A tangential-field plasma thruster capable of fine-tuning discharge performance

Abstract

The invention provides a tangential-field plasma thruster capable of fine-tuning discharge performance, which includes a magnetically conductive anode with one end arranged at the bottom of a ceramic channel and one end as a free end, a winding sleeve, a ceramic ring, and an excitation coil. The sleeve includes a cylindrical sleeve, a limiting plate and a connecting plate, the limiting plate and the connecting plate are fixedly arranged at both ends of the cylindrical sleeve, a winding area is formed between the limiting plate and the connecting plate, and the magnetic anode is free The end passes through the cylindrical sleeve of the winding sleeve, the ceramic ring is disposed between the inner wall of the cylindrical sleeve and the outer surface of the magnetically conductive anode, the excitation coil is wound on the outer surface of the winding sleeve, and the winding sleeve It is fixedly connected with the thruster cover plate and the thruster casing in turn, and the tangential field plasma thruster includes at least two permanent magnets. The invention realizes the adjustable and controllable magnetic field of the thruster by adjusting the coil current, and further regulates the ionization acceleration process inside the thruster by adjusting the magnetic field, thereby realizing the fine adjustment of discharge and performance parameters.

Description

technical field [0001] The invention belongs to the design field of tangential field plasma thrusters, in particular to a tangential field plasma thruster capable of fine-tuning discharge performance. Background technique [0002] The tangent field plasma thruster is a new electric propulsion system. During the discharge process, the electrons released by the cathode are constrained by the tangential magnetic field, and under the action of the magnetic mirror effect, they reciprocate and spirally move at the magnetic tip inside the channel, which can not only ensure the effective confinement of electrons, improve the ionization rate, but also greatly Reduce the frequency of collisions of electrons with the inner walls of the channel. The ions generated by ionization are accelerated by the local electromagnetic field at the exit of the channel, and a plume is formed at the exit to generate thrust. Therefore, the tangent field thruster combines the advantages of the ion thru...

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Problems solved by technology

[0003] However, in order to ensure the accuracy of satellite orbit control, no-drag control puts forward very high requirements on the thrust resolution and implementation accuracy of the thruster. However, in the current research on the tangential field thruster, it is found that although the thrust can be adjusted in a wide range and cover the thrust range, but its adjustment resolution has not yet met the requirements of no-drag control, so there is an urgent need for a tangential field thruster that can fine-tune the internal discharge process of the thruster, improve thrust resolution, and achieve precision

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