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4c039060 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
88cb7938 | 16 | /* $Id$ */ |
4c039060 | 17 | |
73042f01 | 18 | // |
fe4da5cc | 19 | /////////////////////////////////////////////////////////////////////////////// |
20 | // // | |
21 | // Time Projection Chamber version 2 -- detailed TPC and slow simulation // | |
22 | // // | |
23 | //Begin_Html | |
24 | /* | |
1439f98e | 25 | <img src="picts/AliTPCv2Class.gif"> |
fe4da5cc | 26 | */ |
27 | //End_Html | |
28 | // // | |
29 | // // | |
30 | /////////////////////////////////////////////////////////////////////////////// | |
116cbefd | 31 | |
d899e254 | 32 | //#include <stdlib.h> |
fe4da5cc | 33 | |
88cb7938 | 34 | #include <TLorentzVector.h> |
116cbefd | 35 | #include <TPDGCode.h> |
d9e80aca | 36 | #include <TString.h> |
f77f13c8 | 37 | #include "AliLog.h" |
73042f01 | 38 | #include "AliTPCParam.h" |
4ed5dced | 39 | #include "AliTPCTrackHitsV2.h" |
116cbefd | 40 | #include "AliTPCv2.h" |
c1637e41 | 41 | #include "TGeoVolume.h" |
42 | #include "TGeoPcon.h" | |
43 | #include "TGeoTube.h" | |
44 | #include "TGeoPgon.h" | |
45 | #include "TGeoTrd1.h" | |
46 | #include "TGeoCompositeShape.h" | |
47 | #include "TGeoPara.h" | |
48 | ClassImp(AliTPCv2) | |
49 | ||
50 | //_____________________________________________________________________________ | |
51 | AliTPCv2::AliTPCv2(const char *name, const char *title) : | |
52 | AliTPC(name, title) | |
53 | { | |
54 | // | |
55 | // Standard constructor for Time Projection Chamber version 2 | |
56 | // | |
6a905708 | 57 | |
37831078 | 58 | |
c1637e41 | 59 | SetBufferSize(128000); |
79575d04 | 60 | |
79575d04 | 61 | |
c1637e41 | 62 | if (fTPCParam) |
63 | fTPCParam->Write(fTPCParam->GetTitle()); | |
64 | } | |
65 | ||
66 | //_____________________________________________________________________________ | |
67 | void AliTPCv2::CreateGeometry() | |
68 | { | |
69 | // | |
70 | // Create the geometry of Time Projection Chamber version 2 | |
71 | // | |
72 | //Begin_Html | |
73 | /* | |
74 | <img src="picts/AliTPC.gif"> | |
75 | */ | |
76 | //End_Html | |
77 | //Begin_Html | |
78 | /* | |
79 | <img src="picts/AliTPCv2Tree.gif"> | |
80 | */ | |
81 | //End_Html | |
37831078 | 82 | |
83 | //---------------------------------------------------------- | |
c1637e41 | 84 | // This geometry is written using TGeo class |
85 | // Firstly the shapes are defined, and only then the volumes | |
86 | // What is recognized by the MC are volumes | |
37831078 | 87 | //---------------------------------------------------------- |
c1637e41 | 88 | // |
89 | // tpc - this will be the mother volume | |
90 | // | |
37831078 | 91 | |
c1637e41 | 92 | // |
93 | // here I define a volume TPC | |
94 | // retrive the medium name with "TPC_" as a leading string | |
95 | // | |
96 | TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections | |
97 | tpc->DefineSection(0,-290.,77.,278.); | |
456cb019 | 98 | tpc->DefineSection(1,-259.6,70.,278.); |
c1637e41 | 99 | // |
100 | tpc->DefineSection(2,-259.6,68.1,278.); | |
101 | tpc->DefineSection(3,-253.6,68.1,278.); | |
102 | // | |
103 | tpc->DefineSection(4,-253.6,68.,278.); | |
104 | tpc->DefineSection(5,-74.0,60.8,278.); | |
105 | // | |
106 | tpc->DefineSection(6,-74.0,60.1,278.); | |
107 | tpc->DefineSection(7,-73.3,60.1,278.); | |
108 | // | |
109 | tpc->DefineSection(8,-73.3,56.9,278.); | |
110 | tpc->DefineSection(9,73.3,56.9,278.); | |
111 | // | |
112 | tpc->DefineSection(10,73.3,60.1,278.); | |
113 | tpc->DefineSection(11,74.0,60.1,278.); | |
114 | // | |
115 | tpc->DefineSection(12,74.0,60.8,278.); | |
116 | tpc->DefineSection(13,253.6,65.5,278.); | |
117 | // | |
118 | tpc->DefineSection(14,253.6,65.6,278.); | |
119 | tpc->DefineSection(15,259.6,65.6,278.); | |
120 | // | |
456cb019 | 121 | tpc->DefineSection(16,259.6,70.0,278.); |
c1637e41 | 122 | tpc->DefineSection(17,290.,77.,278.); |
123 | // | |
124 | TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air"); | |
125 | TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1); | |
126 | // | |
127 | // drift volume - sensitive volume, extended beyond the | |
128 | // endcaps, because of the alignment | |
129 | // | |
130 | TGeoPcon *dvol = new TGeoPcon(0.,360.,6); | |
131 | dvol->DefineSection(0,-260.,74.5,264.4); | |
132 | dvol->DefineSection(1,-253.6,74.5,264.4); | |
133 | // | |
134 | dvol->DefineSection(2,-253.6,76.6774,258.); | |
135 | dvol->DefineSection(3,253.6,76.6774,258.); | |
136 | // | |
137 | dvol->DefineSection(4,253.6,74.5,264.4); | |
138 | dvol->DefineSection(5,260.,74.5,264.4); | |
139 | // | |
140 | TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2"); | |
141 | TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5); | |
142 | // | |
143 | v1->AddNode(v9,1); | |
144 | // | |
145 | // outer insulator | |
146 | // | |
147 | TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator | |
148 | // | |
149 | tpco->DefineSection(0,-256.6,264.8,278.); | |
150 | tpco->DefineSection(1,-253.6,264.8,278.); | |
151 | // | |
152 | tpco->DefineSection(2,-253.6,258.,278.); | |
153 | tpco->DefineSection(3,250.6,258.,278.); | |
154 | // | |
155 | tpco->DefineSection(4,250.6,258.,275.5); | |
156 | tpco->DefineSection(5,253.6,258.,275.5); | |
157 | // | |
158 | TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2"); | |
159 | TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2); | |
160 | // | |
161 | // outer containment vessel | |
162 | // | |
163 | TGeoPcon *tocv = new TGeoPcon(0.,360.,6); // containment vessel | |
164 | // | |
165 | tocv->DefineSection(0,-256.6,264.8,278.); | |
166 | tocv->DefineSection(1,-253.6,264.8,278.); | |
167 | // | |
168 | tocv->DefineSection(2,-253.6,274.8124,278.); | |
169 | tocv->DefineSection(3,247.6,274.8124,278.); | |
170 | // | |
171 | tocv->DefineSection(4,247.6,270.4,278.); | |
172 | tocv->DefineSection(5,250.6,270.4,278.); | |
173 | // | |
174 | TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al"); | |
175 | TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3); | |
176 | // | |
177 | TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy | |
178 | TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar | |
179 | TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2 | |
180 | TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex | |
181 | // | |
182 | TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy"); | |
183 | TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar"); | |
184 | TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2"); | |
185 | TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex"); | |
186 | // | |
187 | TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1); | |
188 | TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2); | |
189 | TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3); | |
