=36.1*tga+20.2938;
740 xmax=36.5*tga+20.2938;
741 TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
742 TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
744 xmin=49.0*tga+20.2938;
745 xmax=50.6*tga+20.2938;
746 TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
747 TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
749 xmin=63.6*tga+20.2938;
750 xmax=64.0*tga+20.2938;
751 TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
752 TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
754 xmin=75.5*tga+20.2938;
755 xmax=77.15*tga+20.2938;
756 TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
757 TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
759 xmin=88.7*tga+20.2938;
760 xmax=89.1*tga+20.2938;
761 TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
762 TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
764 oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
765 oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
766 oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
767 oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
768 oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
769 oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
770 oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
772 TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
773 TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
774 TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
775 TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
776 TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
778 TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
779 TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
780 TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
781 TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
782 TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
784 oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
785 oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
786 oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
787 oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
788 oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
789 oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
790 oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
791 oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
793 // holes for connectors
795 fileName = gSystem->Getenv("ALICE_ROOT");
796 fileName += "/TPC/conn_oroc.dat";
797 in.open(fileName.Data(), ios_base::in); // asci file
798 TGeoRotation *rr[78];
799 for(Int_t i =0;i<78;i++){
802 Double_t x1,z1,x2,z2;
804 Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
805 Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
807 x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
809 rr[i]= new TGeoRotation();
814 obdv->AddNode(connv,i+1,new TGeoCombiTrans(x1,y,z1,rr[i]));
815 obdv->AddNode(connv,i+79,new TGeoCombiTrans(x2,y,z2,rr[i]));
819 new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
820 new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
821 TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
822 tr5->RegisterYourself();
823 TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
824 TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
826 // pad plane and wire fixations
828 TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
829 TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
831 tga=(43.5239-23.3874)/114.2;
832 TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
833 TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
834 xx = 57.1*tga+23.3874-0.7;
835 TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
836 TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
838 TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
840 oroc->AddNode(obdv,1);
841 oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
842 oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
843 oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
844 oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
846 // now iroc and oroc are placed into a sector...
848 TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
849 TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
850 TGeoRotation rot1("rot1",90.,90.,0.);
851 TGeoRotation rot2("rot2");
853 TGeoRotation *rot = new TGeoRotation("rot");
857 x0=110.2*TMath::Cos(openingAngle);
858 y0=110.2*TMath::Sin(openingAngle);
859 TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
860 TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
861 x0=188.45*TMath::Cos(openingAngle);
862 y0=188.45*TMath::Sin(openingAngle);
863 TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
864 TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
869 secta->AddNode(ch,1);
870 secta->AddNode(iroc,1,combi1a);
871 secta->AddNode(oroc,1,combi2a);
875 sectc->AddNode(ch,1);
876 sectc->AddNode(iroc,1,combi1c);
877 sectc->AddNode(oroc,1,combi2c);
879 // now I try to make wheels...
881 TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
882 TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
884 TGeoRotation *rwh[18];
885 for(Int_t i =0;i<18;i++){
886 Double_t phi = (20.*i);
887 rwh[i]=new TGeoRotation();
888 rwh[i]->RotateZ(phi);
889 wheela->AddNode(secta,i+1,rwh[i]);
890 wheelc->AddNode(sectc,i+1,rwh[i]);
893 // wheels in the drift volume!
