Unecessary copy of AliPHOSHit object has been removed from AddHit member function...
[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"
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
bea63bea 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 ;
bea63bea 72}
73
7587f5a5 74//____________________________________________________________________________
75AliPHOSv1::AliPHOSv1(const char *name, const char *title):
7b326aac 76 AliPHOSv0(name,title)
7587f5a5 77{
5f20d3fb 78 // ctor : title is used to identify the layout
fa412d9b 79 // GPS2 = 5 modules (EMC + PPSD)
80 // IHEP = 5 modules (EMC + CPV )
ed4205d8 81 // MIXT = 4 modules (EMC + CPV ) and 1 module (EMC + PPSD)
5f20d3fb 82 //
ed4205d8 83 // We store hits :
5f20d3fb 84 // - fHits (the "normal" one), which retains the hits associated with
85 // the current primary particle being tracked
86 // (this array is reset after each primary has been tracked).
87 //
fa412d9b 88
037cc66d 89
5f20d3fb 90
91 // We do not want to save in TreeH the raw hits
92 // But save the cumulated hits instead (need to create the branch myself)
93 // It is put in the Digit Tree because the TreeH is filled after each primary
7b326aac 94 // and the TreeD at the end of the event (branch is set in FinishEvent() ).
5f20d3fb 95
ed4205d8 96 fHits= new TClonesArray("AliPHOSHit",1000) ;
5f20d3fb 97
ed4205d8 98 fNhits = 0 ;
5f20d3fb 99
5f20d3fb 100 fIshunt = 1 ; // All hits are associated with primary particles
7b326aac 101
fa7cce36 102 Int_t nb = GetGeometry()->GetNModules() ;
fa412d9b 103
7b326aac 104 // create checkables
105 fQAHitsMul = new AliPHOSQAIntCheckable("HitsM") ;
106 fQATotEner = new AliPHOSQAFloatCheckable("TotEn") ;
107 fQAHitsMulB = new TClonesArray("AliPHOSQAIntCheckable",nb) ;
108 fQATotEnerB = new TClonesArray("AliPHOSQAFloatCheckable", nb);
109 char tempo[20] ;
110 Int_t i ;
111 for ( i = 0 ; i < nb ; i++ ) {
112 sprintf(tempo, "HitsMB%d", i+1) ;
113 new( (*fQAHitsMulB)[i]) AliPHOSQAIntCheckable(tempo) ;
114 sprintf(tempo, "TotEnB%d", i+1) ;
115 new( (*fQATotEnerB)[i] ) AliPHOSQAFloatCheckable(tempo) ;
116 }
117
7b326aac 118 AliPHOSQAMeanChecker * hmc = new AliPHOSQAMeanChecker("HitsMul", 100. ,25.) ;
119 AliPHOSQAMeanChecker * emc = new AliPHOSQAMeanChecker("TotEner", 10. ,5.) ;
120 AliPHOSQAMeanChecker * bhmc = new AliPHOSQAMeanChecker("HitsMulB", 100. ,5.) ;
121 AliPHOSQAMeanChecker * bemc = new AliPHOSQAMeanChecker("TotEnerB", 2. ,.5) ;
122
123 // associate checkables and checkers
124 fQAHitsMul->AddChecker(hmc) ;
125 fQATotEner->AddChecker(emc) ;
126 for ( i = 0 ; i < nb ; i++ ) {
127 ((AliPHOSQAIntCheckable*)(*fQAHitsMulB)[i])->AddChecker(bhmc) ;
128 ((AliPHOSQAFloatCheckable*)(*fQATotEnerB)[i])->AddChecker(bemc) ;
129 }
7b7c1533 130
5f20d3fb 131}
132
7587f5a5 133//____________________________________________________________________________
bea63bea 134AliPHOSv1::~AliPHOSv1()
b2a60966 135{
bea63bea 136 // dtor
5f20d3fb 137
ed4205d8 138 if ( fHits) {
139 fHits->Delete() ;
140 delete fHits ;
141 fHits = 0 ;
8dfa469d 142 }
7b7c1533 143 if (fTreeQA)
144 delete fTreeQA ;
7587f5a5 145}
146
7587f5a5 147//____________________________________________________________________________
b37750a6 148void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits)
bea63bea 149{
150 // Add a hit to the hit list.