190 | TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4); | |
191 | //------------------------------------------------------- | |
192 | // Tpc Outer Field Cage | |
193 | // daughters - composite (sandwich) | |
194 | //------------------------------------------------------- | |
37831078 | 195 | |
c1637e41 | 196 | TGeoPcon *tofc = new TGeoPcon(0.,360.,6); |
197 | // | |
198 | tofc->DefineSection(0,-253.6,258.,269.6); | |
199 | tofc->DefineSection(1,-250.6,258.,269.6); | |
200 | // | |
201 | tofc->DefineSection(2,-250.6,258.,260.0676); | |
202 | tofc->DefineSection(3,250.6,258.,260.0676); | |
203 | // | |
204 | tofc->DefineSection(4,250.6,258.,275.5); | |
205 | tofc->DefineSection(5,253.6,258.,275.5); | |
206 | // | |
207 | TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3); | |
208 | //sandwich | |
209 | TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar | |
210 | TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3 | |
211 | TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex | |
212 | // | |
213 | TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3"); | |
214 | // | |
215 | TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2); | |
216 | TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5); | |
217 | TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4); | |
218 | // | |
219 | // outer part - positioning | |
220 | // | |
221 | tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1); | |
222 | // | |
223 | tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1); | |
224 | // | |
456cb019 | 225 | v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1); |
c1637e41 | 226 | // |
227 | v2->AddNode(v3,1); v2->AddNode(v4,1); | |
228 | // | |
229 | v1->AddNode(v2,1); | |
230 | //-------------------------------------------------------------------- | |
231 | // Tpc Inner INsulator (CO2) | |
232 | // the cones, the central drum and the inner f.c. sandwich with a piece | |
233 | // of the flane will be placed in the TPC | |
234 | //-------------------------------------------------------------------- | |
235 | TGeoPcon *tpci = new TGeoPcon(0.,360.,4); | |
236 | // | |
237 | tpci->DefineSection(0,-253.6,68.4,76.6774); | |
238 | tpci->DefineSection(1,-74.0,61.2,76.6774); | |
239 | // | |
240 | tpci->DefineSection(2,74.0,61.2,76.6774); | |
241 | // | |
242 | tpci->DefineSection(3,253.6,65.9,76.6774); | |
243 | // | |
244 | TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2); | |
245 | // | |
246 | // now the inner field cage - only part of flanges (2 copies) | |
247 | // | |
248 | TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5); | |
249 | TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3); | |
250 | // | |
251 | //--------------------------------------------------------- | |
252 | // Tpc Inner Containment vessel - Muon side | |
253 | //--------------------------------------------------------- | |
254 | TGeoPcon *tcms = new TGeoPcon(0.,360.,10); | |
255 | // | |
256 | tcms->DefineSection(0,-259.1,68.1,74.2); | |
257 | tcms->DefineSection(1,-253.6,68.1,74.2); | |
258 | // | |
259 | tcms->DefineSection(2,-253.6,68.1,68.4); | |
260 | tcms->DefineSection(3,-74.0,60.9,61.2); | |
261 | // | |
262 | tcms->DefineSection(4,-74.0,60.1,61.2); | |
263 | tcms->DefineSection(5,-73.3,60.1,61.2); | |
264 | // | |
265 | tcms->DefineSection(6,-73.3,56.9,61.2); | |
266 | tcms->DefineSection(7,-73.0,56.9,61.2); | |
267 | // | |
268 | tcms->DefineSection(8,-73.0,56.9,58.8); | |
269 | tcms->DefineSection(9,-71.3,56.9,58.8); | |
270 | // | |
271 | TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3); | |
272 | //----------------------------------------------- | |
273 | // inner containment vessel - shaft side | |
274 | //----------------------------------------------- | |
275 | TGeoPcon *tcss = new TGeoPcon(0.,360.,10); | |
276 | // | |
277 | tcss->DefineSection(0,71.3,56.9,58.8); | |
278 | tcss->DefineSection(1,73.0,56.9,58.8); | |
279 | // | |
280 | tcss->DefineSection(2,73.0,56.9,61.2); | |
281 | tcss->DefineSection(3,73.3,56.9,61.2); | |
282 | // | |
283 | tcss->DefineSection(4,73.3,60.1,61.2); | |
284 | tcss->DefineSection(5,74.0,60.1,61.2); | |
285 | // | |
286 | tcss->DefineSection(6,74.0,60.9,61.2); | |
287 | tcss->DefineSection(7,253.6,65.6,65.9); | |
288 | // | |
289 | tcss->DefineSection(8,253.6,65.6,74.2); | |
290 | tcss->DefineSection(9,258.1,65.6,74.2); | |
291 | // | |
292 | TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3); | |
293 | //----------------------------------------------- | |
294 | // Inner field cage | |
295 | // define 4 parts and make an assembly | |
296 | //----------------------------------------------- | |
297 | // part1 - Al - 2 copies | |
298 | TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75); | |
299 | TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3); | |
300 | // sandwich - outermost parts - 2 copies | |
301 | TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns | |
302 | TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns | |
303 | TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns | |
304 | TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm | |
305 | // | |
306 | TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2); | |
307 | TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3); | |
308 | TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5); | |
309 | TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4); | |
310 | // | |
311 | // middle parts - 2 copies | |
312 | TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns | |
313 | TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns | |
314 | TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns | |
315 | TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm | |
316 | // | |
317 | TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2); | |
318 | TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3); | |
319 | TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5); | |
320 | TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4); | |
321 | // central part - 1 copy | |
322 | TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns | |
323 | TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns | |
324 | TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm | |
325 | // | |
326 | TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2); | |
327 | TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5); | |
328 | TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4); | |
329 | // | |
330 | // inner part - positioning | |
331 | // | |
332 | // creating a sandwich | |
333 | tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1); | |
334 | // | |
335 | tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1); | |
336 | // | |
337 | tv10->AddNode(tv11,1); tv11->AddNode(tv12,1); | |
338 | // | |
339 | TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC"); | |
340 | // | |
