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c28632f0 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/*
17 $Log$
64e9b5aa 18 Revision 1.4 2000/06/13 13:13:40 jbarbosa
19 Correcting previous correction...
20
bef02574 21 Revision 1.3 2000/06/13 13:06:38 jbarbosa
22 Fixed compiling error for HP (multiple declaration)
23
7f36f6bc 24 Revision 1.2 2000/06/12 15:36:16 jbarbosa
25 Cleaned up version.
26
237c933d 27 Revision 1.1 2000/06/09 15:00:31 jbarbosa
28 New full version. All parameters configurable.
29
c28632f0 30 Revision 1.9 2000/05/31 08:19:38 jbarbosa
31 Fixed bug in StepManager
32
33 Revision 1.8 2000/05/26 17:30:08 jbarbosa
34 Cerenkov angle now stored within cerenkov data structure.
35
36 Revision 1.7 2000/05/18 10:31:36 jbarbosa
37 Fixed positioning of spacers inside freon.
38 Fixed positioning of proximity gap
39 inside methane.
40 Fixed cut on neutral particles in the StepManager.
41
42 Revision 1.6 2000/04/28 11:51:58 morsch
43 Dimensions of arrays hits and Ckov_data corrected.
44
45 Revision 1.5 2000/04/19 13:28:46 morsch
46 Major changes in geometry (parametrised), materials (updated) and
47 step manager (diagnostics) (JB, AM)
48
49*/
50
51
52
53//////////////////////////////////////////////////////////
54// Manager and hits classes for set: RICH full version //
55//////////////////////////////////////////////////////////
56
57#include <TTUBE.h>
58#include <TNode.h>
59#include <TRandom.h>
237c933d 60#include <TParticle.h>
c28632f0 61
62#include "AliRICHv1.h"
237c933d 63#include "AliRICHHit.h"
64e9b5aa 64#include "AliRICHSegmentation.h"
65#include "AliRICHResponse.h"
66#include "AliRICHSegmentationV0.h"
67#include "AliRICHResponseV0.h"
68#include "AliRICHGeometry.h"
c28632f0 69#include "AliRun.h"
70#include "AliMC.h"
71#include "iostream.h"
72#include "AliCallf77.h"
73#include "AliConst.h"
74#include "AliPDG.h"
75#include "TGeant3.h"
76
77ClassImp(AliRICHv1)
78
79//___________________________________________
80AliRICHv1::AliRICHv1() : AliRICHv0()
81{
237c933d 82
83// Default constructor fo AliRICHvv1 (full version)
84
c28632f0 85 //fChambers = 0;
86}
87
88//___________________________________________
89AliRICHv1::AliRICHv1(const char *name, const char *title)
90 : AliRICHv0(name,title)
91{
c28632f0 92
237c933d 93// Full version of RICH with hits and diagnostics
94
64e9b5aa 95 // Version 0
96// Default Segmentation, no hits
97 AliRICHSegmentationV0* segmentationV0 = new AliRICHSegmentationV0;
98//
99// Segmentation parameters
100 segmentationV0->SetPadSize(0.84,0.80);
101 segmentationV0->SetDAnod(0.84/2);
102//
103// Geometry parameters
104 AliRICHGeometry* geometry = new AliRICHGeometry;
105 geometry->SetGapThickness(8);
106 geometry->SetProximityGapThickness(.4);
107 geometry->SetQuartzLength(131);
108 geometry->SetQuartzWidth(126.2);
109 geometry->SetQuartzThickness(.5);
110 geometry->SetOuterFreonLength(131);
111 geometry->SetOuterFreonWidth(40.3);
112 geometry->SetInnerFreonLength(131);
113 geometry->SetInnerFreonWidth(40.3);
114 geometry->SetFreonThickness(1);
115//
116// Response parameters
117 AliRICHResponseV0* responseV0 = new AliRICHResponseV0;
118 responseV0->SetSigmaIntegration(5.);
