1 | |
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2 | Geant4 9.2-beta-01 Release Notes |
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3 | -------------------------------- |
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4 | |
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5 | 4 July 2008 |
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6 | |
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7 | List of main features and fixes included in this Beta release since 9.1.p02: |
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8 | |
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9 | o Configuration: |
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10 | ------------- |
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11 | + Integrated improvements to Qt setup. |
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12 | + Embedded AIDA setup in central configuration scripts, simplified |
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13 | GNUmakefiles in examples. |
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14 | |
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15 | o Environments: |
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16 | ------------ |
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17 | + Updated G4Py configure scripts and fixed some minor bugs. |
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18 | |
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19 | o Event |
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20 | ----- |
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21 | + Fixed problem of out of bounds array access in G4SPSEneDistribution. |
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22 | Added accessors to G4SPSAngDistribution, addressing problem report #1013. |
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23 | |
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24 | o Geometry: |
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25 | -------- |
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26 | + management: |
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27 | o G4Region: changed condition inside ScanVolumeTree() to check for the |
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28 | existence of a valid material-scanner pointer to apply the material |
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29 | scan instead of using the flag for nested structures. |
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30 | o G4GeometryManager: do not apply optimisation on the current volume |
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31 | if it has been defined as a regular structure. |
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32 | o Addresses problem report #990. |
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33 | + solids/CSG: |
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34 | o G4Tubs: fix in DistanceToIn(p,v, ...) in case of point on surface with |
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35 | very small tangent direction; now returning kInfinity and no longer zero. |
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36 | It fixes observed cases of zero value returned by both DistanceToIn() |
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37 | and DistanceToOut(), causing stuck tracks with zero step length. |
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38 | o G4Sphere: fixed calculation of roots in DistanceToOut(p,v,...) for |
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39 | theta-conical surfaces interserctions and for sTheta<=90 degree |
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40 | intersection. Addresses issue reported when running PET application |
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41 | with optical photons about mis-computation of distance on half-sphere |
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42 | constructs. |
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43 | + solids/specific: |
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44 | o Enhanced GetPointOnSurface() for generic G4Polycone and G4Polyhedra |
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45 | constructs. |
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46 | |
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47 | o Global: |
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48 | ------ |
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49 | + G4UnitsTable: added units for electric-field, V/m. |
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50 | + G4PhysicsVector: introduced cubic spline interpolation, optionally |
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51 | selectable. Optimised implementation of GetValue() method. |
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52 | + G4LPhysicsFreeVector: corrected use of GetValue() to adopt |
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53 | implementation available from the base class. |
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54 | + Modified G4RandomDirection global function to use unit radius sphere |
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55 | surface algorithm instead of 8-quadrants technique, giving ~30% |
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56 | performance boost in dedicated stress tests. |
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57 | + Changed date for 9.2-beta release. |
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58 | |
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59 | o Intercoms |
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60 | --------- |
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61 | + Added a new function in G4UIcommandTree to find a subtree. |
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62 | |
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63 | o Interfaces |
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64 | ---------- |
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65 | + Improvements for layout in Qt driver for Qt3. |
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66 | |
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67 | o Materials: |
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68 | --------- |
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69 | + G4NistElementBuilder: provide unique name for each isotope of an element. |
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70 | + G4IonisParamElm: added Fermi velocity and L-factor (both used for |
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71 | parameterizations of the effective charge and straggling of ions). |
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72 | G4IonisParamMat: use Fermi velocity and L-factor from G4IonisParamElm. |
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73 | + Added virtual destructor to G4SurfaceProperty and derivated. |
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74 | Addresses problem report #1014. |
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75 | + G4Element: added more safe check of consistence between Z and A in the |
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76 | constructor. Improved printout of errors and warnings. |
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77 | |
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78 | o Particles: |
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79 | --------- |
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80 | + Added UI command for setting the verbosity level on the particle-table. |
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81 | + Modified proton mass to be equal to 'proton_mass_c2' from updated |
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82 | PDG-2006 values in CLHEP (difference is 10 eV). |
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83 | |
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84 | o Persistency (GDML): |
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85 | ------------------ |
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86 | + Introducing GDML writer: material properties; support for parameterised |
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87 | volumes; division volumes; replica volumes; matrices; naming of physical |
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88 | volumes; Twistedtrap, Twistedtubs, Tet, Twistedbox, Twistedtrd, Hype, Orb, |
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89 | Para, Ellipsoid, Ellipticaltube, Polyhedra, Torus, Cone, Tube, Extruded, |
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90 | Boolean (intersection, subtraction, union), Reflections (using scaled |
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91 | transformation) solids; elements and composite materials. |
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92 | + Added support for modular files in GDML writer and reader. Added handling |
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93 | of precision and optional rounding of errors for imported/exported values. |
