Gabriele Cosmo
189 lines
8.9 KiB
Plaintext
189 lines
8.9 KiB
Plaintext
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Geant4 9.2 - patch-03 Release Notes
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-----------------------------------
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29 January 2010
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List of fixes included in this public patch since the public release 9.2.p02:
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o Configuration:
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-------------
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+ binmake.gmk: removed extra space characters in definition of TARGOBJEXT,
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fixing issue with target for main() not being rebuilt according to
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dependencies change. Addressing problem report #1098.
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+ Darwin-g++.gmk: added paths to $QTHOME/include and $QTHOME/lib to
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setup for Qt4 configuration.
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+ Added G4OPTDEBUG option for hybrid optimized-debug build also to
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Darwin-g++ and WIN32-g++ configurations.
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o Digits_Hits:
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-----------
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+ Corrected counting of flux and current passing through curved surfaces
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(affecting cylinder and sphere surface scorers).
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+ Added missing virtual keyword for qualification of CheckROVolume()
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and FindROTouchable() methods in G4VReadOutGeometry.
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o Error_propagation:
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-----------------
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+ Corrected usage of G4ThreeVector constructor in class
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G4ErrorMagFieldLimitProces.
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o Event:
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-----
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+ Minor changes to G4GeneralParticleSourceMessenger to now use full range
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of predefined units for length, energy and angle.
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+ Fixed gcc-4.4.0 compilation warning message for non-initialised variable
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in G4SPSEneDistribution.
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o Geometry:
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--------
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+ magnetic_field:
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o Bug fix in G4EqEMFieldWithSpin, following report on Hypernews EM-field
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forum #161. Courtesy of Hiromi Iinuma (KEK).
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+ management:
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o Fixed implementation of G4LogicalVolume::TotalVolumeEntities() to
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become invariant to call sequence.
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o Clear possible excess capacity in node vectors in G4SmartVoxelHeader
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BuildNodes() method. May reduce excess memory allocated in optimisation
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in large detector setups, with slight time increase in initialisation
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for geometry voxelisation.
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o G4VTouchable: moved inline vitual methods, constructor and destructor
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to source, to avoid problem of memory alignment in allocation of
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derived objects.
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+ navigation:
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o Refinements in G4PropagatorInField:
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+ Improved handling of repeated small steps at boundaries which are
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due to geometry imprecision, navigation optimisation, or the details
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of the algorithm used for tracking in field.
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Added new member 'fZeroStepThreshold', to enable tuning of this
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existing threshold for identifying tiny or zero steps.
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A new value for this threshold 'fZeroStepThreshold' is a large
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multiple (10^4) of 'kCarTolerance'. Addresses a problem of tracks
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stuck at boundaries of volumes reported by ATLAS.
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The condition for identifying a tiny step is changed in order to
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avoid misidentifying small proposed physical steps as problem tiny
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steps.
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+ Changed parameters which determine the size of the next trial step.
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This is used only when trying to recover from consecutive tiny/zero
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steps. The default decrease factor is now 0.25 (from 0.1); when the
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step size is comparable to the value of 'fZeroStepThreshold' a
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different decrease factor is used. The value given to the decrease
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factor was changed to 0.35 (from 0.25).
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+ Added new method RefreshIntersectionLocator() to update the state
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of helper class.
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+ Improved printing of diagnostics.
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o G4VIntersectionLocator: fixed problem in ReEstimateEndPoint() for very
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small steps. Corrected constructor to ensure that it initialises all
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data members. Labelled methods in header to make noticable those that
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must change attributes at every step.
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+ solids/CSG:
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o G4Cons: fix to DistanceToIn(p,v), added a check on the direction in
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case of point on surface. Fixes a problem of stuck tracks observed in
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CMS, due to wrong reply from the solid for points on the inner radius
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surface base with direction along the imaginary extension of the cone.
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o G4Torus: fix in SolveNumericJT() in order to take in account the
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difference in the value of theta for different intervals, [0:pi] or
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[-pi:0], and for SPhi in [0:twopi] or [-twopi:0]. Addresses problem
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report #1086.
