| [1337] | 1 |
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| 2 | Geant4 9.2-beta-01 Release Notes
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| 3 | --------------------------------
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| 4 |
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| 5 | 4 July 2008
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| 6 |
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| 7 | List of main features and fixes included in this Beta release since 9.1.p02:
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| 8 |
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| 9 | o Configuration:
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| 10 | -------------
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| 11 | + Integrated improvements to Qt setup.
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| 12 | + Embedded AIDA setup in central configuration scripts, simplified
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| 13 | GNUmakefiles in examples.
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| 14 |
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| 15 | o Environments:
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| 16 | ------------
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| 17 | + Updated G4Py configure scripts and fixed some minor bugs.
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| 18 |
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| 19 | o Event
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| 20 | -----
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| 21 | + Fixed problem of out of bounds array access in G4SPSEneDistribution.
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| 22 | Added accessors to G4SPSAngDistribution, addressing problem report #1013.
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| 23 |
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| 24 | o Geometry:
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| 25 | --------
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| 26 | + management:
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| 27 | o G4Region: changed condition inside ScanVolumeTree() to check for the
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| 28 | existence of a valid material-scanner pointer to apply the material
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| 29 | scan instead of using the flag for nested structures.
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| 30 | o G4GeometryManager: do not apply optimisation on the current volume
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| 31 | if it has been defined as a regular structure.
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| 32 | o Addresses problem report #990.
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| 33 | + solids/CSG:
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| 34 | o G4Tubs: fix in DistanceToIn(p,v, ...) in case of point on surface with
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| 35 | very small tangent direction; now returning kInfinity and no longer zero.
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| 36 | It fixes observed cases of zero value returned by both DistanceToIn()
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| 37 | and DistanceToOut(), causing stuck tracks with zero step length.
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| 38 | o G4Sphere: fixed calculation of roots in DistanceToOut(p,v,...) for
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| 39 | theta-conical surfaces interserctions and for sTheta<=90 degree
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| 40 | intersection. Addresses issue reported when running PET application
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| 41 | with optical photons about mis-computation of distance on half-sphere
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| 42 | constructs.
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| 43 | + solids/specific:
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| 44 | o Enhanced GetPointOnSurface() for generic G4Polycone and G4Polyhedra
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| 45 | constructs.
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| 46 |
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| 47 | o Global:
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| 48 | ------
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| 49 | + G4UnitsTable: added units for electric-field, V/m.
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| 50 | + G4PhysicsVector: introduced cubic spline interpolation, optionally
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| 51 | selectable. Optimised implementation of GetValue() method.
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| 52 | + G4LPhysicsFreeVector: corrected use of GetValue() to adopt
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| 53 | implementation available from the base class.
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| 54 | + Modified G4RandomDirection global function to use unit radius sphere
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| 55 | surface algorithm instead of 8-quadrants technique, giving ~30%
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| 56 | performance boost in dedicated stress tests.
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| 57 | + Changed date for 9.2-beta release.
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| 58 |
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| 59 | o Intercoms
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| 60 | ---------
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| 61 | + Added a new function in G4UIcommandTree to find a subtree.
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| 62 |
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| 63 | o Interfaces
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| 64 | ----------
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| 65 | + Improvements for layout in Qt driver for Qt3.
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| 66 |
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| 67 | o Materials:
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| 68 | ---------
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| 69 | + G4NistElementBuilder: provide unique name for each isotope of an element.
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| 70 | + G4IonisParamElm: added Fermi velocity and L-factor (both used for
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| 71 | parameterizations of the effective charge and straggling of ions).
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| 72 | G4IonisParamMat: use Fermi velocity and L-factor from G4IonisParamElm.
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| 73 | + Added virtual destructor to G4SurfaceProperty and derivated.
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| 74 | Addresses problem report #1014.
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| 75 | + G4Element: added more safe check of consistence between Z and A in the
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| 76 | constructor. Improved printout of errors and warnings.
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| 77 |
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| 78 | o Particles:
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| 79 | ---------
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| 80 | + Added UI command for setting the verbosity level on the particle-table.
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| 81 | + Modified proton mass to be equal to 'proton_mass_c2' from updated
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| 82 | PDG-2006 values in CLHEP (difference is 10 eV).
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| 83 |
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| 84 | o Persistency (GDML):
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| 85 | ------------------
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| 86 | + Introducing GDML writer: material properties; support for parameterised
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| 87 | volumes; division volumes; replica volumes; matrices; naming of physical
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| 88 | volumes; Twistedtrap, Twistedtubs, Tet, Twistedbox, Twistedtrd, Hype, Orb,
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| 89 | Para, Ellipsoid, Ellipticaltube, Polyhedra, Torus, Cone, Tube, Extruded,
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| 90 | Boolean (intersection, subtraction, union), Reflections (using scaled
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| 91 | transformation) solids; elements and composite materials.
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| 92 | + Added support for modular files in GDML writer and reader. Added handling
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| 93 | of precision and optional rounding of errors for imported/exported values.
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| 94 | Added schema validation mechanism and schema files.