119 responseV0->SetChargeSlope(40.);
120 responseV0->SetChargeSpread(0.18, 0.18);
121 responseV0->SetMaxAdc(1024);
122 responseV0->SetAlphaFeedback(0.05);
123 responseV0->SetEIonisation(26.e-9);
124 responseV0->SetSqrtKx3(0.77459667);
125 responseV0->SetKx2(0.962);
126 responseV0->SetKx4(0.379);
127 responseV0->SetSqrtKy3(0.77459667);
128 responseV0->SetKy2(0.962);
129 responseV0->SetKy4(0.379);
130 responseV0->SetPitch(0.25);
131//
132//
133// AliRICH *RICH = (AliRICH *) gAlice->GetDetector("RICH");
134
237c933d 135 fCkovNumber=0;
136 fFreonProd=0;
64e9b5aa 137 Int_t i=0;
c28632f0 138
64e9b5aa 139 fChambers = new TObjArray(kNCH);
140 for (i=0; i<kNCH; i++) {
141
142 (*fChambers)[i] = new AliRICHChamber();
143
c28632f0 144 }
64e9b5aa 145
146 for (i=0; i<kNCH; i++) {
147 SetGeometryModel(i,geometry);
148 SetSegmentationModel(i, segmentationV0);
149 SetResponseModel(i, responseV0);
150 SetNsec(i,1);
151 SetDebugLevel(0);
152 }
153
154
c28632f0 155}
156
237c933d 157void AliRICHv1::Init()
158{
159
160 printf("*********************************** RICH_INIT ***********************************\n");
161 printf("* *\n");
64e9b5aa 162 printf("* AliRICHv1 Full version started *\n");
237c933d 163 printf("* *\n");
164
165
166 AliRICHSegmentation* segmentation;
167 AliRICHGeometry* geometry;
168 AliRICHResponse* response;
169
170
171 //
172 // Initialize Tracking Chambers
173 //
bef02574 174 for (Int_t i=1; i<kNCH; i++) {
237c933d 175 //printf ("i:%d",i);
176 ( (AliRICHChamber*) (*fChambers)[i])->Init();
177 }
178
179 //
180 // Set the chamber (sensitive region) GEANT identifier
181
182 ((AliRICHChamber*)(*fChambers)[0])->SetGid(1);
183 ((AliRICHChamber*)(*fChambers)[1])->SetGid(2);
184 ((AliRICHChamber*)(*fChambers)[2])->SetGid(3);
185 ((AliRICHChamber*)(*fChambers)[3])->SetGid(4);
186 ((AliRICHChamber*)(*fChambers)[4])->SetGid(5);
187 ((AliRICHChamber*)(*fChambers)[5])->SetGid(6);
188 ((AliRICHChamber*)(*fChambers)[6])->SetGid(7);
189
190 Float_t pos1[3]={0,471.8999,165.2599};
191 Chamber(0).SetChamberTransform(pos1[0],pos1[1],pos1[2],new TRotMatrix("rot993","rot993",90,0,70.69,90,19.30999,-90));
192
193 Float_t pos2[3]={171,470,0};
194 Chamber(1).SetChamberTransform(pos2[0],pos2[1],pos2[2],new TRotMatrix("rot994","rot994",90,-20,90,70,0,0));
195
196 Float_t pos3[3]={0,500,0};
197 Chamber(2).SetChamberTransform(pos3[0],pos3[1],pos3[2],new TRotMatrix("rot995","rot995",90,0,90,90,0,0));
198
199 Float_t pos4[3]={-171,470,0};
200 Chamber(3).SetChamberTransform(pos4[0],pos4[1],pos4[2], new TRotMatrix("rot996","rot996",90,20,90,110,0,0));
201
202 Float_t pos5[3]={161.3999,443.3999,-165.3};
203 Chamber(4).SetChamberTransform(pos5[0],pos5[1],pos5[2],new TRotMatrix("rot997","rot997",90,340,108.1999,70,18.2,70));
204
205 Float_t pos6[3]={0., 471.9, -165.3,};
206 Chamber(5).SetChamberTransform(pos6[0],pos6[1],pos6[2],new TRotMatrix("rot998","rot998",90,0,109.3099,90,19.30999,90));
207
208 Float_t pos7[3]={-161.399,443.3999,-165.3};
209 Chamber(6).SetChamberTransform(pos7[0],pos7[1],pos7[2],new TRotMatrix("rot999","rot999",90,20,108.1999,110,18.2,110));
210
211 segmentation=Chamber(0).GetSegmentationModel(0);
