1 | // $Id: PmtGeometry.cc 2927 2011-06-16 18:02:41Z mabl $ |
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2 | // Author: D.Demarco, M.Pallavicini |
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3 | |
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4 | /***************************************************************************** |
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5 | * ESAF: Euso Simulation and Analysis Framework * |
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6 | * * |
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7 | * Id: PmtGeometry * |
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8 | * Package: Optics * |
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9 | * Coordinator: Marco.Pallavicini * |
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10 | * * |
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11 | *****************************************************************************/ |
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12 | |
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13 | //______________________________________________________________________________ |
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14 | // |
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15 | // Photomultiplier Geometry |
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16 | // ======================== |
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17 | // |
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18 | // Geometry descriptor of a PMT this object can be attached to any |
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19 | // Photomultiplier object In the constructor it retrieves the relevant |
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20 | // parameters from the Config object and store them in class variables Local |
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21 | // Coordinates: x,y,z |
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22 | // z is normal to the Photocathode |
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23 | // (0,0,0) is the upper left corner of the pmt photocathode |
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24 | // surface up is defined by the y axis |
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25 | // right is defined by the x axis direction left is -x |
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26 | // |
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27 | |
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28 | #include <iostream> |
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29 | #include "PmtGeometry.hh" |
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30 | #include "Photomultiplier.hh" |
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31 | #include "OpticalAdaptor.hh" |
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32 | #include "EusoMapping.hh" |
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33 | |
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34 | ClassImp(PmtGeometry) |
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35 | |
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36 | #define MAX_PIXELS 500000 |
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37 | |
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38 | // class variables with geometry parameters |
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39 | Double_t PmtGeometry::fgSide = -1.; // physical total width of the pmt |
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40 | Double_t PmtGeometry::fgDeadBorder = 0.; // thickness of external dead space |
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41 | Double_t PmtGeometry::fgDeadInner = 0.; // thickness of internal space |
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42 | // ( between pads ) |
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43 | Double_t PmtGeometry::fgPadSide = 0.; // width of one pad |
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44 | |
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45 | Int_t PmtGeometry::fgNumPads = 0; // number of active pads of this mapmt |
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46 | Int_t PmtGeometry::fgNumRows = 0; // number of rows and columns |
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47 | TVector3* PmtGeometry::fgCorners[10][10]; |
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48 | |
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49 | //______________________________________________________________________________ |
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50 | PmtGeometry::PmtGeometry(TVector3 x, TVector3 n, TVector3 m) |
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51 | : EsafConfigurable(), fPosition(x), fZAxis(n.Unit()) { |
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52 | // |
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53 | // Construtor |
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54 | // |
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55 | fXAxis = ( m.Cross(fZAxis)).Unit(); |
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56 | fYAxis = fZAxis.Cross(fXAxis); |
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57 | |
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58 | Double_t dx = fYAxis.Dot(fZAxis); |
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59 | Double_t dy = fZAxis.Dot(fXAxis); |
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60 | Double_t dz = fXAxis.Dot(fYAxis); |
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61 | |
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62 | if ( dz > PMT_TOLERANCE || dx > PMT_TOLERANCE || dy > PMT_TOLERANCE ) |
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63 | throw runtime_error(Form("Something's wrong in pmt's axis dx = %f, dy = %f, dz = %f",dx, dy, dz)); |
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64 | |
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65 | fRight = NULL; |
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66 | fLeft = NULL; |
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67 | fFront = NULL; |
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68 | fBack = NULL; |
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69 | pPmt = NULL; |
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70 | pOA = NULL; |
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71 | if ( NumPads() <= 0 ) |
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72 | SetPmtGeometry(); |
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73 | } |
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74 | |
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75 | //______________________________________________________________________________ |
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76 | PmtGeometry::~PmtGeometry() { |
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77 | // |
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78 | // Destructor |
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79 | // |
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80 | SafeDelete(pOA); |
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81 | } |
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82 | |
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83 | //______________________________________________________________________________ |
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84 | void PmtGeometry::ResetClass() { |
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85 | // |
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86 | // Reset static data members |
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87 | // |
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88 | |
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89 | fgSide = -1.; |
