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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" | |
25312a8e | 33 | #include "AliPHOSReconstructor.h" |
914d1bb7 | 34 | #include "AliPHOSAodCluster.h" |
35 | #include "AliPHOSCalibData.h" | |
36 | #include "AliAODCaloCells.h" | |
37 | ||
38 | ClassImp(AliPHOSAodCluster) | |
39 | ||
40 | //____________________________________________________________________________ | |
41 | AliPHOSAodCluster::AliPHOSAodCluster() : | |
42 | AliAODCaloCluster(),fRecalibrated(0) | |
43 | { | |
44 | // ctor | |
45 | } | |
46 | //____________________________________________________________________________ | |
47 | AliPHOSAodCluster::AliPHOSAodCluster(const AliAODCaloCluster & clu) : | |
48 | AliAODCaloCluster(clu),fRecalibrated(0) | |
49 | { | |
50 | // cpy ctor | |
51 | } | |
52 | ||
53 | //____________________________________________________________________________ | |
54 | AliPHOSAodCluster::~AliPHOSAodCluster() | |
55 | { | |
56 | // dtor | |
57 | } | |
58 | //____________________________________________________________________________ | |
59 | void AliPHOSAodCluster::Recalibrate(AliPHOSCalibData * calibData,AliAODCaloCells *phsCells){ | |
60 | //If not done yet, apply recalibration coefficients to energies list | |
61 | //NOTE that after recalibration fCellsAmpFraction contains not FRACTION but FULL energy | |
62 | ||
63 | if(fRecalibrated) | |
64 | return ; | |
65 | ||
66 | if(!calibData) | |
67 | return ; | |
68 | ||
69 | AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ; | |
70 | if(!phosgeom) | |
71 | AliFatal("AliPHOSGeometry was not contructed\n") ; | |
72 | ||
73 | Double32_t * cellsAmpFraction = GetCellsAmplitudeFraction(); | |
74 | ||
75 | for(Int_t i=0; i < GetNCells(); i++){ | |
76 | Int_t relId[4]; | |
77 | phosgeom->AbsToRelNumbering(GetCellAbsId(i),relId) ; | |
78 | Int_t module = relId[0]; | |
79 | Int_t column = relId[3]; | |
80 | Int_t row = relId[2]; | |
81 | Double_t energy = phsCells->GetCellAmplitude(GetCellAbsId(i)) ; | |
82 | cellsAmpFraction[i]*=energy*calibData->GetADCchannelEmc(module,column,row); | |
83 | } | |
84 | ||
85 | SetCellsAmplitudeFraction(cellsAmpFraction); | |
86 | fRecalibrated=kTRUE; | |
87 | } | |
88 | //____________________________________________________________________________ | |
89 | void AliPHOSAodCluster::EvalAll(Float_t logWeight, TVector3 &vtx){ | |
90 | //If recalibrated - recalculate all cluster parameters | |
91 | if(!fRecalibrated) | |
92 | return ; | |
93 | ||
94 | EvalEnergy() ; //Energy should be evaluated first | |
95 | EvalCoord(logWeight, vtx) ; | |
96 | ||
97 | } | |
98 | //____________________________________________________________________________ | |
99 | void AliPHOSAodCluster::EvalEnergy(){ | |
100 | if(!fRecalibrated) // no need to recalibrate | |
101 | return ; | |
102 | ||
103 | Float_t energy=0. ; | |
104 | for(Int_t iDigit=0; iDigit < GetNCells(); iDigit++) { | |
105 | energy+=GetCellAmplitudeFraction(iDigit) ; | |
106 | } | |
107 | ||
108 | SetE(energy); | |
109 | //Correct for nonlinearity later | |
110 | ||
111 | } | |
112 | //____________________________________________________________________________ | |
25312a8e | 113 | void AliPHOSAodCluster::EnergyCorrection(){ |
914d1bb7 | 114 | //apply nonlinearity correction same as in AliPHOSPIDv1. |
25312a8e | 115 | SetE(AliPHOSReconstructor::CorrectNonlinearity(E())) ; |
914d1bb7 | 116 | } |
117 | //____________________________________________________________________________ | |
118 | void AliPHOSAodCluster::EvalPID(AliPHOSPIDv1 * /*pid*/){ | |
119 | //re-evaluate identification parameters | |
120 | // pid->CalculatePID(E(),GetDispersion(),GetEmcCpvDistance(),GetTOF(),GetPID()) ; | |
121 | // pid->CalculatePID(E(),GetDispersion(),GetM20(),GetM02(),GetEmcCpvDistance(),GetTOF(),GetPID()) ; | |
122 | } | |
123 | //____________________________________________________________________________ | |
