removed iostream
[u/mrichter/AliRoot.git] / PHOS / AliPHOSv1.cxx
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7587f5a5 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
b2a60966 16/* $Id$ */
5f20d3fb 17
7587f5a5 18//_________________________________________________________________________
5f20d3fb 19// Implementation version v1 of PHOS Manager class
a3dfe79c 20//---
21// Layout EMC + PPSD has name GPS2:
ed4205d8 22// Produces cumulated hits
a3dfe79c 23//---
24// Layout EMC + CPV has name IHEP:
ed4205d8 25// Produces hits for CPV, cumulated hits
26//---
27// Layout EMC + CPV + PPSD has name GPS:
28// Produces hits for CPV, cumulated hits
29//---
5f20d3fb 30//*-- Author: Yves Schutz (SUBATECH)
b2a60966 31
7587f5a5 32
33// --- ROOT system ---
bea63bea 34
35#include "TBRIK.h"
36#include "TNode.h"
7587f5a5 37#include "TRandom.h"
94de3818 38#include "TTree.h"
f6d1e5e1 39#include "TParticle.h"
7587f5a5 40
41// --- Standard library ---
42
de9ec31b 43#include <string.h>
44#include <stdlib.h>
7587f5a5 45
46// --- AliRoot header files ---
47
48#include "AliPHOSv1.h"
49#include "AliPHOSHit.h"
97cee223 50#include "AliPHOSCPVDigit.h"
7587f5a5 51#include "AliRun.h"
52#include "AliConst.h"
94de3818 53#include "AliMC.h"
97cee223 54#include "AliPHOSGeometry.h"
7b326aac 55#include "AliPHOSQAIntCheckable.h"
56#include "AliPHOSQAFloatCheckable.h"
57#include "AliPHOSQAMeanChecker.h"
7587f5a5 58
59ClassImp(AliPHOSv1)
60
bea63bea 61//____________________________________________________________________________
02ab1add 62AliPHOSv1::AliPHOSv1():
63AliPHOSv0()
bea63bea 64{
735e58f1 65 // default ctor: initialze data memebers
66 fQAHitsMul = 0 ;
67 fQAHitsMulB = 0 ;
68 fQATotEner = 0 ;
69 fQATotEnerB = 0 ;
9688c1dd 70
71 fLightYieldMean = 0. ;
72 fIntrinsicPINEfficiency = 0. ;
73 fLightYieldAttenuation = 0. ;
74 fRecalibrationFactor = 0. ;
75 fElectronsPerGeV = 0. ;
27f33ee5 76 fAPDGain = 0. ;
77 fLightFactor = 0. ;
78 fAPDFactor = 0. ;
9688c1dd 79
bea63bea 80}
81
7587f5a5 82//____________________________________________________________________________
83AliPHOSv1::AliPHOSv1(const char *name, const char *title):
7b326aac 84 AliPHOSv0(name,title)
7587f5a5 85{
5f20d3fb 86 //
ed4205d8 87 // We store hits :
5f20d3fb 88 // - fHits (the "normal" one), which retains the hits associated with
89 // the current primary particle being tracked
90 // (this array is reset after each primary has been tracked).
91 //
fa412d9b 92
037cc66d 93
5f20d3fb 94
95 // We do not want to save in TreeH the raw hits
96 // But save the cumulated hits instead (need to create the branch myself)
97 // It is put in the Digit Tree because the TreeH is filled after each primary
7b326aac 98 // and the TreeD at the end of the event (branch is set in FinishEvent() ).
