Multistage ionization rotating magnetic field acceleration spiral wave plasma source

Abstract

The invention discloses a multistage ionization rotating magnetic field acceleration spiral wave plasma source, and the plasma source uses spiral wave discharge plasma as a plasma first-order ionization source, uses a multistage stepped contraction ionization structure, and uses a magnetic confinement structure and a rotating magnetic field acceleration structure to accelerate the plasma. According to the invention, the ionization rate and the plasma density of a plasma source propellant are improved through the multi-step ionization technology; the magnetic confinement and rotating magnetic field acceleration structure is used for accelerating the plasma, and the ejection speed of the plasma is increased; in addition, the overall structural design does not need discharge electrodes, neutralizers and other parts which are prone to corrosion and seriously restrict the service life of the plasma source, and then the performance and the service life of the plasma source are improved.

Description

technical field [0001] The invention belongs to the field of plasma sources, and in particular relates to a plasma that uses helicon discharge plasma as the first-order ionization source, uses a multi-level stepped contraction ionization structure, and uses a magnetic confinement structure and a rotating magnetic field acceleration structure to accelerate the plasma. A multi-stage ionizing rotating magnetic field accelerates a helicon wave plasma source. Background technique [0002] The helicon wave plasma source is a device that can efficiently convert radio frequency wave energy into high-density plasma through an antenna system without electrode contact. It has a variety of propellants (oxygen-enriched gas or air), no electrodes (long life), high ionization rate (nearly 100% in the central area), high density (10 17 -10 20 m -3 ), low magnetic field confinement (<0.1T), high controllability (multi-mode operation), and other significant advantages, it is very suitab...

AI Technical Summary

Problems solved by technology

The use of ion cyclotron resonance acceleration requires a super-strong magnetic field structure, which greatly increases the complexity of the system, and its resonance effect is uncertain and difficult to evaluate

Second-order helicon wave plasma sources that use electrostatic grid acceleration or Hall electromagnetic acceleration require cathodes, neutralizers and other components that are easily corroded and severely restrict the life of the plasma source. Moreover, the processing accuracy of the electrostatic grid is high, and the grid is prone to appear. The problem of short circuit and sputter corrosion, greatly reducing the service life of the plasma source

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