A lot of mods to put PHOS in the official TFolder/TTask structure
[u/mrichter/AliRoot.git] / PHOS / AliPHOSv1.cxx
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7587f5a5 1/**************************************************************************
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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"
7587f5a5 39
5f20d3fb 40
7587f5a5 41// --- Standard library ---
42
de9ec31b 43#include <stdio.h>
44#include <string.h>
45#include <stdlib.h>
46#include <strstream.h>
7587f5a5 47
48// --- AliRoot header files ---
49
50#include "AliPHOSv1.h"
51#include "AliPHOSHit.h"
97cee223 52#include "AliPHOSCPVDigit.h"
7587f5a5 53#include "AliRun.h"
54#include "AliConst.h"
94de3818 55#include "AliMC.h"
97cee223 56#include "AliPHOSGeometry.h"
7b326aac 57#include "AliPHOSQAIntCheckable.h"
58#include "AliPHOSQAFloatCheckable.h"
59#include "AliPHOSQAMeanChecker.h"
7587f5a5 60
61ClassImp(AliPHOSv1)
62
63//____________________________________________________________________________
02ab1add 64AliPHOSv1::AliPHOSv1():
65AliPHOSv0()
bea63bea 66{
735e58f1 67 // default ctor: initialze data memebers
68 fQAHitsMul = 0 ;
69 fQAHitsMulB = 0 ;
70 fQATotEner = 0 ;
71 fQATotEnerB = 0 ;
9688c1dd 72
73 fLightYieldMean = 0. ;
74 fIntrinsicPINEfficiency = 0. ;
75 fLightYieldAttenuation = 0. ;
76 fRecalibrationFactor = 0. ;
77 fElectronsPerGeV = 0. ;
78 fAPDGain = 0. ;
79
bea63bea 80}
81
82//____________________________________________________________________________
7587f5a5 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) ;
5f20d3fb 101
ed4205d8 102 fNhits = 0 ;
5f20d3fb 103
5f20d3fb 104 fIshunt = 1 ; // All hits are associated with primary particles
7b326aac 105
9688c1dd 106 //Photoelectron statistics:
107 // The light yield is a poissonian distribution of the number of
108 // photons created in the PbWo4 crystal, calculated using following formula
109 // NumberOfPhotons = EnergyLost * LightYieldMean* APDEfficiency *
110 // exp (-LightYieldAttenuation * DistanceToPINdiodeFromTheHit);
111 // LightYieldMean is parameter calculated to be over 47000 photons per GeV
112 // APDEfficiency is 0.02655
113 // k_0 is 0.0045 from Valery Antonenko
114 // The number of electrons created in the APD is
115 // NumberOfElectrons = APDGain * LightYield
116 // The APD Gain is 300
117 fLightYieldMean = 47000;
118 fIntrinsicPINEfficiency = 0.02655 ; //APD= 0.1875/0.1271 * 0.018 (PIN)
119 fLightYieldAttenuation = 0.0045 ;
120 fRecalibrationFactor = 13.418/ fLightYieldMean ;
121 fElectronsPerGeV = 2.77e+8 ;
122 fAPDGain= 300. ;
123
fa7cce36 124 Int_t nb = GetGeometry()->GetNModules() ;
fa412d9b 125
7b326aac 126 // create checkables
127 fQAHitsMul = new AliPHOSQAIntCheckable("HitsM") ;
128 fQATotEner = new AliPHOSQAFloatCheckable("TotEn") ;
129 fQAHitsMulB = new TClonesArray("AliPHOSQAIntCheckable",nb) ;
130 fQATotEnerB = new TClonesArray("AliPHOSQAFloatCheckable", nb);
131 char tempo[20] ;
132 Int_t i ;
133 for ( i = 0 ; i < nb ; i++ ) {
134 sprintf(tempo, "HitsMB%d", i+1) ;
135 new( (*fQAHitsMulB)[i]) AliPHOSQAIntCheckable(tempo) ;
136 sprintf(tempo, "TotEnB%d", i+1) ;
137 new( (*fQATotEnerB)[i] ) AliPHOSQAFloatCheckable(tempo) ;
138 }
139
7b326aac 140 AliPHOSQAMeanChecker * hmc = new AliPHOSQAMeanChecker("HitsMul", 100. ,25.) ;
141 AliPHOSQAMeanChecker * emc = new AliPHOSQAMeanChecker("TotEner", 10. ,5.) ;
142 AliPHOSQAMeanChecker * bhmc = new AliPHOSQAMeanChecker("HitsMulB", 100. ,5.) ;
143 AliPHOSQAMeanChecker * bemc = new AliPHOSQAMeanChecker("TotEnerB", 2. ,.5) ;
