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cbd576a6 | 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 | ||
090026bf | 16 | /* $Id$ */ |
cbd576a6 | 17 | |
386aef34 | 18 | //_________________________________________________________________________ |
cbd576a6 | 19 | // Class for the management by the CPV reconstruction. |
386aef34 | 20 | //// |
cbd576a6 | 21 | //*-- Author : Boris Polichtchouk (IHEP, Protvino) 6 Mar 2001 |
22 | // | |
23 | // --- ROOT system --- | |
24 | ||
090026bf | 25 | #include <TMath.h> |
26 | ||
cbd576a6 | 27 | // --- Standard library --- |
28 | ||
cbd576a6 | 29 | // --- AliRoot header files --- |
30 | ||
31 | #include "AliPHOSRecCpvManager.h" | |
e957fea8 | 32 | #include "AliPHOSGeometry.h" |
cbd576a6 | 33 | |
34 | ClassImp(AliPHOSRecCpvManager) | |
35 | ||
36 | //____________________________________________________________________________ | |
3f7dbdb7 | 37 | AliPHOSRecCpvManager::AliPHOSRecCpvManager() : |
38 | fOneGamChisqCut(3.), | |
39 | fOneGamInitialStep(0.00005), | |
40 | fOneGamChisqMin(1.), | |
41 | fOneGamStepMin(0.0005), | |
42 | fOneGamNumOfIterations(50), | |
43 | fTwoGamInitialStep(0.00005), | |
44 | fTwoGamChisqMin(1.), | |
45 | fTwoGamEmin(0.1), | |
46 | fTwoGamStepMin(0.00005), | |
47 | fTwoGamNumOfIterations(50), | |
48 | fThr0(0.), | |
49 | fSqdCut(0.) | |
cbd576a6 | 50 | { |
133fff9a | 51 | // Put a comment here |
cbd576a6 | 52 | SetTitle("Cpv Reconstruction Manager"); |
53 | } | |
54 | ||
133fff9a | 55 | AliPHOSRecCpvManager::~AliPHOSRecCpvManager(void) |
56 | { | |
57 | // Put a comment here | |
58 | } | |
cbd576a6 | 59 | |
90cceaf6 | 60 | Float_t AliPHOSRecCpvManager::Dispersion(Float_t etot, Float_t ai) const |
cbd576a6 | 61 | { |
62 | //"Dispresion" of energy deposition in the cell. | |
133fff9a | 63 | // etot is the total shower energy, ai is the |
cbd576a6 | 64 | // calculated cell response, |
133fff9a | 65 | // ei is the measured cell response. |
cbd576a6 | 66 | |
133fff9a | 67 | const Float_t kConst = 1.5; |
68 | return kConst*ai*(1.-ai/etot); | |
cbd576a6 | 69 | } |
70 | ||
386aef34 | 71 | Float_t AliPHOSRecCpvManager::OneGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& Gi) const |
cbd576a6 | 72 | { |
73 | //"Chi2" for one cell. | |
133fff9a | 74 | // etot is the total "shower" energy, ai is the |
cbd576a6 | 75 | // calculated cell response, |
133fff9a | 76 | // ei is the measured cell response. |
cbd576a6 | 77 | |
133fff9a | 78 | const Float_t kConst = 1.5; |
cbd576a6 | 79 | |
133fff9a | 80 | Float_t da = ai - ei; |
81 | Float_t d = kConst*ai*(1.-ai/etot); | |
cbd576a6 | 82 | |
133fff9a | 83 | Float_t dd = da/d; |
84 | Gi = dd*(2.- dd*kConst*(1.-2.*ai/etot)); | |
cbd576a6 | 85 | |
133fff9a | 86 | Info("OneGamChi2", " OneGamChi2 (ai,ei,etot,&Gi,chi2) %f %f %f %f %f", ai, ei, etot, Gi, da*da/d ); |
cbd576a6 | 87 | |
133fff9a | 88 | return da*da/d; |
cbd576a6 | 89 | |
90 | } | |
91 | ||
133fff9a | 92 | Float_t AliPHOSRecCpvManager::TwoGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& gi) const |
cbd576a6 | 93 | { |
133fff9a | 94 | // Put a comment here |
cbd576a6 | 95 | |
133fff9a | 96 | const Float_t kConst = 1.5; |
cbd576a6 | 97 | |
133fff9a | 98 | Float_t da = ai - ei; |
99 | Float_t d = kConst*ai*(1.-ai/etot); | |
cbd576a6 | 100 | |
133fff9a | 101 | Float_t dd = da/d; |
102 | gi = dd*(2.- dd*kConst*(1.-2.*ai/etot)); | |
cbd576a6 | 103 | |
133fff9a | 104 | return da*da/d; |
cbd576a6 | 105 | |
106 | } | |
107 | ||
133fff9a | 108 | void AliPHOSRecCpvManager::AG(Float_t ei, Float_t xi, Float_t yi, Float_t& ai, Float_t& gxi, Float_t& gyi ) |
cbd576a6 | 109 | { |
133fff9a | 110 | //Calculates amplitude (ai) and gradients (gxi, gyi) of CPV pad response. |
111 | //Integrated response (total "shower energy") is e, | |