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o G4Orb: moved debug warning in DistanceToIn(p,v) within G4CSGDEBUG flag.
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+ solids/specific:
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o G4Ellipsoid: refined fix in DistanceToIn(p,v) for points located on the
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curved surface, and correct treatment of geometrical tolerance.
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Addresses problem report #1076.
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o Avoid redundant assignment of value to 3-vector in G4PolyconeSide and
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in G4TwistTubsSide.
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+ volumes:
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o Fix in G4PVParameterised::CheckOverlaps() to not modify daughter volume
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transformation matrix for application to points in the daughter's frame.
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Adopt Inverse() instead of Invert() in call to G4AffineTransform.
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Addresses problem report #1078.
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o Added missing implementation for composing G4AssemblyVolume constructor.
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o Use G4Allocator for dynamic allocation of G4TouchableHistory objects.
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Should reduce the number of direct calls to malloc and memory
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fragmentation. Measured an average improvement of ~5% in CPU speed
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with same memory footprint. Moved inline constructors to source to
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avoid problems of memory alignment in allocation.
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o Global:
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------
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+ Changed date for patch-03 to release 9.2.
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o Standard Electromagnetic Processes:
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----------------------------------
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+ Utils:
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o G4ionEffectiveCharge: added protection to minimal kinetic energy.
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o G4EmCorrections: fixed computation of correction to ion stopping powers.
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o G4VEnergyLossProcess, G4VEmProcess: added protection against negative
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cross section; fixed problem in retrieving physics tables from file.
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o Hadronic Processes:
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------------------
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+ cross_sections:
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o G4CrossSectionDataSetRegistry: more accurate deletion of cross-sections.
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o G4TripathiLightCrossSection: re-enabled low energy check code.
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+ management:
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o G4HadronicProcessStore: added protection to Clean() method.
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+ models/abrasion:
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o Fixed problems of negative sqrt() and made code more robust to
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potential loop problems.
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+ models/CHIPS:
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o Fix in G4QElasticCrossSection for memory corruption caused by wrong
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setting of limit for the tabular initialization in method GetPTables().
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Courtesy of Z.Marshall (ATLAS).
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+ models/coherent_elastic:
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o G4HadronElastic: use static pointer to G4VQCrossSection in order to
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guarantee unique version of CHIPS cross-section class. Removed printout
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in destructor.
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+ models/management:
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o G4HadronicInteractionRegistry: more accurate deletion of models.
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+ stopping:
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o G4PiMinusAbsorptionAtRest and G4KaonMinusAbsorptionAtRest: fixed
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usage of 3vector constructor.
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o Generic Processes:
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-----------------
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+ Cuts:
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o G4VRangeToEnergyConverter: modified implementation of method
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ConvertCutToKineticEnergy() to improve performance.
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Measured a factor 2 to 3 improvement in initialisation speed when
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building physics tables.
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Modified BuildRangeVector() where integration is perfomed in this
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method; extended for e+/e-. Changed 'TotBin' to be constant (i.e. same
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for all converters) and set to 100 (200 for previous versions).
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Added 'MaxEnergyCut' (10 GeV set in default). Added 'fRangeVectorStore'
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to ensure that range-vector is created only once for each material.
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Do not apply converter for neutron, anti-proton, and anti-neutron.
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o A new method ResetConverters() has been added to G4ProductionCutTable.
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This method allows to reduce the memory footprint by clearing temporary
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loss tables and range vectors used at initialization, if invoked when
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starting the first run of a session.
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o Persistency:
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-----------
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+ gdml:
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o Corrected handling of 'quantity' tag; added missing caching of
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evaluation.
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o Examples:
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--------
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+ extended/radioactivedecay/exrdm:
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o Fixed trivial compilation warning when compiled without G4ANALYSIS_USE.
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----------------------------------------------------------------------------
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Technical Notes
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---------------
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o This is a cumulative patch and can be applied on top of release 9.2,
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9.2.p01 or 9.2.p02.
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o Technical notes distributed for release 9.2 are also applicable and
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valid for this patch.
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The code and rebuilt binary libraries for release 9.2 are available
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through our "Download" 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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