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| Geant4 8.2 - patch-01 Release Notes | ||
| ----------------------------------- | ||
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| 23 February 2007 | ||
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| List of fixes included in this public patch since the public release 8.2: | ||
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| o Geometry: | ||
| -------- | ||
| + management: | ||
| o Added flag to G4VPhysicalVolume::CheckOverlaps() method for | ||
| controlling verbosity. By default, verbosity is ON. | ||
| + navigation: | ||
| o In G4Navigator, forcing call to CheckOverlaps() on the current | ||
| volume before event abortion for cases of stuck tracks. | ||
| o G4PropagatorInField: implemented ClearPropagatorState() | ||
| to clear track-dependent state (safety, zero-steps, loop flag. etc...). | ||
| Call to this method becomes mandatory in G4Transportation for each new | ||
| track to overcome side effects of safety inconsistency in presence of | ||
| geometry overlaps. | ||
| + solids/specific: | ||
| o Do not scale reducible-polygon in G4Polyhedra::Reset() method. | ||
| The 'original_parameters' structure offered as input through the | ||
| accessors are always assumed to be already scaled by the | ||
| 'cos(0.5*phiTotal/theNumSide)' factor. | ||
| Addresses problem report #873. | ||
| o Fix in G4PolyconeSide::DistanceAway() for correct estimation of | ||
| distance for the case of Phi sections. | ||
| Addresses problem report #598. | ||
| + volumes: | ||
| o Added flag for controlling verbosity to CheckOverlaps() method for | ||
| G4PVPlacement and G4PVParameterised. By default, verbosity is ON. | ||
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| o Global: | ||
| ------ | ||
| + Changed date for patch-01 to release 8.2. | ||
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| o Electromagnetic processes: | ||
| ------------------------- | ||
| + standard: | ||
| o G4UrbanMscModel: | ||
| - Fix in the single scattering code for heavy particles, now the code | ||
| can be used with skin=1 e+/e- and for heavy particles as well. | ||
| - Removed unecessary call to G4Navigator location method. | ||
| - Added protection inside lateral displacement sampling against cases | ||
| of TrueStepLength < GeomStepLength. | ||
| - Added protections against NaN values in two places: sampling of | ||
| theta when tau=0 in lateral displacement, and in method | ||
| ComputeTrueStepLength() for the case of zero true length. | ||
| o G4MultipleScattering: fix to allow for reinitialisation of model | ||
| parameters between runs. | ||
| o Use SetEmModel(index) and added SetFluctModel() from | ||
| G4VEnergyLossProcess in eIonisation, hIonisation, ionIonisation, | ||
| eBremstrahlung. | ||
| + utils: | ||
| o Fixed a problem happening in interactive sessions when activating or | ||
| deactivating processes; the problem resulting in building wrong dEdx | ||
| tables for e+- and muons. Modified classes are: G4LossTableBuilder, | ||
| G4LossTableManager and G4VEmEnergyLossProcess. | ||
| New tables are added for e+- and muons ionisation additionally to | ||
| total energy loss tables. | ||
|
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| o Hadronic Processes: | ||
| ------------------ | ||
| + models/binary_cascade: | ||
| o G4BinaryCascade::Capture(): added protection against division by zero. | ||
| + models/chiral_inv_phase_space: | ||
| o Fixed cases of division by 0 in G4Quasmon and G4QNucleus. | ||
| and other cases of generation of NaN. | ||
| Reduces segmentation faults in CHIPS-based models and physics lists | ||
| such as QGSC. | ||
| o Fixed bug of generation of NaN in G4QElastic observed in complicated | ||
| event for the multi-projectile case. | ||
| Reduces segmentation faults in elastic scattering. | ||
| + models/de_excitation: | ||
| o Evaporation: added protection to exclude negative probabilities from | ||
| the "competitive channel sum". Together with the fix below for fission | ||
| this should only happen due to a precision error, but is protected | ||
| nonetheless. | ||
| o Fission: fixed probability to no longer be negative. Is now equivalent | ||
| to what is written in the Physics Reference Manual. | ||
| The above two fixes also affect the precompound model which invokes | ||
| these models. | ||
| o Fission: fixed several memory leaks in G4ParaFissionModel. | ||
| + models/low_energy: | ||
| o G4LElastic: added protection against sqrt() of negative value. | ||
| + models/management: | ||
| o For error reporting, added model name arguments and default names to | ||
| constructors for classes G4HadronicInteraction, G4InelasticInteraction, | ||
| G4VIntraNuclearTransportModel and G4VPreCompoundModel. | ||
| + models/neutron_hp: | ||
| o Fixed potential divisions by zero in: G4NeutronHPVector, | ||
| G4NeutronHPLevel and G4NeutronHPInterpolator. | ||
| + models/parton_string/hadronization: | ||
| o G4ExcitedStringDecay::EnergyAndMomentumCorrector(): fixed bug which | ||
| did stop correction even if not yet converged; check on convergence | ||
| must check that scale-1 is close to 0, and not less than 0. | ||
| + models/parton_string/management: | ||
| o Debugged method Dump() added in G4InteractionContent to print object. | ||