5f20d3fb 151 // A PHOS hit is the sum of all hits in a single crystal
152 // or in a single PPSD gas cell
bea63bea 153
5f20d3fb 154 Int_t hitCounter ;
bea63bea 155 AliPHOSHit *newHit ;
5f20d3fb 156 AliPHOSHit *curHit ;
157 Bool_t deja = kFALSE ;
fa7cce36 158 AliPHOSGeometry * geom = GetGeometry() ;
bea63bea 159
b37750a6 160 newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ;
bea63bea 161
7854a24a 162 for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) {
ed4205d8 163 curHit = (AliPHOSHit*) (*fHits)[hitCounter] ;
4e669ac8 164 if(curHit->GetPrimary() != primary) break ; // We add hits with the same primary, while GEANT treats primaries succesively
ed4205d8 165 if( *curHit == *newHit ) {
f15a01eb 166 *curHit + *newHit ;
ed4205d8 167 deja = kTRUE ;
5f20d3fb 168 }
169 }
170
171 if ( !deja ) {
ed4205d8 172 new((*fHits)[fNhits]) AliPHOSHit(*newHit) ;
7b326aac 173 // get the block Id number
fa7cce36 174 Int_t * relid = new Int_t[geom->GetNModules()] ;
175 geom->AbsToRelNumbering(Id, relid) ;
7b326aac 176 // and fill the relevant QA checkable (only if in PbW04)
177 if ( relid[1] == 0 ) {
178 fQAHitsMul->Update(1) ;
179 ((AliPHOSQAIntCheckable*)(*fQAHitsMulB)[relid[0]-1])->Update(1) ;
180 }
181 delete relid ;
ed4205d8 182 fNhits++ ;
5f20d3fb 183 }
184
bea63bea 185 delete newHit;
bea63bea 186}
187
7b326aac 188//____________________________________________________________________________
189void AliPHOSv1::FinishPrimary()
190{
191 // called at the end of each track (primary) by AliRun
192 // hits are reset for each new track
193 // accumulate the total hit-multiplicity
194// if ( fQAHitsMul )
195// fQAHitsMul->Update( fHits->GetEntriesFast() ) ;
196
197}
198
199//____________________________________________________________________________
200void AliPHOSv1::FinishEvent()
201{
202 // called at the end of each event by AliRun
203 // accumulate the hit-multiplicity and total energy per block
204 // if the values have been updated check it
205
206 if ( fQATotEner ) {
207 if ( fQATotEner->HasChanged() ) {
208 fQATotEner->CheckMe() ;
209 fQATotEner->Reset() ;
210 }
211 }
212
213 Int_t i ;
214 if ( fQAHitsMulB && fQATotEnerB ) {
fa7cce36 215 for (i = 0 ; i < GetGeometry()->GetNModules() ; i++) {
7b326aac 216 AliPHOSQAIntCheckable * ci = (AliPHOSQAIntCheckable*)(*fQAHitsMulB)[i] ;
217 AliPHOSQAFloatCheckable* cf = (AliPHOSQAFloatCheckable*)(*fQATotEnerB)[i] ;
218 if ( ci->HasChanged() ) {
219 ci->CheckMe() ;
220 ci->Reset() ;
221 }
222 if ( cf->HasChanged() ) {
223 cf->CheckMe() ;
224 cf->Reset() ;
225 }
226 }
227 }
228
229 // check the total multiplicity
230
231 if ( fQAHitsMul ) {
232 if ( fQAHitsMul->HasChanged() ) {
233 fQAHitsMul->CheckMe() ;
234 fQAHitsMul->Reset() ;
235 }
236 }
237}
238
5f20d3fb 239//____________________________________________________________________________
7587f5a5 240void AliPHOSv1::StepManager(void)
241{
7b7c1533 242
b2a60966 243 // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell
b2a60966 244
4f5bbbd4 245 Int_t relid[4] ; // (box, layer, row, column) indices
246 Int_t absid ; // absolute cell ID number
2168f43b 247 Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited
4f5bbbd4 248 TLorentzVector pos ; // Lorentz vector of the track current position
fa412d9b 249 Int_t copy ;
7587f5a5 250
bea63bea 251 Int_t tracknumber = gAlice->CurrentTrack() ;
fa412d9b 252 Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() );
fa7cce36 253 TString name = GetGeometry()->GetName() ;
037cc66d 254
255
