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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 | ||
16 | ||
386aef34 | 17 | //_________________________________________________________________________ |
cbd576a6 | 18 | // Class for the management by the CPV reconstruction. |
386aef34 | 19 | //// |
cbd576a6 | 20 | //*-- Author : Boris Polichtchouk (IHEP, Protvino) 6 Mar 2001 |
21 | // | |
22 | // --- ROOT system --- | |
23 | ||
24 | // --- Standard library --- | |
25 | ||
cbd576a6 | 26 | // --- AliRoot header files --- |
27 | ||
28 | #include "AliPHOSRecCpvManager.h" | |
e957fea8 | 29 | #include "AliPHOSGeometry.h" |
30 | #include "AliPHOSLoader.h" | |
cbd576a6 | 31 | |
32 | ClassImp(AliPHOSRecCpvManager) | |
33 | ||
34 | //____________________________________________________________________________ | |
35 | ||
36 | AliPHOSRecCpvManager::AliPHOSRecCpvManager() | |
37 | { | |
133fff9a | 38 | // Put a comment here |
cbd576a6 | 39 | |
40 | fOneGamChisqCut = 3.; // If Chi2/dof > fOneGamChisqCut, split point. | |
41 | ||
42 | fOneGamInitialStep = 0.00005; | |
43 | fOneGamChisqMin = 1.; | |
44 | fOneGamStepMin = 0.0005; | |
45 | fOneGamNumOfIterations = 50; | |
46 | ||
47 | fTwoGamInitialStep = 0.00005; | |
48 | fTwoGamChisqMin = 1.; | |
49 | fTwoGamEmin = 0.1; | |
50 | fTwoGamStepMin = 0.00005; | |
51 | fTwoGamNumOfIterations = 50; | |
52 | ||
53 | // fThr0 = 0.0285; // Min. energy of rec. point. If E<fThr0, point deleted. | |
54 | // fSqdCut = 3.; // Min. distance (in cm) between two rec points. | |
55 | ||
56 | fThr0 = 0.; | |
57 | fSqdCut = 0.; | |
58 | ||
59 | SetTitle("Cpv Reconstruction Manager"); | |
60 | } | |
61 | ||
133fff9a | 62 | AliPHOSRecCpvManager::~AliPHOSRecCpvManager(void) |
63 | { | |
64 | // Put a comment here | |
65 | } | |
cbd576a6 | 66 | |
90cceaf6 | 67 | Float_t AliPHOSRecCpvManager::Dispersion(Float_t etot, Float_t ai) const |
cbd576a6 | 68 | { |
69 | //"Dispresion" of energy deposition in the cell. | |
133fff9a | 70 | // etot is the total shower energy, ai is the |
cbd576a6 | 71 | // calculated cell response, |
133fff9a | 72 | // ei is the measured cell response. |
cbd576a6 | 73 | |
133fff9a | 74 | const Float_t kConst = 1.5; |
75 | return kConst*ai*(1.-ai/etot); | |
cbd576a6 | 76 | } |
77 | ||
386aef34 | 78 | Float_t AliPHOSRecCpvManager::OneGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& Gi) const |
cbd576a6 | 79 | { |
80 | //"Chi2" for one cell. | |
133fff9a | 81 | // etot is the total "shower" energy, ai is the |
cbd576a6 | 82 | // calculated cell response, |
133fff9a | 83 | // ei is the measured cell response. |
cbd576a6 | 84 | |
133fff9a | 85 | const Float_t kConst = 1.5; |
cbd576a6 | 86 | |
133fff9a | 87 | Float_t da = ai - ei; |
88 | Float_t d = kConst*ai*(1.-ai/etot); | |
cbd576a6 | 89 | |
133fff9a | 90 | Float_t dd = da/d; |
91 | Gi = dd*(2.- dd*kConst*(1.-2.*ai/etot)); | |
cbd576a6 | 92 | |
133fff9a | 93 | Info("OneGamChi2", " OneGamChi2 (ai,ei,etot,&Gi,chi2) %f %f %f %f %f", ai, ei, etot, Gi, da*da/d ); |
cbd576a6 | 94 | |
133fff9a | 95 | return da*da/d; |
cbd576a6 | 96 | |
97 | } | |
98 | ||
133fff9a | 99 | Float_t AliPHOSRecCpvManager::TwoGamChi2(Float_t ai, Float_t ei, Float_t etot, Float_t& gi) const |
cbd576a6 | 100 | { |
133fff9a | 101 | // Put a comment here |
cbd576a6 | 102 | |
133fff9a | 103 | const Float_t kConst = 1.5; |
cbd576a6 | 104 | |
133fff9a | 105 | Float_t da = ai - ei; |
106 | Float_t d = kConst*ai*(1.-ai/etot); | |
cbd576a6 | 107 | |
133fff9a | 108 | Float_t dd = da/d; |
109 | gi = dd*(2.- dd*kConst*(1.-2.*ai/etot)); | |
cbd576a6 | 110 | |
133fff9a | 111 | return da*da/d; |
cbd576a6 | 112 | |
113 | } | |
114 | ||
133fff9a | 115 | void AliPHOSRecCpvManager::AG(Float_t ei, Float_t xi, Float_t yi, Float_t& ai, Float_t& gxi, Float_t& gyi ) |
cbd576a6 | 116 | { |
133fff9a | 117 | //Calculates amplitude (ai) and gradients (gxi, gyi) of CPV pad response. |