212 geometry=Chamber(0).GetGeometryModel();
213 response=Chamber(0).GetResponseModel();
214
215
216 printf("* Pads : %3dx%3d *\n",segmentation->Npx(),segmentation->Npy());
217 printf("* Pad size : %5.2f x%5.2f mm2 *\n",segmentation->Dpx(),segmentation->Dpy());
64e9b5aa 218 printf("* Gap Thickness : %5.1f cm *\n",geometry->GetGapThickness());
219 printf("* Radiator Width : %5.1f cm *\n",geometry->GetQuartzWidth());
220 printf("* Radiator Length : %5.1f cm *\n",geometry->GetQuartzLength());
221 printf("* Freon Thickness : %5.1f cm *\n",geometry->GetFreonThickness());
237c933d 222 printf("* Charge Slope : %5.1f ADC *\n",response->ChargeSlope());
64e9b5aa 223 printf("* Feedback Prob. : %5.2f %% *\n",response->AlphaFeedback()*100);
224 printf("* Debug Level : %3d *\n",GetDebugLevel());
237c933d 225 printf("* *\n");
226 printf("* Success! *\n");
227 printf("* *\n");
228 printf("*********************************************************************************\n");
229
230}
c28632f0 231
232//___________________________________________
233void AliRICHv1::StepManager()
234{
237c933d 235
236// Full Step Manager
237
c28632f0 238 Int_t copy, id;
239 static Int_t idvol;
240 static Int_t vol[2];
241 Int_t ipart;
242 static Float_t hits[18];
237c933d 243 static Float_t ckovData[19];
244 TLorentzVector position;
245 TLorentzVector momentum;
c28632f0 246 Float_t pos[3];
247 Float_t mom[4];
237c933d 248 Float_t localPos[3];
249 Float_t localMom[4];
250 Float_t localTheta,localPhi;
c28632f0 251 Float_t theta,phi;
252 Float_t destep, step;
253 Float_t ranf[2];
237c933d 254 Int_t nPads;
c28632f0 255 Float_t coscerenkov;
256 static Float_t eloss, xhit, yhit, tlength;
237c933d 257 const Float_t kBig=1.e10;
c28632f0 258
259 TClonesArray &lhits = *fHits;
260 TGeant3 *geant3 = (TGeant3*) gMC;
261 TParticle *current = (TParticle*)(*gAlice->Particles())[gAlice->CurrentTrack()];
262
263 //if (current->Energy()>1)
264 //{
265
266 // Only gas gap inside chamber
267 // Tag chambers and record hits when track enters
268
269 idvol=-1;
270 id=gMC->CurrentVolID(copy);
237c933d 271 Float_t cherenkovLoss=0;
c28632f0 272 //gAlice->KeepTrack(gAlice->CurrentTrack());
273
237c933d 274 gMC->TrackPosition(position);
275 pos[0]=position(0);
276 pos[1]=position(1);
277 pos[2]=position(2);
278 ckovData[1] = pos[0]; // X-position for hit
279 ckovData[2] = pos[1]; // Y-position for hit
280 ckovData[3] = pos[2]; // Z-position for hit
281 //ckovData[11] = gAlice->CurrentTrack();
c28632f0 282
283 //AliRICH *RICH = (AliRICH *) gAlice->GetDetector("RICH");
284
285 /********************Store production parameters for Cerenkov photons************************/
286//is it a Cerenkov photon?
287 if (gMC->TrackPid() == 50000050) {
288
289 //if (gMC->VolId("GAP ")==gMC->CurrentVolID(copy))
290 //{
237c933d 291 Float_t ckovEnergy = current->Energy();
c28632f0 292 //energy interval for tracking
237c933d 293 if (ckovEnergy > 5.6e-09 && ckovEnergy < 7.8e-09 )
294 //if (ckovEnergy > 0)
c28632f0 295 {
296 if (gMC->IsTrackEntering()){ //is track entering?
297 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
298 { //is it in freo?
299 if (geant3->Gctrak()->nstep<1){ //is it the first step?
