First attempt to use systemtically TFolders: the geometry object posts itself to...
[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. *
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8 * documentation strictly for non-commercial purposes is hereby granted *
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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"
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{
5f20d3fb 67 // ctor
7b326aac 68
bea63bea 69}
70
71//____________________________________________________________________________
7587f5a5 72AliPHOSv1::AliPHOSv1(const char *name, const char *title):
7b326aac 73 AliPHOSv0(name,title)
7587f5a5 74{
5f20d3fb 75 // ctor : title is used to identify the layout
fa412d9b 76 // GPS2 = 5 modules (EMC + PPSD)
77 // IHEP = 5 modules (EMC + CPV )
ed4205d8 78 // MIXT = 4 modules (EMC + CPV ) and 1 module (EMC + PPSD)
5f20d3fb 79 //
ed4205d8 80 // We store hits :
5f20d3fb 81 // - fHits (the "normal" one), which retains the hits associated with
82 // the current primary particle being tracked
83 // (this array is reset after each primary has been tracked).
84 //
fa412d9b 85
037cc66d 86
5f20d3fb 87
88 // We do not want to save in TreeH the raw hits
89 // But save the cumulated hits instead (need to create the branch myself)
90 // It is put in the Digit Tree because the TreeH is filled after each primary
7b326aac 91 // and the TreeD at the end of the event (branch is set in FinishEvent() ).
5f20d3fb 92
ed4205d8 93 fHits= new TClonesArray("AliPHOSHit",1000) ;
5f20d3fb 94
ed4205d8 95 fNhits = 0 ;
5f20d3fb 96
5f20d3fb 97 fIshunt = 1 ; // All hits are associated with primary particles
7b326aac 98
fa7cce36 99 Int_t nb = GetGeometry()->GetNModules() ;
fa412d9b 100
7b326aac 101 // create checkables
102 fQAHitsMul = new AliPHOSQAIntCheckable("HitsM") ;
103 fQATotEner = new AliPHOSQAFloatCheckable("TotEn") ;
104 fQAHitsMulB = new TClonesArray("AliPHOSQAIntCheckable",nb) ;
105 fQATotEnerB = new TClonesArray("AliPHOSQAFloatCheckable", nb);
106 char tempo[20] ;
107 Int_t i ;
108 for ( i = 0 ; i < nb ; i++ ) {
109 sprintf(tempo, "HitsMB%d", i+1) ;
110 new( (*fQAHitsMulB)[i]) AliPHOSQAIntCheckable(tempo) ;
111 sprintf(tempo, "TotEnB%d", i+1) ;
112 new( (*fQATotEnerB)[i] ) AliPHOSQAFloatCheckable(tempo) ;
113 }
114
7b326aac 115 AliPHOSQAMeanChecker * hmc = new AliPHOSQAMeanChecker("HitsMul", 100. ,25.) ;
116 AliPHOSQAMeanChecker * emc = new AliPHOSQAMeanChecker("TotEner", 10. ,5.) ;
117 AliPHOSQAMeanChecker * bhmc = new AliPHOSQAMeanChecker("HitsMulB", 100. ,5.) ;
118 AliPHOSQAMeanChecker * bemc = new AliPHOSQAMeanChecker("TotEnerB", 2. ,.5) ;
119
120 // associate checkables and checkers
121 fQAHitsMul->AddChecker(hmc) ;
122 fQATotEner->AddChecker(emc) ;
123 for ( i = 0 ; i < nb ; i++ ) {
124 ((AliPHOSQAIntCheckable*)(*fQAHitsMulB)[i])->AddChecker(bhmc) ;
125 ((AliPHOSQAFloatCheckable*)(*fQATotEnerB)[i])->AddChecker(bemc) ;
126 }
5f20d3fb 127}
128
129//____________________________________________________________________________
bea63bea 130AliPHOSv1::~AliPHOSv1()
b2a60966 131{
bea63bea 132 // dtor
5f20d3fb 133
ed4205d8 134 if ( fHits) {
135 fHits->Delete() ;
136 delete fHits ;
137 fHits = 0 ;
8dfa469d 138 }
7587f5a5 139}
140
141//____________________________________________________________________________
b37750a6 142void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits)
bea63bea 143{
144 // Add a hit to the hit list.