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| 95 | + Added features to reader: physical-volumes name; temperature, pressure
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| 96 | and state of materials; NIST support. Added support for border surface
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| 97 | and skin surface properties.
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| 98 | + Added optional handling if precision on values loaded.
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| 99 |
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| 100 | o Physics Lists:
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| 101 | -------------
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| 102 | + Updated FTF* lists and physics NOT to use quasi-elastic from CHIPS.
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| 103 | FTF now has quasi-elastic included in the FTF model itself.
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| 104 | + Updated option2 EM physics (EMX) and added option3. For these
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| 105 | options it is now defined 'linLossLimit' per particle type;
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| 106 | added hadron induced bremsstrahlung and pair production;
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| 107 | using Spline interpolation for physics tables.
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| 108 | + New helper class G4PhysListFactory for building Physics Lists.
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| 109 | + Removed obsolete class G4HadronProcessStore.
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| 110 |
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| 111 | o Electromagnetic Processes:
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| 112 | -------------------------
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| 113 | + Low Energy:
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| 114 | o Added PIXE cross section, L-shells, for protons in G4OrlicLCrossSection.
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| 115 | Added semi-Empirical model implementation for L-SubShells-Cross-Section
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| 116 | with protons projectiles.
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| 117 | o New charge transfer process by incident protons (two cross-section and
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| 118 | one final state policy classes).
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| 119 | o Added Doppler broadening to G4LowEnergyCompton, based on "Y.Namito,
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| 120 | S.Ban and H.Hirayama, NIM A 349, pp. 489-494, 1994".
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| 121 | Added Doppler broadening in G4LowEnergyComptonPolarized, same model
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| 122 | as in G4LowEnergyCompton.
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| 123 | o Allow for loading the complete Auger dataset on initialization.
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| 124 | o Requires new data set G4EMLOW.6.1.
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| 125 | + High Energy:
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| 126 | o Added new Bremsstrahlung and pair-production models for hadrons.
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| 127 | o Added initialization of 'SubType' for all processes.
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| 128 | + Muons:
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| 129 | o Several fixes and further developments in G4Mu* models and associated
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| 130 | processes.
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| 131 | + Standard:
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| 132 | o New multiple-scattering model G4WentzelVIModel used in new muon
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| 133 | physics processes.
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| 134 | o Cloned G4UrbanMscModel class into G4UrbanMscModel2; introduced several
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| 135 | fixes and tunings to G4UrbanMscModel2 variant.
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| 136 | o New process G4eMultipleScattering specialized for e+,e-.
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| 137 | o G4eBremsstrahlungHEModel: new model, an extension of the standard
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| 138 | Bremsstrahlung model but using a more sophisticated LPM approach.
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| 139 | o G4PAIxSection: new functions for resonance and Rutherford collisions.
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| 140 | o Fixed nuclear size correction for the G4BetheBlochModel.
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| 141 | o G4ionGasIonisation: fixed bug in update of the dynamic charge of an ion.
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| 142 | o G4IonFluctuations: added protection to the computation of the correction
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| 143 | factor to dispersion which provide smooth transition to small velocities
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| 144 | of an ion; added protection in computation of dispersion on allowing
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| 145 | have a corrected dispersion below Bohr value.
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| 146 | o G4eCoulombScatteringModel: speedup run-time computations using
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| 147 | precomputed nuclear form-factors per element.
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| 148 | o G4WaterStopping: using Spline interpolation.
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| 149 | o Added initialization of 'SubType' for all processes.
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| 150 | + Utils:
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| 151 | o New class G4VMscModel to define general multiple-scattering parameters.
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| 152 | o New class G4EmElementSelector, a helper class to sample random
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| 153 | G4Element in a compound material.
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| 154 | o Added new correction methods in order to provide a smooth transition
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| 155 | between low-energy parameterization and Bethe-Bloch model in EM
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| 156 | standard processes. Added new G4EmSaturation helper class.
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| 157 | o G4VEnergyLossProcess: fixed computation of NIEL at the last step of a
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| 158 | particle.
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| 159 | o G4LossTableManager: fixed logic in compute dEdx table for an inactive
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| 160 | process.
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| 161 | + Xrays:
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| 162 | o Added scintillation with Birk's law and make now use of G4EmSaturation
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| 163 | to implement Birks correction.
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| 164 |
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| 165 | o Hadronic Processes:
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| 166 | ------------------
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| 167 | + management:
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| 168 | o Added class G4HadronicProcessStore, helper class to keep pointers to
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| 169 | all registered hadronic processes.
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| 170 | + models/coherent_elastic:
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| 171 | o G4HadronElastic: added counts of abnornal sampling results and
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| 172 | printing out values in the destructor.
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| 173 | + models/de_excitation:
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| 174 | o G4PhotonEvaporation: atomic relaxation model is no longer applied
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| 175 | following internal electron conversion. Instead the vacant shell index
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| 176 | is passed to radioactive decay model, where the ARM is applied.
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| 177 | o Fixed minor memory leak in G4ExcitationHandler.