300 Int_t mother = current->GetFirstMother();
301
302 //printf("Second Mother:%d\n",current->GetSecondMother());
303
237c933d 304 ckovData[10] = mother;
305 ckovData[11] = gAlice->CurrentTrack();
306 ckovData[12] = 1; //Media where photon was produced 1->Freon, 2->Quarz
307 fCkovNumber++;
308 fFreonProd=1;
309 //printf("Index: %d\n",fCkovNumber);
c28632f0 310 } //first step question
311 } //freo question
312
313 if (geant3->Gctrak()->nstep<1){ //is it first step?
314 if (gMC->VolId("QUAR")==gMC->CurrentVolID(copy)) //is it in quarz?
315 {
237c933d 316 ckovData[12] = 2;
c28632f0 317 } //quarz question
318 } //first step question
319
237c933d 320 //printf("Before %d\n",fFreonProd);
c28632f0 321 } //track entering question
322
237c933d 323 if (ckovData[12] == 1) //was it produced in Freon?
324 //if (fFreonProd == 1)
c28632f0 325 {
326 if (gMC->IsTrackEntering()){ //is track entering?
327 //printf("Got in");
328 if (gMC->VolId("META")==gMC->CurrentVolID(copy)) //is it in gap?
329 {
330 //printf("Got in\n");
237c933d 331 gMC->TrackMomentum(momentum);
332 mom[0]=momentum(0);
333 mom[1]=momentum(1);
334 mom[2]=momentum(2);
335 mom[3]=momentum(3);
c28632f0 336 // Z-position for hit
337
338
339 /**************** Photons lost in second grid have to be calculated by hand************/
340
341 Float_t cophi = TMath::Cos(TMath::ATan2(mom[0], mom[1]));
342 Float_t t = (1. - .025 / cophi) * (1. - .05 / cophi);
343 gMC->Rndm(ranf, 1);
344 //printf("grid calculation:%f\n",t);
345 if (ranf[0] > t) {
346 //geant3->StopTrack();
237c933d 347 ckovData[13] = 5;
348 AddCerenkov(gAlice->CurrentTrack(),vol,ckovData);
c28632f0 349 //printf("Lost one in grid\n");
350 }
351 /**********************************************************************************/
352 } //gap
353
354 if (gMC->VolId("CSI ")==gMC->CurrentVolID(copy)) //is it in csi?
355 {
237c933d 356 gMC->TrackMomentum(momentum);
357 mom[0]=momentum(0);
358 mom[1]=momentum(1);
359 mom[2]=momentum(2);
360 mom[3]=momentum(3);
c28632f0 361
362 /********* Photons lost by Fresnel reflection have to be calculated by hand********/
363 /***********************Cerenkov phtons (always polarised)*************************/
364
365 Float_t cophi = TMath::Cos(TMath::ATan2(mom[0], mom[1]));
237c933d 366 Float_t t = Fresnel(ckovEnergy*1e9,cophi,1);
c28632f0 367 gMC->Rndm(ranf, 1);
368 if (ranf[0] < t) {
369 //geant3->StopTrack();
237c933d 370 ckovData[13] = 6;
371 AddCerenkov(gAlice->CurrentTrack(),vol,ckovData);
c28632f0 372 //printf("Lost by Fresnel\n");
373 }
374 /**********************************************************************************/
375 }
376 } //track entering?
377
378
379 /********************Evaluation of losses************************/
380 /******************still in the old fashion**********************/
381
382 Int_t i1 = geant3->Gctrak()->nmec; //number of physics mechanisms acting on the particle
383 for (Int_t i = 0; i < i1; ++i) {
384 // Reflection loss
385 if (geant3->Gctrak()->lmec[i] == 106) { //was it reflected
237c933d 386 ckovData[13]=10;
c28632f0 387 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
237c933d 388 ckovData[13]=1;
c28632f0 389 if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
237c933d 390 ckovData[13]=2;
c28632f0 391 //geant3->StopTrack();
237c933d 392 AddCerenkov(gAlice->CurrentTrack(),vol,ckovData);
c28632f0 393 } //reflection question
394
395
396 // Absorption loss
397 else if (geant3->Gctrak()->lmec[i] == 101) { //was it absorbed?
