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dc7ca31d 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
16/* $Id$ */
17
18/////////////////////////////////////////////////////////////////////
19// //
20// T0 ( T-zero) detector version 0 //
21//
22//Begin Html
23/*
24<img src="gif/AliT0v2Class.gif">
25*/
26//End Html
27// //
28// //
29//////////////////////////////////////////////////////////////////////
30
31#define RIGHT_ARRAY 1
32#define LEFT_ARRAY 2
33
34#include <Riostream.h>
35#include <stdlib.h>
36
37#include <TGeometry.h>
38#include <TLorentzVector.h>
39#include <TMath.h>
40#include <TNode.h>
41#include <TTUBE.h>
42#include <TVirtualMC.h>
43
44#include "AliMagF.h"
45#include "AliRun.h"
46#include "AliT0hit.h"
47#include "AliT0v2.h"
48#include "AliMC.h"
49//#include "AliT0hitPhoton.h"
50//#include "TGeant3.h"
51
52ClassImp(AliT0v2)
53
54
55//////////////////////////////////////////////////////////////////////
56// Standart constructor for T0 Detector version 2
57//////////////////////////////////////////////////////////////////////
58AliT0v2::AliT0v2(const char *name, const char *title):
59 AliT0(name,title)
60{
61 fIdSens1 = 0;
62// setBufferSize(128000);
63}
64
65
66//////////////////////////////////////////////////////////////////////
67// Create the geometry of T0 Detector version 2
68//////////////////////////////////////////////////////////////////////
69void AliT0v2::CreateGeometry()
70{
71 /*
72 <img src="gif/AliT0v2.gif">
73 */
74
75 Int_t *idtmed;
76 Int_t idrotm[999];
77 Int_t i, j;
78 Float_t x, y, z;
79 Float_t zRight;
80 Float_t zLeft;
81 Float_t phi[3];
82 Float_t theta;
83 Double_t angel;
84
85 Float_t pstart[3] = {4.5, 10.7, 5.3};
86 Float_t pinstart[3] = {0., 1.31, 5.25};
87 Float_t ppmt[3] = {0., 1.31, 3.5};
88 Float_t ptop[3] = {0., 1.3, 1.5};
89// Float_t preg[3] = {0., 1.3, 0.005};
90 Float_t preg[3] = {0., 0.875, 0.005};
91 Float_t pdes[3] = {0.875, 1.3, 0.005};
92
93
94 zRight = 75.;
95 zLeft = 350.;
96 theta = (180 / TMath::Pi()) * TMath::ATan(6.5 / zRight);
97 angel = 2 * TMath::Pi() / 12;
98 idtmed = fIdtmed->GetArray();
99
100
101 AliMatrix (idrotm[901], 90., 0., 90., 90., 180., 0.);
102
103 gMC->Gsvolu ("0RST", "TUBE", idtmed[3], pstart, 3);
104 gMC->Gsvolu ("0LST", "TUBE", idtmed[3], pstart, 3);
105 gMC->Gspos ("0RST", 1, "ALIC", 0., 0., -zRight, 0, "ONLY");
106 gMC->Gspos ("0LST", 1, "ALIC", 0., 0., zLeft, idrotm[901], "ONLY");
107
108// 12 unit: PMT + divider
109 gMC->Gsvolu("0INS", "TUBE", idtmed[3], pinstart, 3);
110 z = 0;
111 for (i = 0; i < 12; i++)
112 {
113 x = 6.5 * TMath::Sin(i * angel);
114 y = 6.5 * TMath::Cos(i * angel);
115
116 phi[0] = -30 * i;
117 phi[1] = 90 - i * 30;
118 phi[2] = 90 - i * 30;
119 for (j = 0; j < 3; j++)
120 if (phi[j] < 0) phi[j] += 360;
121
122 AliMatrix (idrotm[902 + i], 90., phi[0],
123 90. + theta, phi[1],
124 theta, phi[2]);
125
126 gMC->Gspos ("0INS", i + 1, "0RST", x, y, z, idrotm[902 + i], "ONLY");
127 gMC->Gspos ("0INS", i + 13, "0LST", x, y, z, 0, "ONLY");
128 }
129
130 gMC->Gsvolu ("0PMT", "TUBE", idtmed[1], ppmt, 3);
131 x = y = 0;
132 z = -pinstart[2] + ppmt[2];
133 gMC->Gspos ("0PMT", 1, "0INS", x, y, z, 0, "ONLY");
134
135// PMT
136 // Entry window (glass)
137 gMC->Gsvolu ("0TOP", "TUBE", idtmed[6], ptop, 3);
138 z = -ppmt[2] + ptop[2];
139 gMC->Gspos ("0TOP", 1, "0PMT", 0, 0, z, 0, "ONLY");
140
141 gMC->Gsvolu ("0REG", "TUBE", idtmed[6], preg, 3);
142 z = -ppmt[2] + 2 * ptop[2] + preg[2];
