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Current homogenizing magnetic field structure of multistage cusped magnetic field plasma thruster

A plasma and tangent magnetic field technology, applied in the field of current homogenized magnetic field structure, can solve the problems of high magnetic field strength, uneven electron distribution, large magnetic interface angle, etc., and achieve the effect of reducing material and processing costs

Active Publication Date: 2014-12-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the magnetic field intensity at the wall of the discharge channel of the existing multi-stage tangential magnetic field plasma thruster is too high, and the magnetic field lines emitted at the tip of the magnetic mirror are too close to the central axis of the discharge channel, which causes the electron distribution is not good. Uniformity, low ionization rate, and large magnetic interface angle problems

Method used

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  • Current homogenizing magnetic field structure of multistage cusped magnetic field plasma thruster
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  • Current homogenizing magnetic field structure of multistage cusped magnetic field plasma thruster

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specific Embodiment approach 1

[0026] Specific implementation mode one: combine Figure 3-Figure 8 This embodiment is described. The current homogenizing magnetic field structure of a multi-stage cusp magnetic field plasma thruster in this embodiment includes a casing 1, two fixed end plates 2, a ceramic sleeve 3, an outlet ceramic gasket 4, an anode and Breather 5, multiple magnetic field guide rings 6, multiple annular permanent magnets 7 and multiple magnetic conduction rings 8, two fixed end plates 2 are respectively installed on the upper and lower surfaces of the shell 1, and the ceramic sleeve 3 is vertically mounted on the shell 1, and the lower end of the ceramic sleeve 3 protrudes from the shell 1, the anode and the breather 5 are installed at the bottom of the inner wall of the ceramic sleeve 3 and extend out of the bottom end of the ceramic sleeve 3, the inner wall of the shell 1 and the ceramic sleeve 3 A magnetic conduction ring 8 is respectively provided on the upper and lower end surfaces be...

specific Embodiment approach 2

[0038] Specific implementation mode two: combination Figure 3-Figure 8 To describe this embodiment, the annular permanent magnet 7 of this embodiment is made of samarium and cobalt materials in a ratio of 2:17. Such setting can make the permanent magnet material have higher coercive force, can generate a stronger magnetic field, and can withstand the higher temperature generated when the thruster is working. Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0039] Specific implementation mode three: combination Figure 3-Figure 8 Describe the present embodiment, the magnetic field guide ring 6 of the present embodiment is an annular structure, and the outer diameter of the magnetic field guide ring 6 is identical with the outer diameter of the annular permanent magnet 7, and the upper and lower end faces of the magnetic field guide ring 6 are respectively connected to the outer diameter of the annular permanent magnet 7. Face fit. In this way, the magnetic field guide ring can connect the magnetic fields generated by the annular permanent magnets on the upper and lower end faces into a magnetic flux circuit, and at the same time replace the original permanent magnet mechanism, weaken the magnetic field intensity in the center of the channel, and make the magnetic field lines in the channel outward Expansion, which expands the movement path of electrons, broadens the ionization range, and increases the ionization rate of the gas w...

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Abstract

The invention relates to a current homogenizing magnetic field structure of a multistage cusped magnetic field plasma thruster, and aims to solve the problems that the magnetic field intensity of a discharge channel wall of an existing multistage cusped magnetic field plasma thruster is too high, a magnetic induction line emitted by the tip of a magnetic mirror is too close to the axis of a discharge channel, consequently, electron distribution is non-uniform, ionization rate is low, and a magnetic interface has a large angle. Two fixing end plates are mounted on the upper surface and the lower surface of a shell respectively, a ceramic sleeve is vertically mounted in the shell, an anode and a ventilator are mounted at the bottom end of the inner wall of the ceramic sleeve and extend out of the bottom end of the ceramic sleeve, two magnetic rings are arranged on the upper end face and the lower end face between the inner side wall of the shell and the outer side wall of the ceramic sleeve respectively, one magnetic ring is arranged in a permanent magnet ring to form a component, a plurality of components are horizontally mounted in an inner cavity between the ceramic sleeve and the shell, and a plurality of magnetic field guide rings are arranged on the inner side wall of the shell. The current homogenizing magnetic field structure is used for the field of aerospace.

Description

technical field [0001] The invention relates to a current homogenizing magnetic field structure, in particular to a current homogenizing magnetic field structure of a multi-stage cusp magnetic field plasma thruster. Background technique [0002] The multi-stage cusp magnetic field plasma thruster is a new type of electric thruster developed based on the principle of the Hall thruster. The periphery of the discharge channel of the thruster is a ceramic sleeve, and a multi-stage reverse permanent magnet is used to form a tangent magnetic field. The formed cusp magnetic field can bind the free electrons emitted by the cathode located outside the discharge channel, and the free electrons will go along the The magnetic induction line makes a spiral motion and moves toward the anode under the action of the electric field generated by the high voltage applied by the anode upstream of the channel. The free electrons are affected by the magnetic mirror of the tangential magnetic fiel...

Claims

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Application Information

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IPC IPC(8): H05H1/14
Inventor 刘辉马成毓孙国顺胡鹏陈蓬勃于达仁
Owner HARBIN INST OF TECH
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