237c933d 398 ckovData[13]=20;
c28632f0 399 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
237c933d 400 ckovData[13]=11;
c28632f0 401 if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
237c933d 402 ckovData[13]=12;
c28632f0 403 if (gMC->CurrentVolID(copy) == gMC->VolId("META"))
237c933d 404 ckovData[13]=13;
c28632f0 405 if (gMC->CurrentVolID(copy) == gMC->VolId("GAP "))
237c933d 406 ckovData[13]=13;
c28632f0 407
408 if (gMC->CurrentVolID(copy) == gMC->VolId("SRIC"))
237c933d 409 ckovData[13]=15;
c28632f0 410
411 // CsI inefficiency
412 if (gMC->CurrentVolID(copy) == gMC->VolId("CSI ")) {
237c933d 413 ckovData[13]=16;
c28632f0 414 }
415 //geant3->StopTrack();
237c933d 416 AddCerenkov(gAlice->CurrentTrack(),vol,ckovData);
417 //printf("Added cerenkov %d\n",fCkovNumber);
c28632f0 418 } //absorption question
419
420
421 // Photon goes out of tracking scope
422 else if (geant3->Gctrak()->lmec[i] == 30) { //is it below energy treshold?
237c933d 423 ckovData[13]=21;
c28632f0 424 //geant3->StopTrack();
237c933d 425 AddCerenkov(gAlice->CurrentTrack(),vol,ckovData);
c28632f0 426 } // energy treshold question
427 } //number of mechanisms cycle
428 /**********************End of evaluation************************/
429 } //freon production question
430 } //energy interval question
431 //}//inside the proximity gap question
432 } //cerenkov photon question
433
434 /**************************************End of Production Parameters Storing*********************/
435
436
437 /*******************************Treat photons that hit the CsI (Ckovs and Feedbacks)************/
438
439 if (gMC->TrackPid() == 50000050 || gMC->TrackPid() == 50000051) {
440 //printf("Cerenkov\n");
441 if (gMC->VolId("CSI ")==gMC->CurrentVolID(copy))
442 {
443
444 if (gMC->Edep() > 0.){
237c933d 445 gMC->TrackPosition(position);
446 gMC->TrackMomentum(momentum);
447 pos[0]=position(0);
448 pos[1]=position(1);
449 pos[2]=position(2);
450 mom[0]=momentum(0);
451 mom[1]=momentum(1);
452 mom[2]=momentum(2);
453 mom[3]=momentum(3);
c28632f0 454 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
455 Double_t rt = TMath::Sqrt(tc);
456 theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
457 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
237c933d 458 gMC->Gmtod(pos,localPos,1);
459 gMC->Gmtod(mom,localMom,2);
c28632f0 460
461 gMC->CurrentVolOffID(2,copy);
462 vol[0]=copy;
463 idvol=vol[0]-1;
464
465 //Int_t sector=((AliRICHChamber*) (*fChambers)[idvol])
237c933d 466 //->Sector(localPos[0], localPos[2]);
c28632f0 467 //printf("Sector:%d\n",sector);
468
469 /*if (gMC->TrackPid() == 50000051){
470 fFeedbacks++;
471 printf("Feedbacks:%d\n",fFeedbacks);
472 }*/
473
474 ((AliRICHChamber*) (*fChambers)[idvol])
237c933d 475 ->SigGenInit(localPos[0], localPos[2], localPos[1]);
476 if(idvol<kNCH) {
477 ckovData[0] = gMC->TrackPid(); // particle type
478 ckovData[1] = pos[0]; // X-position for hit
479 ckovData[2] = pos[1]; // Y-position for hit
480 ckovData[3] = pos[2]; // Z-position for hit
481 ckovData[4] = theta; // theta angle of incidence
482 ckovData[5] = phi; // phi angle of incidence