124 | void AliPHOSAodCluster::EvalCoord(Float_t logWeight, TVector3 &vtx) | |
125 | { | |
126 | // Calculates new center of gravity in the local PHOS-module coordinates | |
127 | // and tranfers into global ALICE coordinates | |
128 | // Calculates Dispersion and main axis | |
129 | if(!fRecalibrated) // no need to recalibrate | |
130 | return ; | |
131 | ||
132 | Float_t wtot = 0. ; | |
133 | Int_t relid[4] ; | |
134 | Int_t phosMod=0 ; | |
135 | Float_t xMean = 0. ; | |
136 | Float_t zMean = 0. ; | |
137 | ||
138 | AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ; | |
139 | if(!phosgeom) | |
140 | AliFatal("AliPHOSGeometry was not contructed\n") ; | |
141 | ||
142 | for(Int_t iDigit=0; iDigit < GetNCells(); iDigit++) { | |
143 | Float_t xi ; | |
144 | Float_t zi ; | |
145 | phosgeom->AbsToRelNumbering(GetCellAbsId(iDigit), relid) ; | |
146 | phosgeom->RelPosInModule(relid, xi, zi); | |
147 | phosMod=relid[0] ; | |
148 | Double_t ei=GetCellAmplitudeFraction(iDigit) ; | |
149 | if (E() > 0 && ei > 0) { | |
150 | Float_t w = TMath::Max( 0., logWeight + TMath::Log(ei/E()) ) ; | |
151 | xMean+= xi * w ; | |
152 | zMean+= zi * w ; | |
153 | wtot += w ; | |
154 | } | |
155 | else | |
156 | AliError(Form("Wrong energy %f and/or amplitude %f\n", ei, E())); | |
157 | } | |
158 | if (wtot>0) { | |
159 | xMean /= wtot ; | |
160 | zMean /= wtot ; | |
161 | } | |
162 | else | |
163 | AliError(Form("Wrong weight %f\n", wtot)); | |
164 | ||
165 | ||
166 | // Calculates the dispersion and second momenta | |
167 | Double_t d=0. ; | |
168 | Double_t dxx = 0.; | |
169 | Double_t dzz = 0.; | |
170 | Double_t dxz = 0.; | |
171 | for(Int_t iDigit=0; iDigit < GetNCells(); iDigit++) { | |
172 | Float_t xi ; | |
173 | Float_t zi ; | |
174 | phosgeom->AbsToRelNumbering(GetCellAbsId(iDigit), relid) ; | |
175 | phosgeom->RelPosInModule(relid, xi, zi); | |
176 | Double_t ei=GetCellAmplitudeFraction(iDigit) ; | |
177 | if (E() > 0 && ei > 0) { | |
178 | Float_t w = TMath::Max( 0., logWeight + TMath::Log(ei/E()) ) ; | |
179 | d += w*((xi-xMean)*(xi-xMean) + (zi-zMean)*(zi-zMean) ) ; | |
180 | dxx += w * xi * xi ; | |
181 | dzz += w * zi * zi ; | |
182 | dxz += w * xi * zi ; | |
183 | } | |
184 | else | |
185 | AliError(Form("Wrong energy %f and/or amplitude %f\n", ei, E())); | |
186 | } | |
187 | ||
188 | if (wtot>0) { | |
189 | d /= wtot ; | |
190 | dxx /= wtot ; | |
191 | dzz /= wtot ; | |
192 | dxz /= wtot ; | |
193 | dxx -= xMean * xMean ; | |
194 | dzz -= zMean * zMean ; | |
195 | dxz -= xMean * zMean ; | |
196 | SetM02(0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz )) ; | |
197 | SetM20(0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz )); | |
198 | } | |
199 | else{ | |
200 | AliError(Form("Wrong weight %f\n", wtot)); | |
201 | d=0. ; | |
202 | SetM20(0.) ; | |
203 | SetM02(0.) ; | |
204 | } | |
205 | ||
206 | if (d>=0) | |
207 | SetDispersion(TMath::Sqrt(d)) ; | |
208 | else | |
209 | SetDispersion(0) ; | |
210 | ||
211 | ||
212 | // Correction for the depth of the shower starting point (TDR p 127) | |
213 | Float_t para = 0.925 ; | |
214 | Float_t parb = 6.52 ; | |
215 | ||
216 | TVector3 vInc ; | |
217 | phosgeom->GetIncidentVector(vtx,phosMod,xMean,zMean,vInc) ; | |
218 | ||
219 | Float_t depthx = 0.; | |
220 | Float_t depthz = 0.; | |
221 | if (E()>0&&vInc.Y()!=0.) { | |
222 | depthx = ( para * TMath::Log(E()) + parb ) * vInc.X()/TMath::Abs(vInc.Y()) ; | |
223 | depthz = ( para * TMath::Log(E()) + parb ) * vInc.Z()/TMath::Abs(vInc.Y()) ; | |
224 | } | |
225 | else | |
226 | AliError(Form("Wrong amplitude %f\n", E())); | |
227 | ||
228 | xMean-= depthx ; | |
229 | zMean-= depthz ; | |
230 | ||
231 | //Go to the global system | |
232 | TVector3 gps ; | |
233 | phosgeom->Local2Global(phosMod, xMean, zMean, gps) ; | |
c8fe2783 | 234 | SetPositionAt(gps[0],0) ; |
235 | SetPositionAt(gps[1],1) ; | |
236 | SetPositionAt(gps[2],2) ; | |
914d1bb7 | 237 | } |