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94 | Added schema validation mechanism and schema files. |
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95 | + Added features to reader: physical-volumes name; temperature, pressure |
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96 | and state of materials; NIST support. Added support for border surface |
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97 | and skin surface properties. |
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98 | + Added optional handling if precision on values loaded. |
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99 | |
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100 | o Physics Lists: |
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101 | ------------- |
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102 | + Updated FTF* lists and physics NOT to use quasi-elastic from CHIPS. |
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103 | FTF now has quasi-elastic included in the FTF model itself. |
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104 | + Updated option2 EM physics (EMX) and added option3. For these |
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105 | options it is now defined 'linLossLimit' per particle type; |
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106 | added hadron induced bremsstrahlung and pair production; |
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107 | using Spline interpolation for physics tables. |
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108 | + New helper class G4PhysListFactory for building Physics Lists. |
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109 | + Removed obsolete class G4HadronProcessStore. |
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110 | |
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111 | o Electromagnetic Processes: |
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112 | ------------------------- |
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113 | + Low Energy: |
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114 | o Added PIXE cross section, L-shells, for protons in G4OrlicLCrossSection. |
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115 | Added semi-Empirical model implementation for L-SubShells-Cross-Section |
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116 | with protons projectiles. |
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117 | o New charge transfer process by incident protons (two cross-section and |
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118 | one final state policy classes). |
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119 | o Added Doppler broadening to G4LowEnergyCompton, based on "Y.Namito, |
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120 | S.Ban and H.Hirayama, NIM A 349, pp. 489-494, 1994". |
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121 | Added Doppler broadening in G4LowEnergyComptonPolarized, same model |
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122 | as in G4LowEnergyCompton. |
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123 | o Allow for loading the complete Auger dataset on initialization. |
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124 | o Requires new data set G4EMLOW.6.1. |
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125 | + High Energy: |
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126 | o Added new Bremsstrahlung and pair-production models for hadrons. |
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127 | o Added initialization of 'SubType' for all processes. |
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128 | + Muons: |
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129 | o Several fixes and further developments in G4Mu* models and associated |
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130 | processes. |
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131 | + Standard: |
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132 | o New multiple-scattering model G4WentzelVIModel used in new muon |
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133 | physics processes. |
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134 | o Cloned G4UrbanMscModel class into G4UrbanMscModel2; introduced several |
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135 | fixes and tunings to G4UrbanMscModel2 variant. |
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136 | o New process G4eMultipleScattering specialized for e+,e-. |
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137 | o G4eBremsstrahlungHEModel: new model, an extension of the standard |
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138 | Bremsstrahlung model but using a more sophisticated LPM approach. |
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139 | o G4PAIxSection: new functions for resonance and Rutherford collisions. |
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140 | o Fixed nuclear size correction for the G4BetheBlochModel. |
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141 | o G4ionGasIonisation: fixed bug in update of the dynamic charge of an ion. |
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142 | o G4IonFluctuations: added protection to the computation of the correction |
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143 | factor to dispersion which provide smooth transition to small velocities |
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144 | of an ion; added protection in computation of dispersion on allowing |
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145 | have a corrected dispersion below Bohr value. |
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146 | o G4eCoulombScatteringModel: speedup run-time computations using |
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147 | precomputed nuclear form-factors per element. |
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148 | o G4WaterStopping: using Spline interpolation. |
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149 | o Added initialization of 'SubType' for all processes. |
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150 | + Utils: |
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151 | o New class G4VMscModel to define general multiple-scattering parameters. |
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152 | o New class G4EmElementSelector, a helper class to sample random |
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153 | G4Element in a compound material. |
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154 | o Added new correction methods in order to provide a smooth transition |
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155 | between low-energy parameterization and Bethe-Bloch model in EM |
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156 | standard processes. Added new G4EmSaturation helper class. |
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157 | o G4VEnergyLossProcess: fixed computation of NIEL at the last step of a |
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158 | particle. |
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159 | o G4LossTableManager: fixed logic in compute dEdx table for an inactive |
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160 | process. |
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161 | + Xrays: |
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162 | o Added scintillation with Birk's law and make now use of G4EmSaturation |
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163 | to implement Birks correction. |
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164 | |
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165 | o Hadronic Processes: |
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166 | ------------------ |
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167 | + management: |
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168 | o Added class G4HadronicProcessStore, helper class to keep pointers to |
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169 | all registered hadronic processes. |
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170 | + models/coherent_elastic: |
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171 | o G4HadronElastic: added counts of abnornal sampling results and |
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172 | printing out values in the destructor. |
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173 | + models/de_excitation: |
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174 | o G4PhotonEvaporation: atomic relaxation model is no longer applied |
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175 | following internal electron conversion. Instead the vacant shell index |
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176 | is passed to radioactive decay model, where the ARM is applied. |
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177 | o Fixed minor memory leak in G4ExcitationHandler. |
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178 | + models/high_energy: |