895 TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
896 v9->AddNode(wheela,1,combi3);
897 v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
898 //_____________________________________________________________
899 // service support wheel
900 //_____________________________________________________________
901 TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
902 sw->DefineSection(0,-4.,80.5,251.75);
903 sw->DefineSection(1,4.,80.5,251.75);
904 TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
907 shift = thick/TMath::Sin(openingAngle);
908 TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
909 sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
910 sh->DefineSection(1,4.,81.5-shift,250.75-shift);
911 TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
913 TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si");
914 TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
915 el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
916 el->DefineSection(1,1.872,81.5-shift,250.75-shift);
917 TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
922 ys = shift*TMath::Sin(openingAngle);
923 xs = shift*TMath::Cos(openingAngle);
924 swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
926 TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
927 co->DefineSection(0,-0.5,77.,255.25);
928 co->DefineSection(1,0.5,77.,255.25);
929 TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
931 TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
932 shift=4./TMath::Sin(openingAngle);
933 coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
934 coh->DefineSection(1,0.5,85.-shift,247.25-shift);
936 TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
938 ys = shift*TMath::Sin(openingAngle);
939 xs = shift*TMath::Cos(openingAngle);
940 cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
942 // Sector as an Assembly
944 TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
945 swhs->AddNode(swv,1);
946 swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
947 swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
949 // SSW as an Assembly of sectors
951 TGeoRotation *rsw[18];
952 TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
953 for(Int_t i =0;i<18;i++){
954 Double_t phi = (20.*i);
955 rsw[i] = new TGeoRotation();
956 rsw[i]->RotateZ(phi);
957 swheel->AddNode(swhs,i+1,rsw[i]);
959 v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
960 v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
962 // sensitive strips - strip "0" is always set
965 totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
968 gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
969 upar=new Double_t [10];
978 Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
985 gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
986 gGeoManager->Node("TPC_Strip",totrows+1,
987 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
989 // now, strips optionally
993 for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
994 rlow=fTPCParam->GetPadRowRadiiLow(i-1);
999 gGeoManager->Node("TPC_Strip",i,
1000 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