112 | //xi and yi are the distances along x and y from reference point | |
cbd576a6 | 113 | // to the pad center. |
114 | ||
6c8cd883 | 115 | AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ; |
88cb7938 | 116 | |
133fff9a | 117 | Float_t celZ = geom->GetPadSizeZ(); |
118 | Float_t celY = geom->GetPadSizePhi(); | |
cbd576a6 | 119 | |
133fff9a | 120 | // // Info("AG", "celZ: %f celY: %f", celZ, celY) ; |
cbd576a6 | 121 | |
133fff9a | 122 | Float_t dx = celZ/2.; |
123 | Float_t dy = celY/2.; | |
cbd576a6 | 124 | |
133fff9a | 125 | // // Float_t x = xi*celZ; |
126 | // // Float_t y = yi*celZ; | |
cbd576a6 | 127 | |
133fff9a | 128 | Float_t x = xi*celZ; |
129 | Float_t y = yi*celY; | |
cbd576a6 | 130 | |
133fff9a | 131 | Float_t e = ei; |
cbd576a6 | 132 | |
133fff9a | 133 | Float_t a = Fcml(x+dx,y+dy) - Fcml(x+dx,y-dy) - Fcml(x-dx,y+dy) + Fcml(x-dx,y-dy); |
134 | ai = a*e; | |
cbd576a6 | 135 | |
136 | ||
133fff9a | 137 | Float_t gx = GradX(x+dx,y+dy) - GradX(x+dx,y-dy) - GradX(x-dx,y+dy) + GradX(x-dx,y-dy); |
138 | gxi = gx*e*e; | |
cbd576a6 | 139 | |
133fff9a | 140 | Float_t gy = GradY(x+dx,y+dy) - GradY(x+dx,y-dy) - GradY(x-dx,y+dy) + GradY(x-dx,y-dy); |
141 | gyi = gy*e*e; | |
cbd576a6 | 142 | |
143 | } | |
144 | ||
145 | Float_t AliPHOSRecCpvManager::Fcml(Float_t x, Float_t y) | |
146 | { | |
147 | //Cumulative function | |
148 | ||
133fff9a | 149 | const Float_t ka = 1.0; |
150 | const Float_t kb = 0.70; | |
cbd576a6 | 151 | |
133fff9a | 152 | Float_t fff = TMath::ATan(x*y/( kb*TMath::Sqrt( (kb*kb) + x*x+y*y))) |
153 | - TMath::ATan(x*y/(3*kb*TMath::Sqrt((3*kb)*(3*kb) + x*x+y*y))) | |
154 | + TMath::ATan(x*y/(5*kb*TMath::Sqrt((5*kb)*(5*kb) + x*x+y*y))) | |
155 | - TMath::ATan(x*y/(7*kb*TMath::Sqrt((7*kb)*(7*kb) + x*x+y*y))) | |
156 | + TMath::ATan(x*y/(9*kb*TMath::Sqrt((9*kb)*(9*kb) + x*x+y*y))); | |
cbd576a6 | 157 | |
386aef34 | 158 | Float_t fcml = ka*fff/TMath::TwoPi(); |
133fff9a | 159 | // Info("Fcml", "fcml: %f", fcml) ; |
160 | return fcml; | |
cbd576a6 | 161 | |
162 | } | |
163 | ||
164 | ||
165 | Float_t AliPHOSRecCpvManager::GradX(Float_t x, Float_t y) | |
166 | { | |
133fff9a | 167 | // Put a comment here |
cbd576a6 | 168 | |
133fff9a | 169 | const Float_t ka = 1.0; |
170 | const Float_t kb = 0.70; | |
cbd576a6 | 171 | |
133fff9a | 172 | Float_t skv = kb*kb + x*x + y*y; |
cbd576a6 | 173 | |
133fff9a | 174 | Float_t gradient = y*(1.-x*x/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y) |
175 | - y*(1.-x*x/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y) | |
176 | + y*(1.-x*x/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y) | |
177 | - y*(1.-x*x/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y) | |
178 | + y*(1.-x*x/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y); | |
cbd576a6 | 179 | |
386aef34 | 180 | Float_t grad = ka*gradient/TMath::TwoPi(); |
133fff9a | 181 | return grad; |
cbd576a6 | 182 | } |
183 | ||
184 | ||
185 | Float_t AliPHOSRecCpvManager::GradY(Float_t x, Float_t y) | |
186 | { | |
133fff9a | 187 | // Put a comment here |
cbd576a6 | 188 | |
386aef34 | 189 | const Float_t ka = 1.0; |
133fff9a | 190 | const Float_t kb = 0.70; |
cbd576a6 | 191 | |
133fff9a | 192 | Float_t skv = kb*kb + x*x + y*y; |
193 | Float_t gradient = x*(1.-y*y/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y) | |
194 | - x*(1.-y*y/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y) | |
195 | + x*(1.-y*y/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y) | |
196 | - x*(1.-y*y/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y) | |
197 | + x*(1.-y*y/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y); | |
cbd576a6 | 198 | |
386aef34 | 199 | Float_t grad = ka*gradient/TMath::TwoPi(); |
133fff9a | 200 | return grad; |
cbd576a6 | 201 | } |
202 | ||
203 |