Figure 3
Comparison between (a) a Fresnel correction coil, (b) a linear shifter and (c) a radial shifter. On the top row are illustrations of the coils with the active beam area shown in yellow. On the bottom row, the magnetic line integrals are plotted over the cross-sectional area. A current of I = 10 A and a wire density in the coils of nW = 2 mm−1 were assumed. |