Close-up of injected test particle behavior in Run 2. The red line shows the extent of the M_ms =2 surface, and the black line segments outline the sampling region as in Fig. 8. The purple lines show contour lines of the cometary neutral density, and the background color shows the pickup ion production rate in units of ions m⁻³ s⁻¹. The value of the production rate does not coincide exactly with the neutral density contour lines, instead, the isocontours of production rates follow the M_ms = 2 surface in this region.