1001 gGeoManager->Node("TPC_Strip",totrows+i,
1002 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
1005 for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
1006 rlow=fTPCParam->GetPadRowRadiiUp(i-1);
1011 gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
1012 "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
1013 gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
1014 "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
1017 //----------------------------------------------------------
1018 // TPC Support Rods - MAKROLON
1019 //----------------------------------------------------------
1020 TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
1021 TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
1022 TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
1023 TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");
1024 TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
1025 TGeoMedium *m13 = gGeoManager->GetMedium("TPC_Brass");
1027 // tpc rod is an assembly of 10 long parts and 2 short parts
1028 // connected with alu rings and plagged on both sides.
1033 TGeoPcon *rod = new TGeoPcon("rod",0.,360.,6);
1034 rod->DefineSection(0,-10.43,1.92,2.08);
1035 rod->DefineSection(1,-9.75,1.92,2.08);
1037 rod->DefineSection(2,-9.75,1.8,2.2);
1038 rod->DefineSection(3,9.75,1.8,2.2);
1040 rod->DefineSection(4,9.75,1.92,2.08);
1041 rod->DefineSection(5,10.43,1.92,2.08);
1043 TGeoVolume *mrodl = new TGeoVolume("TPC_mrodl",rod,m6);
1047 TGeoPcon *rod1 = new TGeoPcon("rod1",0.,360.,6);
1048 rod1->DefineSection(0,-8.93,1.92,2.08);
1049 rod1->DefineSection(1,-8.25,1.92,2.08);
1051 rod1->DefineSection(2,-8.25,1.8,2.2);
1052 rod1->DefineSection(3,8.25,1.8,2.2);
1054 rod1->DefineSection(4,8.25,1.92,2.08);
1055 rod1->DefineSection(5,8.93,1.92,2.08);
1057 TGeoVolume *mrods = new TGeoVolume("TPC_mrods",rod1,m6);
1059 // below is for the resistor rod
1061 // hole for the brass connectors
1064 new TGeoTube("hhole",0.,0.3,0.3);
1066 //transformations for holes - initialy they
1067 // are placed at x=0 and negative y
1069 TGeoRotation *rhole = new TGeoRotation();
1070 rhole->RotateX(90.);
1071 TGeoCombiTrans *transf[13];
1073 for(Int_t i=0;i<13;i++){
1074 //sprintf(name,"transf%d",i);
1075 snprintf(name,30,"transf%d",i);
1076 transf[i]= new TGeoCombiTrans(name,0.,-2.,-9.+i*1.5,rhole);
1077 transf[i]->RegisterYourself();
1079 // union expression for holes
1080 TString operl("hhole:transf0");
1081 for (Int_t i=1;i<13;i++){
1082 //sprintf(name,"+hhole:transf%d",i);
1083 snprintf(name,30,"+hhole:transf%d",i);
1087 TString opers("hhole:transf1");
1088 for (Int_t i=2;i<12;i++){
1089 //sprintf(name,"+hhole:transf%d",i);
1090 snprintf(name,30,"+hhole:transf%d",i);
1094 new TGeoCompositeShape("hlv",operl.Data());
1095 new TGeoCompositeShape("hsv",opers.Data());
1097 TGeoCompositeShape *rodl = new TGeoCompositeShape("rodl","rod-hlv");
1098 TGeoCompositeShape *rods = new TGeoCompositeShape("rods","rod1-hsv");
1099 //rods - volumes - makrolon rods with holes
1100 TGeoVolume *rodlv = new TGeoVolume("TPC_rodl",rodl,m6);
1101 TGeoVolume *rodsv = new TGeoVolume("TPC_rods",rods,m6);
