ELECTROMAGNETIC WORKING GROUP plan of activity for 2011 ======================================================

(1) - June 2011 (2) - December 2011 (?) - manpower not yet assigned [LE] - in collaboration with the Low-energy EM working group [HAD]- in collaboration with the Hadronic working group [GEO]- in collaboration with the Geometry and Transport working group [MAT]- in collaboration with the Generic processes and materials working group [!] - part of the Collaboration goal

1) Validation and verification of EM physics:

  • continue detailed comparison of Standard, Livermore and Penelope models [LE] (1/2)
  • adding extra automatic tests on low-energy hadron scattering (?)
  • adding ILC (including CALICE) calorimeter tests (2)
  • adding test on fluctuation of energy loss at moderate energies (?)
  • improve and extend validation web interface (?)
  • study on muon and synchrotron radiation backgrounds for accelerator applications of Geant4 (2)
  • establish automatic running of the CPU benchmark (1)
  • adding fully automatic test of ranges (?)
  • adding extra test on low-energy electron ionisation [LE] (1)
  • CPU performance study and investigate variants to speedup LHC simulation (2)

2) Material category development:

  • introduce “base material” approach as a first step to variable density approach [LE, MAT] (1) !
  • adding extra data on molecule levels [LE, MAT] (2)
  • review and upgrade of G4SandiaTable [MAT] (2)
  • redesign the G4MaterialPropertyVector class interfaces for G4Scintillation and optical processes to employ spline interpolation to empirical input [MAT] (1)

3) EM infrastructure update:

  • adding interface to differential cross sections [MAT + LE] (2)
  • provide range computations inside G4EmCalculator (2)
  • Automatic treatment of process ordering parameters in physics lists (1) !

4) Further update of ionization processes:

  • review and improvements for ion ionisation model for high and moderate energies (1)
  • providing usage of “base material” approach (1)
  • review of the PAI model implementation (2)
  • new model of delta-electron production based on ICRU’52 data (2)

5) Further development of the processes of multiple and single scattering:

  • further development of WentzelVI model (1)
  • further development of Goudsmit-Saunderson model (1)
  • establish more effective sampling of displacement in Urban model (2) - DONE
  • hadron multiple scattering coherent with hadron diffuse model (2)
  • review of design and implementation of the interface to geometry for treatment of lateral displacement [GEO] (2)

6) Bremsstrahlung and gamma-conversion models:

  • derive new parametrisation for Std Bremsstrahlung (below 1 GeV) using existing data for all materials (1)
  • providing example for ultra-relativistic gamma-conversion model (?)
  • updated gamma-conversion model at low-energies (?)

7) Improved implementation of photon processes

  • improved X-rays fluorescence sampling in photo-electric model (1)
  • improved Compton scattering model with Doppler broading (1)

8) Polarisation

  • implementation spin precession in magnetic field using Stokes vectors representation (?)

9) Improvements in high energy processes

  • migration of mu+mu- production processes to model design (?)

10) X-ray production processes

  • Improved sampling of X-ray spectrum of Cerenkov (1)

11) Optical photon physics

  • Extension to the unified surface model to have both specular and diffuse components for the transmitted photons (?)
  • Implementation of a more flexible micro facet sampling method for optical surfaces (?)
  • Extend some of the boundary process implementation to X-rays (?)
  • Modeling of optical transport in a volume that has different optical treatments on different sides (?)

12) User support, communications and publications

  • Communicate with LHC experiments and providing supports as a first priority
  • Providing support for medical and space users
  • Working with HyperNews forums
  • Participation in international conferences and workshops
  • Providing tutorial courses
  • Providing support and perform common validation for adjoint models