Plan2014

ELECTROMAGNETIC WORKING GROUP 
plan of activity for 2014
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(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)