| 1 |
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| 2 | Geant4 2.0 Release Notes
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| 3 | ------------------------
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| 4 |
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| 5 | 30th June 2000
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| 6 |
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| 7 | These are the main new features/fixes included in this release (for the
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| 8 | detailed list of fixes/additions, please refer to the related History files):
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| 9 |
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| 10 | o Electromagnetic Processes:
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| 11 | -------------------------
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| 12 | - internal reorganisation of the EnergyLoss classes.
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| 13 | Introduced one level of abstraction through the G4VEnergyLoss class
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| 14 | for muons, electrons and hadrons.
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| 15 | - introduced new functionalities for the energy loss fluctuation model,
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| 16 | and bug fixes.
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| 17 | - removed *Plus* process classes and merged to standard processes:
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| 18 | optimized generation of delta rays near the geometrical boudaries is
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| 19 | now performed as the default.
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| 20 | - bug fixed in the multiple scattering.
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| 21 | - bugs fixed in G4eIonisation and G4hIonisation.
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| 22 | - absolute min gamma energy fixed to 10 keV in G4eBremsstrahlung.
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| 23 | - bugs fixed in G4MuIonisation and G4MuPairProduction.
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| 24 | Updated Physics Reference Manual for muon processes.
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| 25 | - Added new models of Transition Radiation radiators
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| 26 | in processes/parametrisation.
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| 27 |
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| 28 | o Electromagnetic Processes, Low-energy :
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| 29 | -------------------------------------
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| 30 | - fixes in G4LowEnergyBremsstrahlung for continuous energy loss.
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| 31 | - modifications for integration of cross sections, corrections of
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| 32 | fluorescence transition probabilities to take into account
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| 33 | non-radiative transitions.
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| 34 |
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| 35 | o General Processes, Parameterisation, Decay :
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| 36 | ------------------------------------------
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| 37 | - introduced new set of models for X-ray transition radiation
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| 38 | parameterisation.
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| 39 | - implemented full migration to STL for processes/parameterisation
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| 40 | and processes/management modules.
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| 41 | - added process registration into ProcessTable in copy constructor.
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| 42 | - fixed registration of "shortlived" particles for G4Decay.
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| 43 |
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| 44 | o Geometry:
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| 45 | --------
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| 46 | - magneticfield:
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| 47 | o corrected helical steppers.
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| 48 | o fix in G4LineSection to prevent divisions by 0 and sqrt(<0).
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| 49 | o modified method for finding new trial step in G4ChordFinder.
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| 50 | - management:
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| 51 | o design change in G4VSolid for visualization utilities: changed pure
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| 52 | virtual method G4VSolid::GetExtent() to virtual. Added default
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| 53 | implementation based on CalculateExtent().
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| 54 | - BREPS solids:
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| 55 | o Decoupled BREPS module from the STEP Reader;
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| 56 | o Memory leak fixes and some code cleanup.
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| 57 | - CSG and specific solids:
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| 58 | o created new module solids/specific and moved therein all non-CSG
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| 59 | shapes previously placed in solids/CSG.
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| 60 | o Added new shape in solids/specific: G4EllipticalTube.
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| 61 | o Fixed bug in G4PolyhedraSide::Normal(...). This fixes a problem
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| 62 | observed in G4Polyhedra::SurfaceNormal. Fixes in G4Hype.
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| 63 | o Fixed typo in method name in G4Polyhedra.: changed GetNumSIde() to
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| 64 | GetNumSide().
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| 65 | o Added more diagnostics in G4Cons, G4Sphere and G4Torus in function
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| 66 | DistanceToOut(p,v,...).
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| 67 | o Fix in DistanceToIn(p,v) for G4Box and G4Trd to return zero
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| 68 | distance in case computed value is less than 0.5*kCarTolerance.
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| 69 | o Added safety against call from outside in DistanceToOut(p)
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| 70 | o Fix to G4Tubs::DistanceToOut(p,v,...) in computation of xi, yi
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| 71 | for (sphi>=-0.5*kCarTolerance).
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| 72 | o Added more diagnostics in case of invalid enum for DistanceToOut.
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| 73 | o Added new alternative functions SolveBiQuadratic/CubicNew in G4Torus.