341 | tv100->AddNode(tv10,1); | |
342 | tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75)); | |
343 | tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75)); | |
344 | tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925)); | |
345 | tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925)); | |
346 | tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85)); | |
347 | tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85)); | |
348 | // | |
349 | v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1)); | |
350 | v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1)); | |
351 | v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1); | |
352 | v9->AddNode(tv100,1); | |
353 | // | |
354 | // central drum | |
355 | // | |
356 | // flange + sandwich | |
357 | // | |
358 | TGeoPcon *cfl = new TGeoPcon(0.,360.,6); | |
359 | cfl->DefineSection(0,-71.1,59.7,61.2); | |
360 | cfl->DefineSection(1,-68.6,59.7,61.2); | |
361 | // | |
362 | cfl->DefineSection(2,-68.6,60.6324,61.2); | |
363 | cfl->DefineSection(3,68.6,60.6324,61.2); | |
364 | // | |
365 | cfl->DefineSection(4,68.6,59.7,61.2); | |
366 | cfl->DefineSection(5,71.1,59.7,61.2); | |
367 | // | |
368 | TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3); | |
369 | // sandwich | |
370 | TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1); | |
371 | TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1); | |
372 | TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1); | |
373 | // | |
374 | TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1"); | |
375 | TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar | |
376 | TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1 | |
377 | TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex | |
378 | // | |
379 | // seals for central drum 2 copies | |
380 | // | |
381 | TGeoTube *cs = new TGeoTube(56.9,61.2,0.1); | |
382 | TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar"); | |
383 | TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7); | |
384 | v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.)); | |
385 | v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.)); | |
386 | // | |
387 | // seal collars | |
388 | TGeoPcon *se = new TGeoPcon(0.,360.,6); | |
389 | se->DefineSection(0,-72.8,59.7,61.2); | |
390 | se->DefineSection(1,-72.3,59.7,61.2); | |
391 | // | |
392 | se->DefineSection(2,-72.3,58.85,61.2); | |
393 | se->DefineSection(3,-71.6,58.85,61.2); | |
394 | // | |
395 | se->DefineSection(4,-71.6,59.7,61.2); | |
396 | se->DefineSection(5,-71.3,59.7,61.2); | |
397 | // | |
398 | TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3); | |
399 | // | |
400 | TGeoTube *si = new TGeoTube(56.9,58.8,1.); | |
401 | TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3); | |
402 | // | |
403 | // define reflection matrix | |
404 | // | |
4fa47888 | 405 | TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.); |
c1637e41 | 406 | // |
407 | cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1); | |
408 | // | |
ae4806ca | 409 | v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-70.1)); |
410 | v1->AddNode(siv,2,new TGeoTranslation(0.,0.,70.1)); | |
c1637e41 | 411 | v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1); |
412 | // | |
413 | // central membrane - 2 rings and a mylar membrane - assembly | |
414 | // | |
415 | TGeoTube *ih = new TGeoTube(81.05,84.05,0.3); | |
416 | TGeoTube *oh = new TGeoTube(250.,256.,.5); | |
417 | TGeoTube *mem = new TGeoTube(84.05,250,0.01); | |
418 | TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3); | |
419 | TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3); | |
420 | TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7); | |
421 | // | |
422 | TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM"); | |
423 | cm->AddNode(ihv,1); | |
424 | cm->AddNode(ohv,1); | |
425 | cm->AddNode(memv,1); | |
426 | v9->AddNode(cm,1); | |
427 | // | |
428 | // end caps - they are make as an assembly of single segments | |
429 | // containing both readout chambers | |
430 | // | |
d899e254 | 431 | Double_t openingAngle = 10.*TMath::DegToRad(); |
c1637e41 | 432 | Double_t thick=1.5; // rib |
d899e254 | 433 | Double_t shift = thick/TMath::Sin(openingAngle); |
c1637e41 | 434 | // |
d899e254 | 435 | Double_t lowEdge = 86.3; // hole in the wheel |
436 | Double_t upEdge = 240.4; // hole in the wheel | |
c1637e41 | 437 | // |
438 | new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.); | |
439 | // | |
440 | TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4); | |
441 | // | |
d899e254 | 442 | hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift); |
443 | hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift); | |
c1637e41 | 444 | // |
d899e254 | 445 | hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift); |
446 | hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift); | |
c1637e41 | 447 | // |
d899e254 | 448 | Double_t ys = shift*TMath::Sin(openingAngle); |
449 | Double_t xs = shift*TMath::Cos(openingAngle); | |
c1637e41 | 450 | TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.); |
451 | tr->RegisterYourself(); | |
452 | TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr"); | |
453 | TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3); | |
454 | TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2); | |
455 | bar->DefineSection(0,-3.,131.5-shift,136.5-shift); | |
456 | bar->DefineSection(1,1.5,131.5-shift,136.5-shift); | |
457 | TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3); | |
458 | TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment | |
459 | // | |
460 | ch->AddNode(sv,1); ch->AddNode(barv,1,tr); | |
461 | // | |
462 | // readout chambers | |
463 | // | |
464 | // IROC first | |
465 | // | |
466 | TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15); | |
467 | TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3); | |
468 | // empty space | |
469 | TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65); | |
470 | TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1); | |
471 | ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.)); | |
472 | //bars | |
473 | Double_t tga = (19.8328-12.3742)/39.3; | |
474 | Double_t xmin,xmax; | |
475 | xmin = 9.55*tga+12.3742; | |
476 | xmax = 9.95*tga+12.3742; | |
477 | TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2); | |
478 | TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3); | |
479 | empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9)); | |
480 | xmin=19.4*tga+12.3742; | |
481 | xmax=19.9*tga+12.3742; | |
482 | TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25); | |
483 | TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3); | |
484 | empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.)); | |
485 | xmin=29.35*tga+12.3742; | |
486 | xmax=29.75*tga+12.3742; | |