483 ckovData[8] = (Float_t) fNPadHits; // first padhit
484 ckovData[9] = -1; // last pad hit
485 ckovData[13] = 4; // photon was detected
486 ckovData[14] = mom[0];
487 ckovData[15] = mom[1];
488 ckovData[16] = mom[2];
c28632f0 489
490 destep = gMC->Edep();
237c933d 491 gMC->SetMaxStep(kBig);
492 cherenkovLoss += destep;
493 ckovData[7]=cherenkovLoss;
c28632f0 494
237c933d 495 nPads = MakePadHits(localPos[0],localPos[2],cherenkovLoss,idvol,kCerenkov);
496 if (fNPadHits > (Int_t)ckovData[8]) {
497 ckovData[8]= ckovData[8]+1;
498 ckovData[9]= (Float_t) fNPadHits;
c28632f0 499 }
500
237c933d 501 ckovData[17] = nPads;
502 //printf("nPads:%d",nPads);
c28632f0 503
504 //TClonesArray *Hits = RICH->Hits();
505 AliRICHHit *mipHit = (AliRICHHit*) (fHits->UncheckedAt(0));
506 if (mipHit)
507 {
508 mom[0] = current->Px();
509 mom[1] = current->Py();
510 mom[2] = current->Pz();
237c933d 511 Float_t mipPx = mipHit->fMomX;
512 Float_t mipPy = mipHit->fMomY;
513 Float_t mipPz = mipHit->fMomZ;
c28632f0 514
515 Float_t r = mom[0]*mom[0] + mom[1]*mom[1] + mom[2]*mom[2];
516 Float_t rt = TMath::Sqrt(r);
237c933d 517 Float_t mipR = mipPx*mipPx + mipPy*mipPy + mipPz*mipPz;
518 Float_t mipRt = TMath::Sqrt(mipR);
519 if ((rt*mipRt) > 0)
c28632f0 520 {
237c933d 521 coscerenkov = (mom[0]*mipPx + mom[1]*mipPy + mom[2]*mipPz)/(rt*mipRt);
c28632f0 522 }
523 else
524 {
525 coscerenkov = 0;
526 }
527 Float_t cherenkov = TMath::ACos(coscerenkov);
237c933d 528 ckovData[18]=cherenkov;
c28632f0 529 }
530 //if (sector != -1)
531 //{
237c933d 532 AddHit(gAlice->CurrentTrack(),vol,ckovData);
533 AddCerenkov(gAlice->CurrentTrack(),vol,ckovData);
c28632f0 534 //}
535 }
536 }
537 }
538 }
539
540 /***********************************************End of photon hits*********************************************/
541
542
543 /**********************************************Charged particles treatment*************************************/
544
545 else if (gMC->TrackCharge())
546 //else if (1 == 1)
547 {
548//If MIP
549 /*if (gMC->IsTrackEntering())
550 {
551 hits[13]=20;//is track entering?
552 }*/
553 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
554 {
237c933d 555 fFreonProd=1;
c28632f0 556 }
557
558 if (gMC->VolId("GAP ")== gMC->CurrentVolID(copy)) {
559// Get current particle id (ipart), track position (pos) and momentum (mom)
560
561 gMC->CurrentVolOffID(3,copy);
562 vol[0]=copy;
563 idvol=vol[0]-1;
564
565 //Int_t sector=((AliRICHChamber*) (*fChambers)[idvol])
237c933d 566 //->Sector(localPos[0], localPos[2]);
c28632f0 567 //printf("Sector:%d\n",sector);
568
237c933d 569 gMC->TrackPosition(position);
570 gMC->TrackMomentum(momentum);
571 pos[0]=position(0);
572 pos[1]=position(1);
573 pos[2]=position(2);
574 mom[0]=momentum(0);
575 mom[1]=momentum(1);
576 mom[2]=momentum(2);
577 mom[3]=momentum(3);
578 gMC->Gmtod(pos,localPos,1);
579 gMC->Gmtod(mom,localMom,2);
c28632f0 580
581 ipart = gMC->TrackPid();
582 //
583 // momentum loss and steplength in last step
584 destep = gMC->Edep();
585 step = gMC->TrackStep();
586
587 //
588 // record hits when track enters ...