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90 | fgDeadBorder = 0.; |
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91 | fgDeadInner = 0.; |
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92 | |
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93 | fgPadSide = 0.; |
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94 | |
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95 | fgNumPads = 0; |
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96 | fgNumRows = 0; |
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97 | } |
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98 | |
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99 | //______________________________________________________________________________ |
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100 | void PmtGeometry::SetNearest(PmtGeometry* r, PmtGeometry* l, |
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101 | PmtGeometry* f, PmtGeometry* b) { |
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102 | // |
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103 | // Set pointers to nearest neighbors |
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104 | // |
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105 | |
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106 | fRight = r; |
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107 | fLeft = l; |
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108 | fFront = f; |
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109 | fBack = b; |
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110 | |
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111 | #ifdef DEBUG |
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112 | // cout << "Set nearest called for PMT = " << Pmt()->Id() << endl; |
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113 | // if ( b ) |
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114 | // cout << " Back = " << b->Pmt()->Id() << endl; |
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115 | // if ( f ) |
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116 | // cout << " Front = " << f->Pmt()->Id() << endl; |
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117 | // if ( r ) |
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118 | // cout << " Right = " << r->Pmt()->Id() << endl; |
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119 | // if ( l ) |
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120 | // cout << " Left = " << l->Pmt()->Id() << endl; |
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121 | #endif |
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122 | } |
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123 | |
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124 | |
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125 | //______________________________________________________________________________ |
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126 | void PmtGeometry::InsertOA( OpticalAdaptor* oa ){ |
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127 | // |
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128 | // Insert oa in front of the pmt and displace geometry of oa->GetHeight() |
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129 | // |
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130 | |
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131 | // push the pmt back |
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132 | fPosition -= GetZ()*oa->GetThickness(); |
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133 | |
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134 | oa->SetGeometry(this); |
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135 | |
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136 | SetOA(oa); |
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137 | |
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138 | } |
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139 | //______________________________________________________________________________ |
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140 | void PmtGeometry::SetPmtGeometry() { |
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141 | // |
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142 | // Set local geometry infos and global parameters only once |
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143 | // |
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144 | |
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145 | if ( fgNumPads == 0 ) { |
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146 | ConfigFileParser* conf = Config::Get()->GetCF("Electronics","Photomultiplier"); |
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147 | fgNumRows = (Int_t)conf->GetNum("Photomultiplier.PmtSide"); |
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148 | fgNumPads = fgNumRows*fgNumRows; |
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149 | fgSide = conf->GetNum("Photomultiplier.PmtSize"); |
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150 | fgDeadBorder = conf->GetNum("Photomultiplier.PmtDeadLateral"); |
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151 | fgDeadInner = conf->GetNum("Photomultiplier.PmtDeadInner"); |
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152 | fgPadSide = ( fgSide - 2*fgDeadBorder - (fgNumRows-1)*fgDeadInner ) / fgNumRows; |
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153 | |
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154 | // compute the corner position of each pad in local coordinate |
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155 | for(Int_t row=0; row<=fgNumRows; row++) { |
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156 | Double_t row_shift = fgDeadBorder + row * fgPadSide + row * fgDeadInner; |
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157 | for(Int_t col=0; col<=fgNumRows; col++) { |
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158 | Double_t col_shift = fgDeadBorder + col * fgPadSide + col * fgDeadInner; |
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159 | fgCorners[row][col] = new TVector3( col_shift, row_shift, 0. ); |
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160 | } |
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161 | } |
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162 | } |
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163 | } |
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164 | |
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165 | //______________________________________________________________________________ |
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166 | Bool_t PmtGeometry::IsInside( const Photon& ph ) const { |
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167 | // check whether a Photon is inside the geometrical acceptance of this pmt |
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168 | // it returns true when the Photon is within the external side and its |
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169 | // distance from the surface is less than PMT_TOLERANCE |
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170 | |
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171 | // check if the photon is on the cathode surface |
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172 | TVector3 a = ( ph.pos - Position()); |
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173 | Double_t b = a.Dot(Normal()); |
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174 | if ( b < 0. ) b = -b; |
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175 | if ( b > PMT_TOLERANCE ) { |
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176 | cerr<<"PmtGeometry::IsInside: photon not on PMT surface, " << b << " mm away" <<endl; |
