Table 1 shows the deflection for ions passing between a field free and high field region. Effects were most pronounced when an ion was decelerated after passing through a grid. In these cases the perpendicular velocity introduced by the field non-homogeneity at the grid could become a significant fraction of the total velocity. A two stage source and a two stage reflector were used. A 20 mm diameter detector was placed 500 mm from the reflector.
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The simulation results are listed in Table 2. Results were independent of drift energy.