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| 2 | Geant4 9.2 - patch-03 Release Notes
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| 3 | -----------------------------------
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| 4 |
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| 5 | 29 January 2010
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| 6 |
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| 7 | List of fixes included in this public patch since the public release 9.2.p02:
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| 8 |
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| 9 | o Configuration:
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| 10 | -------------
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| 11 | + binmake.gmk: removed extra space characters in definition of TARGOBJEXT,
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| 12 | fixing issue with target for main() not being rebuilt according to
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| 13 | dependencies change. Addressing problem report #1098.
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| 14 | + Darwin-g++.gmk: added paths to $QTHOME/include and $QTHOME/lib to
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| 15 | setup for Qt4 configuration.
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| 16 | + Added G4OPTDEBUG option for hybrid optimized-debug build also to
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| 17 | Darwin-g++ and WIN32-g++ configurations.
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| 18 |
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| 19 | o Digits_Hits:
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| 20 | -----------
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| 21 | + Corrected counting of flux and current passing through curved surfaces
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| 22 | (affecting cylinder and sphere surface scorers).
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| 23 | + Added missing virtual keyword for qualification of CheckROVolume()
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| 24 | and FindROTouchable() methods in G4VReadOutGeometry.
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| 25 |
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| 26 | o Error_propagation:
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| 27 | -----------------
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| 28 | + Corrected usage of G4ThreeVector constructor in class
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| 29 | G4ErrorMagFieldLimitProces.
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| 30 |
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| 31 | o Event:
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| 32 | -----
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| 33 | + Minor changes to G4GeneralParticleSourceMessenger to now use full range
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| 34 | of predefined units for length, energy and angle.
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| 35 | + Fixed gcc-4.4.0 compilation warning message for non-initialised variable
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| 36 | in G4SPSEneDistribution.
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| 37 |
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| 38 | o Geometry:
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| 39 | --------
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| 40 | + magnetic_field:
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| 41 | o Bug fix in G4EqEMFieldWithSpin, following report on Hypernews EM-field
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| 42 | forum #161. Courtesy of Hiromi Iinuma (KEK).
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| 43 | + management:
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| 44 | o Fixed implementation of G4LogicalVolume::TotalVolumeEntities() to
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| 45 | become invariant to call sequence.
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| 46 | o Clear possible excess capacity in node vectors in G4SmartVoxelHeader
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| 47 | BuildNodes() method. May reduce excess memory allocated in optimisation
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| 48 | in large detector setups, with slight time increase in initialisation
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| 49 | for geometry voxelisation.
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| 50 | o G4VTouchable: moved inline vitual methods, constructor and destructor
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| 51 | to source, to avoid problem of memory alignment in allocation of
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| 52 | derived objects.
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| 53 | + navigation:
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| 54 | o Refinements in G4PropagatorInField:
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| 55 | + Improved handling of repeated small steps at boundaries which are
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| 56 | due to geometry imprecision, navigation optimisation, or the details
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| 57 | of the algorithm used for tracking in field.
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| 58 | Added new member 'fZeroStepThreshold', to enable tuning of this
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| 59 | existing threshold for identifying tiny or zero steps.
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| 60 | A new value for this threshold 'fZeroStepThreshold' is a large
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| 61 | multiple (10^4) of 'kCarTolerance'. Addresses a problem of tracks
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| 62 | stuck at boundaries of volumes reported by ATLAS.
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| 63 | The condition for identifying a tiny step is changed in order to
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| 64 | avoid misidentifying small proposed physical steps as problem tiny
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| 65 | steps.
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| 66 | + Changed parameters which determine the size of the next trial step.
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| 67 | This is used only when trying to recover from consecutive tiny/zero
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| 68 | steps. The default decrease factor is now 0.25 (from 0.1); when the
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| 69 | step size is comparable to the value of 'fZeroStepThreshold' a
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| 70 | different decrease factor is used. The value given to the decrease
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| 71 | factor was changed to 0.35 (from 0.25).
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| 72 | + Added new method RefreshIntersectionLocator() to update the state
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| 73 | of helper class.
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| 74 | + Improved printing of diagnostics.
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| 75 | o G4VIntersectionLocator: fixed problem in ReEstimateEndPoint() for very
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| 76 | small steps. Corrected constructor to ensure that it initialises all
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| 77 | data members. Labelled methods in header to make noticable those that
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| 78 | must change attributes at every step.
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| 79 | + solids/CSG:
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| 80 | o G4Cons: fix to DistanceToIn(p,v), added a check on the direction in
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| 81 | case of point on surface. Fixes a problem of stuck tracks observed in
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| 82 | CMS, due to wrong reply from the solid for points on the inner radius
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| 83 | surface base with direction along the imaginary extension of the cone.
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| 84 | o G4Torus: fix in SolveNumericJT() in order to take in account the
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| 85 | difference in the value of theta for different intervals, [0:pi] or
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| 86 | [-pi:0], and for SPhi in [0:twopi] or [-twopi:0]. Addresses problem
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| 87 | report #1086.
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| 88 | o G4Orb: moved debug warning in DistanceToIn(p,v) within G4CSGDEBUG flag.
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| 89 | + solids/specific:
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| 90 | o G4Ellipsoid: refined fix in DistanceToIn(p,v) for points located on the
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| 91 | curved surface, and correct treatment of geometrical tolerance.