5f20d3fb 145 // A PHOS hit is the sum of all hits in a single crystal
146 // or in a single PPSD gas cell
bea63bea 147
5f20d3fb 148 Int_t hitCounter ;
bea63bea 149 AliPHOSHit *newHit ;
5f20d3fb 150 AliPHOSHit *curHit ;
151 Bool_t deja = kFALSE ;
fa7cce36 152 AliPHOSGeometry * geom = GetGeometry() ;
bea63bea 153
b37750a6 154 newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ;
bea63bea 155
7854a24a 156 for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) {
ed4205d8 157 curHit = (AliPHOSHit*) (*fHits)[hitCounter] ;
4e669ac8 158 if(curHit->GetPrimary() != primary) break ; // We add hits with the same primary, while GEANT treats primaries succesively
ed4205d8 159 if( *curHit == *newHit ) {
160 *curHit = *curHit + *newHit ;
161 deja = kTRUE ;
5f20d3fb 162 }
163 }
164
165 if ( !deja ) {
ed4205d8 166 new((*fHits)[fNhits]) AliPHOSHit(*newHit) ;
7b326aac 167 // get the block Id number
fa7cce36 168 Int_t * relid = new Int_t[geom->GetNModules()] ;
169 geom->AbsToRelNumbering(Id, relid) ;
7b326aac 170 // and fill the relevant QA checkable (only if in PbW04)
171 if ( relid[1] == 0 ) {
172 fQAHitsMul->Update(1) ;
173 ((AliPHOSQAIntCheckable*)(*fQAHitsMulB)[relid[0]-1])->Update(1) ;
174 }
175 delete relid ;
ed4205d8 176 fNhits++ ;
5f20d3fb 177 }
178
bea63bea 179 delete newHit;
bea63bea 180}
181
ed4205d8 182//____________________________________________________________________________
7b326aac 183void AliPHOSv1::FinishPrimary()
184{
185 // called at the end of each track (primary) by AliRun
186 // hits are reset for each new track
187 // accumulate the total hit-multiplicity
188// if ( fQAHitsMul )
189// fQAHitsMul->Update( fHits->GetEntriesFast() ) ;
190
191}
192
193//____________________________________________________________________________
194void AliPHOSv1::FinishEvent()
195{
196 // called at the end of each event by AliRun
197 // accumulate the hit-multiplicity and total energy per block
198 // if the values have been updated check it
199
200 if ( fQATotEner ) {
201 if ( fQATotEner->HasChanged() ) {
202 fQATotEner->CheckMe() ;
203 fQATotEner->Reset() ;
204 }
205 }
206
207 Int_t i ;
208 if ( fQAHitsMulB && fQATotEnerB ) {
fa7cce36 209 for (i = 0 ; i < GetGeometry()->GetNModules() ; i++) {
7b326aac 210 AliPHOSQAIntCheckable * ci = (AliPHOSQAIntCheckable*)(*fQAHitsMulB)[i] ;
211 AliPHOSQAFloatCheckable* cf = (AliPHOSQAFloatCheckable*)(*fQATotEnerB)[i] ;
212 if ( ci->HasChanged() ) {
213 ci->CheckMe() ;
214 ci->Reset() ;
215 }
216 if ( cf->HasChanged() ) {
217 cf->CheckMe() ;
218 cf->Reset() ;
219 }
220 }
221 }
222
223 // check the total multiplicity
224
225 if ( fQAHitsMul ) {
226 if ( fQAHitsMul->HasChanged() ) {
227 fQAHitsMul->CheckMe() ;
228 fQAHitsMul->Reset() ;
229 }
230 }
231}
232
233//____________________________________________________________________________
7587f5a5 234void AliPHOSv1::StepManager(void)
235{
b2a60966 236 // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell
b2a60966 237
4f5bbbd4 238 Int_t relid[4] ; // (box, layer, row, column) indices
239 Int_t absid ; // absolute cell ID number
2168f43b 240 Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited
4f5bbbd4 241 TLorentzVector pos ; // Lorentz vector of the track current position
fa412d9b 242 Int_t copy ;
7587f5a5 243
bea63bea 244 Int_t tracknumber = gAlice->CurrentTrack() ;
fa412d9b 245 Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() );
fa7cce36 246 TString name = GetGeometry()->GetName() ;
037cc66d 247
248
ed4205d8 249 if ( name == "GPS2" || name == "MIXT" ) { // ======> CPV is a GPS' PPSD
