A Beam Target for Ground Test of Ion Thruster

Abstract

The invention discloses a beam target for an ion thruster ground test. With the beam target of the invention adopted, pollution caused by sputtered sediments generated in an ion thruster ground ignition test can be effectively decreased, and sputtered sediments on the beam target can be cleaned with easiness, and the beam target is convenient to use. The beam target of the invention comprises a temperature measuring component, a high-purity graphite target surface, a heat absorbing target body, an insulation supporting column, a reflecting screen and a heating body; the inner surface of the heat absorbing target body is an arc-shaped surface; a plurality of rectangular high-purity graphite blocks are spliced with one another so as to form the high-purity graphite target surface; the high-purity graphite blocks are flatly laid on the inner surface of the heat absorbing target body; the heat absorbing target body is of a tubular fin structure; a heat-conducting medium is communicated with the interior of the tubular fin structure; the heat absorbing target body and the reflecting screen are installed at two ends of the insulation supporting column respectively; and the heating body is installed on the insulation supporting column. With the beam target of the invention adopted, sputtered materials caused by high-energy electronic sputtering can be effectively decreased; the target surface is of an arc-shaped structure, so that the sputtered materials can be deposited near the beam target, and therefore, sediments which are returned to the surface of the ion thruster can be decreased, and the service life of the ion thruster can be prolonged.

Description

technical field [0001] The invention relates to the technical field of ion thrusters, in particular to a beam target for ground tests of ion thrusters. Background technique [0002] The ground life test of the ion thruster needs to be carried out in a vacuum chamber. The ions in the ion thruster beam have high energy (above keV). These high-energy ions collide with the vacuum chamber wall to produce sputtering, even if there is only a small amount of sputtered matter Moving to the vicinity of the thruster and depositing on the thruster, long-term accumulation of deposition will also have a non-negligible impact on the working life of the thruster. The working life of the ion thruster is generally required to be as long as tens of thousands of hours. During ground verification, one of the technical problems that needs to be solved is how to effectively reduce the back sputtering deposition on the surface of the thruster and reduce the impact of back sputtering deposition. At ...

AI Technical Summary

Problems solved by technology

[0002] The ground life test of the ion thruster needs to be carried out in a vacuum chamber. The ions in the ion thruster beam have high energy (above keV). These high-energy ions collide with the vacuum chamber wall to produce sputtering, even if there is only a small amount of sputtered matter Moving to the vicinity of the thruster and depositing on the thruster, long-term accumulation of deposition will also have a non-negligible impact on the working life of the thruster

Images