L.A. Hamel 1 , M. Benoit 1 , B. Dönmez 2 , J.R. Macri 2 , M.L. McConnell 2 ,

1. L.A. Hamel1, M. Benoit1, B. Dönmez2, J.R. Macri2, M.L. McConnell2, T. Narita3, J.M. Ryan2, M. Whidholm2 1 Département de Physique, Université de Montréal 2 Space Science Center, University of New Hampshire, Durham 3 Departement of Physics, College of the Holy Cross

2. 2N instead of N2 channels • Rely on good charge sharing between X and Y • Previous model (225 m pitch) has shown poor sharing • Improved simulation for device optimization

5. interaction sites from GEANT4 • Energy deposited at each site is supposed a small 3-D Gaussian e-h distribution

9. Field maps from Comsol multiphysics. • Results shown for the 225 µm model, with a grid.

10. Weighting potentials

11. To download the animation : www.lps.umontreal.ca/~mbenoit/R12-6.zip

12. 225µm model

13. 225µm model

14. 225µm model Experimental Result (Co 57) Simulated result 122 keV, Co57

15. 225µm model Ba-133 Cs-137

16. 150 microns pitch

17. 150µm model Co-57

18. Combination of repulsion, diffusion, trapping, and accurate field and weighting potentials yields to better predictions • Reproduces results for 225 µm pitch • Predicts good sharing for 150 µm pitch