Plan2014

ELECTROMAGNETIC WORKING GROUP plan of activity for 2014 =======================================

(1) - June 2014 (2) - December 2014 (*) - will be done if manpower will be identified [LE] - in collaboration with the Low-energy EM working group [GE] - in collaboration with the Geometry working group [HAD]- in collaboration with the Hadronic working group

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1) Multi-threading for EM physics

• further cleanup of EM code for MT (1)
• clarify and fix behavior of EM options in MT and sequential mode (1)
• migration remaining EM examples to multi-threading (1/2)
• migration of testing suite to multi-threading (1/2) (*)

2) Validation and verification of EM physics

• perform regular execution and regression analysis using existing testing suites (1/2)
• continue detailed comparison of Standard, Livermore and Penelope models [LE] (1/2)
• validation of Geant4 for design studies on future colliders (2)
• restart testing of backward scattering (1)
• add CALICE calorimeter tests, focusing on lateral shape (2) (*)
• add Cerenkov calorimeter test (2) (*)
• add bremsstrahlung benchmark (2) (*)
• add bremsstrahlung transmission test versus EGS (2) (*)
• development of electron line-shape test in sampling calorimeter (2) (*)

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

• finalize multiple scattering move to AlongStep [GE] (1)
• added lateral displacement option at boundary (1)
• addition of next order corrections to the WentzelVI model (1)
• review and fix of the Goudsmit-Saunderson model (2) (*)

4) Further update of ionization processes:

• improve Urban fluctuation models (1)
• perform study on alternative fluctuation models (1/2)
• refinement of Birks effect helper class interface (1) [HAD]
• refinement of effective ion charge approach (1)
• study on accuracy of range simulation for therapevtic beams (2)
• alternative ion ionisation models for moderate energies (2) (*)

5) Bremsstrahlung and gamma models:

• improved parameterisation for positron cross section (2) (*)
• update Compton scattering model adding radiative corrections (2) (*)
• update gamma conversion model below 10 MeV (2) (*)
• feasibility study on the new model for e+e- pair production by e- and e+ (2) (*)

6) EM infrastructure update:

• Maintenance of EM physics builders
• Opt0 - ATLAS, ALICE
• Opt1 - CMS
• Opt2 - LHCb
• Opt3 - HEP R&D, space, medical and other applications
• Opt4 - the most accurate combination of standard/low-energy for HEP R&D, space, medical and other applications
• range computation in G4EmCalculator (*)

7) Improvements in high energy processes

• improved cross section for photo-nuclear production by muons (2)
• migration of mu+mu- production to model design (2) (*)
• Extended TestEm6 to have validation on cross sections and final state for rare high energy processes (2) (*)

8) Optical photon physics

• Extension to the unified surface model to have both specular and diffuse components for the transmitted photons (2)
• Modeling of optical transport in a volume that has different optical treatments on different sides (2)