1104 TGeoTube *bcon = new TGeoTube(0.,0.3,0.3);//connectors
1105 TGeoVolume *bconv = new TGeoVolume("TPC_bcon",bcon,m13);
1107 // hooks holding strips
1109 new TGeoBBox("hk1",0.625,0.015,0.75);
1110 new TGeoBBox("hk2",0.625,0.015,0.15);
1111 TGeoTranslation *tr21 = new TGeoTranslation("tr21",0.,-0.03,-0.6);
1112 TGeoTranslation *tr12 = new TGeoTranslation("tr12",0.,-0.03,0.6);
1113 tr21->RegisterYourself();
1114 tr12->RegisterYourself();
1116 TGeoCompositeShape *hook = new TGeoCompositeShape("hook","hk1+hk2:tr21+hk2:tr12");
1117 TGeoVolume *hookv = new TGeoVolume("TPC_hook",hook,m13);
1119 // assembly of the short rod with connectors and hooks
1124 TGeoVolumeAssembly *spart = new TGeoVolumeAssembly("TPC_spart");
1126 spart->AddNode( rodsv,1);
1127 for(Int_t i=1;i<12;i++){
1128 spart->AddNode(bconv,i,transf[i]);
1130 for(Int_t i =0;i<11;i++){
1131 spart->AddNode(hookv,i+1,new TGeoTranslation(0.,-2.315,-7.5+i*1.5));
1136 TGeoVolumeAssembly *lpart = new TGeoVolumeAssembly("TPC_lpart");
1138 lpart->AddNode( rodlv,1);
1139 for(Int_t i=0;i<13;i++){
1140 lpart->AddNode(bconv,i+12,transf[i]);
1142 for(Int_t i =0;i<13;i++){
1143 lpart->AddNode(hookv,i+12,new TGeoTranslation(0.,-2.315,-9.+i*1.5));
1148 new TGeoTube("ring1",2.1075,2.235,0.53);
1149 new TGeoTube("ring2",1.7925,1.89,0.43);
1150 new TGeoTube("ring3",1.89,2.1075,0.05);
1151 TGeoCompositeShape *ring = new TGeoCompositeShape("ring","ring1+ring2+ring3");
1152 TGeoVolume *ringv = new TGeoVolume("TPC_ring",ring,m3);
1156 TGeoVolumeAssembly *tpcrrod = new TGeoVolumeAssembly("TPC_rrod");//rrod
1157 TGeoVolumeAssembly *tpcmrod = new TGeoVolumeAssembly("TPC_mrod");//makrolon rod
1159 for(Int_t i=0;i<11;i++){
1160 tpcrrod->AddNode(ringv,i+1,new TGeoTranslation(0.,0.,-105.+i*21));
1161 tpcmrod->AddNode(ringv,i+12,new TGeoTranslation(0.,0.,-105.+i*21));
1163 for(Int_t i=0;i<10;i++){
1164 tpcrrod->AddNode(lpart,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));
1165 tpcmrod->AddNode(mrodl,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));
1170 tpcrrod->AddNode(spart,1,new TGeoTranslation(0.,0.,-114.));
1171 tpcrrod->AddNode(spart,2,new TGeoTranslation(0.,0.,114.));
1172 tpcrrod->AddNode(ringv,23,new TGeoTranslation(0.,0.,-123.));
1173 tpcrrod->AddNode(ringv,24,new TGeoTranslation(0.,0.,123.));
1175 tpcmrod->AddNode(mrods,1,new TGeoTranslation(0.,0.,-114.));
1176 tpcmrod->AddNode(mrods,2,new TGeoTranslation(0.,0.,114.));
1177 tpcmrod->AddNode(ringv,25,new TGeoTranslation(0.,0.,-123.));
1178 tpcmrod->AddNode(ringv,26,new TGeoTranslation(0.,0.,123.));
1182 TGeoPcon *lp = new TGeoPcon(0.,360.,4);
1184 lp->DefineSection(0,-125.8,1.92,2.235);
1185 lp->DefineSection(1,-124.8,1.92,2.235);
1187 lp->DefineSection(2,-124.8,1.92,2.08);
1188 lp->DefineSection(3,-123.1,1.92,2.08);
1190 TGeoVolume *lpv1 = new TGeoVolume("TPC_lpv1",lp,m6);
1191 TGeoVolume *lpv2 = new TGeoVolume("TPC_lpv2",lp,m6);
1193 TGeoTube *lr = new TGeoTube(2.1075,2.235,0.5);
1194 TGeoVolume *lrv = new TGeoVolume("TPC_lrv",lr,m3);
1196 lpv2->AddNode(lrv,1,new TGeoTranslation(0.,0.,-125.3));
1198 tpcrrod->AddNode(lpv2,1);
1199 tpcmrod->AddNode(lpv1,1);
1203 TGeoTube *rp = new TGeoTube(1.92,2.08,2.025);