118 | //Integrated response (total "shower energy") is e, | |
119 | //xi and yi are the distances along x and y from reference point | |
cbd576a6 | 120 | // to the pad center. |
121 | ||
88cb7938 | 122 | AliPHOSGeometry * geom = AliPHOSLoader::GetPHOSGeometry(); |
123 | ||
133fff9a | 124 | Float_t celZ = geom->GetPadSizeZ(); |
125 | Float_t celY = geom->GetPadSizePhi(); | |
cbd576a6 | 126 | |
133fff9a | 127 | // // Info("AG", "celZ: %f celY: %f", celZ, celY) ; |
cbd576a6 | 128 | |
133fff9a | 129 | Float_t dx = celZ/2.; |
130 | Float_t dy = celY/2.; | |
cbd576a6 | 131 | |
133fff9a | 132 | // // Float_t x = xi*celZ; |
133 | // // Float_t y = yi*celZ; | |
cbd576a6 | 134 | |
133fff9a | 135 | Float_t x = xi*celZ; |
136 | Float_t y = yi*celY; | |
cbd576a6 | 137 | |
133fff9a | 138 | Float_t e = ei; |
cbd576a6 | 139 | |
133fff9a | 140 | Float_t a = Fcml(x+dx,y+dy) - Fcml(x+dx,y-dy) - Fcml(x-dx,y+dy) + Fcml(x-dx,y-dy); |
141 | ai = a*e; | |
cbd576a6 | 142 | |
143 | ||
133fff9a | 144 | Float_t gx = GradX(x+dx,y+dy) - GradX(x+dx,y-dy) - GradX(x-dx,y+dy) + GradX(x-dx,y-dy); |
145 | gxi = gx*e*e; | |
cbd576a6 | 146 | |
133fff9a | 147 | Float_t gy = GradY(x+dx,y+dy) - GradY(x+dx,y-dy) - GradY(x-dx,y+dy) + GradY(x-dx,y-dy); |
148 | gyi = gy*e*e; | |
cbd576a6 | 149 | |
150 | } | |
151 | ||
152 | Float_t AliPHOSRecCpvManager::Fcml(Float_t x, Float_t y) | |
153 | { | |
154 | //Cumulative function | |
155 | ||
133fff9a | 156 | const Float_t ka = 1.0; |
157 | const Float_t kb = 0.70; | |
cbd576a6 | 158 | |
133fff9a | 159 | Float_t fff = TMath::ATan(x*y/( kb*TMath::Sqrt( (kb*kb) + x*x+y*y))) |
160 | - TMath::ATan(x*y/(3*kb*TMath::Sqrt((3*kb)*(3*kb) + x*x+y*y))) | |
161 | + TMath::ATan(x*y/(5*kb*TMath::Sqrt((5*kb)*(5*kb) + x*x+y*y))) | |
162 | - TMath::ATan(x*y/(7*kb*TMath::Sqrt((7*kb)*(7*kb) + x*x+y*y))) | |
163 | + TMath::ATan(x*y/(9*kb*TMath::Sqrt((9*kb)*(9*kb) + x*x+y*y))); | |
cbd576a6 | 164 | |
386aef34 | 165 | Float_t fcml = ka*fff/TMath::TwoPi(); |
133fff9a | 166 | // Info("Fcml", "fcml: %f", fcml) ; |
167 | return fcml; | |
cbd576a6 | 168 | |
169 | } | |
170 | ||
171 | ||
172 | Float_t AliPHOSRecCpvManager::GradX(Float_t x, Float_t y) | |
173 | { | |
133fff9a | 174 | // Put a comment here |
cbd576a6 | 175 | |
133fff9a | 176 | const Float_t ka = 1.0; |
177 | const Float_t kb = 0.70; | |
cbd576a6 | 178 | |
133fff9a | 179 | Float_t skv = kb*kb + x*x + y*y; |
cbd576a6 | 180 | |
133fff9a | 181 | Float_t gradient = y*(1.-x*x/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y) |
182 | - y*(1.-x*x/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y) | |
183 | + y*(1.-x*x/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y) | |
184 | - y*(1.-x*x/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y) | |
185 | + y*(1.-x*x/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y); | |
cbd576a6 | 186 | |
386aef34 | 187 | Float_t grad = ka*gradient/TMath::TwoPi(); |
133fff9a | 188 | return grad; |
cbd576a6 | 189 | } |
190 | ||
191 | ||
192 | Float_t AliPHOSRecCpvManager::GradY(Float_t x, Float_t y) | |
193 | { | |
133fff9a | 194 | // Put a comment here |
cbd576a6 | 195 | |
386aef34 | 196 | const Float_t ka = 1.0; |
133fff9a | 197 | const Float_t kb = 0.70; |
cbd576a6 | 198 | |
133fff9a | 199 | Float_t skv = kb*kb + x*x + y*y; |
200 | Float_t gradient = x*(1.-y*y/skv)* kb*TMath::Sqrt(skv)/( kb*kb*skv+x*x*y*y) | |
201 | - x*(1.-y*y/skv)*3*kb*TMath::Sqrt(skv)/((3*kb)*(3*kb)*skv+x*x*y*y) | |
202 | + x*(1.-y*y/skv)*5*kb*TMath::Sqrt(skv)/((5*kb)*(5*kb)*skv+x*x*y*y) | |
203 | - x*(1.-y*y/skv)*7*kb*TMath::Sqrt(skv)/((7*kb)*(7*kb)*skv+x*x*y*y) | |
204 | + x*(1.-y*y/skv)*9*kb*TMath::Sqrt(skv)/((9*kb)*(9*kb)*skv+x*x*y*y); | |
cbd576a6 | 205 | |
386aef34 | 206 | Float_t grad = ka*gradient/TMath::TwoPi(); |
133fff9a | 207 | return grad; |
cbd576a6 | 208 | } |
209 | ||
210 |