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Integrated hollow cathode

A hollow cathode, one-piece technology, applied in the field of plasma, can solve the problems of low heat preservation efficiency, shorten ignition time, etc., and achieve the effect of improving heat preservation efficiency, prolonging expected service life, and improving heat preservation

Inactive Publication Date: 2018-08-28
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides an integrated hollow cathode, which can overcome the insufficiency of the low heat preservation efficiency of the separated heat shield assembly, realize efficient heat preservation, further shorten the ignition time, and improve the working life

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  • Integrated hollow cathode

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Embodiment Construction

[0019] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0020] Such as figure 1 As shown, the integrated hollow cathode of this embodiment includes a heat shield top 1 , a heat shield cylinder 2 , a heat shield support 3 , a support flange 4 , a heat shield insert 5 , a heating wire fixing ceramic 6 , and a heater assembly 7 . The heat shield top 1, the heat shield cylinder 2, the heat shield support 3, the heat shield inlay 5 and the heating wire fixed ceramic 6 jointly form a heat shield assembly.

[0021] Wherein, one end of the heat shielding tube 2 is provided with a heat shield top 1 and the other end is provided with a heat shield support 3 . The top 1 of the heat shield is a tantalum skin with a thickness of 0.4mm, and a hole of 7mm is opened in the center to emit electrons in the emitter. The heat shield support 3 supports the heat shield cylinder 2 and has the same diameter as the heat shield cylind...

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Abstract

The invention provides an integrated hollow cathode so that a defect of low heat retention efficiency of the separate heat shield assembly can be overcome and thus the high-efficiency heat retention can be realized, the ignition time can be shortened, and the service life can be prolonged. According to the invention, a heat shield assembly previously separated from a heater assembly is connected with the heater assembly together; a heating filament mounting hole is formed in a heat shield support; a heating filament is fixed with the heater assembly through the heating filament mounting hole;the space between the heating filament and the heating filament mounting hole is filled with a heating filament fixation ceramic; and the heating filament is insulated from the heat shield support bythe heating filament fixation ceramic to obtain an integrated heat shield assembly. With the integrated heat shield assembly, heat losses caused by the hollow cathode along the axial direction are reduced and the heat retention efficiency of the heater assembly is improved, so that the heat retention, ion bombardment resistance, service life, and insulating properties of the hollow cathode are improved effectively, the working efficiency of the hollow cathode is improved; and the expected service life of the hollow cathode product is prolonged.

Description

technical field [0001] The invention relates to the technical field of low-temperature vacuum electron plasma, in particular to an integrated hollow cathode with a heat shield assembly and a heating assembly, which is used for the main cathode and neutralizer of space electric thrusters. Background technique [0002] The hollow cathode is a key component of the electric thruster, and its characteristic is that it can use the rebound of xenon ions to maintain the temperature of the emitter under the rated gas supply condition, so that the emitter can continuously emit electrons. Therefore, during the working process of the hollow cathode, it is necessary to reduce the heat loss of the emitter part of the heater, so that most of the heat can be kept in the small space of the heater head as much as possible, thereby reducing the power loss of the hollow cathode and prolonging its life. life span. [0003] In the existing hollow cathode, a separate heat shield assembly is gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/02
CPCH01J1/025
Inventor 郭宁冯杰张天平唐福俊王世伟刘明正王尚民王倩楠杨威
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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