1204 TGeoVolume *rpv = new TGeoVolume("TPC_rpv",rp,m6);
1205 tpcrrod->AddNode(rpv,1, new TGeoTranslation(0.,0.,125.125));
1206 tpcmrod->AddNode(rpv,2,new TGeoTranslation(0.,0.,125.125));
1209 //HV rods - makrolon + 0.58cm (diameter) Cu
1210 TGeoTube *hvr = new TGeoTube(0.,1.465,126.5);
1211 TGeoTube *hvc = new TGeoTube(0.,0.29,126.5);
1213 TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
1214 TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
1215 hvrv->AddNode(hvcv,1);
1219 TGeoTube *cr = new TGeoTube(0.,0.45,126.2);
1220 TGeoTube *cw = new TGeoTube(0.,0.15,126.2);
1221 TGeoVolume *crv = new TGeoVolume("TPC_CR",cr,m10);
1222 TGeoVolume *cwv = new TGeoVolume("TPC_W",cw,m12);
1224 // ceramic rod with water
1226 crv->AddNode(cwv,1);
1230 TGeoTube *pr =new TGeoTube(0.2,0.35,126.2);
1231 TGeoVolume *prv = new TGeoVolume("TPC_PR",pr,m11);
1233 // copper plates with connectors
1235 new TGeoTube("tub",0.,1.7,0.025);
1237 // half space - points on the plane and a normal vector
1240 Double_t slope = TMath::Tan(22.*TMath::DegToRad());
1241 Double_t intp = 1.245;
1243 Double_t b = slope*slope+1.;
1252 norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
1256 new TGeoHalfSpace("sp1",p,n);
1265 norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
1269 new TGeoHalfSpace("sp2",p,n);
1272 new TGeoTube("h1",0.,0.5,0.025);
1273 new TGeoTube("h2",0.,0.35,0.025);
1275 TGeoTranslation *ttr11 = new TGeoTranslation("ttr11",-0.866,0.5,0.);
1276 TGeoTranslation *ttr22 = new TGeoTranslation("ttr22",0.866,0.5,0.);
1277 ttr11->RegisterYourself();
1278 ttr22->RegisterYourself();
1279 // elastic connector
1280 new TGeoBBox("elcon",0.72,0.005,0.3);
1281 TGeoRotation *crr1 = new TGeoRotation();
1282 crr1->RotateZ(-22.);
1283 TGeoCombiTrans *ctr1 = new TGeoCombiTrans("ctr1",-0.36011, -1.09951,-0.325,crr1);
1284 ctr1->RegisterYourself();
1285 TGeoCompositeShape *cs1 = new TGeoCompositeShape("cs1",
1286 "(((((tub-h1:ttr11)-h1:ttr22)-sp1)-sp2)-h2)+elcon:ctr1");
1288 TGeoVolume *csvv = new TGeoVolume("TPC_RR_CU",cs1,m7);
1290 // resistor rod assembly 2 ceramic rods, peak rod, Cu plates
1293 TGeoVolumeAssembly *rrod = new TGeoVolumeAssembly("TPC_RRIN");
1295 rrod->AddNode(crv,1,ttr11);
1296 rrod->AddNode(crv,2,ttr22);
1297 rrod->AddNode(prv,1);
1299 for(Int_t i=0;i<165;i++){
1300 rrod->AddNode(csvv,i+1,new TGeoTranslation(0.,0.,-122.675+i*1.5));
1303 TGeoTube *res = new TGeoTube(0.,0.15,0.5);
1304 TGeoVolume *resv = new TGeoVolume("TPC_RES",res,m10);
1305 TGeoVolumeAssembly *ress = new TGeoVolumeAssembly("TPC_RES_CH");
1306 ress->AddNode(resv,1,new TGeoTranslation(0.2,0.,0.));
1307 ress->AddNode(resv,2,new TGeoTranslation(-0.2,0.,0.));
1309 TGeoRotation *crr2 = new TGeoRotation();
1311 TGeoRotation *crr3 = new TGeoRotation();
1312 crr3->RotateY(-30.);
1314 for(Int_t i=0;i<164;i+=2){
1315 rrod->AddNode(ress,i+1, new TGeoCombiTrans(0.,1.2,-121.925+i*1.5,crr2));
1316 rrod->AddNode(ress,i+2, new TGeoCombiTrans(0.,1.2,-121.925+(i+1)*1.5,crr3));
1319 tpcrrod->AddNode(rrod,1,new TGeoCombiTrans(0.,0.,0.5,crr1));
1321 // guard ring resistor chain
1324 TGeoTube *gres1 = new TGeoTube(0.,0.375,125.);// inside ifc