487 | TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2); | |
488 | TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3); | |
489 | empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9)); | |
490 | // | |
491 | // holes for connectors | |
492 | // | |
493 | TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc | |
494 | TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1); | |
d9e80aca | 495 | TString fileName(gSystem->Getenv("ALICE_ROOT")); |
496 | fileName += "/TPC/conn_iroc.dat"; | |
c1637e41 | 497 | ifstream in; |
d9e80aca | 498 | in.open(fileName.Data(), ios_base::in); // asci file |
c1637e41 | 499 | for(Int_t i =0;i<86;i++){ |
456cb019 | 500 | Double_t y = 3.99; |
c1637e41 | 501 | Double_t x,z,ang; |
502 | in>>x>>z>>ang; | |
456cb019 | 503 | z-=26.5; |
c1637e41 | 504 | TGeoRotation *rrr = new TGeoRotation(); |
505 | rrr->RotateY(ang); | |
506 | TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr); | |
507 | ibdv->AddNode(connv,i+1,trans); | |
508 | } | |
509 | in.close(); | |
510 | // "cap" | |
511 | new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825); | |
512 | // "hole" | |
513 | new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15); | |
514 | TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725); | |
515 | tr1->RegisterYourself(); | |
516 | TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1"); | |
517 | TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3); | |
518 | // | |
519 | // pad plane and wire fixations | |
520 | // | |
521 | TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso | |
522 | TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10"); | |
523 | TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4); | |
524 | TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.); | |
525 | TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4); | |
526 | TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.); | |
527 | TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4); | |
528 | // | |
529 | TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC"); | |
530 | // | |
531 | iroc->AddNode(ibdv,1); | |
532 | iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725)); | |
533 | iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725)); | |
534 | tga =(23.3521-14.5974)/49.65; | |
535 | Double_t xx = 24.825*tga+14.5974-0.6; | |
536 | iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725)); | |
537 | iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725)); | |
538 | // | |
539 | // OROC | |
540 | // | |
541 | TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65); | |
542 | TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3); | |
543 | TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65); | |
544 | TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1); | |
545 | obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.)); | |
546 | //horizontal bars | |
547 | tga=(38.5084-20.2938)/99.3; | |
548 | xmin=tga*10.2+20.2938; | |
549 | xmax=tga*10.6+20.2938; | |
550 | TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2); | |
551 | TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3); | |
552 | // | |
553 | xmin=22.55*tga+20.2938; | |
554 | xmax=24.15*tga+20.2938; | |
555 | TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8); | |
556 | TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3); | |
557 | // | |
558 | xmin=36.1*tga+20.2938; | |
559 | xmax=36.5*tga+20.2938; | |
560 | TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2); | |
561 | TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3); | |
562 | // | |
563 | xmin=49.0*tga+20.2938; | |
564 | xmax=50.6*tga+20.2938; | |
565 | TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8); | |
566 | TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3); | |
567 | // | |
568 | xmin=63.6*tga+20.2938; | |
569 | xmax=64.0*tga+20.2938; | |
570 | TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2); | |
571 | TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3); | |
572 | // | |
573 | xmin=75.5*tga+20.2938; | |
574 | xmax=77.15*tga+20.2938; | |
575 | TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8); | |
576 | TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3); | |
577 | // | |
578 | xmin=88.7*tga+20.2938; | |
579 | xmax=89.1*tga+20.2938; | |
580 | TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2); | |
581 | TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3); | |
582 | // | |
583 | oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25)); | |
584 | oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3)); | |
585 | oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35)); | |
586 | oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15)); | |
587 | oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15)); | |
588 | oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7)); | |
589 | oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25)); | |
590 | // vertical bars | |
591 | TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1); | |
592 | TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975); | |
593 | TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775); | |
594 | TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25); | |
595 | TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5); | |
596 | // | |
597 | TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3); | |
598 | TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3); | |
599 | TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3); | |
600 | TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3); | |
601 | TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3); | |
602 | // | |
603 | oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55)); | |
604 | oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55)); | |
605 | oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075)); | |
606 | oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525)); | |
607 | oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125)); | |
608 | oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275)); | |
609 | oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9)); | |
610 | oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45)); | |
611 | // | |
612 | // holes for connectors | |
613 | // | |
d9e80aca | 614 | fileName = gSystem->Getenv("ALICE_ROOT"); |
615 | fileName += "/TPC/conn_oroc.dat"; | |
616 | in.open(fileName.Data(), ios_base::in); // asci file | |
c1637e41 | 617 | for(Int_t i =0;i<78;i++){ |
618 | Double_t y =3.89; | |
619 | Double_t x,z,ang; | |
620 | Double_t x1,z1,x2,z2; | |
621 | in>>x>>z>>ang; | |
622 | Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad()); | |
623 | Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad()); | |
624 | // | |
625 | x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z; | |
626 | // | |
627 | TGeoRotation *rr = new TGeoRotation(); | |