589 if( gMC->IsTrackEntering()) {
590// gMC->SetMaxStep(fMaxStepGas);
591 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
592 Double_t rt = TMath::Sqrt(tc);
593 theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
594 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
595
596
237c933d 597 Double_t localTc = localMom[0]*localMom[0]+localMom[2]*localMom[2];
598 Double_t localRt = TMath::Sqrt(localTc);
599 localTheta = Float_t(TMath::ATan2(localRt,Double_t(localMom[1])))*kRaddeg;
600 localPhi = Float_t(TMath::ATan2(Double_t(localMom[2]),Double_t(localMom[0])))*kRaddeg;
c28632f0 601
602 hits[0] = Float_t(ipart); // particle type
237c933d 603 hits[1] = localPos[0]; // X-position for hit
604 hits[2] = localPos[1]; // Y-position for hit
605 hits[3] = localPos[2]; // Z-position for hit
606 hits[4] = localTheta; // theta angle of incidence
607 hits[5] = localPhi; // phi angle of incidence
c28632f0 608 hits[8] = (Float_t) fNPadHits; // first padhit
609 hits[9] = -1; // last pad hit
237c933d 610 hits[13] = fFreonProd; // did id hit the freon?
c28632f0 611 hits[14] = mom[0];
612 hits[15] = mom[1];
613 hits[16] = mom[2];
614
615 tlength = 0;
616 eloss = 0;
237c933d 617 fFreonProd = 0;
c28632f0 618
237c933d 619 Chamber(idvol).LocaltoGlobal(localPos,hits+1);
c28632f0 620
621
237c933d 622 //To make chamber coordinates x-y had to pass localPos[0], localPos[2]
623 xhit = localPos[0];
624 yhit = localPos[2];
c28632f0 625 // Only if not trigger chamber
237c933d 626 if(idvol<kNCH) {
c28632f0 627 //
628 // Initialize hit position (cursor) in the segmentation model
629 ((AliRICHChamber*) (*fChambers)[idvol])
237c933d 630 ->SigGenInit(localPos[0], localPos[2], localPos[1]);
c28632f0 631 }
632 }
633
634 //
635 // Calculate the charge induced on a pad (disintegration) in case
636 //
637 // Mip left chamber ...
638 if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
237c933d 639 gMC->SetMaxStep(kBig);
c28632f0 640 eloss += destep;
641 tlength += step;
642
643
644 // Only if not trigger chamber
237c933d 645 if(idvol<kNCH) {
c28632f0 646 if (eloss > 0)
647 {
648 if(gMC->TrackPid() == kNeutron)
649 printf("\n\n\n\n\n Neutron Making Pad Hit!!! \n\n\n\n");
237c933d 650 nPads = MakePadHits(xhit,yhit,eloss,idvol,kMip);
651 hits[17] = nPads;
652 //printf("nPads:%d",nPads);
c28632f0 653 }
654 }
655
656 hits[6]=tlength;
657 hits[7]=eloss;
658 if (fNPadHits > (Int_t)hits[8]) {
659 hits[8]= hits[8]+1;
660 hits[9]= (Float_t) fNPadHits;
661 }
662
663 //if(sector !=-1)
664 new(lhits[fNhits++]) AliRICHHit(fIshunt,gAlice->CurrentTrack(),vol,hits);
665 eloss = 0;
666 //
667 // Check additional signal generation conditions
668 // defined by the segmentation
669 // model (boundary crossing conditions)
670 } else if
671 (((AliRICHChamber*) (*fChambers)[idvol])
237c933d 672 ->SigGenCond(localPos[0], localPos[2], localPos[1]))
c28632f0 673 {
674 ((AliRICHChamber*) (*fChambers)[idvol])
237c933d 675 ->SigGenInit(localPos[0], localPos[2], localPos[1]);
c28632f0 676 if (eloss > 0)
677 {
678 if(gMC->TrackPid() == kNeutron)
679 printf("\n\n\n\n\n Neutron Making Pad Hit!!! \n\n\n\n");
237c933d 680 nPads = MakePadHits(xhit,yhit,eloss,idvol,kMip);
681 hits[17] = nPads;
c28632f0 682 //printf("Npads:%d",NPads);
683 }
237c933d 684 xhit = localPos[0];
685 yhit = localPos[2];
c28632f0 686 eloss = destep;
687 tlength += step ;
688 //
689 // nothing special happened, add up energy loss
690 } else {
691 eloss += destep;
692 tlength += step ;
693 }
694 }
695 }
696 /*************************************************End of MIP treatment**************************************/
697 //}
698}