[1337] | 1 | |
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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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