628 | rr->RotateY(ang); | |
629 | z1-=54.95; | |
630 | z2-=54.95; | |
631 | TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr); | |
632 | TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr); | |
633 | obdv->AddNode(connv,i+1,trans1); | |
634 | obdv->AddNode(connv,i+79,trans2); | |
635 | } | |
636 | in.close(); | |
637 | // cap | |
638 | new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1); | |
639 | new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65); | |
640 | TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15); | |
641 | tr5->RegisterYourself(); | |
642 | TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5"); | |
643 | TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3); | |
644 | // | |
645 | // pad plane and wire fixations | |
646 | // | |
647 | TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1); | |
648 | TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4); | |
649 | // | |
650 | tga=(43.5239-23.3874)/114.2; | |
651 | TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.); | |
652 | TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.); | |
653 | xx = 57.1*tga+23.3874-0.7; | |
654 | TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4); | |
655 | TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4); | |
656 | // | |
657 | TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC"); | |
658 | // | |
659 | oroc->AddNode(obdv,1); | |
660 | oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15)); | |
661 | oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15)); | |
662 | oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15)); | |
663 | oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15)); | |
664 | // | |
665 | // now iroc and oroc are placed into a sector... | |
666 | // | |
667 | TGeoVolumeAssembly *sect = new TGeoVolumeAssembly("TPC_SECT"); | |
668 | TGeoRotation rot1("rot1",90.,90.,0.); | |
669 | TGeoRotation rot2("rot2"); | |
670 | rot2.RotateY(10.); | |
671 | TGeoRotation *rot = new TGeoRotation("rot"); | |
672 | *rot=rot1*rot2; | |
673 | // | |
674 | Double_t x0,y0; | |
d899e254 | 675 | x0=110.2*TMath::Cos(openingAngle); |
676 | y0=110.2*TMath::Sin(openingAngle); | |
c1637e41 | 677 | TGeoCombiTrans *combi1 = new TGeoCombiTrans("combi1",x0,y0,1.09,rot); |
d899e254 | 678 | x0=188.45*TMath::Cos(openingAngle); |
679 | y0=188.45*TMath::Sin(openingAngle); | |
c1637e41 | 680 | TGeoCombiTrans *combi2 = new TGeoCombiTrans("combi2",x0,y0,0.99,rot); |
681 | // | |
682 | sect->AddNode(ch,1); | |
683 | sect->AddNode(iroc,1,combi1); | |
684 | sect->AddNode(oroc,1,combi2); | |
685 | // | |
686 | // segment is ready... | |
687 | // now I try to make a wheel... | |
688 | // | |
689 | TGeoVolumeAssembly *wheel = new TGeoVolumeAssembly("TPC_ENDCAP"); | |
690 | // | |
691 | for(Int_t i =0;i<18;i++){ | |
692 | Double_t phi = (20.*i); | |
693 | TGeoRotation *r = new TGeoRotation(); | |
694 | r->RotateZ(phi); | |
695 | wheel->AddNode(sect,i+1,r); | |
79575d04 | 696 | |
c1637e41 | 697 | } |
4fa47888 | 698 | // wheels in the drift volume! |
c1637e41 | 699 | TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref); |
4fa47888 | 700 | v9->AddNode(wheel,1,combi3); |
701 | v9->AddNode(wheel,2,new TGeoTranslation(0.,0.,-256.6)); | |
c1637e41 | 702 | //_____________________________________________________________ |
703 | // service support wheel | |
704 | //_____________________________________________________________ | |
705 | TGeoPgon *sw = new TGeoPgon(0.,20.,1,2); | |
706 | sw->DefineSection(0,-4.,80.5,251.75); | |
707 | sw->DefineSection(1,4.,80.5,251.75); | |
708 | TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al | |
709 | // | |
710 | thick=1.; | |
d899e254 | 711 | shift = thick/TMath::Sin(openingAngle); |
c1637e41 | 712 | TGeoPgon *sh = new TGeoPgon(0.,20.,1,2); |
713 | sh->DefineSection(0,-4.,81.5-shift,250.75-shift); | |
714 | sh->DefineSection(1,4.,81.5-shift,250.75-shift); | |
715 | TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air | |
716 | // | |
74518339 | 717 | TGeoMedium *m9 = gGeoManager->GetMedium("TPC_Si"); |
718 | TGeoPgon *el = new TGeoPgon(0.,20.,1,2); | |
719 | el->DefineSection(0,-1.872,81.5-shift,250.75-shift); | |
720 | el->DefineSection(1,1.872,81.5-shift,250.75-shift); | |
721 | TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si | |
722 | // | |
723 | shv->AddNode(elv,1); | |
724 | // | |
725 | // | |
d899e254 | 726 | ys = shift*TMath::Sin(openingAngle); |
727 | xs = shift*TMath::Cos(openingAngle); | |
c1637e41 | 728 | swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.)); |
729 | // cover | |
730 | TGeoPgon *co = new TGeoPgon(0.,20.,1,2); | |
731 | co->DefineSection(0,-0.5,77.,255.25); | |
732 | co->DefineSection(1,0.5,77.,255.25); | |
733 | TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al | |
734 | // hole in a cover | |
735 | TGeoPgon *coh = new TGeoPgon(0.,20.,1,2); | |
d899e254 | 736 | shift=4./TMath::Sin(openingAngle); |
c1637e41 | 737 | coh->DefineSection(0,-0.5,85.-shift,247.25-shift); |
738 | coh->DefineSection(1,0.5,85.-shift,247.25-shift); | |
739 | // | |
740 | TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1); | |
741 | // | |
d899e254 | 742 | ys = shift*TMath::Sin(openingAngle); |
743 | xs = shift*TMath::Cos(openingAngle); | |
c1637e41 | 744 | cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.)); |
745 | // | |
746 | // Sector as an Assembly | |
747 | // | |
748 | TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC"); | |
749 | swhs->AddNode(swv,1); | |
750 | swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5)); | |
751 | swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5)); | |
752 | // | |
753 | // SSW as an Assembly of sectors | |
754 | // | |
755 | TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL"); | |
756 | for(Int_t i =0;i<18;i++){ | |
757 | Double_t phi = (20.*i); | |
758 | TGeoRotation *r = new TGeoRotation(); | |
759 | r->RotateZ(phi); | |
760 | swheel->AddNode(swhs,i+1,r); | |
761 | } | |
762 | v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6)); | |
763 | v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6)); | |
764 | ||
765 | // sensitive strips - strip "0" is always set | |
766 | // conditional | |
767 | Int_t totrows; | |
768 | totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp(); | |
769 | Double_t *upar; | |
770 | upar=NULL; | |
771 | gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar); | |
772 | upar=new Double_t [10]; | |
773 | upar[0]=0.; | |
774 | upar[1]=360.; | |
775 | upar[2]=18.; | |
776 | upar[3]=2.; | |
777 | // | |
778 | upar[4]=-124.8; | |
779 | upar[7]=124.8; | |
780 | ||
781 | Double_t rlow=fTPCParam->GetPadRowRadiiLow(0); | |
782 | ||
783 | upar[5]=rlow; | |
784 | upar[6]=rlow+.01; | |
785 | upar[8]=upar[5]; | |
786 | upar[9]=upar[6]; | |
787 | // | |
788 | gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10); | |
