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7607cc90 | 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 | // AliESDCaloCluster 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" |
7607cc90 | 34 | #include "AliPHOSEsdCluster.h" |
35 | #include "AliPHOSCalibData.h" | |
36 | #include "AliESDCaloCells.h" | |
37 | ||
38 | ClassImp(AliPHOSEsdCluster) | |
39 | ||
40 | //____________________________________________________________________________ | |
41 | AliPHOSEsdCluster::AliPHOSEsdCluster() : | |
42 | AliESDCaloCluster(),fRecalibrated(0) | |
43 | { | |
44 | // ctor | |
45 | } | |
46 | //____________________________________________________________________________ | |
47 | AliPHOSEsdCluster::AliPHOSEsdCluster(const AliESDCaloCluster & clu) : | |
48 | AliESDCaloCluster(clu),fRecalibrated(0) | |
49 | { | |
50 | // cpy ctor | |
51 | } | |
52 | ||
53 | //____________________________________________________________________________ | |
54 | AliPHOSEsdCluster::~AliPHOSEsdCluster() | |
55 | { | |
56 | // dtor | |
57 | } | |
58 | //____________________________________________________________________________ | |
59 | void AliPHOSEsdCluster::Recalibrate(AliPHOSCalibData * calibData,AliESDCaloCells *phsCells){ | |
60 | //If not done yet, apply recalibration coefficients to energies list | |
08a309ed | 61 | //NOTE that after recalibration fCellsAmpFraction contains not FRACTION but FULL energy |
62 | ||
7607cc90 | 63 | if(fRecalibrated) |
a699cc1a | 64 | return ; |
7607cc90 | 65 | |
66 | if(!calibData) | |
67 | return ; | |
a699cc1a | 68 | |
7607cc90 | 69 | AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ; |
70 | if(!phosgeom) | |
71 | AliFatal("AliPHOSGeometry was not contructed\n") ; | |
a699cc1a | 72 | |
7607cc90 | 73 | for(Int_t i=0; i<fNCells; i++){ |
74 | Int_t relId[4]; | |
75 | phosgeom->AbsToRelNumbering(fCellsAbsId[i],relId) ; | |
76 | Int_t module = relId[0]; | |
77 | Int_t column = relId[3]; | |
78 | Int_t row = relId[2]; | |
08a309ed | 79 | Double_t energy = phsCells->GetCellAmplitude(fCellsAbsId[i]) ; |
80 | fCellsAmpFraction[i]*=energy*calibData->GetADCchannelEmc(module,column,row); | |
7607cc90 | 81 | } |
a699cc1a | 82 | |
7607cc90 | 83 | fRecalibrated=kTRUE; |
84 | } | |
85 | //____________________________________________________________________________ | |
86 | void AliPHOSEsdCluster::EvalAll(Float_t logWeight, TVector3 &vtx){ | |
87 | //If recalibrated - recalculate all cluster parameters | |
88 | if(!fRecalibrated) | |
89 | return ; | |
90 | ||
91 | EvalEnergy() ; //Energy should be evaluated first | |
92 | EvalCoord(logWeight, vtx) ; | |
93 | ||
94 | } | |
95 | //____________________________________________________________________________ | |
96 | void AliPHOSEsdCluster::EvalEnergy(){ | |
97 | if(!fRecalibrated) // no need to recalibrate | |
98 | return ; | |
99 | ||
100 | fEnergy=0. ; | |
101 | for(Int_t iDigit=0; iDigit<fNCells; iDigit++) { | |
102 | fEnergy+=fCellsAmpFraction[iDigit] ; | |
103 | } | |
a699cc1a | 104 | //Correct for nonlinearity later |
7607cc90 | 105 | } |
106 | //____________________________________________________________________________ | |
25312a8e | 107 | void AliPHOSEsdCluster::EnergyCorrection(){ |
108 | //apply nonlinearity correction | |
109 | fEnergy = AliPHOSReconstructor::CorrectNonlinearity(fEnergy) ; | |
7607cc90 | 110 | } |
111 | //____________________________________________________________________________ | |
112 | void AliPHOSEsdCluster::EvalPID(AliPHOSPIDv1 * /*pid*/){ | |
113 | //re-evaluate identification parameters | |
114 | // pid->CalculatePID(fEnergy,fDispersion,fEmcCpvDistance,tof,fPID) ; | |
115 | // pid->CalculatePID(fEnergy,fDispersion,fM20,fM02,fEmcCpvDistance,tof,fPID) ; | |
116 | } | |
117 | //____________________________________________________________________________ | |