1326 TGeoVolume *vgres1 = new TGeoVolume("TPC_GRES1",gres1,m10);
1331 xrc=79.3*TMath::Cos(350.*TMath::DegToRad());
1332 yrc=79.3*TMath::Sin(350.*TMath::DegToRad());
1334 v9->AddNode(vgres1,1,new TGeoTranslation(xrc,yrc,126.9));
1335 v9->AddNode(vgres1,2,new TGeoTranslation(xrc,yrc,-126.9));
1337 xrc=79.3*TMath::Cos(190.*TMath::DegToRad());
1338 yrc=79.3*TMath::Sin(190.*TMath::DegToRad());
1340 v9->AddNode(vgres1,3,new TGeoTranslation(xrc,yrc,126.9));
1341 v9->AddNode(vgres1,4,new TGeoTranslation(xrc,yrc,-126.9));
1342 //------------------------------------------------------------------
1343 TGeoRotation refl("refl",90.,0.,90.,90.,180.,0.);
1344 TGeoRotation rotrod("rotrod");
1346 TGeoRotation *rotpos[2];
1348 TGeoRotation *rotrod1[2];
1349 TGeoTubeSeg *irh = new TGeoTubeSeg(78.825,79.25,1.5,358.5,1.5);
1350 TGeoTubeSeg *orh = new TGeoTubeSeg(256.5,257.95,1.5,359.5,0.5);
1351 TGeoTubeSeg *ohh = new TGeoTubeSeg(256.5,257.95,1.5,9.5,10.5);
1352 TGeoVolume *irhv = new TGeoVolume("TPC_IRHH",irh,m4);
1353 TGeoVolume *orhv = new TGeoVolume("TPC_ORHH",orh,m4);
1354 TGeoVolume *ohhv = new TGeoVolume("TPC_OHVHH",ohh,m4);
1358 for(Int_t i=0;i<18;i++){
1361 angle=TMath::DegToRad()*20.*(Double_t)i;
1362 TGeoRotation *roth = new TGeoRotation(); //rotation for rod holders
1363 roth->RotateZ(angle);
1366 x=r * TMath::Cos(angle);
1367 y=r * TMath::Sin(angle);
1370 v9->AddNode(irhv,i+1,roth);
1371 v9->AddNode(orhv,i+1,roth);
1372 v9->AddNode(ohhv,i+1,roth);
1374 if(i==11){//resistor rod inner
1375 rotrod.RotateZ(-90.+angle);
1376 rotrod1[0]= new TGeoRotation();
1377 rotpos[0]= new TGeoRotation();
1379 rotrod1[0]->RotateZ(-90.+angle);
1380 *rotpos[0] = refl*rotrod; //rotation+reflection
1381 v9->AddNode(tpcrrod,1,new TGeoCombiTrans(x,y, z, rotrod1[0])); //A
1382 v9->AddNode(tpcrrod,2,new TGeoCombiTrans(x,y,-z, rotpos[0])); //C
1385 v9->AddNode(tpcmrod,i+1,new TGeoTranslation(x,y,z));//shaft
1386 v9->AddNode(tpcmrod,i+19,new TGeoCombiTrans(x,y,-z,ref));//muon
1390 x=r * TMath::Cos(angle);
1391 y=r * TMath::Sin(angle);
1394 if(i==3){//resistor rod outer
1395 rotrod.RotateZ(90.+angle);
1396 rotrod1[1]= new TGeoRotation();
1397 rotpos[1]= new TGeoRotation();
1398 rotrod1[1]->RotateZ(90.+angle);
1399 *rotpos[1] = refl*rotrod;//rotation+reflection
1400 v9->AddNode(tpcrrod,3,new TGeoCombiTrans(x,y, z, rotrod1[1])); //A
1401 v9->AddNode(tpcrrod,4,new TGeoCombiTrans(x,y, -z, rotpos[1])); //C
1404 v9->AddNode(tpcmrod,i+37,new TGeoTranslation(x,y,z));//shaft
1405 v9->AddNode(tpcmrod,i+55,new TGeoCombiTrans(x,y,-z,ref));//muon
1408 v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z+0.7)); //hv->A-side only
1410 } //end of rods positioning
1412 TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
1413 alice->AddNode(v1,1);
1415 } // end of function
1417 //_____________________________________________________________________________
1418 void AliTPCv2::AddAlignableVolumes() const
1421 // Create entries for alignable volumes associating the symbolic volume
1422 // name with the corresponding volume path. Needs to be syncronized with
1423 // eventual changes in the geometry.
