Moving to the new VMC naming convention
[u/mrichter/AliRoot.git] / PHOS / AliPHOSv3.cxx
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5f20d3fb 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
18//_________________________________________________________________________
19// Implementation version v0 of PHOS Manager class
20// Layout EMC + PPSD has name GPS2
21// The main goal of this version of AliPHOS is to calculte the
22// induced charged in the PIN diode, taking into account light
23// tracking in the PbWO4 crystal, induced signal in the
24// PIN due to MIPS particle and electronic noise.
25// This is done in the StepManager
26//
50abc6f8 27//*-- Author: Odd Harald Odland & Gines Martinez (SUBATECH)
5f20d3fb 28
29
30// --- ROOT system ---
31#include "TRandom.h"
32
33// --- Standard library ---
34
5f20d3fb 35#include <string.h>
36#include <stdlib.h>
37#include <strstream.h>
38
39// --- AliRoot header files ---
40
41#include "AliPHOSv3.h"
42#include "AliPHOSHit.h"
97cee223 43#include "AliPHOSCPVDigit.h"
5f20d3fb 44#include "AliRun.h"
45#include "AliConst.h"
88cb7938 46#include "AliMC.h"
97cee223 47#include "AliPHOSGeometry.h"
5f20d3fb 48
49ClassImp(AliPHOSv3)
50
51//____________________________________________________________________________
735e58f1 52 AliPHOSv3::AliPHOSv3(void) : AliPHOSv1()
53{
54 // default ctor: initialize daa members
55
56 fLightYieldMean = 0. ;
57 fIntrinsicPINEfficiency = 0. ;
58 fLightYieldAttenuation = 0. ;
59 fRecalibrationFactor = 0. ;
3dab1cef 60 fElectronsPerGeV = 0. ;
61 fAPDGain = 0. ;
735e58f1 62
63}
64
65//____________________________________________________________________________
e04976bd 66 AliPHOSv3::AliPHOSv3(const char *name, const char *title):
67AliPHOSv1(name,title)
5f20d3fb 68{
69 // ctor
70
3dab1cef 71 // The light yield is a poissonian distribution of the number of
72 // photons created in the PbWo4 crystal, calculated using following formula
73 // NumberOfPhotons = EnergyLost * LightYieldMean* APDEfficiency *
74 // exp (-LightYieldAttenuation * DistanceToPINdiodeFromTheHit);
75 // LightYieldMean is parameter calculated to be over 47000 photons per GeV
76 // APDEfficiency is 0.02655
5f20d3fb 77 // k_0 is 0.0045 from Valery Antonenko
3dab1cef 78 // The number of electrons created in the APD is
79 // NumberOfElectrons = APDGain * LightYield
80 // The APD Gain is 300
81
82 fLightYieldMean = 47000;
83 fIntrinsicPINEfficiency = 0.02655 ; //APD= 0.1875/0.1271 * 0.018 (PIN)
84 fLightYieldAttenuation = 0.0045 ;
85 fRecalibrationFactor = 13.418/ fLightYieldMean ;
86 fElectronsPerGeV = 2.77e+8 ;
87 fAPDGain= 300. ;
5f20d3fb 88}
89
97cee223 90// //____________________________________________________________________________
91// AliPHOSv3::AliPHOSv3(AliPHOSReconstructioner * Reconstructioner, const char *name, const char *title):
92// AliPHOSv1(Reconstructioner,name,title)
93// {
94// // ctor
95
96// // Number of electrons created in the PIN due to light collected in the PbWo4 crystal is calculated using
97// // following formula
98// // NumberOfElectrons = EnergyLost * LightYield * PINEfficiency *
99// // exp (-LightYieldAttenuation * DistanceToPINdiodeFromTheHit) *
100// // RecalibrationFactor ;
101// // LightYield is obtained as a Poissonian distribution with a mean at 700000 photons per GeV fromValery Antonenko
50abc6f8 102// // PINEfficiency is 0.1875
97cee223 103// // k_0 is 0.0045 from Valery Antonenko
104
105// fLightYieldMean = 700000.;
106// fIntrinsicPINEfficiency = 0.1875 ;
