Electrostatic calculation of Coulombian forces generated by the electrode voltage (CV), the depletion voltage (BSS), and the electrons collected. This figure is a zoom of the last 20μm of 100μm thick simulated pixels. The black lines represent the electric field for empty pixels, and the red lines represent the electric field when the right most pixel is filled with 50 ke−. The separations between two adjacent pixels are indicated by the bold lines and are shifted to the right when adding the charges. This results in a variation of pixel effective size: the size of the filled pixel has decreased, while the size of neighbor pixel has increased (and its centroid has slightly shifted). This figure also qualitatively confirms the observation that the effect is achromatic: we see that drift trajectories are altered in the bottom ~10μm of the device only, and hence do not depend significantly on the conversion depth.
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