143 gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY");
144
145 gMC->Gsvolu ("0DES", "TUBE", idtmed[6], pdes, 3);
146 z = -ppmt[2] + 2 * ptop[2] + preg[2];
147 gMC->Gspos ("0DES", 1, "0PMT", 0, 0, z, 0, "ONLY");
148}
149
150
151//////////////////////////////////////////////////////////////////////
152// Definition of avaible T0 materials
153//////////////////////////////////////////////////////////////////////
154void AliT0v2::CreateMaterials()
155{
156 Int_t isxfld = gAlice->Field()->Integ();
157 Float_t sxmgmx = gAlice->Field()->Max();
158
159 Float_t a, z, d, radl, absl, buf[1];
160 Int_t nbuf;
161
162// Scintillator CH
163 Float_t ascin[2] = {1.01, 12.01};
164 Float_t zscin[2] = {1., 6.};
165 Float_t wscin[2] = {1., 1.};
166 Float_t denscin = 1.03;
167
168// PMT glass SiO2
169 Float_t aglass[2] = {28.0855, 15.9994};
170 Float_t zglass[2] = {14., 8.};
171 Float_t wglass[2] = { 1., 2.};
172 Float_t dglass = 2.65;
173
174// Ceramic 97.2% Al2O3 , 2.8% SiO2
175 Float_t acer[2], zcer[2];
176 Float_t wcer[2] = { 0.972, 0.028};
177 Float_t aal2o3[2] = {26.981539, 15.9994 };
178 Float_t zal2o3[2] = {13., 8.};
179 Float_t wal2o3[2] = { 2., 3.};
180 Float_t denscer = 3.6;
181
182// Brass 80% Cu, 20% Zn
183 Float_t abrass[2] = {63.546, 65.39};
184 Float_t zbrass[2] = {29., 30.};
185 Float_t wbrass[2] = { 0.8, 0.2};
186 Float_t denbrass = 8.96;
187
188//Ribber C6H12S
189 Float_t aribber[3] = {12., 1., 32.};
190 Float_t zribber[3] = { 6., 1., 16.};
191 Float_t wribber[3] = { 6., 12., 1.};
192 Float_t denribber = 0.8;
193
194// Definition Cherenkov parameters
195 const Int_t NUMENTRIES = 32;
196
197 Float_t ppckov[NUMENTRIES] =
198 { 2.034E-9, 2.068E-9, 2.103E-9, 2.139E-9,
199 2.177E-9, 2.216E-9, 2.256E-9, 2.298E-9,
200 2.341E-9, 2.386E-9, 2.433E-9, 2.481E-9,
201 2.532E-9, 2.585E-9, 2.640E-9, 2.697E-9,
202 2.757E-9, 2.820E-9, 2.885E-9, 2.954E-9,
203 3.026E-9, 3.102E-9, 3.181E-9, 3.265E-9,
204 3.353E-9, 3.446E-9, 3.545E-9, 3.649E-9,
205 3.760E-9, 3.877E-9, 4.002E-9, 4.136E-9 };
206
207 Float_t rindex_qwarz[NUMENTRIES] =
208 { 1.458, 1.458, 1.458, 1.458, 1.458, 1.458, 1.458,
209 1.458, 1.458, 1.458, 1.458, 1.458, 1.458, 1.458,
210 1.458, 1.458, 1.458, 1.458, 1.458, 1.458, 1.458,
211 1.458, 1.458, 1.458, 1.458, 1.458, 1.458, 1.458,
212 1.458, 1.458, 1.458, 1.458 };
213
214 Float_t rindex_air[NUMENTRIES] =
215 { 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.,
216 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.,
217 1., 1., 1., 1. };
218
219 Float_t effic_all[NUMENTRIES] =
220 { 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.,
221 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.,
222 1., 1., 1., 1. };
223
224 Float_t absor_qwarz[NUMENTRIES] =
225 { 2000., 2000., 2000., 2000., 2000., 2000., 2000.,
226 2000., 2000., 2000., 2000., 2000., 2000., 2000.,
227 2000., 2000., 2000., 2000., 2000., 2000., 2000.,
228 2000., 2000., 2000., 2000., 2000., 2000., 2000.,
229 2000., 2000., 2000., 2000. };
230
231 Float_t absor_air[NUMENTRIES] =
232 { 200., 200., 200., 200., 200., 200., 200.,
233 200., 200., 200., 200., 200., 200., 200.,
234 200., 200., 200., 200., 200., 200., 200.,
235 200., 200., 200., 200., 200., 200., 200.,
236 200., 200., 200., 200. };
237
238 Int_t *idtmed = fIdtmed->GetArray();
239
240
241 AliMaterial (0, "T0 Steel$", 55.850, 26., 7.87, 1.76, 999);
242 AliMaterial (1, "T0 Vacuum$", 1.e-16, 1.e-16, 1.e-16, 1.e16, 999);