789 | gGeoManager->Node("TPC_Strip",totrows+1, | |
790 | "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10); | |
791 | // | |
792 | // now, strips optionally | |
793 | // | |
794 | if(fSens){ | |
795 | //lower sectors | |
796 | for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){ | |
797 | rlow=fTPCParam->GetPadRowRadiiLow(i-1); | |
798 | upar[5]=rlow; | |
799 | upar[6]=rlow+.01; | |
800 | upar[8]=upar[5]; | |
801 | upar[9]=upar[6]; | |
802 | gGeoManager->Node("TPC_Strip",i, | |
803 | "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10); | |
804 | gGeoManager->Node("TPC_Strip",totrows+i, | |
805 | "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10); | |
806 | } | |
807 | //upper sectors | |
808 | for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){ | |
809 | rlow=fTPCParam->GetPadRowRadiiUp(i-1); | |
810 | upar[5]=rlow; | |
811 | upar[6]=rlow+.01; | |
812 | upar[8]=upar[5]; | |
813 | upar[9]=upar[6]; | |
814 | gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(), | |
815 | "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10); | |
816 | gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(), | |
817 | "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10); | |
818 | } | |
819 | }//strips | |
37831078 | 820 | //---------------------------------------------------------- |
c1637e41 | 821 | // TPc Support Rods - MAKROLON |
37831078 | 822 | //---------------------------------------------------------- |
c1637e41 | 823 | TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon"); |
824 | TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu"); | |
825 | // upper and lower rods differ in length! | |
826 | delete [] upar; | |
827 | upar=NULL; | |
828 | gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar); | |
829 | upar=new Double_t [3]; | |
830 | upar[0]=1.8; | |
831 | upar[1]=2.2; | |
832 | ||
79575d04 | 833 | // |
c1637e41 | 834 | //HV rods - makrolon + 0.58cm (diameter) Cu |
ae4806ca | 835 | TGeoTube *hvr = new TGeoTube(0.,2.2,126.64); |
c1637e41 | 836 | TGeoTube *hvc = new TGeoTube(0.,0.29,126.64); |
837 | // | |
838 | TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6); | |
839 | TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7); | |
840 | hvrv->AddNode(hvcv,1); | |
841 | ||
7281dc07 | 842 | for(Int_t i=0;i<18;i++){ |
c1637e41 | 843 | Double_t angle,x,y; |
844 | Double_t z,r; | |
845 | angle=TMath::DegToRad()*20.*(Double_t)i; | |
846 | r=81.5; | |
847 | x=r * TMath::Cos(angle); | |
848 | y=r * TMath::Sin(angle); | |
849 | upar[2]=126.64; //lower | |
850 | z= 126.96; | |
851 | if(i==15){ | |
852 | v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z)); | |
853 | v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z)); | |
854 | } | |
855 | else{ | |
856 | gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft | |
0079eac0 | 857 | gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon |
c1637e41 | 858 | } |
859 | r=254.25; | |
860 | x=r * TMath::Cos(angle); | |
861 | y=r * TMath::Sin(angle); | |
862 | upar[2]=126.54; //upper | |
863 | z=127.06; | |
0079eac0 | 864 | gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3); |
865 | gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3); | |
c1637e41 | 866 | } |
79575d04 | 867 | |
bde68ab0 | 868 | TGeoVolume *alice = gGeoManager->GetVolume("ALIC"); |
869 | alice->AddNode(v1,1); | |
c1637e41 | 870 | |
37831078 | 871 | } // end of function |
872 | ||
ac81c411 | 873 | //_____________________________________________________________________________ |
874 | void AliTPCv2::AddAlignableVolumes() const | |
875 | { | |
876 | // | |
877 | // Create entries for alignable volumes associating the symbolic volume | |
878 | // name with the corresponding volume path. Needs to be syncronized with | |
879 | // eventual changes in the geometry. | |
880 | // | |
881 | SetInnerChambersAlignable(); | |
882 | SetOuterChambersAlignable(); | |
883 | } | |
884 | ||
885 | //_____________________________________________________________________________ | |
886 | void AliTPCv2::SetInnerChambersAlignable() const | |
887 | { | |
888 | // | |
889 | Int_t modnum = 0; | |
d899e254 | 890 | TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_"; |
891 | TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_"; | |
892 | TString vpappend = "/TPC_IROC_1"; | |
893 | TString snstr1="TPC/EndcapA/Sector"; | |
894 | TString snstr2="TPC/EndcapC/Sector"; | |
895 | TString snappend="/InnerChamber"; | |
ac81c411 | 896 | TString volpath, symname; |
897 | ||
65293f49 | 898 | for(Int_t cnt=1; cnt<=18; cnt++){ |
d899e254 | 899 | volpath = vpstr1; |
65293f49 | 900 | volpath += cnt; |
d899e254 | 901 | volpath += vpappend; |
902 | symname = snstr1; | |
65293f49 | 903 | symname += cnt; |
d899e254 | 904 | symname += snappend; |
84cbbd90 | 905 | if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data())) |
906 | AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data())); | |
65293f49 | 907 | modnum++; |
908 | } | |
65293f49 | 909 | |
ac81c411 | 910 | for(Int_t cnt=1; cnt<=18; cnt++){ |
d899e254 | 911 | volpath = vpstr2; |
ac81c411 | 912 | volpath += cnt; |
d899e254 | 913 | volpath += vpappend; |
914 | symname = snstr2; | |
ac81c411 | 915 | symname += cnt; |
d899e254 | 916 | symname += snappend; |
84cbbd90 | 917 | if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data())) |
918 | AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data())); | |
ac81c411 | 919 | modnum++; |
920 | } | |
921 | } | |
922 | ||
ac81c411 | 923 | //_____________________________________________________________________________ |
924 | void AliTPCv2::SetOuterChambersAlignable() const | |
925 | { | |
926 | // | |
927 | Int_t modnum = 0; | |
d899e254 | 928 | TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_"; |
929 | TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_"; | |
930 | TString vpappend = "/TPC_OROC_1"; | |
931 | TString snstr1="TPC/EndcapA/Sector"; | |
932 | TString snstr2="TPC/EndcapC/Sector"; | |
933 | TString snappend="/OuterChamber"; | |
ac81c411 | 934 | TString volpath, symname; |
935 | ||
936 | for(Int_t cnt=1; cnt<=18; cnt++){ | |
d899e254 | 937 | volpath = vpstr1; |
ac81c411 | 938 | volpath += cnt; |
d899e254 | 939 | volpath += vpappend; |
940 | symname = snstr1; | |
ac81c411 | 941 | symname += cnt; |
d899e254 | 942 | symname += snappend; |
84cbbd90 | 943 | if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data())) |
944 | AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data())); | |
ac81c411 | 945 | modnum++; |
946 | } | |
84cbbd90 | 947 | |
ac81c411 | 948 | for(Int_t cnt=1; cnt<=18; cnt++){ |
d899e254 | 949 | volpath = vpstr2; |
ac81c411 | 950 | volpath += cnt; |
d899e254 | 951 | volpath += vpappend; |
952 | symname = snstr2; | |
ac81c411 | 953 | symname += cnt; |
d899e254 | 954 | symname += snappend; |
84cbbd90 | 955 | if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data())) |