144
145 // associate checkables and checkers
146 fQAHitsMul->AddChecker(hmc) ;
147 fQATotEner->AddChecker(emc) ;
148 for ( i = 0 ; i < nb ; i++ ) {
29b077b5 149 (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]))->AddChecker(bhmc) ;
150 (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]))->AddChecker(bemc) ;
7b326aac 151 }
7b7c1533 152
5f20d3fb 153}
154
155//____________________________________________________________________________
bea63bea 156AliPHOSv1::~AliPHOSv1()
b2a60966 157{
bea63bea 158 // dtor
5f20d3fb 159
ed4205d8 160 if ( fHits) {
161 fHits->Delete() ;
162 delete fHits ;
163 fHits = 0 ;
8dfa469d 164 }
7b7c1533 165 if (fTreeQA)
166 delete fTreeQA ;
7587f5a5 167}
168
169//____________________________________________________________________________
b37750a6 170void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits)
bea63bea 171{
172 // Add a hit to the hit list.
9688c1dd 173 // A PHOS hit is the sum of all hits in a single crystal from one primary and within soem taime gate
bea63bea 174
5f20d3fb 175 Int_t hitCounter ;
bea63bea 176 AliPHOSHit *newHit ;
5f20d3fb 177 AliPHOSHit *curHit ;
178 Bool_t deja = kFALSE ;
fa7cce36 179 AliPHOSGeometry * geom = GetGeometry() ;
bea63bea 180
b37750a6 181 newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ;
bea63bea 182
7854a24a 183 for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) {
29b077b5 184 curHit = dynamic_cast<AliPHOSHit*>((*fHits)[hitCounter]) ;
9688c1dd 185 if(curHit->GetPrimary() != primary) break ;
186 // We add hits with the same primary, while GEANT treats primaries succesively
ed4205d8 187 if( *curHit == *newHit ) {
f15a01eb 188 *curHit + *newHit ;
ed4205d8 189 deja = kTRUE ;
5f20d3fb 190 }
191 }
192
193 if ( !deja ) {
ed4205d8 194 new((*fHits)[fNhits]) AliPHOSHit(*newHit) ;
7b326aac 195 // get the block Id number
9688c1dd 196 Int_t relid[4] ;
fa7cce36 197 geom->AbsToRelNumbering(Id, relid) ;
7b326aac 198 // and fill the relevant QA checkable (only if in PbW04)
199 if ( relid[1] == 0 ) {
200 fQAHitsMul->Update(1) ;
29b077b5 201 (static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[relid[0]-1]))->Update(1) ;
7b326aac 202 }
ed4205d8 203 fNhits++ ;
5f20d3fb 204 }
205
bea63bea 206 delete newHit;
bea63bea 207}
208
ed4205d8 209//____________________________________________________________________________
7b326aac 210void AliPHOSv1::FinishPrimary()
211{
212 // called at the end of each track (primary) by AliRun
213 // hits are reset for each new track
214 // accumulate the total hit-multiplicity
215// if ( fQAHitsMul )
216// fQAHitsMul->Update( fHits->GetEntriesFast() ) ;
217
218}
219
220//____________________________________________________________________________
221void AliPHOSv1::FinishEvent()
222{
223 // called at the end of each event by AliRun
224 // accumulate the hit-multiplicity and total energy per block
225 // if the values have been updated check it
226
227 if ( fQATotEner ) {
228 if ( fQATotEner->HasChanged() ) {
229 fQATotEner->CheckMe() ;
230 fQATotEner->Reset() ;
231 }
232 }
233
234 Int_t i ;
235 if ( fQAHitsMulB && fQATotEnerB ) {
fa7cce36 236 for (i = 0 ; i < GetGeometry()->GetNModules() ; i++) {
29b077b5 237 AliPHOSQAIntCheckable * ci = static_cast<AliPHOSQAIntCheckable*>((*fQAHitsMulB)[i]) ;
238 AliPHOSQAFloatCheckable* cf = static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[i]) ;
7b326aac 239 if ( ci->HasChanged() ) {
240 ci->CheckMe() ;
241 ci->Reset() ;
242 }
243 if ( cf->HasChanged() ) {
244 cf->CheckMe() ;
245 cf->Reset() ;
246 }
247 }
248 }
