Plan2013

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

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)