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[u/mrichter/AliRoot.git] / ITS / AliITSetfSDD.cxx
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b0f5e3fc 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 **************************************************************************/
4ae5bbc4 15
88cb7938 16/* $Id$ */
b9d0a01d 17
4ae5bbc4 18#include <Riostream.h>
b0f5e3fc 19#include <TMath.h>
11ad066f 20#include <TString.h>
b0f5e3fc 21#include "AliITSetfSDD.h"
22
23////////////////////////////////////////////////////////////////////////
24// Version: 0
25// Written by Piergiorgio Cerello
26// November 23 1999
27//
b0f5e3fc 28//_____________________________________________________________________________
b669392e 29
30
b0f5e3fc 31ClassImp(AliITSetfSDD)
32
33Int_t ppower(Int_t b, Int_t e) {
e8189707 34 Int_t power = 1;
35 for(Int_t i=0; i<e; i++) power *= b;
b0f5e3fc 36 return power;
37}
38
11ad066f 39AliITSetfSDD::AliITSetfSDD(Double_t timestep, Int_t amplif)
b0f5e3fc 40{
41 // sampling time in ns
e8189707 42
11ad066f 43 fTimeDelay = 53.5;
44 if(amplif == 2) fTimeDelay = 35.5;
e8189707 45 fSamplingTime = timestep;
46
b0f5e3fc 47 fT0 = 0.;
b669392e 48 fDf = ppower(10,9)/(kMaxNofSamples*fSamplingTime);
b0f5e3fc 49
e8189707 50 Int_t i,j;
b669392e 51 for(i=0; i<kMaxNofPoles; i++) {
e8189707 52 fZeroM[i] = 0.;
53 fZeroR[i] = 0.;
54 fZeroI[i] = 0.;
55 fPoleM[i] = 0.;
56 fPoleR[i] = 0.;
57 fPoleI[i] = 0.;
b0f5e3fc 58 }
11ad066f 59 // Alice
60
48058160 61 // PASCAL amplif
62 fA0 = 5.53269815e+11;
63 fPoleM[0] = 3.;
64 fPoleR[0] = -8280000.;
65 fPoleI[0] = 0.;
66
67 if(amplif == 2) { // OLA amplif.
68 fA0 = 24000.;
69 fPoleM[0] = 1.;
11ad066f 70 fPoleR[0] = -3000000.;
71 fPoleI[0] = 4000000.;
48058160 72 fPoleM[1] = 1.;
73 fPoleR[1] = fPoleR[0];
74 fPoleI[1] = -fPoleI[0];
75 }
76
77 if( amplif == 3 ) { // old PASCAL
78 fA0 = 16500.; // AL: 16500.; // TB: 24000.; // 26000.; // 24000.; // 18000.;
79 fPoleM[0] = 1.;
80 fPoleR[0] = -4140000.; // AL: -4140000.; // TB: -3000000.; // -3750000.; // -3500000; // -3000000.;
81 fPoleI[0] = 0.; // AL: 0.; // TB: 4000000.; // 3750000.; // 3500000.; // 3000000.;
82 fPoleM[1] = 1.;
83 fPoleR[1] = fPoleR[0];
84 fPoleI[1] = -fPoleI[0];
11ad066f 85 }
b0f5e3fc 86
48058160 87 //cout << "fA0: " << fA0 << endl;
88 //cout << "fTimeDelay: " << fTimeDelay << endl;
89
11ad066f 90 // Compute Transfer Function
b0f5e3fc 91
92 Double_t PI = acos(-1.);
b669392e 93 for(i=0; i<=kMaxNofSamples/2; i++) {
b0f5e3fc 94 Double_t frequency = fDf*i;
95 Double_t VM = fA0;
96 Double_t VA = 0.;
b669392e 97 for(Int_t k=0; k<kMaxNofPoles; k++) {
e8189707 98 if(fZeroM[k]) {
99 Double_t VZR = -fZeroR[k];
100 Double_t VZI = frequency - fZeroI[k];
b0f5e3fc 101 Double_t VZM = TMath::Sqrt(VZR*VZR+VZI*VZI);
102 Double_t VZA = TMath::ATan2(VZI,VZR);
103 // cout << "VZM: " << VZM << ", VZA: " << VZA << endl;
104 // cout << "VZR: " << VZR << ", VZI: " << VZI << endl;
e8189707 105 for(j=1; j<= (Int_t) fZeroM[k]; j++) {
b0f5e3fc 106 VM *= VZM;
107 VA += VZA;
108 if(VA >= PI) VA -= (2.*PI);
109 if(VA <= -PI) VA += (2.*PI);