| o Debugged output in G4VPartonStringModel checking E-p conservation of | ||
| string model. | ||
| The above two points provide improved, more detailed verbose output. | ||
| + models/parton_string/qgsm: | ||
| o Corrected E-p non-conservation in QGS. In G4QGSMSplitableHadron, | ||
| the smaller of the lightcone momenta Q+/Q- was ignored. | ||
| o Fixed division by 0 in G4QGSMSplitableHadron::SampleX(). | ||
| o Added debugging output to several classes. | ||
| + models/util: | ||
| o Added method to G4Parton for setting momentum using both + and - | ||
| momentum component. Should help in improving shower shapes. | ||
| o G4Fragment: more info on warning output of negative excitation energy. | ||
| + processes: | ||
| o Added process names to G4HadronElasticProcess, G4HadronCaptureProcess, | ||
| G4HadronFissionProcess. This will allow more detailed error reporting. | ||
| o Cleaned up commented-out code. | ||
| + stopping: | ||
| o G4MuMinusCaptureCascade: added sampling of random vector of e- in | ||
| decay; added factor 2 in potential energy - fixing decay spectrum. | ||
| o G4MuonMinusCaptureAtRest: fixed problem for the case when isotope | ||
| vector is undefined. Force to use round 'targetA'. | ||
| Addressing problem report #926. | ||
| + util: | ||
| o G4HadFinalState: corrected initialisation of energy deposition. | ||
| Fix affects elastically scattered neutrons and probably most | ||
| hadronic models. Reduces the number of events in which the summed | ||
| energy of final particles exceeds that of the incident particle. | ||
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| o Materials: | ||
| --------- | ||
| + G4Material: fill fAtomVector in the case when material is built | ||
| from element mass fractions, allowing for low-energy package to | ||
| use NIST G4_WATER. | ||
| + G4NistMaterialBuilder: added liquids O2 and N2. | ||
| + G4NistElementBuilder: added protection for Z<=101. | ||
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| o Physics Lists: | ||
| ------------- | ||
| + Fix in QGSP_BIC_HP list: activated use of HP elastic. | ||
| + G4HadronElasticPhysics: set limits on low energy and QElastic to zero. | ||
| + Fixed special cuts for LBE physics list. | ||
| + Added set min/max Energy and Inelastic Energy to NeutronHP builder. | ||
| + G4EmStandardPhysics: use G4hMultipleScattering for muons and removed | ||
| extra printouts. Use default multiple-scattering setup in | ||
| G4EmStandardPhysics72. | ||
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| o Run: | ||
| --- | ||
| + Fix in method G4RunManager::NumberOfEventToBeStored(). | ||
| Addressing problem report #925. | ||
| + Added protection against missing particle types before | ||
| BuildPhysicsTable() is invoked. Addressing problem report #923. | ||
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| o Transportation: | ||
| -------------- | ||
| + G4Transportation: calling PropagatorInField to clear state for new | ||
| track. This addresses a reliabilitiy problem observed by ATLAS; the | ||
| fix is related to overlaps in the geometry, and consists in clearing | ||
| the safety value, which may become multivalued due to overlaps in the | ||
| geometry, and thus can become invalid for a new track in an overlap | ||
| region... | ||
| + Added protection against zero 'velocity' in method | ||
| G4Transportation::AlongStep(). | ||
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| o Configuration: | ||
| ------------- | ||
| + Updated Configure script to prompt for new version of G4EMLOW data set. | ||
|
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| o Data Sets: | ||
| --------- | ||
| + New data set G4EMLOW4.2: correction to Auger data. | ||
|
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| o Examples: | ||
| -------- | ||
| + Updated reference outputs. | ||
| + advanced/underground_physics | ||
| o Removed uninitialized 'UserLimitsForXenon'. | ||
| + extended/extended/TestEm7 | ||
| o Cleanup of macros. | ||
| + extended/electromagnetic/TestEm16 | ||
| o Added HistoManager and HistoMessenger and commands to modify | ||
| upper step limit. Minor fix to GNUmakefile. | ||
| + extended/radioactivedecay/exrdm | ||
| o Fixed usage of physics-lists and histograms | ||
| + extended/runAndEvent/RE02 | ||
| o Fixed missing NULL pointer protection in ComputeMaterial() method. | ||
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| ---------------------------------------------------------------------------- | ||
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| Technical Notes | ||
| --------------- | ||
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| o This patch should be applied on top of release 8.2 | ||
| o Technical notes distributed for release 8.2 are also applicable and | ||
| valid for this patch. | ||
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| The code and rebuilt binary libraries for release 8.2 are available | ||
| through our "Source Code" Web page: | ||
| http://cern.ch/geant4/support/download.shtml | ||
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| Please refer to the Geant4 User Documentation: | ||
| http://cern.ch/geant4/support/userdocuments.shtml | ||
| for further information about using Geant4. |
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