5f20d3fb 99
ed4205d8 100 fHits= new TClonesArray("AliPHOSHit",1000) ;
f6d1e5e1 101 gAlice->AddHitList(fHits) ;
5f20d3fb 102
ed4205d8 103 fNhits = 0 ;
5f20d3fb 104
f6d1e5e1 105 fIshunt = 2 ; // All hits are associated with primary particles
7b326aac 106
9688c1dd 107 //Photoelectron statistics:
108 // The light yield is a poissonian distribution of the number of
109 // photons created in the PbWo4 crystal, calculated using following formula
110 // NumberOfPhotons = EnergyLost * LightYieldMean* APDEfficiency *
111 // exp (-LightYieldAttenuation * DistanceToPINdiodeFromTheHit);
112 // LightYieldMean is parameter calculated to be over 47000 photons per GeV
113 // APDEfficiency is 0.02655
114 // k_0 is 0.0045 from Valery Antonenko
115 // The number of electrons created in the APD is
116 // NumberOfElectrons = APDGain * LightYield
117 // The APD Gain is 300
118 fLightYieldMean = 47000;
119 fIntrinsicPINEfficiency = 0.02655 ; //APD= 0.1875/0.1271 * 0.018 (PIN)
27f33ee5 120 fLightYieldAttenuation = 0.0045 ;
121 fRecalibrationFactor = 13.418/ fLightYieldMean ;
122 fElectronsPerGeV = 2.77e+8 ;
123 fAPDGain = 300. ;
124 fLightFactor = fLightYieldMean * fIntrinsicPINEfficiency ;
125 fAPDFactor = (fRecalibrationFactor/100.) * fAPDGain ;
126
9688c1dd 127
fa7cce36 128 Int_t nb = GetGeometry()->GetNModules() ;
fa412d9b 129
7b326aac 130 // create checkables
131 fQAHitsMul = new AliPHOSQAIntCheckable("HitsM") ;
132 fQATotEner = new AliPHOSQAFloatCheckable("TotEn") ;
9bc230c0 133 fQAHitsMulB = new TClonesArray("AliPHOSQAIntCheckable",nb) ;
134 fQAHitsMulB->SetOwner() ;
7b326aac 135 fQATotEnerB = new TClonesArray("AliPHOSQAFloatCheckable", nb);
9bc230c0 136 fQATotEnerB->SetOwner() ;
7b326aac 137 char tempo[20] ;
138 Int_t i ;
139 for ( i = 0 ; i < nb ; i++ ) {
140 sprintf(tempo, "HitsMB%d", i+1) ;
141 new( (*fQAHitsMulB)[i]) AliPHOSQAIntCheckable(tempo) ;
142 sprintf(tempo, "TotEnB%d", i+1) ;
143 new( (*fQATotEnerB)[i] ) AliPHOSQAFloatCheckable(tempo) ;
144 }
145
7b326aac 146 AliPHOSQAMeanChecker * hmc = new AliPHOSQAMeanChecker("HitsMul", 100. ,25.) ;
147 AliPHOSQAMeanChecker * emc = new AliPHOSQAMeanChecker("TotEner", 10. ,5.) ;
148 AliPHOSQAMeanChecker * bhmc = new AliPHOSQAMeanChecker("HitsMulB", 100. ,5.) ;
149 AliPHOSQAMeanChecker * bemc = new AliPHOSQAMeanChecker("TotEnerB", 2. ,.5) ;
150
151 // associate checkables and checkers
152 fQAHitsMul->AddChecker(hmc) ;
153 fQATotEner->AddChecker(emc) ;
154 for ( i = 0 ; i < nb ; i++ ) {
29b077b5 155 (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]))->AddChecker(bhmc) ;
156 (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]))->AddChecker(bemc) ;
7b326aac 157 }
7b7c1533 158
5f20d3fb 159}
160
7587f5a5 161//____________________________________________________________________________
bea63bea 162AliPHOSv1::~AliPHOSv1()
b2a60966 163{
bea63bea 164 // dtor
5f20d3fb 165
ed4205d8 166 if ( fHits) {
167 fHits->Delete() ;
168 delete fHits ;
169 fHits = 0 ;
8dfa469d 170 }
9bc230c0 171
9bc230c0 172 if ( fQAHitsMulB ) {
173 fQAHitsMulB->Delete() ;
174 delete fQAHitsMulB ;
175 }
176
177 if ( fQATotEnerB ) {
178 fQATotEnerB->Delete() ;
179 delete fQATotEnerB ;
180 }
181
7587f5a5 182}
183
7587f5a5 184//____________________________________________________________________________
b37750a6 185void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits)
bea63bea 186{
187 // Add a hit to the hit list.
