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914d1bb7 | 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 | //_________________________________________________________________________ | |
17 | // AliAODCaloCluster extension for PHOS to recalculate cluster | |
18 | // parameters in case of recalibration. | |
19 | //*-- | |
20 | //*-- Author: Dmitri Peressounko (RRC KI) | |
21 | ||
22 | ||
23 | // --- ROOT system --- | |
24 | #include "TVector3.h" | |
25 | #include "TMath.h" | |
26 | ||
27 | // --- Standard library --- | |
28 | ||
29 | // --- AliRoot header files --- | |
30 | #include "AliLog.h" | |
31 | #include "AliPHOSGeometry.h" | |
32 | #include "AliPHOSPIDv1.h" | |
33 | #include "AliPHOSAodCluster.h" | |
34 | #include "AliPHOSCalibData.h" | |
35 | #include "AliAODCaloCells.h" | |
36 | ||
37 | ClassImp(AliPHOSAodCluster) | |
38 | ||
39 | //____________________________________________________________________________ | |
40 | AliPHOSAodCluster::AliPHOSAodCluster() : | |
41 | AliAODCaloCluster(),fRecalibrated(0) | |
42 | { | |
43 | // ctor | |
44 | } | |
45 | //____________________________________________________________________________ | |
46 | AliPHOSAodCluster::AliPHOSAodCluster(const AliAODCaloCluster & clu) : | |
47 | AliAODCaloCluster(clu),fRecalibrated(0) | |
48 | { | |
49 | // cpy ctor | |
50 | } | |
51 | ||
52 | //____________________________________________________________________________ | |
53 | AliPHOSAodCluster::~AliPHOSAodCluster() | |
54 | { | |
55 | // dtor | |
56 | } | |
57 | //____________________________________________________________________________ | |
58 | void AliPHOSAodCluster::Recalibrate(AliPHOSCalibData * calibData,AliAODCaloCells *phsCells){ | |
59 | //If not done yet, apply recalibration coefficients to energies list | |
60 | //NOTE that after recalibration fCellsAmpFraction contains not FRACTION but FULL energy | |
61 | ||
62 | if(fRecalibrated) | |
63 | return ; | |
64 | ||
65 | if(!calibData) | |
66 | return ; | |
67 | ||
68 | AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ; | |
69 | if(!phosgeom) | |
70 | AliFatal("AliPHOSGeometry was not contructed\n") ; | |
71 | ||
72 | Double32_t * cellsAmpFraction = GetCellsAmplitudeFraction(); | |
73 | ||
74 | for(Int_t i=0; i < GetNCells(); i++){ | |
75 | Int_t relId[4]; | |
76 | phosgeom->AbsToRelNumbering(GetCellAbsId(i),relId) ; | |
77 | Int_t module = relId[0]; | |
78 | Int_t column = relId[3]; | |
79 | Int_t row = relId[2]; | |
80 | Double_t energy = phsCells->GetCellAmplitude(GetCellAbsId(i)) ; | |
81 | cellsAmpFraction[i]*=energy*calibData->GetADCchannelEmc(module,column,row); | |
82 | } | |
83 | ||
84 | SetCellsAmplitudeFraction(cellsAmpFraction); | |
85 | fRecalibrated=kTRUE; | |
86 | } | |
87 | //____________________________________________________________________________ | |
88 | void AliPHOSAodCluster::EvalAll(Float_t logWeight, TVector3 &vtx){ | |
89 | //If recalibrated - recalculate all cluster parameters | |
90 | if(!fRecalibrated) | |
91 | return ; | |
92 | ||
93 | EvalEnergy() ; //Energy should be evaluated first | |
94 | EvalCoord(logWeight, vtx) ; | |
95 | ||
96 | } | |
97 | //____________________________________________________________________________ | |
98 | void AliPHOSAodCluster::EvalEnergy(){ | |
99 | if(!fRecalibrated) // no need to recalibrate | |
100 | return ; | |
101 | ||
102 | Float_t energy=0. ; | |
103 | for(Int_t iDigit=0; iDigit < GetNCells(); iDigit++) { | |
104 | energy+=GetCellAmplitudeFraction(iDigit) ; | |
105 | } | |
106 | ||
107 | SetE(energy); | |
108 | //Correct for nonlinearity later | |
109 | ||
110 | } | |
111 | //____________________________________________________________________________ | |
112 | void AliPHOSAodCluster::EnergyCorrection(AliPHOSPIDv1 * pid){ | |
113 | //apply nonlinearity correction same as in AliPHOSPIDv1. | |
114 | SetE(pid->GetCalibratedEnergy(E())) ; | |
115 | } | |
116 | //____________________________________________________________________________ | |
117 | void AliPHOSAodCluster::EvalPID(AliPHOSPIDv1 * /*pid*/){ | |
118 | //re-evaluate identification parameters | |
119 | // pid->CalculatePID(E(),GetDispersion(),GetEmcCpvDistance(),GetTOF(),GetPID()) ; | |
