| 摘要 |
<p>The invention concerns a device for concentrating ion beams for a hydromagnetic propulsion means with closed electron drift comprising: a) a flared magnetic polar part (63) substantially truncated, open at its two ends and designed to be located downstream of the hydromagnetic propulsion means output plane, comprising a ring-shaped ionisation and acceleration channel (1) and peripheral (3) and central (4) polar parts arranged on either side of the ring-shaped channel (1) to generate a substantially radial magnetic field in an output plane perpendicular to the ring-shaped channel (1) axis; and b) a supplementary peripheral magnetic circuit (60) connecting the flared magnetic polar part (63) downstream end with the peripheral polar part (3), the flared magnetic polar part (63) co-operating with the supplementary peripheral magnetic circuit (60) and the peripheral (3) and central (4) polar parts to define the shape of the magnetic field downstream of the ring-shaped channel (1) so as to force the ion beams emitted by the ring-shaped channel (1) to remain inside a substantially conical zone whereof the predetermined top angle is defined by the flared magnetic polar part (63) top angle.</p> |