f6d1e5e1 188 // A PHOS hit is the sum of all hits in a single crystal from one primary and within some time gate
bea63bea 189
5f20d3fb 190 Int_t hitCounter ;
bea63bea 191 AliPHOSHit *newHit ;
5f20d3fb 192 AliPHOSHit *curHit ;
193 Bool_t deja = kFALSE ;
fa7cce36 194 AliPHOSGeometry * geom = GetGeometry() ;
bea63bea 195
b37750a6 196 newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ;
bea63bea 197
7854a24a 198 for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) {
29b077b5 199 curHit = dynamic_cast<AliPHOSHit*>((*fHits)[hitCounter]) ;
9688c1dd 200 if(curHit->GetPrimary() != primary) break ;
201 // We add hits with the same primary, while GEANT treats primaries succesively
ed4205d8 202 if( *curHit == *newHit ) {
f15a01eb 203 *curHit + *newHit ;
ed4205d8 204 deja = kTRUE ;
5f20d3fb 205 }
206 }
207
208 if ( !deja ) {
ed4205d8 209 new((*fHits)[fNhits]) AliPHOSHit(*newHit) ;
7b326aac 210 // get the block Id number
9688c1dd 211 Int_t relid[4] ;
fa7cce36 212 geom->AbsToRelNumbering(Id, relid) ;
7b326aac 213 // and fill the relevant QA checkable (only if in PbW04)
214 if ( relid[1] == 0 ) {
215 fQAHitsMul->Update(1) ;
29b077b5 216 (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[relid[0]-1]))->Update(1) ;
7b326aac 217 }
ed4205d8 218 fNhits++ ;
5f20d3fb 219 }
220
bea63bea 221 delete newHit;
bea63bea 222}
223
7b326aac 224//____________________________________________________________________________
225void AliPHOSv1::FinishPrimary()
226{
227 // called at the end of each track (primary) by AliRun
228 // hits are reset for each new track
229 // accumulate the total hit-multiplicity
230// if ( fQAHitsMul )
231// fQAHitsMul->Update( fHits->GetEntriesFast() ) ;
232
233}
234
235//____________________________________________________________________________
236void AliPHOSv1::FinishEvent()
237{
238 // called at the end of each event by AliRun
239 // accumulate the hit-multiplicity and total energy per block
240 // if the values have been updated check it
241
242 if ( fQATotEner ) {
243 if ( fQATotEner->HasChanged() ) {
244 fQATotEner->CheckMe() ;
245 fQATotEner->Reset() ;
246 }
247 }
248
249 Int_t i ;
250 if ( fQAHitsMulB && fQATotEnerB ) {
fa7cce36 251 for (i = 0 ; i < GetGeometry()->GetNModules() ; i++) {
29b077b5 252 AliPHOSQAIntCheckable * ci = static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]) ;
253 AliPHOSQAFloatCheckable* cf = static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]) ;
7b326aac 254 if ( ci->HasChanged() ) {
255 ci->CheckMe() ;
256 ci->Reset() ;
257 }
258 if ( cf->HasChanged() ) {
259 cf->CheckMe() ;
260 cf->Reset() ;
261 }
262 }
263 }
264
265 // check the total multiplicity
266
267 if ( fQAHitsMul ) {
268 if ( fQAHitsMul->HasChanged() ) {
269 fQAHitsMul->CheckMe() ;
270 fQAHitsMul->Reset() ;
271 }
272 }
273}
5f20d3fb 274//____________________________________________________________________________
7587f5a5 275void AliPHOSv1::StepManager(void)
276{
9688c1dd 277 // Accumulates hits as long as the track stays in a single crystal or CPV gas Cell
b2a60966 278
4f5bbbd4 279 Int_t relid[4] ; // (box, layer, row, column) indices
280 Int_t absid ; // absolute cell ID number
471193a8 281 Float_t xyzte[5]={-1000.,-1000.,-1000.,0.,0.} ; // position wrt MRS, time and energy deposited
4f5bbbd4 282 TLorentzVector pos ; // Lorentz vector of the track current position
fa412d9b 283 Int_t copy ;
7587f5a5 284
bea63bea 285 Int_t tracknumber = gAlice->CurrentTrack() ;
fa412d9b 286 Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() );
