Velocity space diagrams of a pickup ion torus distribution as a (v_x,v_y)-projection (top left panel) and in the v_z = 0 km s^-1 plane (top right) are shown for a magnetic configuration in which B is almost perpendicular. Here, v_x, v_y, and v_z are the three vector components of v_ion, whereas v_x is the velocity parallel to v_sw. The bottom two panels show the torus distribution under the influence of pitch-angle scattering (right) and adiabatic cooling (left). To illustrate the torus character of the distribution, the (v_x,v_y)-plane is slightly tilted in this diagram.