120 | // pid->CalculatePID(E(),GetDispersion(),GetM20(),GetM02(),GetEmcCpvDistance(),GetTOF(),GetPID()) ; | |
121 | } | |
122 | //____________________________________________________________________________ | |
123 | void AliPHOSAodCluster::EvalCoord(Float_t logWeight, TVector3 &vtx) | |
124 | { | |
125 | // Calculates new center of gravity in the local PHOS-module coordinates | |
126 | // and tranfers into global ALICE coordinates | |
127 | // Calculates Dispersion and main axis | |
128 | if(!fRecalibrated) // no need to recalibrate | |
129 | return ; | |
130 | ||
131 | Float_t wtot = 0. ; | |
132 | Int_t relid[4] ; | |
133 | Int_t phosMod=0 ; | |
134 | Float_t xMean = 0. ; | |
135 | Float_t zMean = 0. ; | |
136 | ||
137 | AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ; | |
138 | if(!phosgeom) | |
139 | AliFatal("AliPHOSGeometry was not contructed\n") ; | |
140 | ||
141 | for(Int_t iDigit=0; iDigit < GetNCells(); iDigit++) { | |
142 | Float_t xi ; | |
143 | Float_t zi ; | |
144 | phosgeom->AbsToRelNumbering(GetCellAbsId(iDigit), relid) ; | |
145 | phosgeom->RelPosInModule(relid, xi, zi); | |
146 | phosMod=relid[0] ; | |
147 | Double_t ei=GetCellAmplitudeFraction(iDigit) ; | |
148 | if (E() > 0 && ei > 0) { | |
149 | Float_t w = TMath::Max( 0., logWeight + TMath::Log(ei/E()) ) ; | |
150 | xMean+= xi * w ; | |
151 | zMean+= zi * w ; | |
152 | wtot += w ; | |
153 | } | |
154 | else | |
155 | AliError(Form("Wrong energy %f and/or amplitude %f\n", ei, E())); | |
156 | } | |
157 | if (wtot>0) { | |
158 | xMean /= wtot ; | |
159 | zMean /= wtot ; | |
160 | } | |
161 | else | |
162 | AliError(Form("Wrong weight %f\n", wtot)); | |
163 | ||
164 | ||
165 | // Calculates the dispersion and second momenta | |
166 | Double_t d=0. ; | |
167 | Double_t dxx = 0.; | |
168 | Double_t dzz = 0.; | |
169 | Double_t dxz = 0.; | |
170 | for(Int_t iDigit=0; iDigit < GetNCells(); iDigit++) { | |
171 | Float_t xi ; | |
172 | Float_t zi ; | |
173 | phosgeom->AbsToRelNumbering(GetCellAbsId(iDigit), relid) ; | |
174 | phosgeom->RelPosInModule(relid, xi, zi); | |
175 | Double_t ei=GetCellAmplitudeFraction(iDigit) ; | |
176 | if (E() > 0 && ei > 0) { | |
177 | Float_t w = TMath::Max( 0., logWeight + TMath::Log(ei/E()) ) ; | |
178 | d += w*((xi-xMean)*(xi-xMean) + (zi-zMean)*(zi-zMean) ) ; | |
179 | dxx += w * xi * xi ; | |
180 | dzz += w * zi * zi ; | |
181 | dxz += w * xi * zi ; | |
182 | } | |
183 | else | |
184 | AliError(Form("Wrong energy %f and/or amplitude %f\n", ei, E())); | |
185 | } | |
186 | ||
187 | if (wtot>0) { | |
188 | d /= wtot ; | |
189 | dxx /= wtot ; | |
190 | dzz /= wtot ; | |
191 | dxz /= wtot ; | |
192 | dxx -= xMean * xMean ; | |
193 | dzz -= zMean * zMean ; | |
194 | dxz -= xMean * zMean ; | |
195 | SetM02(0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz )) ; | |
196 | SetM20(0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz )); | |
197 | } | |
198 | else{ | |
199 | AliError(Form("Wrong weight %f\n", wtot)); | |
200 | d=0. ; | |
201 | SetM20(0.) ; | |
202 | SetM02(0.) ; | |
203 | } | |
204 | ||
205 | if (d>=0) | |
206 | SetDispersion(TMath::Sqrt(d)) ; | |
207 | else | |
208 | SetDispersion(0) ; | |
209 | ||
210 | ||
211 | // Correction for the depth of the shower starting point (TDR p 127) | |
212 | Float_t para = 0.925 ; | |
213 | Float_t parb = 6.52 ; | |
214 | ||
215 | TVector3 vInc ; | |
216 | phosgeom->GetIncidentVector(vtx,phosMod,xMean,zMean,vInc) ; | |
217 | ||
218 | Float_t depthx = 0.; | |
219 | Float_t depthz = 0.; | |
220 | if (E()>0&&vInc.Y()!=0.) { | |
221 | depthx = ( para * TMath::Log(E()) + parb ) * vInc.X()/TMath::Abs(vInc.Y()) ; | |
222 | depthz = ( para * TMath::Log(E()) + parb ) * vInc.Z()/TMath::Abs(vInc.Y()) ; | |
223 | } | |
224 | else | |
225 | AliError(Form("Wrong amplitude %f\n", E())); | |
226 | ||
227 | xMean-= depthx ; | |
228 | zMean-= depthz ; | |
229 | ||
230 | //Go to the global system | |
231 | TVector3 gps ; | |
232 | phosgeom->Local2Global(phosMod, xMean, zMean, gps) ; | |
c8fe2783 | 233 | SetPositionAt(gps[0],0) ; |
234 | SetPositionAt(gps[1],1) ; | |
235 | SetPositionAt(gps[2],2) ; | |
914d1bb7 | 236 | } |