ed4205d8 256 if ( name == "GPS2" || name == "MIXT" ) { // ======> CPV is a GPS' PPSD
fa412d9b 257
dc999bc0 258 if( gMC->CurrentVolID(copy) == gMC->VolId("PPCE") ) // We are inside a gas cell
7587f5a5 259 {
260 gMC->TrackPosition(pos) ;
261 xyze[0] = pos[0] ;
262 xyze[1] = pos[1] ;
263 xyze[2] = pos[2] ;
bea63bea 264 xyze[3] = gMC->Edep() ;
7587f5a5 265
b37750a6 266 if ( xyze[3] != 0 ) { // there is deposited energy
7587f5a5 267 gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number
fad3e5b9 268 if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ){
fa7cce36 269 relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules();
fad3e5b9 270 }
7587f5a5 271 gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number
fa7cce36 272 // 1-> GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() upper
273 // > GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() lower
7587f5a5 274 gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell
275 gMC->CurrentVolID(relid[3]) ; // get the column number
276
277 // get the absolute Id number
278
fa7cce36 279 GetGeometry()->RelToAbsNumbering(relid, absid) ;
7587f5a5 280
bea63bea 281 // add current hit to the hit list
b37750a6 282 AddHit(fIshunt, primary, tracknumber, absid, xyze);
037cc66d 283
7587f5a5 284
285 } // there is deposited energy
fa412d9b 286 } // We are inside the gas of the CPV
287 } // GPS2 configuration
288
ed4205d8 289 if ( name == "IHEP" || name == "MIXT" ) { // ======> CPV is a IHEP's one
fa412d9b 290
291 // Yuri Kharlov, 28 September 2000
292
97cee223 293 if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") &&
b37750a6 294 (gMC->IsTrackEntering() ) &&
037cc66d 295 gMC->TrackCharge() != 0) {
fa412d9b 296
b37750a6 297 gMC -> TrackPosition(pos);
298 Float_t xyzm[3], xyzd[3] ;
299 Int_t i;
300 for (i=0; i<3; i++) xyzm[i] = pos[i];
301 gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system
302
303 Float_t xyd[3]={0,0,0} ; //local posiiton of the entering
304 xyd[0] = xyzd[0];
305 xyd[1] =-xyzd[1];
306 xyd[2] =-xyzd[2];
307
308
309 // Current momentum of the hit's track in the local ref. system
310 TLorentzVector pmom ; //momentum of the particle initiated hit
311 gMC -> TrackMomentum(pmom);
312 Float_t pm[3], pd[3];
313 for (i=0; i<3; i++) pm[i] = pmom[i];
314 gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system
315 pmom[0] = pd[0];
316 pmom[1] =-pd[1];
317 pmom[2] =-pd[2];
318
037cc66d 319 // Digitize the current CPV hit:
320
321 // 1. find pad response and
fa412d9b 322
a3dfe79c 323 Int_t moduleNumber;
324 gMC->CurrentVolOffID(3,moduleNumber);
325 moduleNumber--;
fa412d9b 326
fa412d9b 327
3d402178 328 TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit
a3dfe79c 329 CPVDigitize(pmom,xyd,moduleNumber,cpvDigits);
fa412d9b 330
331 Float_t xmean = 0;
332 Float_t zmean = 0;
333 Float_t qsum = 0;
cd461ab8 334 Int_t idigit,ndigits;
fa412d9b 335
336 // 2. go through the current digit list and sum digits in pads
337
338 ndigits = cpvDigits->GetEntriesFast();
cd461ab8 339 for (idigit=0; idigit<ndigits-1; idigit++) {
3d402178 340 AliPHOSCPVDigit *cpvDigit1 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit);
fa412d9b 341 Float_t x1 = cpvDigit1->GetXpad() ;
342 Float_t z1 = cpvDigit1->GetYpad() ;
343 for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) {
3d402178 344 AliPHOSCPVDigit *cpvDigit2 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(jdigit);
fa412d9b 345 Float_t x2 = cpvDigit2->GetXpad() ;
346 Float_t z2 = cpvDigit2->GetYpad() ;
347 if (x1==x2 && z1==z2) {
348 Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ;
