2024 Milestones

ELECTROMAGNETIC WORKING GROUP

Plan of activity for 2024

1) Infrastructure and general support for EM physics

  • Conduct regular execution and regression analysis using the existing testing suites.
  • Maintenance of EM libraries, continue applying clang-tidy and clang-format to EM classes.
  • Migration of EM tests from SLC7 to AlmaLinux9.
  • Contribution to development of ATLAS validation suite for EM physics.
  • Update calls IsMaster() from all classes and sub-packages for effective handling of shared data.

2) Extended functionality of G4HepEm package

  • Refactor some of the data structures in G4HepEm, especially the macroscopic cross sections: move from plain arrays to more structured data.
  • Configuration per detector region: e.g. provide the possibility to use different MSC stepping in different detector regions (as used by CMS).
  • Add the missing gamma- and lepto-nuclear cross section and implement connection layer for tracks from G4HepEm to native Geant4 tracking for sampling of final state of nuclear processes.
  • Implement the “general process”-like handling of the macroscopic cross sections.
  • Implement the possibility of Woodcock tracking of gamma per region.
  • Extend and optimize tracking algorithms per particle type.
  • Prepare G4HepEm to be used by ATLAS and CMS.

3) Developments for LHC and other HEP experiments

  • Further development on EM models for beam transport and interactions in bending crystals, implementation of coherent pair production model.
  • Implementation of new examples demonstrated crystal based positron source, crystal-based extraction of electron beam from a synchrotron, crystalline undulator.
  • Implementation of extended example to illustrate simulation of the coherent interactions of charged particles and strong field effects in oriented crystals.
  • Calculation in LO and NLO of QED-corrected cross sections of electron and muon scattering on nuclei.
  • Development of a new 5D angular generator for e+e- pair production.
  • Support and R&D for the ATLAS TRT (X-Ray transition radiation).
  • Develope a new example for simulation of inverse Compton scattering.
  • Provide an option to use EPICS-2017 data for standard gamma processes.
  • Include 3-gamma annihilation models into EM physics lists.

4) Updates of low-energy EM models

  • Addition of revised momentum profiles for the Compton scattering.
  • Addition of extra materials to MicroElec models.
  • Development of a new exmple for demonstration of MicroElec models.
  • Evaluation of a possibility of introducing of plasma state and energy loss models in plasma.
  • Evaluation for low-energy extention of the PAI model.
  • Extention of quantum entaglement effect on the Compton scattering for full gamma scattering history.
  • Continue development of computations for heavy ion ionisation and de-excitation using full j-j approach. Preparation of precomputed tables of cross sections.
  • Verification of reverse/adjoint physics models for thin and thick shielding and application to space scenarios.
  • Integration of processes of production and decay of orto- and para- positronium.

5) G4-Med developments

  • Validation of EM and hadronic models for medical applications.

6) Optical photon and X-ray physics

  • Maitenence and optimisation of optical classes.
  • Development of a processes of Bragg reflection of X-Rays from outer and inner crystals surfices for slabs and for cilinder shells.
  • Implement UI commands and builders to include X-ray refraction and reflection on top of standard physics.
  • Integration of quantum entanglement effect to optical photons.
  • Continue integration of Opticks package: provide example of optical processes implemented on GPU and other processes at CPU; demonstration of tracing of optical photons in liquid Argon TPC; addition of Scintillation and Wavelength Shifting processes.

7) DNA physics and chemistry developments

  • Improve DNA physics models for ions.
  • Integration of Li cross sections.
  • Extension of Geant4-DNA to be used for space radiation protection
  • Implementation of the option4 relativistic electron inelastic model.
  • Benchmarking ELSEPA and Uehara elastic models.
  • Implement propan cross section.
  • Implementation electron impact inelastic cross sections for Gold nanoparticles using relativistic plane wave approximation and taking into account surface effects.
  • Develop models for electron interactions in atmosphere.
  • Provide an example to compute density of ionisation depending on altitude.
  • Validation of IRT-syn at different dose rates.
  • Validation of Geant4-DNA using radiobiological experiments on human skin fibroblasts at ANSTO.
  • Validation of human normal and malignant cell irradiation with ion species for estimation of RBE dependence on LET and evaluation of DSB as a function of post-irradiation time.
  • Development of Fricke dosimeter example.
  • Optimization of thermalization distance of water displacement for chemistry applications.
  • Study on homogeneous chemistry and boundary conditions.