249
250 // check the total multiplicity
251
252 if ( fQAHitsMul ) {
253 if ( fQAHitsMul->HasChanged() ) {
254 fQAHitsMul->CheckMe() ;
255 fQAHitsMul->Reset() ;
256 }
257 }
258}
7b326aac 259//____________________________________________________________________________
7587f5a5 260void AliPHOSv1::StepManager(void)
261{
9688c1dd 262 // Accumulates hits as long as the track stays in a single crystal or CPV gas Cell
b2a60966 263
4f5bbbd4 264 Int_t relid[4] ; // (box, layer, row, column) indices
265 Int_t absid ; // absolute cell ID number
9688c1dd 266 Float_t xyze[5]={-1000,-1000,-1000,0,0} ; // position wrt MRS, time and energy deposited
4f5bbbd4 267 TLorentzVector pos ; // Lorentz vector of the track current position
fa412d9b 268 Int_t copy ;
7587f5a5 269
bea63bea 270 Int_t tracknumber = gAlice->CurrentTrack() ;
fa412d9b 271 Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() );
fa7cce36 272 TString name = GetGeometry()->GetName() ;
037cc66d 273
9688c1dd 274 Int_t moduleNumber ;
275
276 if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") &&
277 (gMC->IsTrackEntering() ) &&
278 gMC->TrackCharge() != 0) {
b37750a6 279
9688c1dd 280 gMC -> TrackPosition(pos);
281
282 Float_t xyzm[3], xyzd[3] ;
283 Int_t i;
284 for (i=0; i<3; i++) xyzm[i] = pos[i];
285 gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system
286
287 Float_t xyd[3]={0,0,0} ; //local posiiton of the entering
288 xyd[0] = xyzd[0];
289 xyd[1] =-xyzd[2];
290 xyd[2] =-xyzd[1];
291
292 // Current momentum of the hit's track in the local ref. system
293 TLorentzVector pmom ; //momentum of the particle initiated hit
294 gMC -> TrackMomentum(pmom);
295 Float_t pm[3], pd[3];
296 for (i=0; i<3; i++)
297 pm[i] = pmom[i];
298
299 gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system
300 pmom[0] = pd[0];
301 pmom[1] =-pd[2];
302 pmom[2] =-pd[1];
fa412d9b 303
9688c1dd 304 // Digitize the current CPV hit:
305
306 // 1. find pad response and
307 gMC->CurrentVolOffID(3,moduleNumber);
308 moduleNumber--;
309
310 TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit
311 CPVDigitize(pmom,xyd,moduleNumber,cpvDigits);
fa412d9b 312
9688c1dd 313 Float_t xmean = 0;
314 Float_t zmean = 0;
315 Float_t qsum = 0;
316 Int_t idigit,ndigits;
317
318 // 2. go through the current digit list and sum digits in pads
319
320 ndigits = cpvDigits->GetEntriesFast();
321 for (idigit=0; idigit<ndigits-1; idigit++) {
29b077b5 322 AliPHOSCPVDigit *cpvDigit1 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit));
9688c1dd 323 Float_t x1 = cpvDigit1->GetXpad() ;
324 Float_t z1 = cpvDigit1->GetYpad() ;
325 for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) {
29b077b5 326 AliPHOSCPVDigit *cpvDigit2 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(jdigit));
9688c1dd 327 Float_t x2 = cpvDigit2->GetXpad() ;
328 Float_t z2 = cpvDigit2->GetYpad() ;
329 if (x1==x2 && z1==z2) {
330 Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ;
331 cpvDigit2->SetQpad(qsum) ;
332 cpvDigits->RemoveAt(idigit) ;
fa412d9b 333 }
334 }
9688c1dd 335 }
336 cpvDigits->Compress() ;
337
338 // 3. add digits to temporary hit list fTmpHits
339
340 ndigits = cpvDigits->GetEntriesFast();
341 for (idigit=0; idigit<ndigits; idigit++) {
29b077b5 342 AliPHOSCPVDigit *cpvDigit = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit));
9688c1dd 343 relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number
344 relid[1] =-1 ; // means CPV
345 relid[2] = cpvDigit->GetXpad() ; // column number of a pad
346 relid[3] = cpvDigit->GetYpad() ; // row number of a pad
