Circular plate antenna crossed magnetic field microwave electron cyclotron resonance ion propeller

A technology of electron cyclotron resonance and ion propulsion, which is applied in the direction of using plasma, thrust reverser, machine/engine, etc., can solve the problems of antenna arcing and leakage of charged particles, etc., to improve performance, reduce microwave power density, suppress The effect of strong partial discharge

Active Publication Date: 2020-04-10
DALIAN UNIV OF TECH
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Problems solved by technology

[0005] Aiming at the problems in the prior art of charged particle leakage at the gap between magnetic steels, low power density cut-off at the front end of the rod antenna, and antenna arcing during high-power ions, the present invention provides a circle that can improve the comprehensive performance of the electric propulsion system Plate antenna cross-field configuration microwave electron cyclotron resonance ion thruster cleverly utilizes the radial and axial magnetic gradient forces in the cross-field to confine and drive ions to improve ion generation efficiency

Method used

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  • Circular plate antenna crossed magnetic field microwave electron cyclotron resonance ion propeller
  • Circular plate antenna crossed magnetic field microwave electron cyclotron resonance ion propeller
  • Circular plate antenna crossed magnetic field microwave electron cyclotron resonance ion propeller

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Effect test

Embodiment 1

[0053] The diameter of the disc antenna used in the experiment is 22 mm, the working gas used is xenon, and the flow rate of xenon is 0.6 sccm. Ion extraction experiments were carried out under the conditions of electrical connection between the screen grid and the discharge chamber, and isolation between the screen grid and the discharge chamber.

[0054] Experimental results such as Figure 5 It can be seen from the figure that when the screen grid is electrically connected with the discharge chamber, when the power reaches 38W, the extracted ion beam current will jump and increase sharply. Combined with the comprehensive analysis of the discharge state, it is believed that the jump of the extracted ion current is caused by the hollow cathode effect during high-power discharge. However, when the screen grid is insulated from the discharge chamber, the area of ​​the positive bias electrode is reduced, the hollow cathode effect is suppressed, and the microwave power is increa...

Embodiment 2

[0057] Under the condition of different diameters of the circular plate antenna, the discharge breakdown power and the ion beam current test experiment.

[0058] The diameters of the disc antennas used in the experiment were 18, 22, 26, 30, 34, 38, 42, and 46mm. In the discharge breakdown power test experiment, the xenon gas flow rate was 0.7sccm, and the microwave power was adjustable from 0-140W. In the test experiment of the extracted ion beam, the xenon gas flow rate is 0.7 sccm, and the microwave power is 23W.

[0059] The experimental results of the discharge breakdown power test are as follows: Figure 6 shown by Figure 6 It can be seen that when the diameter of the circular plate antenna is 38mm, the breakdown power reaches the lowest value of 3.5W.

[0060] Combined with the position of the resonance area and the microwave electric field component perpendicular to the magnetic field on the resonance area, a comprehensive analysis shows that if the diameter of the c...

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Abstract

The invention discloses a circular plate antenna crossed magnetic field microwave electron cyclotron resonance ion propeller, and belongs to the technical field of microsatellite electric propulsion.Microwave energy is fed by adopting a circular plate antenna, the microwave power density of the antenna is decreased, antenna arcing is inhibited, the cut-off power density is increased, the transverse microwave electric field intensity of a resonance region is increased, the breakdown power is reduced, the plasma generation efficiency is improved, and meanwhile the plasma radial uniformity is improved. A closed permanent magnet steel column body is composed of circular-arc-shaped magnet steel blocks and forms a crossed magnetic field with an end face annular magnetic field, therefore, ions are effectively constrained and driven through the radial and axial magnetic gradient force, and the ion generation efficiency is improved. Meanwhile, charged particle leakage at a weak magnetic fieldin a magnet steel clearance is reduced through the closed magnetic field. Under optimized resonance region distribution, an electron cyclotron resonance region on the front end face can be covered byadopting a thin aluminum plate, local strong discharge of the region is inhibited, the plasma generation efficiency is improved, and the performance of the propeller is further improved.

Description

technical field [0001] The invention belongs to the technical field of micro-satellite electric propulsion, in particular to a disc antenna cross-magnetic field microwave electron cyclotron resonance ion thruster. Background technique [0002] With the improvement of satellite manufacturing technology and satellite performance, cost-effective micro-satellites (groups) have been used more and more. Attitude control and orbit keeping of micro-satellites require propulsion systems with small volume, low mass and high specific impulse. Electric propulsion with high specific impulse will gradually replace traditional chemical propulsion with low specific impulse and become the main propulsion method for micro-satellite systems. As a kind of electric propulsion, microwave electron cyclotron resonance ion thruster has the advantages of magnetic field confinement and electron cyclotron resonance heating, and can obtain high ionization rate and high density plasma under low pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03H1/00
CPCF03H1/0087
Inventor 付省辉丁振峰杜满强李娟
Owner DALIAN UNIV OF TECH
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