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 Montréal2 Space Science Center, University of New Hampshire, Durham 3 Departement of Physics, College of the Holy Cross

• 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

interaction sites from GEANT4

Energy deposited at each site is supposed a small 3-D Gaussian e-h distribution

tNe

DzyxR

zyx )5

1)

4

3(

15

1(2

,,0

.,2

• Field maps from Comsol multiphysics.

• Results shown for the 225 µm model, with a grid.

Weighting potentials

To download the animation :

www.lps.umontreal.ca/~mbenoit/R12-6.zip

• 225µm model

• 225µm model

• 225µm model

ExperimentalResult (Co 57)

Simulated result122 keV, Co57

• 225µm model

Cs-137

Ba-133

150 microns pitch

• 150µm model

Co-57

• 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