fa412d9b 250
dc999bc0 251 if( gMC->CurrentVolID(copy) == gMC->VolId("PPCE") ) // We are inside a gas cell
7587f5a5 252 {
253 gMC->TrackPosition(pos) ;
254 xyze[0] = pos[0] ;
255 xyze[1] = pos[1] ;
256 xyze[2] = pos[2] ;
bea63bea 257 xyze[3] = gMC->Edep() ;
7587f5a5 258
b37750a6 259 if ( xyze[3] != 0 ) { // there is deposited energy
7587f5a5 260 gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number
fad3e5b9 261 if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ){
fa7cce36 262 relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules();
fad3e5b9 263 }
7587f5a5 264 gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number
fa7cce36 265 // 1-> GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() upper
266 // > GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() lower
7587f5a5 267 gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell
268 gMC->CurrentVolID(relid[3]) ; // get the column number
269
270 // get the absolute Id number
271
fa7cce36 272 GetGeometry()->RelToAbsNumbering(relid, absid) ;
7587f5a5 273
bea63bea 274 // add current hit to the hit list
b37750a6 275 AddHit(fIshunt, primary, tracknumber, absid, xyze);
037cc66d 276
7587f5a5 277
278 } // there is deposited energy
fa412d9b 279 } // We are inside the gas of the CPV
280 } // GPS2 configuration
281
ed4205d8 282 if ( name == "IHEP" || name == "MIXT" ) { // ======> CPV is a IHEP's one
fa412d9b 283
284 // Yuri Kharlov, 28 September 2000
285
97cee223 286 if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") &&
b37750a6 287 (gMC->IsTrackEntering() ) &&
037cc66d 288 gMC->TrackCharge() != 0) {
fa412d9b 289
b37750a6 290 gMC -> TrackPosition(pos);
291 Float_t xyzm[3], xyzd[3] ;
292 Int_t i;
293 for (i=0; i<3; i++) xyzm[i] = pos[i];
294 gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system
295
296 Float_t xyd[3]={0,0,0} ; //local posiiton of the entering
297 xyd[0] = xyzd[0];
298 xyd[1] =-xyzd[1];
299 xyd[2] =-xyzd[2];
300
301
302 // Current momentum of the hit's track in the local ref. system
303 TLorentzVector pmom ; //momentum of the particle initiated hit
304 gMC -> TrackMomentum(pmom);
305 Float_t pm[3], pd[3];
306 for (i=0; i<3; i++) pm[i] = pmom[i];
307 gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system
308 pmom[0] = pd[0];
309 pmom[1] =-pd[1];
310 pmom[2] =-pd[2];
311
037cc66d 312 // Digitize the current CPV hit:
313
314 // 1. find pad response and
fa412d9b 315
a3dfe79c 316 Int_t moduleNumber;
317 gMC->CurrentVolOffID(3,moduleNumber);
318 moduleNumber--;
fa412d9b 319
fa412d9b 320
3d402178 321 TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit
a3dfe79c 322 CPVDigitize(pmom,xyd,moduleNumber,cpvDigits);
fa412d9b 323
324 Float_t xmean = 0;
325 Float_t zmean = 0;
326 Float_t qsum = 0;
cd461ab8 327 Int_t idigit,ndigits;
fa412d9b 328
329 // 2. go through the current digit list and sum digits in pads
330
331 ndigits = cpvDigits->GetEntriesFast();
cd461ab8 332 for (idigit=0; idigit<ndigits-1; idigit++) {
3d402178 333 AliPHOSCPVDigit *cpvDigit1 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit);
fa412d9b 334 Float_t x1 = cpvDigit1->GetXpad() ;
335 Float_t z1 = cpvDigit1->GetYpad() ;
336 for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) {
3d402178 337 AliPHOSCPVDigit *cpvDigit2 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(jdigit);
fa412d9b 338 Float_t x2 = cpvDigit2->GetXpad() ;
339 Float_t z2 = cpvDigit2->GetYpad() ;
340 if (x1==x2 && z1==z2) {
341 Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ;
