[en] The velocity space distribution of electrons emitted near the forward direction from collisions involving fast, highly stripped oxygen ions with gaseous and solid targets is presented and described in terms of multipole moments of the ejected charge distribution, which permits direct comparison with recent theory. The results are from a novel apparatus permitting rapid and efficient data acquisition by employing position-sensitive electron detection to combine angle definition with conventional electrostatic spectrometry. Excellent agreement is obtained between distribution observed for electron loss to projectile continuum processes and recent theory in the case of argon targets; less favorable results for simpler helium targets may indicate the need for theoretical study of higher order inelastic processes in that case. The multipole content observed with a solid target is consistent with a conceptual model of convoy electron production dominated by electron loss from the projectile within the bulk of the target and may signify the importance of steady-state production of excited states within the bulk solid. 26 refs., 4 figs., 2 tabs