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| 74 | - solids/Boolean:
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| 75 | o Implemented CreatePolyhedron method.
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| 76 | o G4DisplacedSolid: reversed implementation of GetFrameRotation and
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| 77 | GetObjectRotation, removing inappropriate invertion.
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| 78 | o G4DisplacedSolid::GetConstituentMovedSolid() made const.
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| 79 | o Fixed bug in G4SubtractionSolid::DistanceToOut(p,v,...).
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| 80 | validNorm flag was uncorrectly set to true.
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| 81 | - STEP:
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| 82 | o Upgraded NIST STEP Reader to SCL (STEP Class Library) 3.2;
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| 83 | o Implemented porting on supported platforms/compilers and
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| 84 | ISO-ANSI C++ compliance.
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| 85 | - STEP Interface module:
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| 86 | o Implemented porting to support the new NIST STEP Reader;
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| 87 | o Reduced inter-class dependencies by reorganising include
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| 88 | statements.
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| 89 | o Improved overall diagnostics and fixed internal memory-leaks;
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| 90 | o Added protections for NULL pointers generated by missing geometry
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| 91 | creators.
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| 92 | o Implemented temporary solution for association of placements
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| 93 | with manifolded solids for advanced BREP shape representations.
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| 94 | - volumes:
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| 95 | o introduced kCarTolerance for check over taken step length and
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| 96 | TruePathLength in G4PropagatorInField::ComputeStep().
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| 97 | o fixes in G4ReplicaNavigation::ComputeStep() for zero-step length
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| 98 | loops observed when point is on boundary.
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| 99 |
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| 100 | o Globals and Config:
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| 101 | ------------------
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| 102 | - Added class G4PhysicsLnVector implementing a physics vector with
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| 103 | natural logarithmic scale for energy/momentum bins.
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| 104 | - Added string identifier to G4UserLimits.
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| 105 | - Defined G4complex type as complex type of doubles.
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| 106 | - Fixes to STLInterface wrappers: fixed initialization of base STL
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| 107 | vector in default constructor of vector collections.
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| 108 | - Changed implementation of G4Integrator to a template class.
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| 109 | - Config: implemented modular setup. Now system specific configurations
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| 110 | are grouped in separated files $G4SYSTEM.gmk and placed in the new
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| 111 | directory config/sys.
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| 112 |
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| 113 | o Graphics Representations:
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| 114 | ------------------------
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| 115 | - Added HepPolyhedron class and re-implemented G4Polyhedron using this
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| 116 | new class (which will become part of CLHEP).
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| 117 | - Added boolean processor for boolean operations of HepPolyhedron
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| 118 | objects.
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| 119 |
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| 120 | o Hadronic Processes:
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| 121 | ------------------
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| 122 | - management: allowing ion interactions in G4HadronInelasticProcess.
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| 123 | - cross_sections: added new classes for ion-ion reactions, and for ion
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| 124 | reactions on Hydrogen.
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| 125 | - processes: added new process for ion induced reactions.
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| 126 | - models/isotope_production: added model for proton induced isotope
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| 127 | production, validity range is the proton spallation energy range
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| 128 | (to use this, an update of the G4NDL library is required).
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| 129 | - models/neutron_hp: enabled production of residual nuclei for some
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| 130 | inelastic final states.
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| 131 | - models/generator/de_excitation: design iteration to allow re-use of
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| 132 | root-finding algorithms.
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| 133 | - models/generator/quark_gluon_string: added gamma annihilation
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| 134 | cross-sections and anti-nucleaon-nucleon annihilation. Bug fixes
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| 135 | in AntiSigma SU(12) wafe-function. Extended G4SPBaryon.
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| 136 | - models/generator/string_fragmentation: extended
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| 137 | G4VLongitudinalStringDecay to allow string excitation dependent
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| 138 | parameters.
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| 139 | - models/generator/util: bug fixes and added functionality in
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| 140 | G4KineticTrack.
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| 141 | - models/radiative_decay: added model for simulating the decay of
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| 142 | radio-active nuclei and isomeric states. Validity range is the
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| 143 | range of materials available from ENSDF as of May 2000. To use
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| 144 | this model a data set is provided in geant4/data/RadiativeDecay
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| 145 | and the environment variable G4RADIOACTIVEDATA must be set.