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| 92 | Addresses problem report #1076.
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| 93 | o Avoid redundant assignment of value to 3-vector in G4PolyconeSide and
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| 94 | in G4TwistTubsSide.
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| 95 | + volumes:
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| 96 | o Fix in G4PVParameterised::CheckOverlaps() to not modify daughter volume
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| 97 | transformation matrix for application to points in the daughter's frame.
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| 98 | Adopt Inverse() instead of Invert() in call to G4AffineTransform.
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| 99 | Addresses problem report #1078.
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| 100 | o Added missing implementation for composing G4AssemblyVolume constructor.
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| 101 | o Use G4Allocator for dynamic allocation of G4TouchableHistory objects.
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| 102 | Should reduce the number of direct calls to malloc and memory
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| 103 | fragmentation. Measured an average improvement of ~5% in CPU speed
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| 104 | with same memory footprint. Moved inline constructors to source to
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| 105 | avoid problems of memory alignment in allocation.
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| 106 |
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| 107 | o Global:
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| 108 | ------
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| 109 | + Changed date for patch-03 to release 9.2.
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| 110 |
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| 111 | o Standard Electromagnetic Processes:
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| 112 | ----------------------------------
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| 113 | + Utils:
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| 114 | o G4ionEffectiveCharge: added protection to minimal kinetic energy.
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| 115 | o G4EmCorrections: fixed computation of correction to ion stopping powers.
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| 116 | o G4VEnergyLossProcess, G4VEmProcess: added protection against negative
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| 117 | cross section; fixed problem in retrieving physics tables from file.
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| 118 |
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| 119 | o Hadronic Processes:
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| 120 | ------------------
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| 121 | + cross_sections:
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| 122 | o G4CrossSectionDataSetRegistry: more accurate deletion of cross-sections.
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| 123 | o G4TripathiLightCrossSection: re-enabled low energy check code.
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| 124 | + management:
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| 125 | o G4HadronicProcessStore: added protection to Clean() method.
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| 126 | + models/abrasion:
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| 127 | o Fixed problems of negative sqrt() and made code more robust to
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| 128 | potential loop problems.
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| 129 | + models/CHIPS:
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| 130 | o Fix in G4QElasticCrossSection for memory corruption caused by wrong
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| 131 | setting of limit for the tabular initialization in method GetPTables().
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| 132 | Courtesy of Z.Marshall (ATLAS).
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| 133 | + models/coherent_elastic:
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| 134 | o G4HadronElastic: use static pointer to G4VQCrossSection in order to
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| 135 | guarantee unique version of CHIPS cross-section class. Removed printout
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| 136 | in destructor.
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| 137 | + models/management:
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| 138 | o G4HadronicInteractionRegistry: more accurate deletion of models.
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| 139 | + stopping:
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| 140 | o G4PiMinusAbsorptionAtRest and G4KaonMinusAbsorptionAtRest: fixed
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| 141 | usage of 3vector constructor.
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| 142 |
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| 143 | o Generic Processes:
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| 144 | -----------------
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| 145 | + Cuts:
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| 146 | o G4VRangeToEnergyConverter: modified implementation of method
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| 147 | ConvertCutToKineticEnergy() to improve performance.
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| 148 | Measured a factor 2 to 3 improvement in initialisation speed when
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| 149 | building physics tables.
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| 150 | Modified BuildRangeVector() where integration is perfomed in this
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| 151 | method; extended for e+/e-. Changed 'TotBin' to be constant (i.e. same
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| 152 | for all converters) and set to 100 (200 for previous versions).
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| 153 | Added 'MaxEnergyCut' (10 GeV set in default). Added 'fRangeVectorStore'
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| 154 | to ensure that range-vector is created only once for each material.
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| 155 | Do not apply converter for neutron, anti-proton, and anti-neutron.
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| 156 | o A new method ResetConverters() has been added to G4ProductionCutTable.
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| 157 | This method allows to reduce the memory footprint by clearing temporary
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| 158 | loss tables and range vectors used at initialization, if invoked when
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| 159 | starting the first run of a session.
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| 160 |
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| 161 | o Persistency:
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| 162 | -----------
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| 163 | + gdml:
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| 164 | o Corrected handling of 'quantity' tag; added missing caching of
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| 165 | evaluation.
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| 166 |
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| 167 | o Examples:
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| 168 | --------
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| 169 | + extended/radioactivedecay/exrdm:
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| 170 | o Fixed trivial compilation warning when compiled without G4ANALYSIS_USE.
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| 171 |
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| 172 | ----------------------------------------------------------------------------
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| 173 |
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| 174 | Technical Notes
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| 175 | ---------------
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| 176 |
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| 177 | o This is a cumulative patch and can be applied on top of release 9.2,
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| 178 | 9.2.p01 or 9.2.p02.
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| 179 | o Technical notes distributed for release 9.2 are also applicable and
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| 180 | valid for this patch.
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| 181 |
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| 182 | The code and rebuilt binary libraries for release 9.2 are available
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| 183 | through our "Download" Web page:
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| 184 | http://cern.ch/geant4/support/download.shtml
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| 185 |
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| 186 | Please refer to the Geant4 User Documentation:
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| 187 | http://cern.ch/geant4/support/userdocuments.shtml
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| 188 | for further information about using Geant4.
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