956 | AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data())); | |
ac81c411 | 957 | modnum++; |
958 | } | |
959 | } | |
960 | ||
37831078 | 961 | //_____________________________________________________________________________ |
d899e254 | 962 | void AliTPCv2::DrawDetector() const |
37831078 | 963 | { |
964 | // | |
965 | // Draw a shaded view of the Time Projection Chamber version 1 | |
966 | // | |
967 | ||
968 | // Set everything unseen | |
969 | gMC->Gsatt("*", "seen", -1); | |
970 | // | |
971 | // Set ALIC mother transparent | |
972 | gMC->Gsatt("ALIC","SEEN",0); | |
973 | // | |
974 | // Set the volumes visible | |
975 | // | |
976 | ||
977 | gMC->Gsatt("TPC ","SEEN",0); | |
978 | gMC->Gsatt("TOIN","SEEN",1); | |
979 | gMC->Gsatt("TOIN","COLO",7); | |
37831078 | 980 | gMC->Gsatt("TOCV","SEEN",1); |
981 | gMC->Gsatt("TOCV","COLO",4); | |
982 | gMC->Gsatt("TSA1","SEEN",0); | |
983 | gMC->Gsatt("TSA2","SEEN",0); | |
984 | gMC->Gsatt("TSA3","SEEN",0); | |
79575d04 | 985 | gMC->Gsatt("TSA4","SEEN",0); |
986 | gMC->Gsatt("TSA5","SEEN",0); | |
37831078 | 987 | gMC->Gsatt("TOFC","SEEN",1); |
988 | gMC->Gsatt("TOFC","COLO",4); | |
37831078 | 989 | gMC->Gsatt("TSA6","SEEN",0); |
990 | gMC->Gsatt("TSA7","SEEN",0); | |
79575d04 | 991 | gMC->Gsatt("TSA8","SEEN",0); |
37831078 | 992 | gMC->Gsatt("TIIN","SEEN",1); |
79575d04 | 993 | gMC->Gsatt("TIIN","COLO",7); |
994 | gMC->Gsatt("TII1","SEEN",0); | |
995 | gMC->Gsatt("TIFC","SEEN",1); | |
996 | gMC->Gsatt("TIFC","COLO",4); | |
997 | gMC->Gsatt("TSA9","SEEN",0); | |
37831078 | 998 | gMC->Gsatt("TS10","SEEN",0); |
999 | gMC->Gsatt("TS11","SEEN",0); | |
1000 | gMC->Gsatt("TS12","SEEN",0); | |
37831078 | 1001 | gMC->Gsatt("TS13","SEEN",0); |
1002 | gMC->Gsatt("TS14","SEEN",0); | |
79575d04 | 1003 | gMC->Gsatt("TICC","SEEN",0); |
1004 | gMC->Gsatt("TICM","SEEN",0); | |
37831078 | 1005 | gMC->Gsatt("TS15","SEEN",0); |
1006 | gMC->Gsatt("TS16","SEEN",0); | |
37831078 | 1007 | gMC->Gsatt("TS17","SEEN",0); |
79575d04 | 1008 | gMC->Gsatt("TS18","SEEN",0); |
1009 | gMC->Gsatt("TS19","SEEN",0); | |
1010 | gMC->Gsatt("TPJ1","SEEN",0); | |
1011 | gMC->Gsatt("TPJ2","SEEN",0); | |
1012 | gMC->Gsatt("TICS","SEEN",0); | |
1013 | gMC->Gsatt("TDGN","SEEN",0); | |
37831078 | 1014 | gMC->Gsatt("TIRC","SEEN",0); |
1015 | gMC->Gsatt("TIC1","SEEN",1); | |
1016 | gMC->Gsatt("TIPP","SEEN",0); | |
1017 | gMC->Gsatt("TIC3","SEEN",0); | |
1018 | gMC->Gsatt("TRCE","SEEN",0); | |
1019 | gMC->Gsatt("TPSC","SEEN",0); | |
79575d04 | 1020 | gMC->Gsatt("TPCC","SEEN",0); |
37831078 | 1021 | gMC->Gsatt("TORC","SEEN",0); |
1022 | gMC->Gsatt("TOPP","SEEN",0); | |
1023 | gMC->Gsatt("TOC3","SEEN",0); | |
1024 | gMC->Gsatt("TOC1","SEEN",1); | |
1025 | gMC->Gsatt("TSSW","SEEN",1); | |
1026 | gMC->Gsatt("TSWC","SEEN",1); | |
37831078 | 1027 | gMC->Gsatt("TSSW","COLO",3); |
1028 | gMC->Gsatt("TSWC","COLO",3); | |
1029 | gMC->Gsatt("TSCE","COLO",6); | |
79575d04 | 1030 | gMC->Gsatt("TSCE","SEEN",1); |
37831078 | 1031 | gMC->Gsatt("TWES","SEEN",0); |
1032 | gMC->Gsatt("TSWB","SEEN",0); | |
1033 | gMC->Gsatt("TPEL","SEEN",0); | |
1034 | gMC->Gsatt("TPMW","SEEN",1); | |
37831078 | 1035 | gMC->Gsatt("TESR","SEEN",1); |
1036 | gMC->Gsatt("TPMW","COLO",12); | |
37831078 | 1037 | gMC->Gsatt("TIC1","COLO",5); |
79575d04 | 1038 | gMC->Gsatt("TOC1","COLO",5); |
37831078 | 1039 | gMC->Gsatt("TESB","SEEN",0); |
37831078 | 1040 | gMC->Gsatt("THVM","SEEN",1); |
1041 | gMC->Gsatt("THVM","COLO",11); | |
79575d04 | 1042 | gMC->Gsatt("THVH","SEEN",0); |
1043 | gMC->Gsatt("TPSR","SEEN",0); | |
37831078 | 1044 | gMC->Gsatt("THVL","SEEN",0); |
79575d04 | 1045 | gMC->Gsatt("THVC","SEEN",0); |
37831078 | 1046 | gMC->Gsatt("THVE","SEEN",0); |
1047 | gMC->Gsatt("THVR","SEEN",0); | |
79575d04 | 1048 | gMC->Gsatt("TPSS","SEEN",0); |
1049 | gMC->Gsatt("TPUS","SEEN",0); | |
1050 | gMC->Gsatt("TPLS","SEEN",0); | |
37831078 | 1051 | |
1052 | // | |
1053 | gMC->Gdopt("hide", "on"); | |
1054 | gMC->Gdopt("shad", "on"); | |
1055 | gMC->Gsatt("*", "fill", 7); | |
1056 | gMC->SetClipBox("."); | |
1057 | gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.); | |
1058 | gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.); | |
1059 | gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.); | |
1060 | gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.); | |
1061 | gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290); | |
1062 | gMC->DefaultRange(); | |
1063 | gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025); | |
1064 | gMC->Gdhead(1111, "Time Projection Chamber"); | |
1065 | gMC->Gdman(18, 4, "MAN"); | |
1066 | gMC->Gdopt("hide","off"); | |
1067 | } | |
1068 | ||
1069 | //_____________________________________________________________________________ | |
1070 | void AliTPCv2::CreateMaterials() | |
1071 | { | |
1072 | // | |
1073 | // Define materials for version 2 of the Time Projection Chamber | |
1074 | // | |
1075 | ||
1076 | AliTPC::CreateMaterials(); | |
1077 | } | |
1078 | ||
1079 | //_____________________________________________________________________________ | |
1080 | void AliTPCv2::Init() | |
1081 | { | |
1082 | // | |
1083 | // Initialises version 2 of the TPC after that it has been built | |
1084 | // | |
1085 | ||
1086 | Int_t *idtmed = fIdtmed->GetArray(); | |
1087 | ||
1088 | AliTPC::Init(); | |
d4c354b9 | 1089 | |
c1637e41 | 1090 | |
1091 | fIdSens=gMC->VolId("TPC_Strip"); // one strip is always selected... | |
d4c354b9 | 1092 | |
c1637e41 | 1093 | fIDrift=gMC->VolId("TPC_Drift"); |
1094 | fSecOld=-100; // fake number | |
37831078 | 1095 | |
1096 | gMC->SetMaxNStep(30000); // max. number of steps increased | |
1097 | ||
1098 | gMC->Gstpar(idtmed[2],"LOSS",5); // specific energy loss | |
1099 | ||
f77f13c8 | 1100 | AliInfo("*** TPC version 2 initialized ***"); |
1101 | AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep())); | |
37831078 | 1102 | |
1103 | // | |
fe4da5cc | 1104 | |
1105 | } | |
1106 | ||
1107 | //_____________________________________________________________________________ | |
1108 | void AliTPCv2::StepManager() | |
1109 | { | |
1110 | // | |
1111 | // Called for every step in the Time Projection Chamber | |
1112 | // | |
1113 | ||
1114 | // | |
1115 | // parameters used for the energy loss calculations | |
1116 | // | |
73042f01 | 1117 | const Float_t kprim = 14.35; // number of primary collisions per 1 cm |
1118 | const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2 | |
1119 | const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation | |
fe4da5cc | 1120 | |
1121 | ||
73042f01 | 1122 | const Float_t kbig = 1.e10; |
fe4da5cc | 1123 | |
1124 | Int_t id,copy; | |
e61fd20d | 1125 | Float_t hits[5]; |
fe4da5cc | 1126 | Int_t vol[2]; |
37831078 | 1127 | TLorentzVector p; |
fe4da5cc | 1128 | |
37831078 | 1129 | vol[1]=0; // preset row number to 0 |
fe4da5cc | 1130 | // |