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| 146 | - fixes for memory leaks observed at event loop.
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| 147 |
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| 148 | NOTE: the consistent data sets for photon evaporation and radio-active
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| 149 | decay (derived from the same version of the ENSDF data) are
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| 150 | provided from Web in the source download area. A previous version
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| 151 | of photon evaporation data is also provided.
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| 152 |
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| 153 | o Interfaces:
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| 154 | ----------
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| 155 | - Introduced new G4UITerminal (G4UItcsh) with UNIX-like shell
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| 156 | (currently fully tested only on Linux-g++ and SUN-CC systems).
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| 157 |
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| 158 | o Particles:
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| 159 | ---------
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| 160 | - Full migration to STL performed.
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| 161 | - Removed G4RhoPlus, G4RhoZero, and G4RhoMinus classes.
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| 162 | Added "rho0" in G4ShortLivedConstructor.
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| 163 | - Fixes in G4IsotopeTable and G4NucleiProperties classes.
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| 164 | - Introduced ParticleSubType property in ParticleDefinition.
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| 165 | - Added GetAtomicNumber() and GetAtomicMass() methods to G4VIon,
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| 166 | G4Proton, and G4Neutron.
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| 167 | - Added G4VDecayChannel::GetAngularMomentum() method.
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| 168 |
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| 169 | o Tracking & Track:
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| 170 | ----------------
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| 171 | - Added thePolarizationChange in G4ParticleChangeForTransportation.
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| 172 | - Added cashing mechanism of pointer to material in G4StepPoint.
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| 173 | to extract material information from parametrized volumes.
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| 174 | - GetTouchable/SetTouchable methods have been changed to handle
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| 175 | "const" pointers.
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| 176 | - Introduced G4VUserTrackInformation class and associated to G4Track.
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| 177 | - Fixed problem in deleting touchable in G4SteppingManager.
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| 178 |
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| 179 | o Visualization:
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| 180 | -------------
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| 181 | - Introduced first implementation of the G4RayTracer. With G4RayTracer
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| 182 | all solids types supported in Geant4 can be visualised.
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| 183 | - Added commands /vis/viewer/update, /vis/viewer/reset.
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| 184 | - Added "compound" commands: /vis/open, /vis/drawVolume.
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| 185 | - Added ability to visualise boolean solids through G4Polyhedron objects.
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| 186 | - Added G4LogicalVolumeModel::DescribeSolid(), which explicitly adds
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| 187 | components of composite solids as white forced-wireframe objects.
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| 188 | - OPACS:
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| 189 | o G4GoSceneHandler: correct polyhedron wire-frame in order to remove
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| 190 | some edges.
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| 191 | o G4WoViewer: changed camera name checking so that a viewer created
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| 192 | by the GUI (Wo) could be hooked.
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| 193 | o G4GoSceneHandler: changed circle rendering.
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| 194 | - Bug fix in G4PhysicalVolumeModel for replicas.
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| 195 |
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| 196 |
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| 197 | Notes:
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| 198 |
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| 199 | o Geant4 2.0 is based on STL and can be installed with strict
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| 200 | ISO/ANSI C++ compliant setup or not. See notes below.
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| 201 |
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| 202 | The code and some binary libraries are available through our "Source
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| 203 | Code" Web page:
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| 204 | - see our Geant4 Home Page (http://cern.ch/geant4).
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| 205 |
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| 206 | Please refer to the Geant4 User Documentation
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| 207 | (http://cern.ch/geant4/G4UsersDocuments/Overview/html)
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| 208 | for further information about using Geant4.
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| 209 | Updates to the documentation for Geant4 2.0 are expected to be published as
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| 210 | usual within three weeks from the release date.
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| 211 |
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| 212 |
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| 213 | Contents
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| 214 | --------
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| 215 |
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| 216 | 1. Supported and Tested Platforms
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| 217 | 2. LHC++ and CLHEP 1.5
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| 218 | 3. The Standard Template Library (STL)
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| 219 | 4. Persistency
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| 220 | 5. Compiler Specific Problems
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| 221 | 6. Known Run-Time Problems
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| 222 | 7. Compilation Warnings
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| 223 | 8. Known Run-Time Warnings
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| 224 |
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| 225 |
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| 226 | 1. Supported and Tested Platforms
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| 227 | ---------------------------------
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| 228 |
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| 229 | o SUN Solaris 5.6, C++ 4.2 patch 104631-04.