fa7cce36 287 TString name = GetGeometry()->GetName() ;
037cc66d 288
9688c1dd 289 Int_t moduleNumber ;
290
291 if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") &&
292 (gMC->IsTrackEntering() ) &&
293 gMC->TrackCharge() != 0) {
f6d1e5e1 294
9688c1dd 295 gMC -> TrackPosition(pos);
f6d1e5e1 296
9688c1dd 297 Float_t xyzm[3], xyzd[3] ;
298 Int_t i;
299 for (i=0; i<3; i++) xyzm[i] = pos[i];
300 gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system
301
e3daf02c 302 Float_t xyd[3]={0,0,0} ; //local position of the entering
9688c1dd 303 xyd[0] = xyzd[0];
53e03a1e 304 xyd[1] =-xyzd[2];
305 xyd[2] =-xyzd[1];
f6d1e5e1 306
9688c1dd 307 // Current momentum of the hit's track in the local ref. system
308 TLorentzVector pmom ; //momentum of the particle initiated hit
309 gMC -> TrackMomentum(pmom);
310 Float_t pm[3], pd[3];
311 for (i=0; i<3; i++)
312 pm[i] = pmom[i];
f6d1e5e1 313
9688c1dd 314 gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system
315 pmom[0] = pd[0];
cf75bc19 316 pmom[1] =-pd[1];
317 pmom[2] =-pd[2];
f6d1e5e1 318
9688c1dd 319 // Digitize the current CPV hit:
320
321 // 1. find pad response and
322 gMC->CurrentVolOffID(3,moduleNumber);
323 moduleNumber--;
324
325 TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit
326 CPVDigitize(pmom,xyd,moduleNumber,cpvDigits);
fa412d9b 327
9688c1dd 328 Float_t xmean = 0;
329 Float_t zmean = 0;
330 Float_t qsum = 0;
331 Int_t idigit,ndigits;
332
333 // 2. go through the current digit list and sum digits in pads
334
335 ndigits = cpvDigits->GetEntriesFast();
336 for (idigit=0; idigit<ndigits-1; idigit++) {
29b077b5 337 AliPHOSCPVDigit *cpvDigit1 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit));
9688c1dd 338 Float_t x1 = cpvDigit1->GetXpad() ;
339 Float_t z1 = cpvDigit1->GetYpad() ;
340 for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) {
29b077b5 341 AliPHOSCPVDigit *cpvDigit2 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(jdigit));
9688c1dd 342 Float_t x2 = cpvDigit2->GetXpad() ;
343 Float_t z2 = cpvDigit2->GetYpad() ;
344 if (x1==x2 && z1==z2) {
345 Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ;
346 cpvDigit2->SetQpad(qsum) ;
347 cpvDigits->RemoveAt(idigit) ;
fa412d9b 348 }
349 }
9688c1dd 350 }
351 cpvDigits->Compress() ;
352
353 // 3. add digits to temporary hit list fTmpHits
354
355 ndigits = cpvDigits->GetEntriesFast();
356 for (idigit=0; idigit<ndigits; idigit++) {
29b077b5 357 AliPHOSCPVDigit *cpvDigit = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit));
9688c1dd 358 relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number
359 relid[1] =-1 ; // means CPV
360 relid[2] = cpvDigit->GetXpad() ; // column number of a pad
361 relid[3] = cpvDigit->GetYpad() ; // row number of a pad
362
363 // get the absolute Id number
364 GetGeometry()->RelToAbsNumbering(relid, absid) ;
365
366 // add current digit to the temporary hit list
367
471193a8 368 xyzte[3] = gMC->TrackTime() ;
369 xyzte[4] = cpvDigit->GetQpad() ; // amplitude in a pad
9688c1dd 370 primary = -1; // No need in primary for CPV
471193a8 371 AddHit(fIshunt, primary, tracknumber, absid, xyzte);
9688c1dd 372
373 if (cpvDigit->GetQpad() > 0.02) {
374 xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5);
375 zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5);
376 qsum += cpvDigit->GetQpad();
fa412d9b 377 }
fa412d9b 378 }
e534a69d 379 if (cpvDigits) {
380 cpvDigits->Delete();
381 delete cpvDigits;
382 cpvDigits=0;
383 }
9688c1dd 384 }
037cc66d 385
9688c1dd 386
387
fa412d9b 388 if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal