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179 | o G4HEInelastic: removed abnormally high pt secondaries due to incident |
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180 | strange particles by prohibiting the assignment of leading particle to |
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181 | anything that goes backward in the CM frame. |
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182 | + models/neutron_hp: |
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183 | o Improved energy and angular distributions for both scattered neutron |
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184 | and recoil targets. Fixed missing inelastic gamma-ray lines. |
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185 | Addresses problem report #1008. |
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186 | o Fixed bug for missed pouch-out particles |
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187 | + models/parton_string: |
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188 | o Revised string fragmentation and tuned parameters in FTF model for Pi+P |
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189 | and pion-nucleon interactions. Implemented quasi-elastic hadron-nucleus |
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190 | scattering in FTF and formation time; tuned string tension. |
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191 | + models/qmd: |
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192 | o Fixed and changed sampling method of impact parameter in G4QMDReaction. |
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193 | o Fixed minor memory leaks. |
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194 | + models/radioactive_decay: |
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195 | o G4NuclearDecayChannel: ARM is no longer applied in photon-evaporation |
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196 | for IT mode and is now applied at the end of DecayIt(); now using the |
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197 | correct shell index in appling ARM and switching on Auger electron |
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198 | production. Checking the residual kinetic energy after ARM and adding |
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199 | it to the atom. |
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200 | + models/rpg: |
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201 | o Fixed energy non-conservation problem in G4RPGFragmentation and in |
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202 | G4RPGReaction. Fixed K0 ID problem in G4RPGInelastic. |
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203 | |
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204 | o Generic Processes: |
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205 | ----------------- |
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206 | + Biasing: |
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207 | o Fixed use of 'WeightCutOff' now correctly working in a mass geometry. |
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208 | o Archived obsolete class G4CellFinder. |
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209 | + Cuts: |
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210 | o Added G4ProductionCutsTableMessenger class. |
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211 | + Decay: |
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212 | o G4DecayWithSpin: modified DecayIt() to allow spin precession also |
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213 | for EM fields. |
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214 | + Scoring: |
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215 | o Added copying of non-ionizing energy deposit in G4Step. |
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216 | |
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217 | o Run: |
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218 | --- |
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219 | + Invoke G4Particle::DeleteAllParticles() in the destructor of |
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220 | G4VUserPhysicsList to clear leaks induced by particles created in |
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221 | the user application. |
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222 | |
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223 | o Tracking & Track: |
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224 | ---------------- |
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225 | + Fix in G4SteppingManager for properly update of 'fTouchableHandle'. |
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226 | Addressing problem report #1009. |
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227 | + Reset non-ionizing energy loss in G4Step::ResetTotalEnergyDeposit() |
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228 | in order to initialize NIEL in each step. |
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229 | |
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230 | o Visualization: |
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231 | ------------- |
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232 | + Fixed remaining gcc-4.3.0 compiler warnings. |
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233 | + OpenGL: |
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234 | o Fixed DBL_MAX problem in 2D drawing. |
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235 | o Improvements in Qt driver and setup. |
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236 | |
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237 | o Examples: |
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238 | -------- |
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239 | + Various fixes, improvements, adoption of new features. |
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240 | + advanced/hadrontherapy: |
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241 | o Reviewed example to update to the new beam line setup. |
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242 | + advanced/microdosimetry: |
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243 | o New application simulating 10 keV tracks Helium+ (positive |
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244 | charge is +e) particle in liquid water using only G4DNA processes. |
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245 | + extended/gdml: |
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246 | o general polishing and new convention for running. |
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247 | |
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248 | |
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249 | ---------------------------------------------------------------------------- |
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250 | |
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251 | Technical Notes |
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252 | --------------- |
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253 | |
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254 | o Official platforms: |
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255 | + Linux, gcc-3.4.6. |
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256 | Tested on 32 bits architectures and 64 bits architectures |
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257 | (Intel or AMD) with the Scientific Linux CERN 4 (SLC4) distribution |
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258 | (based on RedHat Linux Enterprise 4). |
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259 | Versions of Geant4 have also been compiled successfully on other |
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260 | Linux distributions, like Debian, Suse or other RedHat systems. |
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261 | + MacOSX 10.5, gcc-4.0.1 |
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262 | + Windows/XP and CygWin Tools with: Visual C++ 9.0 (Visual Studio 2008) |
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263 | |
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264 | o More verified configurations: |
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265 | + Linux, gcc-4.3.1 |
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266 | + Linux, Intel-icc 10.1 |
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267 | |
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268 | o Geant4 9.2-beta-01 requires the installation of CLHEP-2.0.3.3. |
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269 | |
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270 | Please refer to the Geant4 User Documentation: |
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271 | http://cern.ch/geant4/support/userdocuments.shtml |
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272 | for further information about using Geant4. |
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