347
348 // get the absolute Id number
349 GetGeometry()->RelToAbsNumbering(relid, absid) ;
350
351 // add current digit to the temporary hit list
352
353 xyze[3] = gMC->TrackTime() ;
354 xyze[4] = cpvDigit->GetQpad() ; // amplitude in a pad
355 primary = -1; // No need in primary for CPV
356 AddHit(fIshunt, primary, tracknumber, absid, xyze);
357
358 if (cpvDigit->GetQpad() > 0.02) {
359 xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5);
360 zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5);
361 qsum += cpvDigit->GetQpad();
fa412d9b 362 }
fa412d9b 363 }
9688c1dd 364 delete cpvDigits;
365 }
037cc66d 366
9688c1dd 367
368
fa412d9b 369 if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal
9688c1dd 370
fa412d9b 371 gMC->TrackPosition(pos) ;
372 xyze[0] = pos[0] ;
373 xyze[1] = pos[1] ;
374 xyze[2] = pos[2] ;
9688c1dd 375 Float_t global[3], local[3] ;
376 global[0] = pos[0] ;
377 global[1] = pos[1] ;
378 global[2] = pos[2] ;
379 Float_t lostenergy = gMC->Edep();
037cc66d 380
9688c1dd 381 if ( lostenergy != 0 ) { // Track is inside the crystal and deposits some energy
382
383 xyze[3] = gMC->TrackTime() ;
ed4205d8 384
9688c1dd 385 gMC->CurrentVolOffID(10, moduleNumber) ; // get the PHOS module number ;
7b326aac 386
387 // fill the relevant QA Checkables
9688c1dd 388 fQATotEner->Update( xyze[4] ) ; // total energy in PHOS
29b077b5 389 (static_cast<AliPHOSQAFloatCheckable*>((*fQATotEnerB)[moduleNumber-1]))->Update( xyze[4] ) ; // energy in this block
fad3e5b9 390
9688c1dd 391 Int_t strip ;
392 gMC->CurrentVolOffID(3, strip);
393 Int_t cell ;
394 gMC->CurrentVolOffID(2, cell);
ed4205d8 395
9688c1dd 396 Int_t row = 1 + GetGeometry()->GetNZ() - strip % GetGeometry()->GetNZ() ;
397 Int_t col = (Int_t) TMath::Ceil((Double_t) strip/GetGeometry()->GetNZ()) -1 ;
037cc66d 398
9688c1dd 399 absid = (moduleNumber-1)*GetGeometry()->GetNCristalsInModule() +
400 row + (col*GetGeometry()->GetEMCAGeometry()->GetNCellsInStrip() + cell-1)*GetGeometry()->GetNZ() ;
ed4205d8 401
9688c1dd 402 gMC->Gmtod(global, local, 1) ;
403
404 //Calculates the light yield, the number of photns produced in the
405 //crystal
406 Float_t lightYield = gRandom->Poisson(fLightYieldMean * lostenergy *
407 fIntrinsicPINEfficiency *
408 exp(-fLightYieldAttenuation *
409 (local[1]+GetGeometry()->GetCrystalSize(1)/2.0 ))
410 ) ;
411 //Calculates de energy deposited in the crystal
412 xyze[4] = (fRecalibrationFactor/100.) * fAPDGain * lightYield ;
413
414 // add current hit to the hit list
415 AddHit(fIshunt, primary,tracknumber, absid, xyze);
416
417
fa412d9b 418 } // there is deposited energy
419 } // we are inside a PHOS Xtal
9688c1dd 420
fa412d9b 421}
422
423//____________________________________________________________________________
424void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits)
425{
426 // ------------------------------------------------------------------------
427 // Digitize one CPV hit:
428 // On input take exact 4-momentum p and position zxhit of the hit,
429 // find the pad response around this hit and
430 // put the amplitudes in the pads into array digits
431 //
432 // Author: Yuri Kharlov (after Serguei Sadovsky)
433 // 2 October 2000
434 // ------------------------------------------------------------------------
435
fa7cce36 436 const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad)
a3dfe79c 437 const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e-
438 const Float_t kdEdx = 4.0; // Average energy loss in CPV;
439 const Int_t kNgamz = 5; // Ionization size in Z
