ELECTROMAGNETIC WORKING GROUP 
 plan of activity for 2013
 =======================================

(1) - June 2013 
(2) - December 2013
(*) - 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 

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1) LHC experiments support
 - EM shower shape - ATLAS and CMS (1/2)
 - Energy deposition in tracking detectors - ALICE (1/2)
 - Multiple and single scattering - LHCb (1/2)

2) Multi-threading for EM physics 
 - optimisation of converted code (1) 
 - addition of dedicated test for multi-threading (1)
 - migration of EM examples to multi-threading (1/2)
 - migration of testing suite to multi-threading (1/2)
 
3) 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)
 - adding bremsstrahlung benchmark (1)
 - provide extended test on EM biasing (1)
 - adding bremsstrahlung transmission test versus EGS (1)
 - adding test of combined hadron scattering (EM + Had) 
 in thick layers (2* summer student)
 - development of electron line-shape test in sampling calorimeter (1)
 - improve validation of energy loss fluctuations (1)
 - automation of backward scattering test (*)
 - adding ILC (including CALICE) calorimeter tests (*)
 
4) Further development of the processes of multiple and single scattering:
 - finalize multiple scattering move to AlongStep [GE] (1)
 - finalize tuning of Urban model (1)
 - addition of next order corrections to WentzelVI model (1) 
 - review and fix of Goudsmit-Saunderson model (2) 

5) Further update of ionization processes:
 - perform study on alternative fluctuation models (1/2)
 - study on accuracy of ionisation models (1/2)
 - refinment of effective ion charge approach (2)
 - alternative ion ionisation models for moderate energies (2)

6) Bremsstrahlung and Compton models:
 - improved parameterisation for positron cross section (2)
 - updated Compton scattering model adding radiative corrections (*)

7) Developments on EM biasing:
 - enable directional bremsstrahlung splitting (1)

8) EM infrastructure update:
 - Maintenence of EM physics builders
 * Opt0 – ATLAS, ALICE
 * Opt1 – CMS
 * Opt2 – LHCb
 * Opt3 – space, medical applications
 * Opt4 – the best combination of standard/low-energy
 - range computation in G4EmCalculator (*)
 - improved G4EmSaturation (*)

9) Improvements in high energy processes
 - improved cross section for e+e- production by muons (1)
 - improved cross section for photo-nuclear production by muons (2)
 - migration of mu+mu- production to model design (2)
 - improved angular generator for synchrotron radiation (2)

10) Optical photon physics
 - Transmission/Reflection probabilities dependent on both wavelength and 
incident angle (1)
 - 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)