AMPTE/CCE observations of shell‐like He2+ and O6+ distributions in the magnetosheath

Abstract
We present the first simultaneous observations of solar wind He2+ and O6+ shell‐like distributions in the magnetosheath. The He2+ and O6+ distributions are centered on the downstream H+ bulk velocity and have radii proportional to mass/charge. These observations are consistent with the electrostatic cross‐shock potential model discussed in the text.