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| 230 | o HP 10.20, aCC C++ B3910B A.01.23
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| 231 | o Linux 2.2.12-20, gcc C++ egcs-2.91.66 (egcs 1.1.2).
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| 232 | This configuration was tested with the RedHat 6.1 distribution, but
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| 233 | versions of Geant4 have also been compiled successfully on Debian
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| 234 | and Suse distributions.
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| 235 |
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| 236 | Platforms also tested but giving rise to some problems - see below:
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| 237 |
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| 238 | o DEC V4.0, cxx C++ V6.1-027.
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| 239 | o SUN Solaris 5.6, C++ 5.0 patches 107357-07, 107311-09.
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| 240 |
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| 241 | Platforms configured but not yet tested (a patch will follow, if needed):
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| 242 |
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| 243 | o NT 4.0 with Service Pack 4 and Cygnus Tools b20 with:
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| 244 | Visual C++ 6.0 Service Pack 2
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| 245 |
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| 246 | Platforms configured but not tested and not supported:
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| 247 | o SGI V6.5.5, CC 7.2.1 with ObjectSpace
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| 248 | o AIX 4.3.2, xlC compiler with ObjectSpace
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| 249 |
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| 250 |
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| 251 | 2. LHC++ and CLHEP 1.5
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| 252 | ----------------------
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| 253 |
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| 254 | Geant4 2.0 requires the installation of CLHEP 1.5.
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| 255 |
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| 256 | See CLHEP 1.5 (http://cern.ch/clhep/INSTALLATION/clhep.html).
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| 257 |
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| 258 | By default, the CLHEP installation scripts will activate ISO/ANSI C++ features
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| 259 | if the compiler is capable. You need to explicitly disable CLHEP settings in
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| 260 | case you wish non-ISO/ANSI setup on those compilers (for example, DEC).
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| 261 | Note that the installation of the "Hist" package in CLHEP for histogramming
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| 262 | is now disabled by default. If you wish to install CLHEP with the "Hist"
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| 263 | package, you need to edit the CLHEP installation scripts and add the
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| 264 | corresponding entry.
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| 265 |
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| 266 | Geant4 2.0 coworks with LHC++ 2.0.0 and components included therein:
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| 267 | Objectivity 5.2.1
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| 268 | ObjectSpace 2.1
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| 269 | HepODBMS 0.3.1.3
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| 270 | CLHEP 1.5.0.0
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| 271 |
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| 272 | 3. The Standard Template Library
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| 273 | --------------------------------
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| 274 |
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| 275 | The following versions of STL have been tested:
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| 276 |
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| 277 | ObjectSpace STL on
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| 278 | DEC, HP and SUN.
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| 279 |
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| 280 | See ObjectSpace (http://www.objectspace.com).
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| 281 |
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| 282 | "Native" STL on: Linux, HP, DEC and SUN.
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| 283 |
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| 284 | This is selected at installation/compile time by the environment variable
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| 285 | G4USE_OSPACE in the case of the former - see documentation.
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| 286 |
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| 287 | NOTES:
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| 288 | - Be aware that by default, the installation scripts will expect to use
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| 289 | the native STL implementation. You must set the G4USE_OSPACE variable
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| 290 | in the environment in order to select the ObjectSpace implementation.
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| 291 |
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| 292 | - Platform specific setup:
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| 293 | o DEC: ObjectSpace is required in non ISO/ANSI setup.
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| 294 | Native STL is required for ISO/ANSI setup.
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| 295 | o HP: either ObjectSpace or native STL can be used (non ISO/ANSI setup).
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| 296 | o SUN: ObjectSpace is required in non ISO/ANSI setup (CC 4.2).
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| 297 | Native STL is required for ISO/ANSI setup (CC 5.0 only).
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| 298 | o Linux: native STL is required (non ISO/ANSI setup).
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| 299 | o NT: Native STL and ISO/ANSI setup required.