349 cpvDigit2->SetQpad(qsum) ;
350 cpvDigits->RemoveAt(idigit) ;
351 }
352 }
353 }
354 cpvDigits->Compress() ;
355
356 // 3. add digits to temporary hit list fTmpHits
357
358 ndigits = cpvDigits->GetEntriesFast();
cd461ab8 359 for (idigit=0; idigit<ndigits; idigit++) {
3d402178 360 AliPHOSCPVDigit *cpvDigit = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit);
a3dfe79c 361 relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number
fa412d9b 362 relid[1] =-1 ; // means CPV
363 relid[2] = cpvDigit->GetXpad() ; // column number of a pad
364 relid[3] = cpvDigit->GetYpad() ; // row number of a pad
365
366 // get the absolute Id number
fa7cce36 367 GetGeometry()->RelToAbsNumbering(relid, absid) ;
fa412d9b 368
369 // add current digit to the temporary hit list
370 xyze[0] = 0. ;
371 xyze[1] = 0. ;
372 xyze[2] = 0. ;
373 xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad
374 primary = -1; // No need in primary for CPV
b37750a6 375 AddHit(fIshunt, primary, tracknumber, absid, xyze);
fa412d9b 376
377 if (cpvDigit->GetQpad() > 0.02) {
378 xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5);
379 zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5);
380 qsum += cpvDigit->GetQpad();
381 }
382 }
383 delete cpvDigits;
384 }
385 } // end of IHEP configuration
7587f5a5 386
037cc66d 387
fa412d9b 388 if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal
389 gMC->TrackPosition(pos) ;
390 xyze[0] = pos[0] ;
391 xyze[1] = pos[1] ;
392 xyze[2] = pos[2] ;
393 xyze[3] = gMC->Edep() ;
ed4205d8 394
037cc66d 395
b37750a6 396 if ( xyze[3] != 0 ) { // Track is inside the crystal and deposits some energy
ed4205d8 397
fa412d9b 398 gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ;
7b326aac 399
400 // fill the relevant QA Checkables
401 fQATotEner->Update( xyze[3] ) ; // total energy in PHOS
402 ((AliPHOSQAFloatCheckable*)(*fQATotEnerB)[relid[0]-1])->Update( xyze[3] ) ; // energy in this block
037cc66d 403
fad3e5b9 404 if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(10),"PHO1") == 0 )
fa7cce36 405 relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules();
fad3e5b9 406
fa412d9b 407 relid[1] = 0 ; // means PBW04
408 gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module
409 gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module
410
411 // get the absolute Id number
fa7cce36 412 GetGeometry()->RelToAbsNumbering(relid, absid) ;
ed4205d8 413
fa412d9b 414 // add current hit to the hit list
b37750a6 415 AddHit(fIshunt, primary,tracknumber, absid, xyze);
037cc66d 416
ed4205d8 417
fa412d9b 418 } // there is deposited energy
419 } // we are inside a PHOS Xtal
420}
421
422//____________________________________________________________________________
423void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits)
424{
425 // ------------------------------------------------------------------------
426 // Digitize one CPV hit:
427 // On input take exact 4-momentum p and position zxhit of the hit,
428 // find the pad response around this hit and
429 // put the amplitudes in the pads into array digits
430 //
431 // Author: Yuri Kharlov (after Serguei Sadovsky)
432 // 2 October 2000
433 // ------------------------------------------------------------------------
434
fa7cce36 435 const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad)
a3dfe79c 436 const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e-
437 const Float_t kdEdx = 4.0; // Average energy loss in CPV;
438 const Int_t kNgamz = 5; // Ionization size in Z