107// fLightYieldAttenuation = 0.0045 ;
108// fRecalibrationFactor = 6.2 / fLightYieldMean ;
50abc6f8 109// fRecalibrationFactor = 5.67 /fLightYieldMean ;//25.04.2001 OHO
97cee223 110// fElectronsPerGeV = 2.77e+8 ;
111// }
5f20d3fb 112//____________________________________________________________________________
037cc66d 113
5f20d3fb 114void AliPHOSv3::StepManager(void)
115{
116 // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell
037cc66d 117
118// if (gMC->IsTrackEntering())
21cd0c07 119// Info("StepManager", "Track enters the volume %d", gMC->CurrentVolName()) ;
037cc66d 120// if (gMC->IsTrackExiting())
21cd0c07 121// Info("StepManager", "Track leaves the volume %d", gMC->CurrentVolName()) ;
5f20d3fb 122
5c617c31 123 Int_t relid[4] ; // (box, layer, row, column) indices
124 Int_t absid ; // absolute cell ID number
037cc66d 125 Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited
3dab1cef 126
127 TLorentzVector pos ; // Lorentz vector of the track current position
037cc66d 128 Int_t copy ;
3dab1cef 129 Float_t fLightYield ; // Light Yield per GeV
130
642f15cf 131 Int_t tracknumber = gAlice->GetCurrentTrackNumber() ;
132 Int_t primary = gAlice->GetPrimary( gAlice->GetCurrentTrackNumber() );
fa7cce36 133 TString name = GetGeometry()->GetName() ;
50abc6f8 134 Float_t lostenergy ;
135 Float_t global[3] ;
136 Float_t local[3] ;
037cc66d 137
138
139 if ( name == "GPS2" || name == "MIXT" ) { // ======> CPV is a GPS' PPSD
5f20d3fb 140
dc999bc0 141 if( gMC->CurrentVolID(copy) == gMC->VolId("PPCE") ) // We are inside a gas cell
5f20d3fb 142 {
143 gMC->TrackPosition(pos) ;
144 xyze[0] = pos[0] ;
145 xyze[1] = pos[1] ;
146 xyze[2] = pos[2] ;
037cc66d 147 xyze[3] = gMC->Edep() ;
5f20d3fb 148
b37750a6 149 if ( xyze[3] != 0) { // there is deposited energy
5f20d3fb 150 gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number
037cc66d 151 if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ){
fa7cce36 152 relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules();
037cc66d 153 }
5f20d3fb 154 gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number
fa7cce36 155 // 1-> GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() upper
156 // > GetGeometry()->GetNumberOfModulesPhi() * GetGeometry()->GetNumberOfModulesZ() lower
5f20d3fb 157 gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell
158 gMC->CurrentVolID(relid[3]) ; // get the column number
159
160 // get the absolute Id number
161
fa7cce36 162 GetGeometry()->RelToAbsNumbering(relid, absid) ;
037cc66d 163
164 // add current hit to the hit list
b37750a6 165 AddHit(fIshunt, primary, tracknumber, absid, xyze);
5f20d3fb 166
5f20d3fb 167
168 } // there is deposited energy
037cc66d 169 } // We are inside the gas of the CPV
170 } // GPS2 configuration
171
172 if ( name == "IHEP" || name == "MIXT" ) { // ======> CPV is a IHEP's one
173
174 // Yuri Kharlov, 28 September 2000
175
97cee223 176 if( gMC->CurrentVolID(copy) == gMC->VolId("PCPQ") &&
b37750a6 177 gMC->IsTrackEntering() &&
037cc66d 178 gMC->TrackCharge() != 0) {
b37750a6 179
180 gMC -> TrackPosition(pos);
181 Float_t xyzm[3], xyzd[3] ;
182 Int_t i;
183 for (i=0; i<3; i++) xyzm[i] = pos[i];
184 gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system
185
186 Float_t xyd[3]={0,0,0} ; //local posiiton of the entering
187 xyd[0] = xyzd[0];
188 xyd[1] =-xyzd[1];
189 xyd[2] =-xyzd[2];
190
191
192 // Current momentum of the hit's track in the local ref. system
193 TLorentzVector pmom ; //momentum of the particle initiated hit