243 AliMaterial (2, "T0 Air$", 14.61, 7.3, .001205, 30423., 999);
244
245 AliMixture (3, "Al2O3 $", aal2o3, zal2o3, denscer, -2, wal2o3);
246 AliMixture (4, "PMT glass $", aglass, zglass, dglass, -2, wglass);
247 char namate[21]="";
248 gMC->Gfmate ((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
249 acer[0] = a;
250 zcer[0] = z;
251 gMC->Gfmate ((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
252 acer[1] = a;
253 zcer[1] = z;
254
255 AliMixture (5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
256 AliMixture (6, "Brass $", abrass, zbrass, denbrass, 2, wbrass);
257 AliMixture (7, "Ribber $",aribber,zribber,denribber,-3,wribber);
258 AliMixture (9, "Ceramic $", acer, zcer, denscer, 2, wcer);
259
260 AliMedium (1, "T0 Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
261 AliMedium (2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
262 AliMedium (3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
263 AliMedium (4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
264 AliMedium (6, "Glass$", 4, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
265 AliMedium (8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
266 AliMedium (9, "Ribber $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
267 AliMedium(11, "Brass $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
268
269 gMC->SetCerenkov (idtmed[6], NUMENTRIES, ppckov, absor_qwarz, effic_all, rindex_qwarz);
270 gMC->SetCerenkov (idtmed[1], NUMENTRIES, ppckov, absor_air, effic_all, rindex_air);
271}
272
273
274//////////////////////////////////////////////////////////////////////
275// Draw a shaded view of the Forward multiplicity detector version 2
276//////////////////////////////////////////////////////////////////////
277void AliT0v2::DrawModule() const
278{
279 //Set ALIC mother transparent
280 gMC->Gsatt ("ALIC", "SEEN", 0);
281
282 //Set volumes visible
283 gMC->Gsatt ("0STA", "SEEN", 0);
284 gMC->Gsatt ("0PMT", "SEEN", 1);
285 gMC->Gsatt ("0DIV", "SEEN", 1);
286
287 gMC->Gdopt ("hide", "on");
288 gMC->Gdopt ("shad", "on");
289 gMC->SetClipBox (".");
290 gMC->SetClipBox ("*", 0, 1000, -1000, 1000, -1000, 1000);
291 gMC->DefaultRange();
292 gMC->Gdraw ("alic", 40, 30, 0, 12, 9.5, 0.7, 0.7);
293 gMC->Gdhead (1111, "T-Zero detector");
294 gMC->Gdopt ("hide", "off");
295}
296
297
298//////////////////////////////////////////////////////////////////////
299// Initialises version 2 of the Forward Multiplicity Detector
300//////////////////////////////////////////////////////////////////////
301void AliT0v2::Init()
302{
303//Int_t *idtmed = gAlice->Idtmed();
304
305 AliT0::Init();
306 fIdSens1 = gMC->VolId ("0REG");
307
308 printf ("*** T0 version 2 initialized ***\n");
309}
310
311
312//////////////////////////////////////////////////////////////////////
313// Called for every step in the T0 Detector
314//////////////////////////////////////////////////////////////////////
315void AliT0v2::StepManager()
316{
317 Int_t id;
318 Int_t copy;
319// Int_t copy1;
320 Float_t xyz[3];
321 Float_t XYZ[3];
322 Float_t hitPhoton[6];
323 static Float_t hits[7];
324 static Float_t edep;
325 static Int_t vol[2];
326 TLorentzVector pos;
327 TLorentzVector mom;
328
329
330 if(!gMC->IsTrackAlive()) return; // particle has disappeared
331
332// TGeant3 *g3 = (TGeant3*) gMC;
333// g3->Gpcxyz();
334
335 TClonesArray &lhits = *fHits;
336
337
338///////////////////////////////////////////////
339// If particles is photon then ...
