Obsolete lines for reverse eng. removed
[u/mrichter/AliRoot.git] / PHOS / AliPHOSv3.cxx
CommitLineData
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//
27//*-- Author: Odd Harald Oddland & Gines Martinez (SUBATECH)
28
29
30// --- ROOT system ---
31#include "TRandom.h"
32
33// --- Standard library ---
34
35#include <stdio.h>
36#include <string.h>
37#include <stdlib.h>
38#include <strstream.h>
39
40// --- AliRoot header files ---
41
42#include "AliPHOSv3.h"
43#include "AliPHOSHit.h"
44#include "AliPHOSDigit.h"
45#include "AliRun.h"
46#include "AliConst.h"
94de3818 47#include "AliMC.h"
5f20d3fb 48
49ClassImp(AliPHOSv3)
50
51//____________________________________________________________________________
e04976bd 52 AliPHOSv3::AliPHOSv3(const char *name, const char *title):
53AliPHOSv1(name,title)
5f20d3fb 54{
55 // ctor
56
57 // Number of electrons created in the PIN due to light collected in the PbWo4 crystal is calculated using
58 // following formula
59 // NumberOfElectrons = EnergyLost * LightYield * PINEfficiency *
60 // exp (-LightYieldAttenuation * DistanceToPINdiodeFromTheHit) *
61 // RecalibrationFactor ;
62 // LightYield is obtained as a Poissonian distribution with a mean at 700000 photons per GeV fromValery Antonenko
63 // PINEfficiency is 0.1875 from Odd Harald Odland work
64 // k_0 is 0.0045 from Valery Antonenko
65
e04976bd 66
5f20d3fb 67 fLightYieldMean = 700000. ;
68 fIntrinsicPINEfficiency = 0.1875 ;
69 fLightYieldAttenuation = 0.0045 ;
70 fRecalibrationFactor = 6.2 / fLightYieldMean ;
71 fElectronsPerGeV = 2.77e+8 ;
72}
73
74//____________________________________________________________________________
75AliPHOSv3::AliPHOSv3(AliPHOSReconstructioner * Reconstructioner, const char *name, const char *title):
76 AliPHOSv1(Reconstructioner,name,title)
77{
78 // ctor
79
80 // Number of electrons created in the PIN due to light collected in the PbWo4 crystal is calculated using
81 // following formula
82 // NumberOfElectrons = EnergyLost * LightYield * PINEfficiency *
83 // exp (-LightYieldAttenuation * DistanceToPINdiodeFromTheHit) *
84 // RecalibrationFactor ;
85 // LightYield is obtained as a Poissonian distribution with a mean at 700000 photons per GeV fromValery Antonenko
86 // PINEfficiency is 0.1875 from Odd Harald Odland work
87 // k_0 is 0.0045 from Valery Antonenko
88
89 fLightYieldMean = 700000.;
90 fIntrinsicPINEfficiency = 0.1875 ;
91 fLightYieldAttenuation = 0.0045 ;
92 fRecalibrationFactor = 6.2 / fLightYieldMean ;
93 fElectronsPerGeV = 2.77e+8 ;
94}
5f20d3fb 95//____________________________________________________________________________
037cc66d 96
5f20d3fb 97void AliPHOSv3::StepManager(void)
98{
99 // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell
037cc66d 100
101// if (gMC->IsTrackEntering())
102// cout << "Track enters the volume " << gMC->CurrentVolName() << endl;
103// if (gMC->IsTrackExiting())
104// cout << "Track leaves the volume " << gMC->CurrentVolName() << endl;
5f20d3fb 105
5c617c31 106 Int_t relid[4] ; // (box, layer, row, column) indices
107 Int_t absid ; // absolute cell ID number
037cc66d 108 Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited
5c617c31 109 TLorentzVector pos ; // Lorentz vector of the track current position
110 TLorentzVector pmom ; //momentum of the particle initiated hit
111 Float_t xyd[2]={0,0} ; //local posiiton of the entering
037cc66d 112 Bool_t entered = kFALSE ;
113 Int_t copy ;
5f20d3fb 114
115 Int_t tracknumber = gAlice->CurrentTrack() ;
037cc66d 116 Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() );
