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