Mixed-effect ring type ion thruster based on segmented anode

Abstract

The invention discloses a mixed-effect ring type ion thruster based on a segmented anode. Firstly, a working medium is pushed to enter a discharge chamber from an outer ring annular working medium distributor located in the upstream of a gate, and working medium gas is distributed at a normal velocity of an external anode wall, so that density of the working medium gas is low at the downstream part of a cathode, a radial electric field is formed between the segmented anodes, and an E x B cross-field is formed in a downstream region of the cathode together with a magnetic field passing throughan axis of the cathode. Then a bias cathode releases high-energy electrons, the high-energy electrons are constrained under a magnetic mirror effect of a permanent magnet, and circumferential Hall drift is performed under the Hall effect of the E x B cross-field, and ionizing promotes the working medium to form a plasma. Then, the plasma is led out and accelerated by an annular gate. Finally, electrons emitted by a neutralizer neutralize to form plume to generate push force. According to the thruster, a plurality of effects are coupled based on the segmented anode design, the circumferential uniformity of the high-energy electrons and the plasma emitted by the bias cathode can be improved, the working condition of a gate is improved, and the service life of the gate is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electric propulsion, and more specifically relates to a mixed-effect ring-type ion thruster based on segmented anodes. Background technique [0002] At the beginning of 2020, my country's lunar exploration program "Chang'e Project Phase III" was successfully completed, a deep space exploration network was initially established, and the Mars exploration program was put on the agenda. The primary problem in carrying out the Mars exploration mission is the carrying problem of the probe. If the probe wants to get rid of the gravity of the earth and enter the orbit of Mars, its flight speed must exceed the second cosmic speed. At the same time, the probe has to go through an extremely long flight time, during which it also withstands various forces, heat and radiation disturbances. Therefore, carrying out the Mars exploration mission puts forward higher requirements on the thrust, power, specific impulse, eff...

AI Technical Summary

Problems solved by technology

But at the same time, due to the discharge cathode bias, there are problems such as difficulty in discharge and uneven distribution of particles in the circumferential direction.

This problem greatly limits the further development and application of the annular ion thruster

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