1425 SetInnerChambersAlignable();
1426 SetOuterChambersAlignable();
1429 //_____________________________________________________________________________
1430 void AliTPCv2::SetInnerChambersAlignable() const
1433 AliGeomManager::ELayerID idTPC1 = AliGeomManager::kTPC1;
1434 Int_t modUID, modnum = 0;
1435 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1436 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1437 TString vpappend = "/TPC_IROC_1";
1438 TString snstr1="TPC/EndcapA/Sector";
1439 TString snstr2="TPC/EndcapC/Sector";
1440 TString snappend="/InnerChamber";
1441 TString volpath, symname;
1443 for(Int_t cnt=1; cnt<=18; cnt++){
1444 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
1447 volpath += vpappend;
1450 symname += snappend;
1451 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1452 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1453 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1454 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1455 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
1456 alignableEntry->SetMatrix(matTtoL);
1459 for(Int_t cnt=1; cnt<=18; cnt++){
1460 modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
1463 volpath += vpappend;
1466 symname += snappend;
1467 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1468 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1469 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1470 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1471 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
1472 alignableEntry->SetMatrix(matTtoL);
1476 //_____________________________________________________________________________
1477 void AliTPCv2::SetOuterChambersAlignable() const
1480 AliGeomManager::ELayerID idTPC2 = AliGeomManager::kTPC2;
1481 Int_t modUID, modnum = 0;
1482 TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1483 TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1484 TString vpappend = "/TPC_OROC_1";
1485 TString snstr1="TPC/EndcapA/Sector";
1486 TString snstr2="TPC/EndcapC/Sector";
1487 TString snappend="/OuterChamber";
1488 TString volpath, symname;
1490 for(Int_t cnt=1; cnt<=18; cnt++){
1491 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
1494 volpath += vpappend;
1497 symname += snappend;
1498 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1499 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1500 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1501 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1502 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
1503 alignableEntry->SetMatrix(matTtoL);
1506 for(Int_t cnt=1; cnt<=18; cnt++){
1507 modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
1510 volpath += vpappend;
1513 symname += snappend;
1514 if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1515 AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1516 TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1517 TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1518 TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
1519 alignableEntry->SetMatrix(matTtoL);
1524 //_____________________________________________________________________________
1525 void AliTPCv2::CreateMaterials()
1528 // Define materials for version 2 of the Time Projection Chamber
1531 AliTPC::CreateMaterials();
1534 //_____________________________________________________________________________
1535 void AliTPCv2::Init()
1538 // Initialises version 2 of the TPC after that it has been built
1541 Int_t *idtmed = fIdtmed->GetArray();
1546 fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected...
1548 fIDrift=gMC->VolId("TPC_Drift");
1549 fSecOld=-100; // fake number
1551 gMC->SetMaxNStep(-30000); // max. number of steps increased
1553 if (fPrimaryIonisation) {
1555 gMC->Gstpar(idtmed[2],"PRIMIO_E", 20.77); // 1st ionisation potential
1557 gMC->Gstpar(idtmed[2],"PRIMIO_N", 14.35);
1558 gMC->Gstpar(idtmed[2],"LOSS", 14); // specific energy loss
1559 gMC->Gstpar(idtmed[2],"STRA",4);
1561 // specific energy loss for geant3 is now defined in galice.cuts
1564 AliDebug(1,"*** TPC version 2 initialized ***");
1565 AliDebug(1,Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
1571 //_____________________________________________________________________________
1572 void AliTPCv2::StepManager()
1575 // Called for every step in the Time Projection Chamber
1579 // parameters used for the energy loss calculations
1581 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1582 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1583 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1584 const Int_t kMaxDistRef =15; // maximal difference between 2 stored references
1586 const Float_t kbig = 1.e10;
1593 vol[1]=0; // preset row number to 0
1595 if (!fPrimaryIonisation) gMC->SetMaxStep(kbig);
1597 if(!gMC->IsTrackAlive()) return; // particle has disappeared
1599 Float_t charge = gMC->TrackCharge();
1601 if(TMath::Abs(charge)<=0.) return; // take only charged particles
1603 // check the sensitive volume
1605 id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1606 if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume
1608 gMC->TrackPosition(p);
1609 Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1613 Double_t angle = TMath::ACos(p[0]/r);
1614 angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1616 // angular segment, it is not a real sector number...
