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14 **************************************************************************/
17 //_________________________________________________________________________
18 // Class for the management by the CPV reconstruction.
20 //*-- Author : Boris Polichtchouk (IHEP, Protvino) 6 Mar 2001
22 // --- ROOT system ---
24 // --- Standard library ---
26 // --- AliRoot header files ---
28 #include "AliPHOSRecCpvManager.h"
29 #include "AliPHOSGetter.h"
31 ClassImp(AliPHOSRecCpvManager)
33 //____________________________________________________________________________
35 AliPHOSRecCpvManager::AliPHOSRecCpvManager()
39 fOneGamChisqCut = 3.; // If Chi2/dof > fOneGamChisqCut, split point.
41 fOneGamInitialStep = 0.00005;
43 fOneGamStepMin = 0.0005;
44 fOneGamNumOfIterations = 50;
46 fTwoGamInitialStep = 0.00005;
49 fTwoGamStepMin = 0.00005;
50 fTwoGamNumOfIterations = 50;
52 // fThr0 = 0.0285; // Min. energy of rec. point. If E<fThr0, point deleted.
53 // fSqdCut = 3.; // Min. distance (in cm) between two rec points.
58 SetTitle("Cpv Reconstruction Manager");
61 AliPHOSRecCpvManager::~AliPHOSRecCpvManager(void)
66 Float_t AliPHOSRecCpvManager::Dispersion(Float_t etot, Float_t ai) const
68 //"Dispresion" of energy deposition in the cell.
69 // etot is the total shower energy, ai is the
70 // calculated cell response,
71 // ei is the measured cell response.
73 const Float_t kConst = 1.5;
74 return kConst*ai*(1.-ai/etot);
77 Float_t AliPHOSRecCpvManager::OneGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& Gi) const
79 //"Chi2" for one cell.
80 // etot is the total "shower" energy, ai is the
81 // calculated cell response,
82 // ei is the measured cell response.
84 const Float_t kConst = 1.5;
87 Float_t d = kConst*ai*(1.-ai/etot);
90 Gi = dd*(2.- dd*kConst*(1.-2.*ai/etot));
92 Info("OneGamChi2", " OneGamChi2 (ai,ei,etot,&Gi,chi2) %f %f %f %f %f", ai, ei, etot, Gi, da*da/d );
98 Float_t AliPHOSRecCpvManager::TwoGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& gi) const
100 // Put a comment here
102 const Float_t kConst = 1.5;
104 Float_t da = ai - ei;
105 Float_t d = kConst*ai*(1.-ai/etot);
108 gi = dd*(2.- dd*kConst*(1.-2.*ai/etot));
114 void AliPHOSRecCpvManager::AG(Float_t ei, Float_t xi, Float_t yi, Float_t& ai, Float_t& gxi, Float_t& gyi )
116 //Calculates amplitude (ai) and gradients (gxi, gyi) of CPV pad response.
117 //Integrated response (total "shower energy") is e,
118 //xi and yi are the distances along x and y from reference point
119 // to the pad center.
121 AliPHOSGeometry * geom = AliPHOSLoader::GetPHOSGeometry();
123 Float_t celZ = geom->GetPadSizeZ();
124 Float_t celY = geom->GetPadSizePhi();
126 // // Info("AG", "celZ: %f celY: %f", celZ, celY) ;
128 Float_t dx = celZ/2.;
129 Float_t dy = celY/2.;
131 // // Float_t x = xi*celZ;
132 // // Float_t y = yi*celZ;
139 Float_t a = Fcml(x+dx,y+dy) - Fcml(x+dx,y-dy) - Fcml(x-dx,y+dy) + Fcml(x-dx,y-dy);
143 Float_t gx = GradX(x+dx,y+dy) - GradX(x+dx,y-dy) - GradX(x-dx,y+dy) + GradX(x-dx,y-dy);
146 Float_t gy = GradY(x+dx,y+dy) - GradY(x+dx,y-dy) - GradY(x-dx,y+dy) + GradY(x-dx,y-dy);
151 Float_t AliPHOSRecCpvManager::Fcml(Float_t x, Float_t y)
153 //Cumulative function
155 const Float_t ka = 1.0;
156 const Float_t kb = 0.70;
158 Float_t fff = TMath::ATan(x*y/( kb*TMath::Sqrt( (kb*kb) + x*x+y*y)))
159 - TMath::ATan(x*y/(3*kb*TMath::Sqrt((3*kb)*(3*kb) + x*x+y*y)))
160 + TMath::ATan(x*y/(5*kb*TMath::Sqrt((5*kb)*(5*kb) + x*x+y*y)))
161 - TMath::ATan(x*y/(7*kb*TMath::Sqrt((7*kb)*(7*kb) + x*x+y*y)))
162 + TMath::ATan(x*y/(9*kb*TMath::Sqrt((9*kb)*(9*kb) + x*x+y*y)));
164 Float_t fcml = ka*fff/TMath::TwoPi();
165 // Info("Fcml", "fcml: %f", fcml) ;
171 Float_t AliPHOSRecCpvManager::GradX(Float_t x, Float_t y)
173 // Put a comment here
175 const Float_t ka = 1.0;
176 const Float_t kb = 0.70;
178 Float_t skv = kb*kb + x*x + y*y;
180 Float_t gradient = y*(1.-x*x/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y)
181 - y*(1.-x*x/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y)
182 + y*(1.-x*x/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y)
183 - y*(1.-x*x/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y)
184 + y*(1.-x*x/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y);
186 Float_t grad = ka*gradient/TMath::TwoPi();
191 Float_t AliPHOSRecCpvManager::GradY(Float_t x, Float_t y)
193 // Put a comment here
195 const Float_t ka = 1.0;
196 const Float_t kb = 0.70;
198 Float_t skv = kb*kb + x*x + y*y;
199 Float_t gradient = x*(1.-y*y/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y)
200 - x*(1.-y*y/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y)
201 + x*(1.-y*y/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y)
202 - x*(1.-y*y/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y)
203 + x*(1.-y*y/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y);
205 Float_t grad = ka*gradient/TMath::TwoPi();