9688c1dd 389
fa412d9b 390 gMC->TrackPosition(pos) ;
471193a8 391 xyzte[0] = pos[0] ;
392 xyzte[1] = pos[1] ;
393 xyzte[2] = pos[2] ;
597e6309 394
9688c1dd 395 Float_t global[3], local[3] ;
396 global[0] = pos[0] ;
397 global[1] = pos[1] ;
398 global[2] = pos[2] ;
399 Float_t lostenergy = gMC->Edep();
f6d1e5e1 400
401 //Put in the TreeK particle entering PHOS and all its parents
402 if ( gMC->IsTrackEntering() ){
403 Float_t xyzd[3] ;
471193a8 404 gMC -> Gmtod (xyzte, xyzd, 1); // transform coordinate from master to daughter system
f6d1e5e1 405 if (xyzd[1] > GetGeometry()->GetCrystalSize(1)/2-0.002 ||
406 xyzd[1] < -GetGeometry()->GetCrystalSize(1)/2+0.002) {
407 TParticle * part = 0 ;
408 Int_t parent = gAlice->CurrentTrack() ;
409 while ( parent != -1 ) {
410 part = gAlice->Particle(parent) ;
411 part->SetBit(kKeepBit);
412 parent = part->GetFirstMother() ;
413 }
414 }
415 }
9688c1dd 416 if ( lostenergy != 0 ) { // Track is inside the crystal and deposits some energy
471193a8 417 xyzte[3] = gMC->TrackTime() ;
f6d1e5e1 418
9688c1dd 419 gMC->CurrentVolOffID(10, moduleNumber) ; // get the PHOS module number ;
7b326aac 420
9688c1dd 421 Int_t strip ;
422 gMC->CurrentVolOffID(3, strip);
423 Int_t cell ;
424 gMC->CurrentVolOffID(2, cell);
f6d1e5e1 425
9688c1dd 426 Int_t row = 1 + GetGeometry()->GetNZ() - strip % GetGeometry()->GetNZ() ;
427 Int_t col = (Int_t) TMath::Ceil((Double_t) strip/GetGeometry()->GetNZ()) -1 ;
f6d1e5e1 428
9688c1dd 429 absid = (moduleNumber-1)*GetGeometry()->GetNCristalsInModule() +
430 row + (col*GetGeometry()->GetEMCAGeometry()->GetNCellsInStrip() + cell-1)*GetGeometry()->GetNZ() ;
f6d1e5e1 431
9688c1dd 432 gMC->Gmtod(global, local, 1) ;
433
471193a8 434 //Calculates the light yield, the number of photons produced in the
9688c1dd 435 //crystal
27f33ee5 436 Float_t lightYield = gRandom->Poisson(fLightFactor * lostenergy *
9688c1dd 437 exp(-fLightYieldAttenuation *
438 (local[1]+GetGeometry()->GetCrystalSize(1)/2.0 ))
439 ) ;
471193a8 440
9688c1dd 441 //Calculates de energy deposited in the crystal
471193a8 442 xyzte[4] = fAPDFactor * lightYield ;
9688c1dd 443
444 // add current hit to the hit list
21cd0c07 445 // Info("StepManager","%d %d", primary, tracknumber) ;
471193a8 446 AddHit(fIshunt, primary,tracknumber, absid, xyzte);
9688c1dd 447
94de8339 448 // fill the relevant QA Checkables
471193a8 449 fQATotEner->Update( xyzte[4] ) ; // total energy in PHOS
450 (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[moduleNumber-1]))->Update( xyzte[4] ) ; // energy in this block
f6d1e5e1 451
fa412d9b 452 } // there is deposited energy
453 } // we are inside a PHOS Xtal
f6d1e5e1 454
fa412d9b 455}
456
457//____________________________________________________________________________
458void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits)
459{
460 // ------------------------------------------------------------------------
461 // Digitize one CPV hit:
462 // On input take exact 4-momentum p and position zxhit of the hit,
463 // find the pad response around this hit and
464 // put the amplitudes in the pads into array digits
465 //
466 // Author: Yuri Kharlov (after Serguei Sadovsky)
467 // 2 October 2000
468 // ------------------------------------------------------------------------
469
fa7cce36 470 const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad)
a3dfe79c 471 const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e-
472 const Float_t kdEdx = 4.0; // Average energy loss in CPV;
473 const Int_t kNgamz = 5; // Ionization size in Z