1618 Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1619 fTPCParam->GetInnerAngle());
1620 // rotate to segment "0"
1622 fTPCParam->AdjustCosSin(sector,cos,sin);
1623 Float_t x1=p[0]*cos + p[1]*sin;
1624 // check if within sector's limits
1625 if((x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp())
1626 ||(x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp())){
1627 // calculate real sector number...
1628 if (x1>fTPCParam->GetOuterRadiusLow()){
1629 sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1630 fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1631 if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1);
1634 if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1636 // here I have a sector number
1641 static Double_t lastReferenceR=0;
1642 if (TMath::Abs(lastReferenceR-r)>kMaxDistRef){
1643 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
1647 // check if change of sector
1648 if(sector != fSecOld){
1650 // add track reference
1651 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
1653 // track is in the sensitive strip
1655 // track is entering the strip
1656 if (gMC->IsTrackEntering()){
1657 Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1658 vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1659 // row numbers are autonomous for lower and upper sectors
1660 if(vol[0] > fTPCParam->GetNInnerSector()) {
1661 vol[1] -= fTPCParam->GetNRowLow();
1664 if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
1666 // lower sector, row 0, because Jouri wants to have this
1668 gMC->TrackMomentum(p);
1672 hits[3]=0.; // this hit has no energy loss
1673 // Get also the track time for pileup simulation
1674 hits[4]=gMC->TrackTime();
1676 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1680 gMC->TrackPosition(p);
1684 hits[3]=0.; // this hit has no energy loss
1685 // Get also the track time for pileup simulation
1686 hits[4]=gMC->TrackTime();
1688 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1693 //-----------------------------------------------------------------
1694 // charged particle is in the sensitive drift volume
1695 //-----------------------------------------------------------------
1696 if(gMC->TrackStep() > 0) {
1698 if (!fPrimaryIonisation) {
1699 nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1702 Float_t edep = gMC->Edep();
1703 if (edep > 0.) nel = (Int_t)((gMC->Edep()*1.5)/kwIon) + 1;
1705 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1707 gMC->TrackPosition(p);
1711 hits[3]=(Float_t)nel;
1716 gMC->TrackMomentum(p);
1717 Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1718 Float_t precision = (momentum>0.1) ? 0.002 :0.01;
1719 fTrackHits->SetHitPrecision(precision);
1722 // Get also the track time for pileup simulation
1723 hits[4]=gMC->TrackTime();
1725 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1726 if (fDebugStreamer){
1727 // You can dump here what you need
1728 // function CreateDebugStremer() to be called in the Config.C macro
1729 // if you want to enable it
1730 // By default debug streaemer is OFF
1731 Float_t edep = gMC->Edep();
1732 Float_t tstep = gMC->TrackStep();
1733 Int_t pid=gMC->TrackPid();
1734 (*fDebugStreamer)<<"hit"<<
1735 "x="<<hits[0]<< // hit position
1738 "nel="<<hits[3]<< // number of electorns
1739 "tof="<<hits[4]<< // hit TOF
1740 "edep="<<edep<< // energy deposit
1741 "pid="<<pid<< // pid
1748 } //within sector's limits
1749 // Stemax calculation for the next step
1753 // below is valid only for Geant3 (fPromaryIonisation not set)
1754 if(!fPrimaryIonisation){
1755 gMC->TrackMomentum(mom);
1756 Float_t ptot=mom.Rho();
1757 Float_t betaGamma = ptot/gMC->TrackMass();
1759 Int_t pid=gMC->TrackPid();
1760 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1762 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1767 betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
1768 pp=kprim*AliMathBase::BetheBlochAleph(betaGamma);
1772 Double_t rnd = gMC->GetRandom()->Rndm();
1774 gMC->SetMaxStep(-TMath::Log(rnd)/pp);