340
341 if (gMC->TrackPid() == 50000050)
342 {
343 id = gMC->CurrentVolID(copy);
344
345 // Check the sensetive volume
346 if (id == fIdSens1)
347 {
348 if (gMC->IsTrackEntering())
349 {
350 gMC->CurrentVolOffID(2,copy);
351 if (copy < 13)
352 {
353 vol[0] = RIGHT_ARRAY;
354 vol[1] = copy;
355 }
356 else
357 {
358 vol[0] = LEFT_ARRAY;
359 vol[1] = copy - 12;
360 }
361
362 gMC->TrackPosition(pos);
363 gMC->TrackMomentum(mom);
364 XYZ[0] = pos[0];
365 XYZ[1] = pos[1];
366 XYZ[2] = pos[2];
367 gMC->Gmtod (XYZ, xyz, 1);
368
369 hitPhoton[0] = sqrt (xyz[0] * xyz[0] + xyz[1] * xyz[1]);
370 hitPhoton[1] = mom[0];
371 hitPhoton[2] = mom[1];
372 hitPhoton[3] = mom[2];
373 hitPhoton[4] = 1e9 * gMC->TrackTime();
374 hitPhoton[5] = 1e9 * gMC->Etot();
375
376 AddHitPhoton (gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hitPhoton);
377 }
378 gMC->StopTrack();
379 }
380 else
381 if (id == gMC->VolId ("0DES")) gMC->StopTrack();
382 }
383
384// end photon particalary
385///////////////////////////////////////////////
386
387
388///////////////////////////////////////////////
389// If particles is charge then ...
390
391 // Float_t charge = gMC->TrackCharge();
392 // if(TMath::Abs(charge) <= 0.) return;
393 id = gMC->CurrentVolID(copy);
394
395
396 // printf("gMC->ckine->ipart %d",gMC->ckine->ipart);
397 // Check the sensetive volume
398 if(id==gMC->VolId("0TOP") ) {
399 if(gMC->IsTrackEntering()) {
400 gMC->CurrentVolOffID(2,copy);
401 if (copy < 13)
402 {
403 vol[0] = RIGHT_ARRAY;
404 vol[1] = copy;
405 }
406 else
407 {
408 vol[0] = LEFT_ARRAY;
409 vol[1] = copy - 12;
410 }
411
412 gMC->TrackPosition(pos);
413 hits[0] = pos[0];
414 hits[1] = pos[1];
415 hits[2] = pos[2];
416 Float_t etot = gMC->Etot();
417 hits[4] = etot;
418 Int_t part = gMC->TrackPid();
419 hits[5] = part;
420 Float_t ttime = gMC->TrackTime();
421 hits[6] = ttime*1e9;
422 edep = 0;
423 }
424 if(gMC->IsTrackInside()) {
425 Float_t de = gMC->Edep();
426 edep = edep + de;
427 // printf ("E deposition %f\n",edep);
428 // for (i=0; i<=6; i++){
429 // printf(" HITS on T0 inside %f\n",hits[i]); }
430 }
431 if(gMC->IsTrackExiting()) {
432 Float_t de = gMC->Edep();
433 edep = edep + de;
434 hits[3] = edep * 1e3;
435
436 // for (i=0; i<=6; i++){
437 // printf(" HITS on T0 Exit %f\n",hits[i]); }
438 //for (i=0; i<=1; i++) { printf("T0 vol %d\n",vol[i]);}
439
440 new(lhits[fNhits++]) AliT0hit(fIshunt,gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,hits);
441 }
442 }
443
444// end charge particles particalary
445///////////////////////////////////////////////
446
447}