440 const Int_t kNgamx = 9; // Ionization size in Phi
441 const Float_t kNoise = 0.03; // charge noise in one pad
fa412d9b 442
443 Float_t rnor1,rnor2;
444
445 // Just a reminder on axes notation in the CPV module:
446 // axis Z goes along the beam
447 // axis X goes across the beam in the module plane
448 // axis Y is a normal to the module plane showing from the IP
449
450 Float_t hitX = zxhit[0];
451 Float_t hitZ =-zxhit[1];
452 Float_t pX = p.Px();
453 Float_t pZ =-p.Pz();
454 Float_t pNorm = p.Py();
a3dfe79c 455 Float_t eloss = kdEdx;
3d402178 456
7b326aac 457// cout << "CPVDigitize: YVK : "<<hitX<<" "<<hitZ<<" | "<<pX<<" "<<pZ<<" "<<pNorm<<endl;
458
fa7cce36 459 Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness();
460 Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness();
fa412d9b 461 gRandom->Rannor(rnor1,rnor2);
a3dfe79c 462 eloss *= (1 + kDetR*rnor1) *
fa7cce36 463 TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2)));
464 Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2;
465 Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2;
fa412d9b 466 Float_t zhit2 = zhit1 + dZY;
467 Float_t xhit2 = xhit1 + dXY;
468
a3dfe79c 469 Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in"
470 Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out"
fa412d9b 471
472 Int_t nIter;
473 Float_t zxe[3][5];
474 if (iwht1==iwht2) { // incline 1-wire hit
475 nIter = 2;
476 zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2;
a3dfe79c 477 zxe[1][0] = (iwht1 + 0.5) * kCelWr;
478 zxe[2][0] = eloss/2;
fa412d9b 479 zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2;
a3dfe79c 480 zxe[1][1] = (iwht1 + 0.5) * kCelWr;
481 zxe[2][1] = eloss/2;
fa412d9b 482 }
483 else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit
484 nIter = 3;
485 Int_t iwht3 = (iwht1 + iwht2) / 2;
a3dfe79c 486 Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1
487 Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2
488 Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3
fa412d9b 489 Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13
490 Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23
491 Float_t dxw1 = xhit1 - xwr13;
492 Float_t dxw2 = xhit2 - xwr23;
a3dfe79c 493 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
494 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
495 Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
fa412d9b 496 zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2;
497 zxe[1][0] = xwht1;
a3dfe79c 498 zxe[2][0] = eloss * egm1;
fa412d9b 499 zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2;
500 zxe[1][1] = xwht2;
a3dfe79c 501 zxe[2][1] = eloss * egm2;
fa412d9b 502 zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1;
503 zxe[1][2] = xwht3;
a3dfe79c 504 zxe[2][2] = eloss * egm3;
fa412d9b 505 }
506 else { // incline 2-wire hit
507 nIter = 2;
a3dfe79c 508 Float_t xwht1 = (iwht1 + 0.5) * kCelWr;
509 Float_t xwht2 = (iwht2 + 0.5) * kCelWr;
fa412d9b 510 Float_t xwr12 = (xwht1 + xwht2) / 2;
511 Float_t dxw1 = xhit1 - xwr12;
512 Float_t dxw2 = xhit2 - xwr12;
513 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
514 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
515 zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2;
516 zxe[1][0] = xwht1;
a3dfe79c 517 zxe[2][0] = eloss * egm1;
fa412d9b 518 zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2;
519 zxe[1][1] = xwht2;
a3dfe79c 520 zxe[2][1] = eloss * egm2;
fa412d9b 521 }
bea63bea 522
fa412d9b 523 // Finite size of ionization region
524