342 cpvDigit2->SetQpad(qsum) ;
343 cpvDigits->RemoveAt(idigit) ;
344 }
345 }
346 }
347 cpvDigits->Compress() ;
348
349 // 3. add digits to temporary hit list fTmpHits
350
351 ndigits = cpvDigits->GetEntriesFast();
cd461ab8 352 for (idigit=0; idigit<ndigits; idigit++) {
3d402178 353 AliPHOSCPVDigit *cpvDigit = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit);
a3dfe79c 354 relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number
fa412d9b 355 relid[1] =-1 ; // means CPV
356 relid[2] = cpvDigit->GetXpad() ; // column number of a pad
357 relid[3] = cpvDigit->GetYpad() ; // row number of a pad
358
359 // get the absolute Id number
fa7cce36 360 GetGeometry()->RelToAbsNumbering(relid, absid) ;
fa412d9b 361
362 // add current digit to the temporary hit list
363 xyze[0] = 0. ;
364 xyze[1] = 0. ;
365 xyze[2] = 0. ;
366 xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad
367 primary = -1; // No need in primary for CPV
b37750a6 368 AddHit(fIshunt, primary, tracknumber, absid, xyze);
fa412d9b 369
370 if (cpvDigit->GetQpad() > 0.02) {
371 xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5);
372 zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5);
373 qsum += cpvDigit->GetQpad();
374 }
375 }
376 delete cpvDigits;
377 }
378 } // end of IHEP configuration
7587f5a5 379
037cc66d 380
fa412d9b 381 if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal
382 gMC->TrackPosition(pos) ;
383 xyze[0] = pos[0] ;
384 xyze[1] = pos[1] ;
385 xyze[2] = pos[2] ;
386 xyze[3] = gMC->Edep() ;
ed4205d8 387
037cc66d 388
b37750a6 389 if ( xyze[3] != 0 ) { // Track is inside the crystal and deposits some energy
ed4205d8 390
fa412d9b 391 gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ;
7b326aac 392
393 // fill the relevant QA Checkables
394 fQATotEner->Update( xyze[3] ) ; // total energy in PHOS
395 ((AliPHOSQAFloatCheckable*)(*fQATotEnerB)[relid[0]-1])->Update( xyze[3] ) ; // energy in this block
037cc66d 396
fad3e5b9 397 if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(10),"PHO1") == 0 )
fa7cce36 398 relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules();
fad3e5b9 399
fa412d9b 400 relid[1] = 0 ; // means PBW04
401 gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module
402 gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module
403
404 // get the absolute Id number
fa7cce36 405 GetGeometry()->RelToAbsNumbering(relid, absid) ;
ed4205d8 406
fa412d9b 407 // add current hit to the hit list
b37750a6 408 AddHit(fIshunt, primary,tracknumber, absid, xyze);
037cc66d 409
ed4205d8 410
fa412d9b 411 } // there is deposited energy
412 } // we are inside a PHOS Xtal
413}
414
415//____________________________________________________________________________
416void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits)
417{
418 // ------------------------------------------------------------------------
419 // Digitize one CPV hit:
420 // On input take exact 4-momentum p and position zxhit of the hit,
421 // find the pad response around this hit and
422 // put the amplitudes in the pads into array digits
423 //
424 // Author: Yuri Kharlov (after Serguei Sadovsky)
425 // 2 October 2000
426 // ------------------------------------------------------------------------
427
fa7cce36 428 const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad)
a3dfe79c 429 const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e-
430 const Float_t kdEdx = 4.0; // Average energy loss in CPV;
431 const Int_t kNgamz = 5; // Ionization size in Z