439 const Int_t kNgamx = 9; // Ionization size in Phi
440 const Float_t kNoise = 0.03; // charge noise in one pad
fa412d9b 441
442 Float_t rnor1,rnor2;
443
444 // Just a reminder on axes notation in the CPV module:
445 // axis Z goes along the beam
446 // axis X goes across the beam in the module plane
447 // axis Y is a normal to the module plane showing from the IP
448
449 Float_t hitX = zxhit[0];
450 Float_t hitZ =-zxhit[1];
451 Float_t pX = p.Px();
452 Float_t pZ =-p.Pz();
453 Float_t pNorm = p.Py();
a3dfe79c 454 Float_t eloss = kdEdx;
3d402178 455
7b326aac 456// cout << "CPVDigitize: YVK : "<<hitX<<" "<<hitZ<<" | "<<pX<<" "<<pZ<<" "<<pNorm<<endl;
457
fa7cce36 458 Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness();
459 Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness();
fa412d9b 460 gRandom->Rannor(rnor1,rnor2);
a3dfe79c 461 eloss *= (1 + kDetR*rnor1) *
fa7cce36 462 TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2)));
463 Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2;
464 Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2;
fa412d9b 465 Float_t zhit2 = zhit1 + dZY;
466 Float_t xhit2 = xhit1 + dXY;
467
a3dfe79c 468 Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in"
469 Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out"
fa412d9b 470
471 Int_t nIter;
472 Float_t zxe[3][5];
473 if (iwht1==iwht2) { // incline 1-wire hit
474 nIter = 2;
475 zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2;
a3dfe79c 476 zxe[1][0] = (iwht1 + 0.5) * kCelWr;
477 zxe[2][0] = eloss/2;
fa412d9b 478 zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2;
a3dfe79c 479 zxe[1][1] = (iwht1 + 0.5) * kCelWr;
480 zxe[2][1] = eloss/2;
fa412d9b 481 }
482 else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit
483 nIter = 3;
484 Int_t iwht3 = (iwht1 + iwht2) / 2;
a3dfe79c 485 Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1
486 Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2
487 Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3
fa412d9b 488 Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13
489 Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23
490 Float_t dxw1 = xhit1 - xwr13;
491 Float_t dxw2 = xhit2 - xwr23;
a3dfe79c 492 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
493 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
494 Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
fa412d9b 495 zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2;
496 zxe[1][0] = xwht1;
a3dfe79c 497 zxe[2][0] = eloss * egm1;
fa412d9b 498 zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2;
499 zxe[1][1] = xwht2;
a3dfe79c 500 zxe[2][1] = eloss * egm2;
fa412d9b 501 zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1;
502 zxe[1][2] = xwht3;
a3dfe79c 503 zxe[2][2] = eloss * egm3;
fa412d9b 504 }
505 else { // incline 2-wire hit
506 nIter = 2;
a3dfe79c 507 Float_t xwht1 = (iwht1 + 0.5) * kCelWr;
508 Float_t xwht2 = (iwht2 + 0.5) * kCelWr;
fa412d9b 509 Float_t xwr12 = (xwht1 + xwht2) / 2;
510 Float_t dxw1 = xhit1 - xwr12;
511 Float_t dxw2 = xhit2 - xwr12;
512 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
513 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
514 zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2;
515 zxe[1][0] = xwht1;
a3dfe79c 516 zxe[2][0] = eloss * egm1;
fa412d9b 517 zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2;
518 zxe[1][1] = xwht2;
a3dfe79c 519 zxe[2][1] = eloss * egm2;
fa412d9b 520 }
bea63bea 521
fa412d9b 522 // Finite size of ionization region
523