474 const Int_t kNgamx = 9; // Ionization size in Phi
475 const Float_t kNoise = 0.03; // charge noise in one pad
fa412d9b 476
477 Float_t rnor1,rnor2;
478
479 // Just a reminder on axes notation in the CPV module:
480 // axis Z goes along the beam
481 // axis X goes across the beam in the module plane
482 // axis Y is a normal to the module plane showing from the IP
483
484 Float_t hitX = zxhit[0];
485 Float_t hitZ =-zxhit[1];
486 Float_t pX = p.Px();
487 Float_t pZ =-p.Pz();
488 Float_t pNorm = p.Py();
a3dfe79c 489 Float_t eloss = kdEdx;
3d402178 490
21cd0c07 491//Info("CPVDigitize", "YVK : %f %f | %f %f %d", hitX, hitZ, pX, pZ, pNorm) ;
7b326aac 492
fa7cce36 493 Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness();
494 Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness();
fa412d9b 495 gRandom->Rannor(rnor1,rnor2);
a3dfe79c 496 eloss *= (1 + kDetR*rnor1) *
fa7cce36 497 TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2)));
498 Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2;
499 Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2;
fa412d9b 500 Float_t zhit2 = zhit1 + dZY;
501 Float_t xhit2 = xhit1 + dXY;
502
a3dfe79c 503 Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in"
504 Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out"
fa412d9b 505
506 Int_t nIter;
507 Float_t zxe[3][5];
508 if (iwht1==iwht2) { // incline 1-wire hit
509 nIter = 2;
510 zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2;
a3dfe79c 511 zxe[1][0] = (iwht1 + 0.5) * kCelWr;
512 zxe[2][0] = eloss/2;
fa412d9b 513 zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2;
a3dfe79c 514 zxe[1][1] = (iwht1 + 0.5) * kCelWr;
515 zxe[2][1] = eloss/2;
fa412d9b 516 }
517 else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit
518 nIter = 3;
519 Int_t iwht3 = (iwht1 + iwht2) / 2;
a3dfe79c 520 Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1
521 Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2
522 Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3
fa412d9b 523 Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13
524 Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23
525 Float_t dxw1 = xhit1 - xwr13;
526 Float_t dxw2 = xhit2 - xwr23;
a3dfe79c 527 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
528 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
529 Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
fa412d9b 530 zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2;
531 zxe[1][0] = xwht1;
a3dfe79c 532 zxe[2][0] = eloss * egm1;
fa412d9b 533 zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2;
534 zxe[1][1] = xwht2;
a3dfe79c 535 zxe[2][1] = eloss * egm2;
fa412d9b 536 zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1;
537 zxe[1][2] = xwht3;
a3dfe79c 538 zxe[2][2] = eloss * egm3;
fa412d9b 539 }
540 else { // incline 2-wire hit
541 nIter = 2;
a3dfe79c 542 Float_t xwht1 = (iwht1 + 0.5) * kCelWr;
543 Float_t xwht2 = (iwht2 + 0.5) * kCelWr;
fa412d9b 544 Float_t xwr12 = (xwht1 + xwht2) / 2;
545 Float_t dxw1 = xhit1 - xwr12;
546 Float_t dxw2 = xhit2 - xwr12;
547 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
548 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
549 zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2;
550 zxe[1][0] = xwht1;
a3dfe79c 551 zxe[2][0] = eloss * egm1;
fa412d9b 552 zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2;
553 zxe[1][1] = xwht2;
a3dfe79c 554 zxe[2][1] = eloss * egm2;
fa412d9b 555 }
bea63bea 556
fa412d9b 557 // Finite size of ionization region
558