432 const Int_t kNgamx = 9; // Ionization size in Phi
433 const Float_t kNoise = 0.03; // charge noise in one pad
fa412d9b 434
435 Float_t rnor1,rnor2;
436
437 // Just a reminder on axes notation in the CPV module:
438 // axis Z goes along the beam
439 // axis X goes across the beam in the module plane
440 // axis Y is a normal to the module plane showing from the IP
441
442 Float_t hitX = zxhit[0];
443 Float_t hitZ =-zxhit[1];
444 Float_t pX = p.Px();
445 Float_t pZ =-p.Pz();
446 Float_t pNorm = p.Py();
a3dfe79c 447 Float_t eloss = kdEdx;
3d402178 448
7b326aac 449// cout << "CPVDigitize: YVK : "<<hitX<<" "<<hitZ<<" | "<<pX<<" "<<pZ<<" "<<pNorm<<endl;
450
fa7cce36 451 Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness();
452 Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness();
fa412d9b 453 gRandom->Rannor(rnor1,rnor2);
a3dfe79c 454 eloss *= (1 + kDetR*rnor1) *
fa7cce36 455 TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2)));
456 Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2;
457 Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2;
fa412d9b 458 Float_t zhit2 = zhit1 + dZY;
459 Float_t xhit2 = xhit1 + dXY;
460
a3dfe79c 461 Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in"
462 Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out"
fa412d9b 463
464 Int_t nIter;
465 Float_t zxe[3][5];
466 if (iwht1==iwht2) { // incline 1-wire hit
467 nIter = 2;
468 zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2;
a3dfe79c 469 zxe[1][0] = (iwht1 + 0.5) * kCelWr;
470 zxe[2][0] = eloss/2;
fa412d9b 471 zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2;
a3dfe79c 472 zxe[1][1] = (iwht1 + 0.5) * kCelWr;
473 zxe[2][1] = eloss/2;
fa412d9b 474 }
475 else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit
476 nIter = 3;
477 Int_t iwht3 = (iwht1 + iwht2) / 2;
a3dfe79c 478 Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1
479 Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2
480 Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3
fa412d9b 481 Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13
482 Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23
483 Float_t dxw1 = xhit1 - xwr13;
484 Float_t dxw2 = xhit2 - xwr23;
a3dfe79c 485 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
486 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
487 Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
fa412d9b 488 zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2;
489 zxe[1][0] = xwht1;
a3dfe79c 490 zxe[2][0] = eloss * egm1;
fa412d9b 491 zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2;
492 zxe[1][1] = xwht2;
a3dfe79c 493 zxe[2][1] = eloss * egm2;
fa412d9b 494 zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1;
495 zxe[1][2] = xwht3;
a3dfe79c 496 zxe[2][2] = eloss * egm3;
fa412d9b 497 }
498 else { // incline 2-wire hit
499 nIter = 2;
a3dfe79c 500 Float_t xwht1 = (iwht1 + 0.5) * kCelWr;
501 Float_t xwht2 = (iwht2 + 0.5) * kCelWr;
fa412d9b 502 Float_t xwr12 = (xwht1 + xwht2) / 2;
503 Float_t dxw1 = xhit1 - xwr12;
504 Float_t dxw2 = xhit2 - xwr12;
505 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
506 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
507 zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2;
508 zxe[1][0] = xwht1;
a3dfe79c 509 zxe[2][0] = eloss * egm1;
fa412d9b 510 zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2;
511 zxe[1][1] = xwht2;
a3dfe79c 512 zxe[2][1] = eloss * egm2;
fa412d9b 513 }
bea63bea 514
fa412d9b 515 // Finite size of ionization region
516
