An experimental test of generating ion flow under a complete charge non-neutral condition is proposed. On the experiment, a quasi-neutral plasma is injected into a pure electron plasma which is confined in a Malmberg type trap. So far, the device named BX-U (Beam Experiment Upgrade) confines only electrons having density of 10[sup 11-12] m[sup -3] for ∼ 0.3 s with B[sub z] ∼ 50 G. After completing a plasma gun, the first series of a two-fluid plasma experiment will be initiated. [ABSTRACT FROM AUTHOR]