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2 | Geant4 8.2 - patch-01 Release Notes |
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3 | ----------------------------------- |
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4 | |
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5 | 23 February 2007 |
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6 | |
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7 | List of fixes included in this public patch since the public release 8.2: |
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8 | |
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9 | o Geometry: |
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10 | -------- |
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11 | + management: |
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12 | o Added flag to G4VPhysicalVolume::CheckOverlaps() method for |
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13 | controlling verbosity. By default, verbosity is ON. |
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14 | + navigation: |
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15 | o In G4Navigator, forcing call to CheckOverlaps() on the current |
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16 | volume before event abortion for cases of stuck tracks. |
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17 | o G4PropagatorInField: implemented ClearPropagatorState() |
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18 | to clear track-dependent state (safety, zero-steps, loop flag. etc...). |
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19 | Call to this method becomes mandatory in G4Transportation for each new |
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20 | track to overcome side effects of safety inconsistency in presence of |
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21 | geometry overlaps. |
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22 | + solids/specific: |
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23 | o Do not scale reducible-polygon in G4Polyhedra::Reset() method. |
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24 | The 'original_parameters' structure offered as input through the |
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25 | accessors are always assumed to be already scaled by the |
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26 | 'cos(0.5*phiTotal/theNumSide)' factor. |
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27 | Addresses problem report #873. |
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28 | o Fix in G4PolyconeSide::DistanceAway() for correct estimation of |
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29 | distance for the case of Phi sections. |
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30 | Addresses problem report #598. |
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31 | + volumes: |
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32 | o Added flag for controlling verbosity to CheckOverlaps() method for |
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33 | G4PVPlacement and G4PVParameterised. By default, verbosity is ON. |
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34 | |
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35 | o Global: |
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36 | ------ |
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37 | + Changed date for patch-01 to release 8.2. |
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38 | |
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39 | o Electromagnetic processes: |
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40 | ------------------------- |
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41 | + standard: |
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42 | o G4UrbanMscModel: |
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43 | - Fix in the single scattering code for heavy particles, now the code |
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44 | can be used with skin=1 e+/e- and for heavy particles as well. |
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45 | - Removed unecessary call to G4Navigator location method. |
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46 | - Added protection inside lateral displacement sampling against cases |
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47 | of TrueStepLength < GeomStepLength. |
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48 | - Added protections against NaN values in two places: sampling of |
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49 | theta when tau=0 in lateral displacement, and in method |
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50 | ComputeTrueStepLength() for the case of zero true length. |
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51 | o G4MultipleScattering: fix to allow for reinitialisation of model |
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52 | parameters between runs. |
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53 | o Use SetEmModel(index) and added SetFluctModel() from |
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54 | G4VEnergyLossProcess in eIonisation, hIonisation, ionIonisation, |
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55 | eBremstrahlung. |
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56 | + utils: |
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57 | o Fixed a problem happening in interactive sessions when activating or |
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58 | deactivating processes; the problem resulting in building wrong dEdx |
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59 | tables for e+- and muons. Modified classes are: G4LossTableBuilder, |
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60 | G4LossTableManager and G4VEmEnergyLossProcess. |
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61 | New tables are added for e+- and muons ionisation additionally to |
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62 | total energy loss tables. |
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63 | |
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64 | o Hadronic Processes: |
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65 | ------------------ |
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66 | + models/binary_cascade: |
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67 | o G4BinaryCascade::Capture(): added protection against division by zero. |
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68 | + models/chiral_inv_phase_space: |
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69 | o Fixed cases of division by 0 in G4Quasmon and G4QNucleus. |
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70 | and other cases of generation of NaN. |
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71 | Reduces segmentation faults in CHIPS-based models and physics lists |
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72 | such as QGSC. |
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73 | o Fixed bug of generation of NaN in G4QElastic observed in complicated |
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74 | event for the multi-projectile case. |
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75 | Reduces segmentation faults in elastic scattering. |
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76 | + models/de_excitation: |
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77 | o Evaporation: added protection to exclude negative probabilities from |
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78 | the "competitive channel sum". Together with the fix below for fission |
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79 | this should only happen due to a precision error, but is protected |
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80 | nonetheless. |
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81 | o Fission: fixed probability to no longer be negative. Is now equivalent |
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82 | to what is written in the Physics Reference Manual. |
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83 | The above two fixes also affect the precompound model which invokes |
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84 | these models. |
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85 | o Fission: fixed several memory leaks in G4ParaFissionModel. |
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86 | + models/low_energy: |
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87 | o G4LElastic: added protection against sqrt() of negative value. |
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88 | + models/management: |
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89 | o For error reporting, added model name arguments and default names to |
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90 | constructors for classes G4HadronicInteraction, G4InelasticInteraction, |
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91 | G4VIntraNuclearTransportModel and G4VPreCompoundModel. |
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92 | + models/neutron_hp: |
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93 | o Fixed potential divisions by zero in: G4NeutronHPVector, |
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94 | G4NeutronHPLevel and G4NeutronHPInterpolator. |
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95 | + models/parton_string/hadronization: |
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96 | o G4ExcitedStringDecay::EnergyAndMomentumCorrector(): fixed bug which |
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97 | did stop correction even if not yet converged; check on convergence |
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98 | must check that scale-1 is close to 0, and not less than 0. |
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99 | + models/parton_string/management: |
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100 | o Debugged method Dump() added in G4InteractionContent to print object. |