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| 300 |
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| 301 | In the interest of stability, a significant part of the code in Geant4 2.0
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| 302 | still makes use of the "STL Interface" wrapper classes, used for allowing the
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| 303 | migration from Rogue Wave Tools.h++ container library. For these the emphasis
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| 304 | has remained on correct behaviour, rather than performance.
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| 305 |
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| 306 |
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| 307 | 4. Persistency
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| 308 | --------------
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| 309 |
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| 310 | - Platforms
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| 311 |
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| 312 | Persistency in Geant4 2.0 release has been tested on the following
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| 313 | platforms/software versions:
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| 314 |
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| 315 | G4SYSTEM OS C++ compiler HepODBMS Objectivity
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| 316 | --------- ----------- ------------ --------- -----------
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| 317 | SUN-CC SunOS 5.6 CC 4.2 0.3.1.4 5.2.1
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| 318 | Linux-g++ Linux RH6.1 egcs 1.1.2 0.3.1.1 5.2.1
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| 319 |
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| 320 | - Known Problems
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| 321 |
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| 322 | There are many warning messages on some platforms during the
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| 323 | installation of the libraries and the compilation of the examples.
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| 324 | Most of them can be safely ignored. It is annoying but hard to get
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| 325 | rid of them due to various reasons.
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| 326 |
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| 327 | For the detail of the warning messages, please refer to the release
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| 328 | note of Geant4 1.0.
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| 329 |
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| 330 |
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| 331 | 5. Compiler Specific Problems
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| 332 | -----------------------------
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| 333 |
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| 334 | o DEC V4.0, cxx C++ V6.1-027.
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| 335 |
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| 336 | - We have found cases of mis-compilation of min and max templates
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| 337 | on DEC. We have traced those which cause serious malfunction
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| 338 | but there is no guarantee that there are no other cases.
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| 339 | Detailed inspection of assembler output suggests that this
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| 340 | problem might not be confined to min and max. This has been
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| 341 | reported to DEC/Compaq. We understand a new version 6.2 of the
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| 342 | compiler is now available. However we cannot guarantee correct
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| 343 | execution of Geant4 on DEC with the current version of the
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| 344 | compiler.
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| 345 | - A bug in cin.getline() system function causes an anomalous
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| 346 | behavior when running in interactive-mode on DEC-cxx 6.1 in
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| 347 | ISO/ANSI mode. We tested the bug has been fixed in more recent
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| 348 | versions of the compiler.
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| 349 |
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| 350 | o SUN Solaris 5.6, C++ 5.0 patches 107357-07, 107311-09.
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| 351 |
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| 352 | Due to a compiler bug, some code in Geant4 cannot be compiled in
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| 353 | optimised mode, patches are available from SUN (107357-09, 107311-10)
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| 354 | which are claimed to fix this problem, we have not been able to test
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| 355 | them yet. Tests have been performed only by using the debuggable
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| 356 | version of the libraries.
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| 357 |
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| 358 |
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| 359 | 6. Known Run-Time Problems and Limitations
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| 360 | ------------------------------------------
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| 361 |
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| 362 | - In the "high energy" hadronic model, a problem of energy non conservation
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| 363 | has been observed. A fix for it is currently under test and will be
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| 364 | available soon in a public patch.
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| 365 | - In multiple scattering, the nuclear size correction maybe not well adapted
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| 366 | for electrons. A fix will come soon.
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| 367 | - The parametrisation of the total cross section for electron bremsstrahlung
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| 368 | will be reviewed in order to allow generation of gamma below 10 keV.
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| 369 |
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| 370 |
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| 371 | 7. Compilation Warnings
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| 372 | -----------------------
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| 373 |
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| 374 | There are compilation warnings on some platforms. We do not believe
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| 375 | that any will lead to incorrect run-time behaviour, but we are working
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| 376 | on reducing them.
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| 377 |
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| 378 |
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| 379 | 8. Known Run-Time Warnings
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| 380 | --------------------------
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| 381 |
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| 382 | The following messages can be written to error output while tracking. We
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| 383 | believe none give rise to incorrect behaviour.
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| 384 |
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| 385 | o G4PropagateInField: Warning: Particle is looping
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| 386 | - tracking in field will be stopped.
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| 387 | It has performed 10000 steps in Field while a maximum of 10000
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| 388 | are allowed.
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