fa7cce36 517 Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ();
518 Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi();
a3dfe79c 519 Int_t nz3 = (kNgamz+1)/2;
520 Int_t nx3 = (kNgamx+1)/2;
521 cpvDigits->Expand(nIter*kNgamx*kNgamz);
fa412d9b 522 TClonesArray &ldigits = *(TClonesArray *)cpvDigits;
523
524 for (Int_t iter=0; iter<nIter; iter++) {
525
526 Float_t zhit = zxe[0][iter];
527 Float_t xhit = zxe[1][iter];
528 Float_t qhit = zxe[2][iter];
fa7cce36 529 Float_t zcell = zhit / GetGeometry()->GetPadSizeZ();
530 Float_t xcell = xhit / GetGeometry()->GetPadSizePhi();
fa412d9b 531 if ( zcell<=0 || xcell<=0 ||
532 zcell>=nCellZ || xcell>=nCellX) return;
533 Int_t izcell = (Int_t) zcell;
534 Int_t ixcell = (Int_t) xcell;
535 Float_t zc = zcell - izcell - 0.5;
536 Float_t xc = xcell - ixcell - 0.5;
a3dfe79c 537 for (Int_t iz=1; iz<=kNgamz; iz++) {
fa412d9b 538 Int_t kzg = izcell + iz - nz3;
539 if (kzg<=0 || kzg>nCellZ) continue;
540 Float_t zg = (Float_t)(iz-nz3) - zc;
a3dfe79c 541 for (Int_t ix=1; ix<=kNgamx; ix++) {
fa412d9b 542 Int_t kxg = ixcell + ix - nx3;
543 if (kxg<=0 || kxg>nCellX) continue;
544 Float_t xg = (Float_t)(ix-nx3) - xc;
545
546 // Now calculate pad response
547 Float_t qpad = CPVPadResponseFunction(qhit,zg,xg);
a3dfe79c 548 qpad += kNoise*rnor2;
fa412d9b 549 if (qpad<0) continue;
550
551 // Fill the array with pad response ID and amplitude
3d402178 552 new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad);
fa412d9b 553 }
fa412d9b 554 }
fa412d9b 555 }
556}
557
558//____________________________________________________________________________
559Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) {
560 // ------------------------------------------------------------------------
561 // Calculate the amplitude in one CPV pad using the
562 // cumulative pad response function
563 // Author: Yuri Kharlov (after Serguei Sadovski)
564 // 3 October 2000
565 // ------------------------------------------------------------------------
566
fa7cce36 567 Double_t dz = GetGeometry()->GetPadSizeZ() / 2;
568 Double_t dx = GetGeometry()->GetPadSizePhi() / 2;
569 Double_t z = zhit * GetGeometry()->GetPadSizeZ();
570 Double_t x = xhit * GetGeometry()->GetPadSizePhi();
fa412d9b 571 Double_t amplitude = qhit *
572 (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) -
573 CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx));
574 return (Float_t)amplitude;
7587f5a5 575}
576
fa412d9b 577//____________________________________________________________________________
578Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) {
579 // ------------------------------------------------------------------------
580 // Cumulative pad response function
581 // It includes several terms from the CF decomposition in electrostatics
582 // Note: this cumulative function is wrong since omits some terms
583 // but the cell amplitude obtained with it is correct because
584 // these omitting terms cancel
585 // Author: Yuri Kharlov (after Serguei Sadovski)
586 // 3 October 2000
587 // ------------------------------------------------------------------------
588
a3dfe79c 589 const Double_t kA=1.0;
590 const Double_t kB=0.7;
fa412d9b 591
592 Double_t r2 = x*x + y*y;
593 Double_t xy = x*y;
594 Double_t cumulPRF = 0;
595 for (Int_t i=0; i<=4; i++) {
a3dfe79c 596 Double_t b1 = (2*i + 1) * kB;
fa412d9b 597 cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) );
598 }
a3dfe79c 599 cumulPRF *= kA/(2*TMath::Pi());
fa412d9b 600 return cumulPRF;
601}
7eb9d12d 602