110 //cout << "VM: " << VM << ", VA: " << VA << endl;
111 }
112 }
113
e8189707 114 if(fPoleM[k]) {
115 Double_t VPR = -fPoleR[k];
116 Double_t VPI = frequency - fPoleI[k];
b0f5e3fc 117 Double_t VPM = TMath::Sqrt(VPR*VPR+VPI*VPI);
118 Double_t VPA = TMath::ATan2(VPI,VPR);
119 //cout << "VPM: " << VPM << ", VPA: " << VPA << endl;
120 //cout << "VPR: " << VPR << ", VPI: " << VPI << endl;
e8189707 121 for(j=1; j<= (Int_t) fPoleM[k]; j++) {
b0f5e3fc 122 VM /= VPM;
123 VA -= VPA;
124 if(VA >= PI) VA -= (2.*PI);
125 if(VA <= -PI) VA += (2.*PI);
126 //cout << "VM: " << VM << ", VA: " << VA << endl;
127 }
128 }
129 Double_t VR = VM*cos(VA);
130 Double_t VI = VM*sin(VA);
131 //cout << "VM: " << VM << ", VA: " << VA << endl;
132 //cout << "VR: " << VR << ", VI: " << VI << endl;
e8189707 133 fTfR[i] = VR*ppower(10,9);
134 fTfI[i] = VI*ppower(10,9);
135 //cout << "fTfR[" << i << "] = " << fTfR[i] << endl;
136 //cout << "fTfI[" << i << "] = " << fTfI[i] << endl;
b0f5e3fc 137 if(i) {
b669392e 138 fTfR[kMaxNofSamples-i] = fTfR[i];
139 fTfI[kMaxNofSamples-i] = -fTfI[i];
b0f5e3fc 140 }
141 }
142 }
143
144 // Compute Fourier Weights
145
b669392e 146 for(i=0; i<=kMaxNofSamples/2; i++) {
147 fWR[i] = cos(-2.*PI*i/kMaxNofSamples);
148 fWI[i] = sin(-2.*PI*i/kMaxNofSamples);
b0f5e3fc 149 if(i) {
b669392e 150 fWR[kMaxNofSamples-i] = fWR[i];
151 fWI[kMaxNofSamples-i] = -fWI[i];
b0f5e3fc 152 }
153 }
154
155}
156
e8189707 157void AliITSetfSDD::PrintElectronics()
b0f5e3fc 158{
11ad066f 159 cout << "Time Delay " << fTimeDelay << endl;
b0f5e3fc 160 cout << "Sampling Time " << fSamplingTime << endl;
b669392e 161 cout << "Number of Time Samples " << kMaxNofSamples << endl;
b0f5e3fc 162 cout << "fT0 " << fT0 << endl;
163 cout << "fDf " << fDf << endl;
164 cout << "fA0 " << fA0 << endl;
165
166 cout << "Zero's and Pole's" << endl;
e8189707 167 cout << "fZeroM " << endl;
168 Int_t i;
b669392e 169 for(i=0; i<kMaxNofPoles; i++) cout << fZeroM[i] << endl;
b0f5e3fc 170 cout << "fZero_R " << endl;
b669392e 171 for(i=0; i<kMaxNofPoles; i++) cout << fZeroR[i] << endl;
e8189707 172 cout << "fZeroI " << endl;
b669392e 173 for(i=0; i<kMaxNofPoles; i++) cout << fZeroI[i] << endl;
e8189707 174 cout << "fPoleM " << endl;
b669392e 175 for(i=0; i<kMaxNofPoles; i++) cout << fPoleM[i] << endl;
e8189707 176 cout << "fPoleR " << endl;
b669392e 177 for(i=0; i<kMaxNofPoles; i++) cout << fPoleR[i] << endl;
e8189707 178 cout << "fPoleI " << endl;
b669392e 179 for(i=0; i<kMaxNofPoles; i++) cout << fPoleI[i] << endl;
b0f5e3fc 180
181 cout << "Transfer function" << endl;
182 cout << "Real Part" << endl;
b669392e 183 for(i=0; i<kMaxNofSamples; i++) cout << fTfR[i] << endl;
b0f5e3fc 184 cout << "Imaginary Part " << endl;
b669392e 185 for(i=0; i<kMaxNofSamples; i++) cout << fTfI[i] << endl;
b0f5e3fc 186
187 cout << "Fourier Weights" << endl;
188 cout << "Real Part" << endl;
b669392e 189 for(i=0; i<kMaxNofSamples; i++) cout << fWR[i] << endl;
b0f5e3fc 190 cout << "Imaginary Part " << endl;
b669392e 191 for(i=0; i<kMaxNofSamples; i++) cout << fWI[i] << endl;
b0f5e3fc 192}
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