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