Cusp field plasma thruster controllable in thrust direction

Abstract

The invention relates to a cusp field plasma thruster controllable in thrust direction and belongs to the field of thrust control of cusp field plasma thrusters. The invention aims at meeting the demand of changing the thrust direction of the cusp field plasma thruster and solving the problems that an existing mechanical structure is complex, heavy in weight and low in reliability. The cusp field plasma thruster controllable in the thrust direction is characterized in that a cathode is fixed on the inner side wall of a shell by virtue of a cathode fixing frame; the cathode comprises N groups of U-shaped excitation teeth which are uniformly distributed along the circumferential direction, and all the U-shaped openings face the center of a circle; a gap is kept between every two adjacent groups of the U-shaped excitation teeth; each group of U-shaped excitation teeth are formed by sequentially connecting an iron core, a magnetic circuit structure and an iron core, and the two iron cores of each group of the U-shaped excitation teeth are respectively independently wound with one group of excitation coil; each iron core is provided with a tip of a section structure; the magnetic circuit structure of each group of U-shaped excitation teeth is mounted on the shell by virtue of the cathode fixing frame; and the thrust direction of the thruster is controlled by independently changing magnitudes of currents input into 2N excitation coils in the N groups of the U-shaped excitation teeth.

Description

technical field [0001] The invention belongs to the thrust control field of a tangential field plasma thruster. Background technique [0002] The tangential field plasma thruster HEMPT is a new type of electric propulsion device that has appeared in the world. It not only has the advantages of high specific impulse, compact structure, and low pollution of electric propulsion, but also makes its thrust stable due to its special structure. High, with continuous adjustable ability, and very little sputtering to the wall surface, so that the service life is greatly improved. [0003] Its working principle is that there is a tangential magnetic field in the ceramic channel of the tangential field thruster. Except for the magnetic tip, most of the magnetic field is parallel to the direction of the wall. The electrons mainly do spiral drift along the magnetic force line, and it is difficult to cross the magnetic field to reach the wall. The particles bounce back and forth under th...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the demand for changing the thrust direction of the tangential field plasma thruster, solve the problems of complex structure, heavy weight and low reliability of the existing mechanical structure, and provide a tangential field plasma with controllable thrust direction Thruster

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