194 gMC -> TrackMomentum(pmom);
195 Float_t pm[3], pd[3];
196 for (i=0; i<3; i++) pm[i] = pmom[i];
197 gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system
198 pmom[0] = pd[0];
199 pmom[1] =-pd[1];
200 pmom[2] =-pd[2];
037cc66d 201
202 // Digitize the current CPV hit:
203
204 // 1. find pad response and
205
206 Int_t moduleNumber;
207 gMC->CurrentVolOffID(3,moduleNumber);
208 moduleNumber--;
209
210
211 TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit
212 CPVDigitize(pmom,xyd,moduleNumber,cpvDigits);
213
214 Float_t xmean = 0;
215 Float_t zmean = 0;
216 Float_t qsum = 0;
217 Int_t idigit,ndigits;
218
219 // 2. go through the current digit list and sum digits in pads
220
221 ndigits = cpvDigits->GetEntriesFast();
222 for (idigit=0; idigit<ndigits-1; idigit++) {
29b077b5 223 AliPHOSCPVDigit *cpvDigit1 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit));
037cc66d 224 Float_t x1 = cpvDigit1->GetXpad() ;
225 Float_t z1 = cpvDigit1->GetYpad() ;
226 for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) {
29b077b5 227 AliPHOSCPVDigit *cpvDigit2 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(jdigit));
037cc66d 228 Float_t x2 = cpvDigit2->GetXpad() ;
229 Float_t z2 = cpvDigit2->GetYpad() ;
230 if (x1==x2 && z1==z2) {
231 Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ;
232 cpvDigit2->SetQpad(qsum) ;
233 cpvDigits->RemoveAt(idigit) ;
234 }
235 }
236 }
237 cpvDigits->Compress() ;
238
239 // 3. add digits to temporary hit list fTmpHits
240
241 ndigits = cpvDigits->GetEntriesFast();
242 for (idigit=0; idigit<ndigits; idigit++) {
29b077b5 243 AliPHOSCPVDigit *cpvDigit = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit));
037cc66d 244 relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number
245 relid[1] =-1 ; // means CPV
246 relid[2] = cpvDigit->GetXpad() ; // column number of a pad
247 relid[3] = cpvDigit->GetYpad() ; // row number of a pad
248
249 // get the absolute Id number
fa7cce36 250 GetGeometry()->RelToAbsNumbering(relid, absid) ;
037cc66d 251
252 // add current digit to the temporary hit list
253 xyze[0] = 0. ;
254 xyze[1] = 0. ;
255 xyze[2] = 0. ;
256 xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad
257 primary = -1; // No need in primary for CPV
b37750a6 258 AddHit(fIshunt, primary, tracknumber, absid, xyze);
037cc66d 259
260 if (cpvDigit->GetQpad() > 0.02) {
261 xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5);
262 zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5);
263 qsum += cpvDigit->GetQpad();
264 }
265 }
266 delete cpvDigits;
267 }
268 } // end of IHEP configuration
5f20d3fb 269
5f20d3fb 270
50abc6f8 271if(gMC->CurrentVolID(copy)==gMC->VolId("PXTL")){// We are inside a PBWO4 crystal
037cc66d 272 gMC->TrackPosition(pos) ;
273 xyze[0] = pos[0] ;
274 xyze[1] = pos[1] ;
275 xyze[2] = pos[2] ;
50abc6f8 276 global[0] = pos[0] ;
277 global[1] = pos[1] ;
278 global[2] = pos[2] ;
279 lostenergy = gMC->Edep();
037cc66d 280 xyze[3] = gMC->Edep() ;
5f20d3fb 281
037cc66d 282
50abc6f8 283 if ( (xyze[3] != 0) ){//Track is inside the crystal and deposits some energy
5f20d3fb 284
037cc66d 285 gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ;
5f20d3fb 286
037cc66d 287 if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(10),"PHO1") == 0 )
fa7cce36 288 relid[0] += GetGeometry()->GetNModules() - GetGeometry()->GetNPPSDModules();
037cc66d 289
290 relid[1] = 0 ; // means PBW04
50abc6f8 291 gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module