73042f01 | 1131 | gMC->SetMaxStep(kbig); |
fe4da5cc | 1132 | |
0a6d8768 | 1133 | if(!gMC->IsTrackAlive()) return; // particle has disappeared |
fe4da5cc | 1134 | |
cfce8870 | 1135 | Float_t charge = gMC->TrackCharge(); |
fe4da5cc | 1136 | |
1137 | if(TMath::Abs(charge)<=0.) return; // take only charged particles | |
1138 | ||
37831078 | 1139 | // check the sensitive volume |
1140 | ||
c1637e41 | 1141 | id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!) |
1142 | if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume | |
da33556f | 1143 | |
c1637e41 | 1144 | gMC->TrackPosition(p); |
1145 | Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]); | |
1146 | // | |
1147 | ||
1148 | // | |
1149 | Double_t angle = TMath::ACos(p[0]/r); | |
1150 | angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle; | |
1151 | // | |
1152 | // angular segment, it is not a real sector number... | |
1153 | // | |
1154 | Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/ | |
1155 | fTPCParam->GetInnerAngle()); | |
1156 | // rotate to segment "0" | |
1157 | Float_t cos,sin; | |
1158 | fTPCParam->AdjustCosSin(sector,cos,sin); | |
1159 | Float_t x1=p[0]*cos + p[1]*sin; | |
1160 | // check if within sector's limits | |
1161 | if(x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp() | |
1162 | ||x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp()){ | |
1163 | // calculate real sector number... | |
1164 | if (x1>fTPCParam->GetOuterRadiusLow()){ | |
1165 | sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/ | |
1166 | fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector(); | |
1167 | if (p[2]<0) sector+=(fTPCParam->GetNOuterSector()>>1); | |
37831078 | 1168 | } |
c1637e41 | 1169 | else |
1170 | if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1); | |
1171 | // | |
1172 | // here I have a sector number | |
1173 | // | |
37831078 | 1174 | |
c1637e41 | 1175 | vol[0]=sector; |
1176 | // check if change of sector | |
1177 | if(sector != fSecOld){ | |
1178 | fSecOld=sector; | |
1179 | // add track reference | |
1180 | AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber()); | |
1181 | } | |
1182 | // track is in the sensitive strip | |
1183 | if(id == fIdSens){ | |
1184 | // track is entering the strip | |
1185 | if (gMC->IsTrackEntering()){ | |
1186 | Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp(); | |
1187 | vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows; | |
1188 | // row numbers are autonomous for lower and upper sectors | |
1189 | if(vol[0] > fTPCParam->GetNInnerSector()) { | |
1190 | vol[1] -= fTPCParam->GetNRowLow(); | |
1191 | } | |
1192 | // | |
1193 | if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){ | |
37831078 | 1194 | |
c1637e41 | 1195 | // lower sector, row 0, because Jouri wants to have this |
37831078 | 1196 | |
c1637e41 | 1197 | gMC->TrackMomentum(p); |
1198 | hits[0]=p[0]; | |
1199 | hits[1]=p[1]; | |
1200 | hits[2]=p[2]; | |
1201 | hits[3]=0.; // this hit has no energy loss | |
1202 | // Get also the track time for pileup simulation | |
1203 | hits[4]=gMC->TrackTime(); | |
6a905708 | 1204 | |
c1637e41 | 1205 | AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); |
1206 | } | |
1207 | // | |
e61fd20d | 1208 | |
c1637e41 | 1209 | gMC->TrackPosition(p); |
1210 | hits[0]=p[0]; | |
1211 | hits[1]=p[1]; | |
1212 | hits[2]=p[2]; | |
1213 | hits[3]=0.; // this hit has no energy loss | |
1214 | // Get also the track time for pileup simulation | |
1215 | hits[4]=gMC->TrackTime(); | |
930ee558 | 1216 | |
c1637e41 | 1217 | AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); |
37831078 | 1218 | |
c1637e41 | 1219 | } |
1220 | else return; | |
1221 | } | |
37831078 | 1222 | //----------------------------------------------------------------- |
c1637e41 | 1223 | // charged particle is in the sensitive drift volume |
37831078 | 1224 | //----------------------------------------------------------------- |
cfce8870 | 1225 | if(gMC->TrackStep() > 0) { |
c1637e41 | 1226 | |
73042f01 | 1227 | Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1; |
fe4da5cc | 1228 | nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV |
c1637e41 | 1229 | // |
37831078 | 1230 | gMC->TrackPosition(p); |
1231 | hits[0]=p[0]; | |
1232 | hits[1]=p[1]; | |
1233 | hits[2]=p[2]; | |
fe4da5cc | 1234 | hits[3]=(Float_t)nel; |
c1637e41 | 1235 | |
fe4da5cc | 1236 | // Add this hit |
c1637e41 | 1237 | |
6a905708 | 1238 | if (fHitType&&2){ |
1239 | gMC->TrackMomentum(p); | |
1240 | Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]); | |
1241 | Float_t precision = (momentum>0.1) ? 0.002 :0.01; | |
1242 | fTrackHits->SetHitPrecision(precision); | |
1243 | } | |
e61fd20d | 1244 | |
1245 | // Get also the track time for pileup simulation | |
1246 | hits[4]=gMC->TrackTime(); | |
c1637e41 | 1247 | |
1248 | AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); | |
e61fd20d | 1249 | |
c1637e41 | 1250 | } // step>0 |
1251 | } //within sector's limits | |
fe4da5cc | 1252 | // Stemax calculation for the next step |
1253 | ||
1254 | Float_t pp; | |
0a6d8768 | 1255 | TLorentzVector mom; |
1256 | gMC->TrackMomentum(mom); | |
1257 | Float_t ptot=mom.Rho(); | |
73042f01 | 1258 | Float_t betaGamma = ptot/gMC->TrackMass(); |
fe4da5cc | 1259 | |
69e40cce | 1260 | Int_t pid=gMC->TrackPid(); |
cc80f89e | 1261 | if((pid==kElectron || pid==kPositron) && ptot > 0.002) |
fe4da5cc | 1262 | { |
73042f01 | 1263 | pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau! |
fe4da5cc | 1264 | } |
1265 | else | |
1266 | { | |
595bf2c3 | 1267 | |
07521998 | 1268 | betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg |
595bf2c3 | 1269 | pp=kprim*BetheBloch(betaGamma); |
1270 | ||
fe4da5cc | 1271 | if(TMath::Abs(charge) > 1.) pp *= (charge*charge); |
1272 | } | |
1273 | ||
b9d0a01d | 1274 | Double_t rnd = gMC->GetRandom()->Rndm(); |
fe4da5cc | 1275 | |
cfce8870 | 1276 | gMC->SetMaxStep(-TMath::Log(rnd)/pp); |
fe4da5cc | 1277 | |
c1637e41 | 1278 | |
fe4da5cc | 1279 | } |
1280 | ||
1281 | //_____________________________________________________________________________ | |
1282 | Float_t AliTPCv2::BetheBloch(Float_t bg) | |
1283 | { | |
1284 | // | |
1285 | // Bethe-Bloch energy loss formula | |
1286 | // | |
73042f01 | 1287 | const Double_t kp1=0.76176e-1; |
1288 | const Double_t kp2=10.632; | |
1289 | const Double_t kp3=0.13279e-4; | |
1290 | const Double_t kp4=1.8631; | |
1291 | const Double_t kp5=1.9479; | |
fe4da5cc | 1292 | |
1293 | Double_t dbg = (Double_t) bg; | |
1294 | ||
1295 | Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg); | |
1296 | ||
73042f01 | 1297 | Double_t aa = TMath::Power(beta,kp4); |
1298 | Double_t bb = TMath::Power(1./dbg,kp5); | |
fe4da5cc | 1299 | |
73042f01 | 1300 | bb=TMath::Log(kp3+bb); |
fe4da5cc | 1301 | |
73042f01 | 1302 | return ((Float_t)((kp2-aa-bb)*kp1/aa)); |
fe4da5cc | 1303 | } |
73042f01 | 1304 | |
1305 |