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Laval nozzle type magnetic confinement hollow cathode

A hollow cathode and magnetic confinement technology, which is applied in the aerospace field, can solve the problems of reducing the performance and life of the hollow cathode, avoid bombardment corrosion and plasma loss, improve the overall performance, and increase the service life.

Inactive Publication Date: 2018-04-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the structure of the existing hollow cathode will reduce the performance and life of the hollow cathode, thereby providing a Rafal nozzle type magnetically confined hollow cathode

Method used

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  • Laval nozzle type magnetic confinement hollow cathode
  • Laval nozzle type magnetic confinement hollow cathode
  • Laval nozzle type magnetic confinement hollow cathode

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specific Embodiment approach 1

[0020] Specific implementation mode one: combine image 3 and Figure 4 Specifically explain this embodiment, the Rafal nozzle-type magnetically confined hollow cathode described in this embodiment includes an outer tube 1, a cathode tube 2, a contact pole 3 and a cathode top plate 4;

[0021] The cathode tube 2 is overcoated with an outer tube 1, the bottom of the cathode tube 2 is provided with a cathode top plate 4, the bottom of the outer tube 1 is provided with a contact electrode 3, the centers of the cathode top plate 4 and the contact electrode 3 are provided with small holes, and the cathode top plate 4 and the contact electrode 3 are provided with small holes. The small hole channel from the top plate 4 to the contact pole 3 is a tapered and expanded channel 5 . This embodiment also includes a permanent magnet 6; the permanent magnet 6 is arranged in the cavity formed by the outer tube 1, the cathode tube 2, the cathode top plate 4 and the contact pole 3, and is loc...

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Abstract

The invention discloses a laval nozzle type magnetic confinement hollow cathode, relates to the field of aerospace and aims to solve the problems that as for the structures of existing hollow cathodes, the properties of the hollow cathodes are reduced and the service life of the hollow cathodes is shortened. A cathode tube is sleeved with an outer tube, a cathode top plate is disposed at the bottom of the cathode tube, a contact pole is disposed at the bottom of the outer tube, small holes are formed in the centers of the cathode top plate and the contact pole correspondingly, and a small-holechannel from the cathode top plate to the contact pole is a gradual-shrinkage gradual-expansion type channel. The laval nozzle type magnetic confinement hollow cathode is applicable to hollow cathodes.

Description

technical field [0001] The invention relates to the aerospace field, in particular to a hollow cathode. Background technique [0002] Hollow cathodes are widely used in hollow technology due to their excellent characteristics. The hollow cathode is used as the main cathode and the neutralizer cathode in the ion thruster respectively. The main cathode is used to generate the original electron ionization collision center gas to form plasma in the discharge chamber, and the neutralizer cathode generates electron flow to neutralize the ion beam to prevent the ion beam from electrifying the spacecraft. In the Hall thruster, only one hollow cathode is needed as the electron source and neutralizer at the same time, and two hollow cathodes are often used as backups for each other in practical applications. The space vehicle will accumulate charge and induce discharge after a long period of space operation. In order to alleviate the charging phenomenon in the spacecraft, a plasma c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03H1/00
CPCF03H1/0006
Inventor 宁中喜韩星初彦峰刘晓宇王福锋刘晨光
Owner HARBIN INST OF TECH
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