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177 | return false; |
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178 | } |
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179 | |
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180 | // check if the photon direction is going to intersect the cathode |
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181 | b = Normal().Dot( ph.dir ); |
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182 | if ( b > -PMT_TOLERANCE ) { |
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183 | cerr<<"PmtGeometry::IsInside: photon not intersecting PMT surface"<<endl; |
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184 | return false; |
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185 | } |
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186 | |
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187 | // check if it is inside |
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188 | Double_t dx = a.Dot(GetX().Unit()); // along x is positive |
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189 | if ( dx < PMT_TOLERANCE || dx > (fgSide-PMT_TOLERANCE) ) |
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190 | return false; |
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191 | |
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192 | Double_t dy = -a.Dot(GetY().Unit()); // along y must be negative |
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193 | if ( dy < PMT_TOLERANCE || dy > (fgSide-PMT_TOLERANCE) ) |
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194 | return false; |
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195 | |
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196 | return true; |
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197 | } |
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198 | |
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199 | //______________________________________________________________________________ |
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200 | Double_t PmtGeometry::IsHit( const Photon& ph ) const { |
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201 | // |
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202 | // check whether a Photon |
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203 | // |
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204 | |
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205 | // ph is going away from cathode |
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206 | if ( ph.dir.Dot(Normal()) > -PMT_TOLERANCE ) return -1; |
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207 | |
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208 | // calculate the hit point between ph and cathode plane |
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209 | |
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210 | Photon dummy; |
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211 | dummy.pos=ph.pos-ph.dir*((ph.pos-Position()).Dot(Normal())/ph.dir.Dot(Normal())); |
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212 | dummy.dir=ph.dir; |
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213 | if ( IsInside(dummy) ){ |
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214 | cout << "PmtGeometry::IsHit\n" |
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215 | << "ph.pos = " << ph.pos << " ph.dir = " << ph.dir << endl; |
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216 | cout << "Position() = " << EVector(Position()) << " Normal() = " << EVector(Normal()) << endl; |
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217 | |
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218 | cout << "DL = " << (dummy.pos-ph.pos).Mag() << endl; |
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219 | |
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220 | return (dummy.pos-ph.pos).Mag(); |
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221 | } |
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222 | return -1; |
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223 | } |
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224 | |
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225 | //______________________________________________________________________________ |
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226 | TVector3 PmtGeometry::Center() const { |
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227 | // |
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228 | // Return the position of the center of the pmt |
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229 | // |
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230 | TVector3 a = Position() + (fgSide/2.) * GetX().Unit(); |
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231 | a += (-fgSide/2.) * GetY().Unit(); |
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232 | return a; |
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233 | } |
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234 | |
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235 | // return local coordinate position of a point in global coord |
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236 | // the transofrmation works for point on the pmt surface |
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237 | TVector3 PmtGeometry::LocalCoord( const TVector3& pos) const{ |
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238 | TVector3 diff = pos - Position(); |
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239 | Double_t deltax = diff.Dot(GetX().Unit()); |
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240 | Double_t deltay = diff.Dot(GetY().Unit()); |
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241 | return TVector3( deltax, deltay, 0.0); |
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242 | } |
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243 | |
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244 | // return the number of a Pad hit by a Photon |
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245 | Int_t PmtGeometry::Pad( const Photon& ph ) const{ |
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246 | return Pad( LocalCoord( ph.pos ) ); |
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247 | } |
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248 | |
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249 | // return the pad number corresponding to local coordinate x |
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250 | Int_t PmtGeometry::Pad( const TVector3& x) const{ |
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251 | Int_t row,col; |
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252 | |
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253 | for(row=0; row < Rows(); row++ ) { |
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254 | Double_t yy = -x.y();// y axis is negative! |
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255 | Double_t yy_low = Corner(row,0).y(); |
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256 | Double_t yy_high = Corner(row+1,0).y(); |
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257 | if ( yy > yy_low && yy < yy_high) |
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258 | break; |
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259 | } |
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260 | |
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261 | if ( row == Rows()) |
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262 | return -1; |
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263 | |
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264 | for(col=0; col < Rows(); col++ ) { |
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265 | Double_t xx = x.x(); |
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266 | Double_t xx_low = Corner(0,col).x(); |