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| 178 | + models/high_energy:
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| 179 | o G4HEInelastic: removed abnormally high pt secondaries due to incident
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| 180 | strange particles by prohibiting the assignment of leading particle to
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| 181 | anything that goes backward in the CM frame.
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| 182 | + models/neutron_hp:
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| 183 | o Improved energy and angular distributions for both scattered neutron
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| 184 | and recoil targets. Fixed missing inelastic gamma-ray lines.
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| 185 | Addresses problem report #1008.
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| 186 | o Fixed bug for missed pouch-out particles
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| 187 | + models/parton_string:
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| 188 | o Revised string fragmentation and tuned parameters in FTF model for Pi+P
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| 189 | and pion-nucleon interactions. Implemented quasi-elastic hadron-nucleus
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| 190 | scattering in FTF and formation time; tuned string tension.
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| 191 | + models/qmd:
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| 192 | o Fixed and changed sampling method of impact parameter in G4QMDReaction.
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| 193 | o Fixed minor memory leaks.
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| 194 | + models/radioactive_decay:
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| 195 | o G4NuclearDecayChannel: ARM is no longer applied in photon-evaporation
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| 196 | for IT mode and is now applied at the end of DecayIt(); now using the
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| 197 | correct shell index in appling ARM and switching on Auger electron
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| 198 | production. Checking the residual kinetic energy after ARM and adding
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| 199 | it to the atom.
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| 200 | + models/rpg:
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| 201 | o Fixed energy non-conservation problem in G4RPGFragmentation and in
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| 202 | G4RPGReaction. Fixed K0 ID problem in G4RPGInelastic.
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| 203 |
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| 204 | o Generic Processes:
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| 205 | -----------------
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| 206 | + Biasing:
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| 207 | o Fixed use of 'WeightCutOff' now correctly working in a mass geometry.
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| 208 | o Archived obsolete class G4CellFinder.
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| 209 | + Cuts:
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| 210 | o Added G4ProductionCutsTableMessenger class.
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| 211 | + Decay:
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| 212 | o G4DecayWithSpin: modified DecayIt() to allow spin precession also
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| 213 | for EM fields.
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| 214 | + Scoring:
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| 215 | o Added copying of non-ionizing energy deposit in G4Step.
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| 216 |
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| 217 | o Run:
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| 218 | ---
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| 219 | + Invoke G4Particle::DeleteAllParticles() in the destructor of
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| 220 | G4VUserPhysicsList to clear leaks induced by particles created in
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| 221 | the user application.
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| 222 |
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| 223 | o Tracking & Track:
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| 224 | ----------------
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| 225 | + Fix in G4SteppingManager for properly update of 'fTouchableHandle'.
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| 226 | Addressing problem report #1009.
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| 227 | + Reset non-ionizing energy loss in G4Step::ResetTotalEnergyDeposit()
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| 228 | in order to initialize NIEL in each step.
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| 229 |
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| 230 | o Visualization:
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| 231 | -------------
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| 232 | + Fixed remaining gcc-4.3.0 compiler warnings.
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| 233 | + OpenGL:
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| 234 | o Fixed DBL_MAX problem in 2D drawing.
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| 235 | o Improvements in Qt driver and setup.
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| 236 |
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| 237 | o Examples:
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| 238 | --------
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| 239 | + Various fixes, improvements, adoption of new features.
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| 240 | + advanced/hadrontherapy:
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| 241 | o Reviewed example to update to the new beam line setup.
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| 242 | + advanced/microdosimetry:
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| 243 | o New application simulating 10 keV tracks Helium+ (positive
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| 244 | charge is +e) particle in liquid water using only G4DNA processes.
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| 245 | + extended/gdml:
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| 246 | o general polishing and new convention for running.
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| 247 |
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| 248 |
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| 249 | ----------------------------------------------------------------------------
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| 250 |
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| 251 | Technical Notes
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| 252 | ---------------
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| 253 |
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| 254 | o Official platforms:
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| 255 | + Linux, gcc-3.4.6.
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| 256 | Tested on 32 bits architectures and 64 bits architectures
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| 257 | (Intel or AMD) with the Scientific Linux CERN 4 (SLC4) distribution
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| 258 | (based on RedHat Linux Enterprise 4).
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| 259 | Versions of Geant4 have also been compiled successfully on other
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| 260 | Linux distributions, like Debian, Suse or other RedHat systems.
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| 261 | + MacOSX 10.5, gcc-4.0.1
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| 262 | + Windows/XP and CygWin Tools with: Visual C++ 9.0 (Visual Studio 2008)
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| 263 |
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| 264 | o More verified configurations:
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| 265 | + Linux, gcc-4.3.1
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| 266 | + Linux, Intel-icc 10.1
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| 267 |
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| 268 | o Geant4 9.2-beta-01 requires the installation of CLHEP-2.0.3.3.
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| 269 |
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| 270 | Please refer to the Geant4 User Documentation:
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| 271 | http://cern.ch/geant4/support/userdocuments.shtml
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| 272 | for further information about using Geant4.
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