Abstract: The disclosure relates to a Hall-effect ion ejection device that comprises a longitudinal axis substantially parallel to the ion ejection direction, and comprises at least: a main ionization and acceleration annular channel, the annular channel being open at its end; an anode extending inside the channel; a cathode extending outside the channel at the outlet thereof; a magnetic circuit for generating a magnetic field in a portion of the annular channel, said circuit including at least an annular inner wall, an annular outer wall and a bottom connecting the inner and outer annular walls and defining the downstream portion of the magnetic circuit; characterized in that the magnetic circuit is arranged so as to create at the outlet of the annular channel a magnetic field independent from the azimuth.

Abstract: The disclosure relates to a Hall-effect ion ejection device that comprises a longitudinal axis substantially parallel to the ion ejection direction, and comprises at least: a main ionization and acceleration annular channel, the annular channel being open at its end; an anode extending inside the channel; a cathode extending outside the channel at the outlet thereof; a magnetic circuit for generating a magnetic field in a portion of the annular channel, said circuit including at least an annular inner wall, an annular outer wall and a bottom connecting the inner and outer annular walls and defining the downstream portion of the magnetic circuit; characterised in that the magnetic circuit is arranged so as to create at the outlet of the annular channel a magnetic field independent from the azimuth.

Abstract: A plasma thruster having a magnetic circuit of a downstream bottom plate from which arms protrude. At least one of the arms includes a permanent magnet. The mass, overall dimensions, electricity consumption, and cost of the thruster are thereby reduced.

Abstract: A plasma thruster having a magnetic circuit of a downstream bottom plate from which arms protrude. At least one of the arms includes a permanent magnet. The mass, overall dimensions, electricity consumption, and cost of the thruster are thereby reduced.

Abstract: According to the process, a toroidal sample of ferrimagnetic material to be analyzed is placed in a thermostatically-controlled enclosure fitted with temperature regulation and detection means. The toroidal sample is submitted to an electro-magnetic magnetizing field of given frequency and the flux induced in the sample is measured directly using a measuring loop, around the sample and which is connected to a vectorial voltmeter.