292 gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module
037cc66d 293
5f20d3fb 294 // get the absolute Id number
50abc6f8 295
3dab1cef 296 GetGeometry()->RelToAbsNumbering(relid, absid) ;
037cc66d 297
3dab1cef 298 gMC->Gmtod(global, local, 1) ;
50abc6f8 299
3dab1cef 300 //Calculates the light yield, the number of photns produced in the
301 //crystal
302 fLightYield = gRandom->Poisson(
303 fLightYieldMean * lostenergy *
304 fIntrinsicPINEfficiency *
305 exp(-fLightYieldAttenuation *
306 (local[1]+GetGeometry()->GetCrystalSize(1)/2.0 ))
307 ) ;
308 //Calculates de energy deposited in the crystal
309 xyze[3] = (fRecalibrationFactor/100.) * fAPDGain * fLightYield ;
310
68140e39 311
21cd0c07 312 // Info("StepManager", "xyze[3]: %f", xyze[3]) ;
313 // Info("StepManager", "lostenergy: %f", lostenergy) ;
50abc6f8 314
50abc6f8 315
3dab1cef 316
50abc6f8 317
037cc66d 318 // add current hit to the hit list
3dab1cef 319
50abc6f8 320
3dab1cef 321 if (xyze[3] != 0.) AddHit(fIshunt, primary,tracknumber, absid, xyze);
322
5f20d3fb 323
037cc66d 324 } // there is deposited energy
325 } // we are inside a PHOS Xtal
326
3dab1cef 327// if(gMC->CurrentVolID(copy) == gMC->VolId("PPIN"))//We are inside the PIN diode
328// {
21cd0c07 329// Info("StepManager", "Inside PIN";
3dab1cef 330// gMC->TrackPosition(pos) ;
331// global[0] = pos[0] ;
332// global[1] = pos[1] ;
333// global[2] = pos[2] ;
334// xyze[0] = pos[0] ;
335// xyze[1] = pos[1] ;
336// xyze[2] = pos[2] ;
337// lostenergy = gMC->Edep() ;
338// xyze[3] = gMC->Edep() ;
037cc66d 339
3dab1cef 340// if ( xyze[3] != 0 ) {
341// gMC->CurrentVolOffID(11, relid[0]) ; // get the PHOS module number ;
342// relid[1] = 0 ; // means PW04 and PIN
343// gMC->CurrentVolOffID(5, relid[2]) ; // get the row number inside the module
344// gMC->CurrentVolOffID(4, relid[3]) ; // get the cell number inside the module
037cc66d 345
3dab1cef 346// // get the absolute Id number
037cc66d 347
3dab1cef 348// Int_t absid ;
349// GetGeometry()->RelToAbsNumbering(relid,absid) ;
350// gMC->Gmtod(global, local, 1) ;
50abc6f8 351
3dab1cef 352// // calculating number of electrons in the PIN diode asociated to this hit
50abc6f8 353
3dab1cef 354// //nElectrons = lostenergy * fElectronsPerGeV ;
355// // xyze[3] = nElectrons * fRecalibrationFactor ;
356// apdgain = gRandom->Poisson(300.) ;
357// // apdgain = 300.;
358// //if(local[1]<-0.0045) xyze[3] = apdgain * nElectrons * fRecalibrationFactor/10000.;
68140e39 359
3dab1cef 360// if(local[1]<-0.0045) xyze[3] = apdgain * lostenergy * fElectronsPerGeV* (fRecalibrationFactor/100.);
68140e39 361
3dab1cef 362// //if((local[1]>-0.0045)&&(gMC->TrackPid()==-11)) xyze[3] = apdgain * nElectrons * fRecalibrationFactor/10000.;
68140e39 363
3dab1cef 364// if((local[1]>-0.0045)&&(gMC->TrackPid()==-11)) xyze[3] = apdgain * lostenergy * fElectronsPerGeV * (fRecalibrationFactor/100.);
68140e39 365
3dab1cef 366// //if(local[1]>-0.0045) xyze[3] = nElectrons * fRecalibrationFactor/10000.;
68140e39 367
3dab1cef 368// if(local[1]>-0.0045) xyze[3] = lostenergy * fElectronsPerGeV * (fRecalibrationFactor/100.);
037cc66d 369
3dab1cef 370// // add current hit to the hit list
50abc6f8 371
3dab1cef 372// AddHit(fIshunt, primary, tracknumber, absid, xyze);
50abc6f8 373
3dab1cef 374// //printf("PIN volume is %d, %d, %d, %d \n",relid[0],relid[1],relid[2],relid[3]);
375// printf("Lost energy in the PIN is %f \n",lostenergy) ;
376// } // there is deposited energy
377// } // we are inside a PHOS XtalPHOS PIN diode
5f20d3fb 378}