fa7cce36 559 Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ();
560 Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi();
a3dfe79c 561 Int_t nz3 = (kNgamz+1)/2;
562 Int_t nx3 = (kNgamx+1)/2;
563 cpvDigits->Expand(nIter*kNgamx*kNgamz);
29b077b5 564 TClonesArray &ldigits = *(static_cast<TClonesArray *>(cpvDigits));
fa412d9b 565
566 for (Int_t iter=0; iter<nIter; iter++) {
567
568 Float_t zhit = zxe[0][iter];
569 Float_t xhit = zxe[1][iter];
570 Float_t qhit = zxe[2][iter];
fa7cce36 571 Float_t zcell = zhit / GetGeometry()->GetPadSizeZ();
572 Float_t xcell = xhit / GetGeometry()->GetPadSizePhi();
fa412d9b 573 if ( zcell<=0 || xcell<=0 ||
574 zcell>=nCellZ || xcell>=nCellX) return;
575 Int_t izcell = (Int_t) zcell;
576 Int_t ixcell = (Int_t) xcell;
577 Float_t zc = zcell - izcell - 0.5;
578 Float_t xc = xcell - ixcell - 0.5;
a3dfe79c 579 for (Int_t iz=1; iz<=kNgamz; iz++) {
fa412d9b 580 Int_t kzg = izcell + iz - nz3;
581 if (kzg<=0 || kzg>nCellZ) continue;
582 Float_t zg = (Float_t)(iz-nz3) - zc;
a3dfe79c 583 for (Int_t ix=1; ix<=kNgamx; ix++) {
fa412d9b 584 Int_t kxg = ixcell + ix - nx3;
585 if (kxg<=0 || kxg>nCellX) continue;
586 Float_t xg = (Float_t)(ix-nx3) - xc;
587
588 // Now calculate pad response
589 Float_t qpad = CPVPadResponseFunction(qhit,zg,xg);
a3dfe79c 590 qpad += kNoise*rnor2;
fa412d9b 591 if (qpad<0) continue;
592
593 // Fill the array with pad response ID and amplitude
3d402178 594 new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad);
fa412d9b 595 }
fa412d9b 596 }
fa412d9b 597 }
598}
599
600//____________________________________________________________________________
601Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) {
602 // ------------------------------------------------------------------------
603 // Calculate the amplitude in one CPV pad using the
604 // cumulative pad response function
605 // Author: Yuri Kharlov (after Serguei Sadovski)
606 // 3 October 2000
607 // ------------------------------------------------------------------------
608
fa7cce36 609 Double_t dz = GetGeometry()->GetPadSizeZ() / 2;
610 Double_t dx = GetGeometry()->GetPadSizePhi() / 2;
611 Double_t z = zhit * GetGeometry()->GetPadSizeZ();
612 Double_t x = xhit * GetGeometry()->GetPadSizePhi();
fa412d9b 613 Double_t amplitude = qhit *
614 (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) -
615 CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx));
616 return (Float_t)amplitude;
7587f5a5 617}
618
fa412d9b 619//____________________________________________________________________________
620Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) {
621 // ------------------------------------------------------------------------
622 // Cumulative pad response function
623 // It includes several terms from the CF decomposition in electrostatics
624 // Note: this cumulative function is wrong since omits some terms
625 // but the cell amplitude obtained with it is correct because
626 // these omitting terms cancel
627 // Author: Yuri Kharlov (after Serguei Sadovski)
628 // 3 October 2000
629 // ------------------------------------------------------------------------
630
a3dfe79c 631 const Double_t kA=1.0;
632 const Double_t kB=0.7;
fa412d9b 633
634 Double_t r2 = x*x + y*y;
635 Double_t xy = x*y;
636 Double_t cumulPRF = 0;
637 for (Int_t i=0; i<=4; i++) {
a3dfe79c 638 Double_t b1 = (2*i + 1) * kB;
fa412d9b 639 cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) );
640 }
a3dfe79c 641 cumulPRF *= kA/(2*TMath::Pi());
fa412d9b 642 return cumulPRF;
643}
7eb9d12d 644