fa7cce36 525 Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ();
526 Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi();
a3dfe79c 527 Int_t nz3 = (kNgamz+1)/2;
528 Int_t nx3 = (kNgamx+1)/2;
529 cpvDigits->Expand(nIter*kNgamx*kNgamz);
29b077b5 530 TClonesArray &ldigits = *(static_cast<TClonesArray *>(cpvDigits));
fa412d9b 531
532 for (Int_t iter=0; iter<nIter; iter++) {
533
534 Float_t zhit = zxe[0][iter];
535 Float_t xhit = zxe[1][iter];
536 Float_t qhit = zxe[2][iter];
fa7cce36 537 Float_t zcell = zhit / GetGeometry()->GetPadSizeZ();
538 Float_t xcell = xhit / GetGeometry()->GetPadSizePhi();
fa412d9b 539 if ( zcell<=0 || xcell<=0 ||
540 zcell>=nCellZ || xcell>=nCellX) return;
541 Int_t izcell = (Int_t) zcell;
542 Int_t ixcell = (Int_t) xcell;
543 Float_t zc = zcell - izcell - 0.5;
544 Float_t xc = xcell - ixcell - 0.5;
a3dfe79c 545 for (Int_t iz=1; iz<=kNgamz; iz++) {
fa412d9b 546 Int_t kzg = izcell + iz - nz3;
547 if (kzg<=0 || kzg>nCellZ) continue;
548 Float_t zg = (Float_t)(iz-nz3) - zc;
a3dfe79c 549 for (Int_t ix=1; ix<=kNgamx; ix++) {
fa412d9b 550 Int_t kxg = ixcell + ix - nx3;
551 if (kxg<=0 || kxg>nCellX) continue;
552 Float_t xg = (Float_t)(ix-nx3) - xc;
553
554 // Now calculate pad response
555 Float_t qpad = CPVPadResponseFunction(qhit,zg,xg);
a3dfe79c 556 qpad += kNoise*rnor2;
fa412d9b 557 if (qpad<0) continue;
558
559 // Fill the array with pad response ID and amplitude
3d402178 560 new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad);
fa412d9b 561 }
fa412d9b 562 }
fa412d9b 563 }
564}
565
566//____________________________________________________________________________
567Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) {
568 // ------------------------------------------------------------------------
569 // Calculate the amplitude in one CPV pad using the
570 // cumulative pad response function
571 // Author: Yuri Kharlov (after Serguei Sadovski)
572 // 3 October 2000
573 // ------------------------------------------------------------------------
574
fa7cce36 575 Double_t dz = GetGeometry()->GetPadSizeZ() / 2;
576 Double_t dx = GetGeometry()->GetPadSizePhi() / 2;
577 Double_t z = zhit * GetGeometry()->GetPadSizeZ();
578 Double_t x = xhit * GetGeometry()->GetPadSizePhi();
fa412d9b 579 Double_t amplitude = qhit *
580 (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) -
581 CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx));
582 return (Float_t)amplitude;
7587f5a5 583}
584
fa412d9b 585//____________________________________________________________________________
586Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) {
587 // ------------------------------------------------------------------------
588 // Cumulative pad response function
589 // It includes several terms from the CF decomposition in electrostatics
590 // Note: this cumulative function is wrong since omits some terms
591 // but the cell amplitude obtained with it is correct because
592 // these omitting terms cancel
593 // Author: Yuri Kharlov (after Serguei Sadovski)
594 // 3 October 2000
595 // ------------------------------------------------------------------------
596
a3dfe79c 597 const Double_t kA=1.0;
598 const Double_t kB=0.7;
fa412d9b 599
600 Double_t r2 = x*x + y*y;
601 Double_t xy = x*y;
602 Double_t cumulPRF = 0;
603 for (Int_t i=0; i<=4; i++) {
a3dfe79c 604 Double_t b1 = (2*i + 1) * kB;
fa412d9b 605 cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) );
606 }
a3dfe79c 607 cumulPRF *= kA/(2*TMath::Pi());
fa412d9b 608 return cumulPRF;
609}
7eb9d12d 610