Abstract:
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.
Abstract:
The anode means of a Hall accelerator with a main discharge area has coaxial cylindrical electrodes aligned with the longitudinal axis of the main discharge area and an auxiliary electromagnet surrounding the electrodes, and an electric field is applied across the cylindrical electrodes while the auxiliary electromagnet produces an axial magnetic field therebetween so that a preionization discharge area is formed in communication with the main discharge area.
Abstract:
In certain example embodiments of this invention, there is provide an ion source including an anode (25) and a cathode (5). In certain example embodiments, the cathode does not overhang over the anode, or vice versa. Since no, or fewer, areas of overhang are provided between the anode and cathode, there is less undesirable build-up on the anode and/or cathode during operation of the ion source so that the source can run more efficiently. Moreover, in certain example embodiments, an insulator (35) such as a ceramic or the like is provided between the anode and cathode.
Abstract:
In certain example embodiments of this invention, there is provided an ion source including an anode (25) and a cathode (5) . In certain example embodiments, a multi-piece outer cathode (5b') is provided. The multi-piece outer cathode (5b') allows precision adjustments to be made, thereby permitting adjustment of the magnetic gap between the inner and outer cathodes. This allows improved performance to be realized, and/or prolonged operating life of certain components. This may also permit multiple types of gap adjustment to be performed with different sized outer cathode- end pieces. In certain example embodiments, cathode fabrication costs may also be reduced.
Abstract:
A method and/or system for cleaning an ion source is/are provided. In certain embodiments of this invention, both the anode and cathode of the ion source are negatively biased during at least part of a cleaning mode. Ions generated are directed toward the anode and/or cathode in order to remove undesirable build-ups from the same during cleaning.
Abstract:
The invention relates to a Hall effect plasma thruster including a main annular ionization and acceleration channel (120) having an open downstream end (129), at least one cathode, an annular anode that is concentric with the main annular channel (120), a pipe and a dispenser for feeding an ionizable gas into the channel (120), and a magnetic circuit for generating a magnetic field in the main annular channel (120). The main annular channel (120) includes portions of inner (127) and outer (128) annular walls located in the vicinity of the open end and (129) each including an assembly of conductive or semiconducting rings (150) juxtaposed in the form of blades separated by thin layers of insulation (152).
Abstract:
An ion source capable of generating and/or emitting an ion beam which may be used to deposit a layer on a substrate or to perform other functions is provided. The ion source includes at least one anode and at least one cathode. In certain example embodiments, the anode may have a recess formed therein in which ions to be included in the ion beam may accelerate. Walls of the recess optionally may be insulated using, for example, ceramic. One or more holes may be provided to allow a supply of gas to flow into the recess, and those holes optionally may be tapered such that they narrow towards the recess. Thus, certain example embodiments produce an ion source having a higher energy efficiency (e.g., having increasing ion energy).
Abstract:
A closed drift ion source is provided, having an anode that serves as both the center magnetic pole and as the electrical anode. The anode has an insulating material cap that produces a closed drift region to further increase the electrical impedance of the source. The ion source can be configured as a round, conventional ion source for space thruster applications or as a long, linear ion source for uniformly treating large area substrates. A particularly useful implementation uses the present invention as an anode for a magnetron sputter process.