118 | void AliPHOSEsdCluster::EvalCoord(Float_t logWeight, TVector3 &vtx) | |
119 | { | |
120 | // Calculates new center of gravity in the local PHOS-module coordinates | |
121 | // and tranfers into global ALICE coordinates | |
122 | // Calculates Dispersion and main axis | |
123 | if(!fRecalibrated) // no need to recalibrate | |
124 | return ; | |
125 | ||
126 | Float_t wtot = 0. ; | |
127 | Int_t relid[4] ; | |
128 | Int_t phosMod=0 ; | |
129 | Float_t xMean = 0. ; | |
130 | Float_t zMean = 0. ; | |
131 | ||
132 | AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ; | |
133 | if(!phosgeom) | |
134 | AliFatal("AliPHOSGeometry was not contructed\n") ; | |
135 | ||
136 | for(Int_t iDigit=0; iDigit<fNCells; iDigit++) { | |
137 | Float_t xi ; | |
138 | Float_t zi ; | |
139 | phosgeom->AbsToRelNumbering(fCellsAbsId[iDigit], relid) ; | |
140 | phosgeom->RelPosInModule(relid, xi, zi); | |
141 | phosMod=relid[0] ; | |
142 | Double_t ei=fCellsAmpFraction[iDigit] ; | |
143 | if (fEnergy>0 && ei>0) { | |
144 | Float_t w = TMath::Max( 0., logWeight + TMath::Log(ei/fEnergy) ) ; | |
145 | xMean+= xi * w ; | |
146 | zMean+= zi * w ; | |
147 | wtot += w ; | |
148 | } | |
149 | else | |
150 | AliError(Form("Wrong energy %f and/or amplitude %f\n", ei, fEnergy)); | |
151 | } | |
152 | if (wtot>0) { | |
153 | xMean /= wtot ; | |
154 | zMean /= wtot ; | |
155 | } | |
156 | else | |
157 | AliError(Form("Wrong weight %f\n", wtot)); | |
158 | ||
159 | ||
160 | // Calculates the dispersion and second momenta | |
161 | Double_t d=0. ; | |
162 | Double_t dxx = 0.; | |
163 | Double_t dzz = 0.; | |
164 | Double_t dxz = 0.; | |
165 | for(Int_t iDigit=0; iDigit < fNCells; iDigit++) { | |
7607cc90 | 166 | Float_t xi ; |
167 | Float_t zi ; | |
168 | phosgeom->AbsToRelNumbering(fCellsAbsId[iDigit], relid) ; | |
169 | phosgeom->RelPosInModule(relid, xi, zi); | |
170 | Double_t ei=fCellsAmpFraction[iDigit] ; | |
171 | if (fEnergy>0 && ei>0) { | |
172 | Float_t w = TMath::Max( 0., logWeight + TMath::Log(ei/fEnergy) ) ; | |
173 | d += w*((xi-xMean)*(xi-xMean) + (zi-zMean)*(zi-zMean) ) ; | |
174 | dxx += w * xi * xi ; | |
175 | dzz += w * zi * zi ; | |
176 | dxz += w * xi * zi ; | |
177 | } | |
178 | else | |
179 | AliError(Form("Wrong energy %f and/or amplitude %f\n", ei, fEnergy)); | |
180 | } | |
181 | ||
182 | if (wtot>0) { | |
183 | d /= wtot ; | |
184 | dxx /= wtot ; | |
185 | dzz /= wtot ; | |
186 | dxz /= wtot ; | |
187 | dxx -= xMean * xMean ; | |
188 | dzz -= zMean * zMean ; | |
189 | dxz -= xMean * zMean ; | |
190 | fM02 = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ; | |
191 | fM20 = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ; | |
192 | } | |
193 | else{ | |
194 | AliError(Form("Wrong weight %f\n", wtot)); | |
195 | d=0. ; | |
196 | fM20=0. ; | |
197 | fM02=0. ; | |
198 | } | |
199 | ||
200 | if (d>=0) | |
201 | fDispersion = TMath::Sqrt(d) ; | |
202 | else | |
203 | fDispersion = 0 ; | |
204 | ||
205 | ||
206 | // Correction for the depth of the shower starting point (TDR p 127) | |
207 | Float_t para = 0.925 ; | |
208 | Float_t parb = 6.52 ; | |
209 | ||
210 | TVector3 vInc ; | |
211 | phosgeom->GetIncidentVector(vtx,phosMod,xMean,zMean,vInc) ; | |
212 | ||
213 | Float_t depthx = 0.; | |
214 | Float_t depthz = 0.; | |
215 | if (fEnergy>0&&vInc.Y()!=0.) { | |
216 | depthx = ( para * TMath::Log(fEnergy) + parb ) * vInc.X()/TMath::Abs(vInc.Y()) ; | |
217 | depthz = ( para * TMath::Log(fEnergy) + parb ) * vInc.Z()/TMath::Abs(vInc.Y()) ; | |
218 | } | |
219 | else | |
220 | AliError(Form("Wrong amplitude %f\n", fEnergy)); | |
221 | ||
222 | xMean-= depthx ; | |
223 | zMean-= depthz ; | |
224 | ||
225 | //Go to the global system | |
226 | TVector3 gps ; | |
227 | phosgeom->Local2Global(phosMod, xMean, zMean, gps) ; | |
228 | fGlobalPos[0]=gps[0] ; | |
229 | fGlobalPos[1]=gps[1] ; | |
230 | fGlobalPos[2]=gps[2] ; | |
231 | } |