fa7cce36 524 Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ();
525 Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi();
a3dfe79c 526 Int_t nz3 = (kNgamz+1)/2;
527 Int_t nx3 = (kNgamx+1)/2;
528 cpvDigits->Expand(nIter*kNgamx*kNgamz);
fa412d9b 529 TClonesArray &ldigits = *(TClonesArray *)cpvDigits;
530
531 for (Int_t iter=0; iter<nIter; iter++) {
532
533 Float_t zhit = zxe[0][iter];
534 Float_t xhit = zxe[1][iter];
535 Float_t qhit = zxe[2][iter];
fa7cce36 536 Float_t zcell = zhit / GetGeometry()->GetPadSizeZ();
537 Float_t xcell = xhit / GetGeometry()->GetPadSizePhi();
fa412d9b 538 if ( zcell<=0 || xcell<=0 ||
539 zcell>=nCellZ || xcell>=nCellX) return;
540 Int_t izcell = (Int_t) zcell;
541 Int_t ixcell = (Int_t) xcell;
542 Float_t zc = zcell - izcell - 0.5;
543 Float_t xc = xcell - ixcell - 0.5;
a3dfe79c 544 for (Int_t iz=1; iz<=kNgamz; iz++) {
fa412d9b 545 Int_t kzg = izcell + iz - nz3;
546 if (kzg<=0 || kzg>nCellZ) continue;
547 Float_t zg = (Float_t)(iz-nz3) - zc;
a3dfe79c 548 for (Int_t ix=1; ix<=kNgamx; ix++) {
fa412d9b 549 Int_t kxg = ixcell + ix - nx3;
550 if (kxg<=0 || kxg>nCellX) continue;
551 Float_t xg = (Float_t)(ix-nx3) - xc;
552
553 // Now calculate pad response
554 Float_t qpad = CPVPadResponseFunction(qhit,zg,xg);
a3dfe79c 555 qpad += kNoise*rnor2;
fa412d9b 556 if (qpad<0) continue;
557
558 // Fill the array with pad response ID and amplitude
3d402178 559 new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad);
fa412d9b 560 }
fa412d9b 561 }
fa412d9b 562 }
563}
564
565//____________________________________________________________________________
566Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) {
567 // ------------------------------------------------------------------------
568 // Calculate the amplitude in one CPV pad using the
569 // cumulative pad response function
570 // Author: Yuri Kharlov (after Serguei Sadovski)
571 // 3 October 2000
572 // ------------------------------------------------------------------------
573
fa7cce36 574 Double_t dz = GetGeometry()->GetPadSizeZ() / 2;
575 Double_t dx = GetGeometry()->GetPadSizePhi() / 2;
576 Double_t z = zhit * GetGeometry()->GetPadSizeZ();
577 Double_t x = xhit * GetGeometry()->GetPadSizePhi();
fa412d9b 578 Double_t amplitude = qhit *
579 (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) -
580 CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx));
581 return (Float_t)amplitude;
7587f5a5 582}
583
fa412d9b 584//____________________________________________________________________________
585Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) {
586 // ------------------------------------------------------------------------
587 // Cumulative pad response function
588 // It includes several terms from the CF decomposition in electrostatics
589 // Note: this cumulative function is wrong since omits some terms
590 // but the cell amplitude obtained with it is correct because
591 // these omitting terms cancel
592 // Author: Yuri Kharlov (after Serguei Sadovski)
593 // 3 October 2000
594 // ------------------------------------------------------------------------
595
a3dfe79c 596 const Double_t kA=1.0;
597 const Double_t kB=0.7;
fa412d9b 598
599 Double_t r2 = x*x + y*y;
600 Double_t xy = x*y;
601 Double_t cumulPRF = 0;
602 for (Int_t i=0; i<=4; i++) {
a3dfe79c 603 Double_t b1 = (2*i + 1) * kB;
fa412d9b 604 cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) );
605 }
a3dfe79c 606 cumulPRF *= kA/(2*TMath::Pi());
fa412d9b 607 return cumulPRF;
608}
7eb9d12d 609