Near-field plume mass-spectroscopic diagnostic E*B probe based on Faraday cup

Abstract

The invention discloses a near-field plume mass-spectroscopic diagnostic E*B probe based on the Faraday cup and belongs to the technical field of plasma mass-spectroscopic diagnosis. The probe mainly applied to measuring near-field plumes of an ion thruster and of a Hall thruster comprises a central frame, ferrite permanent magnets, a flat electrode plate, an electrode plate holder, a collimator tube, a drift tube, a Faraday cup, six carbon steel shells and an anti-sputtering heat-insulating layer. According to the connectional relation, the central frame is used as a core part, the ferrite permanent magnets are distributed on upper and lower surfaces of the central frame, the electrode plate is fixed in the central frame, and an orthogonal electromagnetic field area is formed. The six carbon steel shells are used for packaging, and the front ends of the shells are coated with an anti-sputtering heat-insulating layer. The collimator tube of stainless steel and the drift tube are fitly fixed to the centers of two ends of the central frame through shaft holes. Ions different in valence are screened by adjusting voltage among the electrode plates, univalent and bivalent ion currents are acquired with the Faraday cup of aluminum, and the ratio of near-field plum bivalent ions is acquired by analytical computing.

Description

technical field [0001] The invention belongs to the technical field of plasma mass spectrometry diagnosis, and specifically refers to a mass spectrometer that utilizes the principle of a Wien velocity filter to separate ions with different charge numbers and uses a Faraday cylinder to collect ion currents. It is mainly used in electric propulsion research. Measure the ratio of divalent ions in the near-field plume of ion thruster and Hall thruster. Background technique [0002] Electric propulsion is a propulsion method that uses electric energy to heat or ionize the propellant to accelerate the working fluid to form a high-speed jet and eject it to generate thrust. The biggest feature of electric propulsion is small thrust, high specific impulse, high efficiency and long life, and it has broad application prospects in space missions such as orbit control of large spacecraft, deep space exploration and interstellar navigation. [0003] Ion thrusters and Hall thrusters are c...

AI Technical Summary

Problems solved by technology

At present, there is no E×B probe dedicated to the measurement of divalent ions in the near-field plume of ion thrusters and Hall thrusters.

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