117 TString name = fGeom->GetName() ;
118 Int_t trackpid = 0 ;
119
120 if( gMC->IsTrackEntering() ){ // create hit with position and momentum of new particle,
121 // but may be without energy deposition
122
123 // Current position of the hit in the local ref. system
124 gMC -> TrackPosition(pos);
125 Float_t xyzm[3], xyzd[3] ;
126 Int_t i;
127 for (i=0; i<3; i++) xyzm[i] = pos[i];
128 gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system
129 xyd[0] = xyzd[0];
130 xyd[1] =-xyzd[2];
131
132 // Current momentum of the hit's track in the local ref. system
133 gMC -> TrackMomentum(pmom);
134 Float_t pm[3], pd[3];
135 for (i=0; i<3; i++) pm[i] = pmom[i];
136 gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system
137 pmom[0] = pd[0];
138 pmom[1] =-pd[1];
139 pmom[2] =-pd[2];
140
141 trackpid = gMC->TrackPid();
142 entered = kTRUE ; // Mark to create hit even withou energy deposition
143
144 }
145
146
147 if ( name == "GPS2" || name == "MIXT" ) { // ======> CPV is a GPS' PPSD
5f20d3fb 148
5f20d3fb 149 if( gMC->CurrentVolID(copy) == gMC->VolId("GCEL") ) // We are inside a gas cell
150 {
151 gMC->TrackPosition(pos) ;
152 xyze[0] = pos[0] ;
153 xyze[1] = pos[1] ;
154 xyze[2] = pos[2] ;
037cc66d 155 xyze[3] = gMC->Edep() ;
5f20d3fb 156
037cc66d 157 if ( (xyze[3] != 0) || entered ) { // there is deposited energy or new particle entering PPSD
5f20d3fb 158 gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number
037cc66d 159 if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ){
160 relid[0] += fGeom->GetNModules() - fGeom->GetNPPSDModules();
161 }
5f20d3fb 162 gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number
037cc66d 163 // 1-> fGeom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() upper
164 // > fGeom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() lower
5f20d3fb 165 gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell
166 gMC->CurrentVolID(relid[3]) ; // get the column number
167
168 // get the absolute Id number
169
037cc66d 170 fGeom->RelToAbsNumbering(relid, absid) ;
171
172 // add current hit to the hit list
173 AddHit(fIshunt, primary, tracknumber, absid, xyze, trackpid, pmom, xyd);
5f20d3fb 174
5f20d3fb 175
176 } // there is deposited energy
037cc66d 177 } // We are inside the gas of the CPV
178 } // GPS2 configuration
179
180 if ( name == "IHEP" || name == "MIXT" ) { // ======> CPV is a IHEP's one
181
182 // Yuri Kharlov, 28 September 2000
183
184 if( gMC->CurrentVolID(copy) == gMC->VolId("CPVQ") &&
185 entered &&
186 gMC->TrackCharge() != 0) {
187
188 // Digitize the current CPV hit:
189
190 // 1. find pad response and
191
192 Int_t moduleNumber;
193 gMC->CurrentVolOffID(3,moduleNumber);
194 moduleNumber--;
195
196
197 TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit
198 CPVDigitize(pmom,xyd,moduleNumber,cpvDigits);
199
200 Float_t xmean = 0;
201 Float_t zmean = 0;
202 Float_t qsum = 0;
203 Int_t idigit,ndigits;
204
205 // 2. go through the current digit list and sum digits in pads
206
207 ndigits = cpvDigits->GetEntriesFast();
208 for (idigit=0; idigit<ndigits-1; idigit++) {
209 AliPHOSCPVDigit *cpvDigit1 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit);
210 Float_t x1 = cpvDigit1->GetXpad() ;
211 Float_t z1 = cpvDigit1->GetYpad() ;
212 for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) {
213 AliPHOSCPVDigit *cpvDigit2 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(jdigit);
214 Float_t x2 = cpvDigit2->GetXpad() ;
215 Float_t z2 = cpvDigit2->GetYpad() ;
216 if (x1==x2 && z1==z2) {
217 Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ;