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267 | Double_t xx_high = Corner(0,col+1).x(); |
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268 | if ( xx > xx_low && xx < xx_high) |
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269 | break; |
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270 | } |
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271 | |
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272 | if ( col == Rows()) |
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273 | return -1; |
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274 | |
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275 | return ( col + ( row*Rows() ) ); |
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276 | } |
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277 | |
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278 | //______________________________________________________________________________ |
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279 | const PmtGeometry* PmtGeometry::Nearest( OAFace side ) const { |
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280 | // |
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281 | // Nearest neighbor |
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282 | // |
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283 | switch ( side ) { |
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284 | case RIGHT: |
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285 | return fRight; // x > 0 |
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286 | break; |
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287 | case LEFT: |
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288 | return fLeft; // x < 0 |
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289 | break; |
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290 | case FRONT: |
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291 | return fFront; // y < 0 |
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292 | break; |
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293 | case BACK: |
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294 | return fBack; // y > 0 |
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295 | break; |
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296 | case TOP: |
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297 | case BOTTOM: |
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298 | default: |
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299 | break; |
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300 | } |
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301 | cerr << "Invalid side type in PmtGeometry::Nearest" << endl; |
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302 | return NULL; |
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303 | } |
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304 | |
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305 | |
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306 | //______________________________________________________________________________ |
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307 | TVector3 PmtGeometry::Position(Int_t r, Int_t c) const { |
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308 | // |
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309 | // Return the position in EUSO coordinate of the center of a pad |
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310 | // r and c are not checked |
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311 | // |
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312 | |
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313 | TVector3 p = Position(); |
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314 | p += (fgDeadBorder + fgPadSide/2 + c*(fgPadSide+fgDeadInner)) * GetX(); |
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315 | p -= (fgDeadBorder + fgPadSide/2 + r*(fgPadSide+fgDeadInner)) * GetY(); |
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316 | return p; |
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317 | } |
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318 | |
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319 | //______________________________________________________________________________ |
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320 | TVector3 PmtGeometry::Position(Int_t ch) const { |
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321 | // |
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322 | // return the position in EUSO coordinate of the center of a pad |
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323 | // ch is the channel number defined as ch = r*n+c |
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324 | // |
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325 | Int_t r = ch / Rows(); |
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326 | Int_t c = ch - r*Rows(); |
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327 | return Position(r,c); |
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328 | } |
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329 | |
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330 | //______________________________________________________________________________ |
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331 | Double_t PmtGeometry::ThetaFOV(Int_t ch) const { |
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332 | // |
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333 | // Theta in field of view (FOV) corresponding to the center of this pad |
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334 | // |
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335 | return EusoMapping::Get()->GetThetaFOV( GetUniqueId(ch) ); |
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336 | } |
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337 | |
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338 | //______________________________________________________________________________ |
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339 | Double_t PmtGeometry::PhiFOV(Int_t ch) const { |
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340 | // |
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341 | // Theta in field of view (FOV) corresponding to the center of this pad |
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342 | // |
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343 | return EusoMapping::Get()->GetPhiFOV( GetUniqueId(ch) ); |
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344 | } |
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345 | |
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346 | //______________________________________________________________________________ |
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347 | Int_t PmtGeometry::GetChannel( ChannelUniqueId chid ) const { |
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348 | // |
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349 | // Returns channel associated to unique id |
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350 | // |
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351 | if ( chid < GetStartUniqueId() ) { |
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352 | return -1; |
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353 | } |
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354 | if ( chid > GetLastUniqueId() ) { |
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355 | return -1; |
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356 | } |
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357 | return ( chid - GetStartUniqueId() ); |
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358 | } |
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