release 4.1 - highlights

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release 4.1 - highlights
Gabriele Cosmo, CERN/IT
Geant4 Users Workshop Salamanca - July 15-19,
2002
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New features

• Event biasing
• Introduced first implementation of geometrical
  importance biasing
• associated to logical volumes defining detector
  regions
• First implementation of algorithms for scoring
  associated to
• particle types
• New extended examples for importance biasing and
  scoring

• Magnetic field
• Tuning of integrator driver for very small and
  large steps

• Physics processes - electromagnetic
• New process for gamma conversion into muon pairs
• New implementation of models for
  transition-radiation detectors
• Tuning and optimisation of multiple scattering
  algorithm
• New more advanced algorithm for multiple
  scattering
• Extended parameterisation of e- ionisation for
  low-energy processes
• New data set for low-energy electromagnetic
  (G4EMLOW 1.1)

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New features - 2

• Hadronic processes
• First implementation of leading_particle model
  for radiation background simulations (MARS)
• Energies below 5 GeV (proton/neutron/pion/kaon/gam
  ma/anti_proton)
• Included gamma-nuclear reactions in QGS model
• Included charge state treatment for recoils
• New class for the calculation of projectile
  fragment cross-sections in ion-ion reactions
• Particles
• Implemented leptonic decay channels for Tau
• User Interface
• New class G4UIGainServer, socket extension for GAG

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New features - 3

• Geometry
• First release of GDML parser for importing XML
  detector descriptions
• Currently limited to CSG solids
• Provided as extended example
• Ability to activate 3D optimisation for
  parameterised volumes
• Enhancements
• New commands for detection of overlapping
  geometries
• Enhanced memory allocation of volumes and solids
• Extended reflection of volumes to cover all CSG
  and specific solids
• Enhanced algorithm for extent calculation in
  G4Tubs
• New extended application for detection of
  overlapping volumes in a detector geometry

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Features planned for Geant4 5.0

• Geometry Transportation
• GDML binding
• Implementation of import module for GGE and
  GBuilder
• Identify areas of binding with Geant4 (CAD/STEP)
• Solids
• New twisted trapezoid shape
• Enhancements
• Implement mechanism for dumping solids/volumes
• Automatic detection of some forbidden or illegal
  geometry set-ups
• Abstract navigator and transportation
• First design iteration
• Magnetic field propagation
• Use of safety for optimisation

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Features planned for Geant4 5.0 - 2

• General developments
• Cuts per regions
• Design and implementation of ability to define
  different production thresholds by geometrical
  region
• G4Exception
• Redesign of G4Exception according to severity
  levels
• Particles Tracks
• Implement ability to retrieve/save particle
  properties persistently to/from files
• Implementation of HepPDT interface
• Improvements in tracking performance

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Features planned for Geant4 5.0 - 3

• Electromagnetic physics
• Standard electromagnetic
• New implementation of process for Synchrotron
  radiation
• Re-design of processes according to model
  approach
• Requirements gathering for physics processes
  above 10 TeV
• Prototype of plotting of cross sections, DE/dx,
• Low Energy electromagnetic
• Design iteration for model approach with
  standard EM processes
• New physics features

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Features planned for Geant4 5.0 - 4

• Hadronic physics
• Create and document educated guess physics lists
  for major use cases
• Release fully biased MARS-5 rewrite
• Release of cascade part of HETC rewrite
• Release if new kinetic model
• Provide generic scattering term for cascade type
  models
• Improve validation suite for the cascade energy
  range
• Improve electro-nuclear cross-sections to
  consider hard-scattering

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Features planned for Geant4 5.0 - 5

• Visualisation Graphics Representations
• Implementation of XML-based DTREE
• Implementation of DCUT (slice picture) in
  multiple drivers
• Implementation of a smarter DrawTrajectory()
  method
• Flexible interface to WIRED event-display
  (network control)
• Improvements to visualisation commands
• Introduction of flushAll command
• Interface to Gbuilder for geometry modeling
• Improvements to HepPolyhedron and
  BooleanProcessor classes
• User and Category Interfaces
• XML-based interfaces
• Integration of GUI with AIDA 2.2 for histogramming

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Features planned for Geant4 5.0 - 6

• Persistency
• Design review
• Better modularisation separating functional
  interface and concrete implementations
• Extend ability to switch among multiple
  persistency technologies
• New example to support LCG persistency and ROOT
  I/O
• Support for persistent and transient HepMC
• Implementation of base class to register user
  converters