218 cpvDigit2->SetQpad(qsum) ;
219 cpvDigits->RemoveAt(idigit) ;
220 }
221 }
222 }
223 cpvDigits->Compress() ;
224
225 // 3. add digits to temporary hit list fTmpHits
226
227 ndigits = cpvDigits->GetEntriesFast();
228 for (idigit=0; idigit<ndigits; idigit++) {
229 AliPHOSCPVDigit *cpvDigit = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit);
230 relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number
231 relid[1] =-1 ; // means CPV
232 relid[2] = cpvDigit->GetXpad() ; // column number of a pad
233 relid[3] = cpvDigit->GetYpad() ; // row number of a pad
234
235 // get the absolute Id number
236 fGeom->RelToAbsNumbering(relid, absid) ;
237
238 // add current digit to the temporary hit list
239 xyze[0] = 0. ;
240 xyze[1] = 0. ;
241 xyze[2] = 0. ;
242 xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad
243 primary = -1; // No need in primary for CPV
244 AddHit(fIshunt, primary, tracknumber, absid, xyze, trackpid, pmom, xyd);
245
246 if (cpvDigit->GetQpad() > 0.02) {
247 xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5);
248 zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5);
249 qsum += cpvDigit->GetQpad();
250 }
251 }
252 delete cpvDigits;
253 }
254 } // end of IHEP configuration
5f20d3fb 255
5f20d3fb 256
037cc66d 257 if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal
258 gMC->TrackPosition(pos) ;
259 xyze[0] = pos[0] ;
260 xyze[1] = pos[1] ;
261 xyze[2] = pos[2] ;
262 xyze[3] = gMC->Edep() ;
5f20d3fb 263
037cc66d 264
265 if ( (xyze[3] != 0) || entered ) { // Track is inside the crystal and deposits some energy or just entered
5f20d3fb 266
037cc66d 267 gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ;
5f20d3fb 268
037cc66d 269 if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(10),"PHO1") == 0 )
270 relid[0] += fGeom->GetNModules() - fGeom->GetNPPSDModules();
271
272 relid[1] = 0 ; // means PBW04
273 gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module
274 gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module
275
5f20d3fb 276 // get the absolute Id number
037cc66d 277 fGeom->RelToAbsNumbering(relid, absid) ;
278
279 // add current hit to the hit list
280 AddHit(fIshunt, primary,tracknumber, absid, xyze, trackpid,pmom, xyd);
5f20d3fb 281
5f20d3fb 282
037cc66d 283 } // there is deposited energy
284 } // we are inside a PHOS Xtal
285
286 if(gMC->CurrentVolID(copy) == gMC->VolId("PPIN") ) // We are inside de PIN diode
287 {
288 gMC->TrackPosition(pos) ;
289 xyze[0] = pos[0] ;
290 xyze[1] = pos[1] ;
291 xyze[2] = pos[2] ;
292 Float_t lostenergy = gMC->Edep() ;
293 xyze[3] = gMC->Edep() ;
294
295 if ( xyze[3] != 0 ) {
296 gMC->CurrentVolOffID(11, relid[0]) ; // get the PHOS module number ;
297 relid[1] = 0 ; // means PW04 and PIN
298 gMC->CurrentVolOffID(5, relid[2]) ; // get the row number inside the module
299 gMC->CurrentVolOffID(4, relid[3]) ; // get the cell number inside the module
300
301 // get the absolute Id number
302
303 Int_t absid ;
304 fGeom->RelToAbsNumbering(relid,absid) ;
305
306 // calculating number of electrons in the PIN diode asociated to this hit
307 Float_t nElectrons = lostenergy * fElectronsPerGeV ;
308 xyze[3] = nElectrons * fRecalibrationFactor ;
309
5f20d3fb 310 // add current hit to the hit list
037cc66d 311 AddHit(fIshunt, primary, tracknumber, absid, xyze, trackpid,pmom,xyd);
5f20d3fb 312 //printf("PIN volume is %d, %d, %d, %d \n",relid[0],relid[1],relid[2],relid[3]);
313 //printf("Lost energy in the PIN is %f \n",lostenergy) ;
037cc66d 314 } // there is deposited energy
5f20d3fb 315 } // we are inside a PHOS XtalPHOS PIN diode
316}