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101 | o Debugged output in G4VPartonStringModel checking E-p conservation of |
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102 | string model. |
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103 | The above two points provide improved, more detailed verbose output. |
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104 | + models/parton_string/qgsm: |
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105 | o Corrected E-p non-conservation in QGS. In G4QGSMSplitableHadron, |
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106 | the smaller of the lightcone momenta Q+/Q- was ignored. |
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107 | o Fixed division by 0 in G4QGSMSplitableHadron::SampleX(). |
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108 | o Added debugging output to several classes. |
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109 | + models/util: |
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110 | o Added method to G4Parton for setting momentum using both + and - |
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111 | momentum component. Should help in improving shower shapes. |
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112 | o G4Fragment: more info on warning output of negative excitation energy. |
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113 | + processes: |
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114 | o Added process names to G4HadronElasticProcess, G4HadronCaptureProcess, |
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115 | G4HadronFissionProcess. This will allow more detailed error reporting. |
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116 | o Cleaned up commented-out code. |
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117 | + stopping: |
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118 | o G4MuMinusCaptureCascade: added sampling of random vector of e- in |
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119 | decay; added factor 2 in potential energy - fixing decay spectrum. |
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120 | o G4MuonMinusCaptureAtRest: fixed problem for the case when isotope |
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121 | vector is undefined. Force to use round 'targetA'. |
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122 | Addressing problem report #926. |
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123 | + util: |
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124 | o G4HadFinalState: corrected initialisation of energy deposition. |
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125 | Fix affects elastically scattered neutrons and probably most |
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126 | hadronic models. Reduces the number of events in which the summed |
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127 | energy of final particles exceeds that of the incident particle. |
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128 | |
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129 | o Materials: |
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130 | --------- |
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131 | + G4Material: fill fAtomVector in the case when material is built |
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132 | from element mass fractions, allowing for low-energy package to |
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133 | use NIST G4_WATER. |
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134 | + G4NistMaterialBuilder: added liquids O2 and N2. |
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135 | + G4NistElementBuilder: added protection for Z<=101. |
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136 | |
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137 | o Physics Lists: |
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138 | ------------- |
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139 | + Fix in QGSP_BIC_HP list: activated use of HP elastic. |
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140 | + G4HadronElasticPhysics: set limits on low energy and QElastic to zero. |
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141 | + Fixed special cuts for LBE physics list. |
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142 | + Added set min/max Energy and Inelastic Energy to NeutronHP builder. |
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143 | + G4EmStandardPhysics: use G4hMultipleScattering for muons and removed |
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144 | extra printouts. Use default multiple-scattering setup in |
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145 | G4EmStandardPhysics72. |
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146 | |
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147 | o Run: |
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148 | --- |
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149 | + Fix in method G4RunManager::NumberOfEventToBeStored(). |
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150 | Addressing problem report #925. |
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151 | + Added protection against missing particle types before |
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152 | BuildPhysicsTable() is invoked. Addressing problem report #923. |
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153 | |
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154 | o Transportation: |
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155 | -------------- |
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156 | + G4Transportation: calling PropagatorInField to clear state for new |
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157 | track. This addresses a reliabilitiy problem observed by ATLAS; the |
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158 | fix is related to overlaps in the geometry, and consists in clearing |
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159 | the safety value, which may become multivalued due to overlaps in the |
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160 | geometry, and thus can become invalid for a new track in an overlap |
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161 | region... |
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162 | + Added protection against zero 'velocity' in method |
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163 | G4Transportation::AlongStep(). |
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164 | |
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165 | o Configuration: |
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166 | ------------- |
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167 | + Updated Configure script to prompt for new version of G4EMLOW data set. |
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168 | |
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169 | o Data Sets: |
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170 | --------- |
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171 | + New data set G4EMLOW4.2: correction to Auger data. |
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172 | |
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173 | o Examples: |
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174 | -------- |
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175 | + Updated reference outputs. |
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176 | + advanced/underground_physics |
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177 | o Removed uninitialized 'UserLimitsForXenon'. |
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178 | + extended/extended/TestEm7 |
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179 | o Cleanup of macros. |
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180 | + extended/electromagnetic/TestEm16 |
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181 | o Added HistoManager and HistoMessenger and commands to modify |
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182 | upper step limit. Minor fix to GNUmakefile. |
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183 | + extended/radioactivedecay/exrdm |
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184 | o Fixed usage of physics-lists and histograms |
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185 | + extended/runAndEvent/RE02 |
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186 | o Fixed missing NULL pointer protection in ComputeMaterial() method. |
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187 | |
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188 | ---------------------------------------------------------------------------- |
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189 | |
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190 | Technical Notes |
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191 | --------------- |
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192 | |
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193 | o This patch should be applied on top of release 8.2 |
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194 | o Technical notes distributed for release 8.2 are also applicable and |
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195 | valid for this patch. |
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196 | |
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197 | The code and rebuilt binary libraries for release 8.2 are available |
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198 | through our "Source Code" Web page: |
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199 | http://cern.ch/geant4/support/download.shtml |
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200 | |
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201 | Please refer to the Geant4 User Documentation: |
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202 | http://cern.ch/geant4/support/userdocuments.shtml |
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203 | for further information about using Geant4. |
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