Method and structure for reducing primary electron loss in miniature ion electric thruster

Abstract

The invention discloses a method for reducing primary electron loss in a miniature ion electric thruster. The method for reducing the primary electron loss in the miniature ion electric thruster comprises the following steps of: taking an anode at a magnetic pole in a discharge chamber of the miniature ion electric thruster as a magnetic pole anode, taking the anode at the magnetic pole in the discharge chamber of the miniature ion electric thruster as a non-magnetic pole anode, enabling the magnetic pole anode and the non-magnetic pole anode to be independent of each other, and enabling the potential of the magnetic pole anode to be lower than the potential of the non-magnetic pole anode. A structure for reducing the primary electron loss in the miniature ion electric thruster comprises a first anode, a second anode, a third anode and a fourth anode which are sequentially and fixedly arranged on the discharge chamber of the miniature ion electric thruster from bottom to top; a first magnetic pole and a second magnetic pole are fixedly arranged on the discharge chamber of the miniature ion electric thruster from top to bottom; a gap is formed between the first magnetic pole and the second magnetic pole; the first magnetic pole is flush with the fourth anode; and the second magnetic pole is flush with the second anode. According to the method for reducing the primary electron loss in the miniature ion electric thruster, the loss of primary electrons at the magnetic pole can be effectively reduced.

Description

Technical field [0001] The present invention relates to the technical field of small ion thruster power, particularly, to a method and structure in micro-ion thruster primary electron loss is reduced. Background technique [0002] Generating a plasma in an ion thruster ionization refrigerant discharge chamber to accelerate ions in the plasma to produce thrust. The discharge chamber plasma thruster comprising a cathode, an anode, and three magnetic field components, in the discharge process, emitted by the cathode to the high energy primary electron discharge chamber, the primary electron is bound by a cusp magnetic field in the discharge chamber, the accelerating electric field in the the anode of the primary electron movement, in this process, the discharge chamber of the primary electron impact ionization occurs working fluid, and a low-energy electrons to produce two ions, the ions are accelerated to generate thrust discharged, and low-energy electron collisions at the magneti...

AI Technical Summary

Problems solved by technology

For conventional ion thrusters, high-energy primary electrons can fully collide with neutral atoms, the discharge loss is small, and the efficiency of the thruster is high. For miniature ion thrusters, the space of the discharge chamber is small, and a large number of primary electrons are directly in the Loss at the magnetic poles, large discharge loss, low efficiency of the thruster, and overheating of the anode, resulting in demagnetization of the permanent magnet and destruction of the magnetic field of the discharge chamber

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