A Uniform Electromagnetic Field Device for Plasma Velocity Screening Instrument

Abstract

The invention discloses a uniform electromagnetic field device for a plasma velocity screening instrument. The sensor comprises a first ceramic plate, a second ceramic plate, a first magnetic pole plate, a second magnetic pole plate, a first magnetic pole plate gasket, a second magnetic pole plate gasket, a first electrode plate, a second electrode plate, a first electrode plate insulating block,a second electrode plate insulating block, a first electrode plate adapter, a second electrode plate adapter and a shell. By means of the technical scheme, the relative position precision is kept reasonable, and installation precision and machining performance are met. A special concave circular electric field structure is adopted; a uniform electric field and a uniform magnetic field are providedfor the interior of the plasma speed screening instrument, , the electric field distribution in the center area is relatively uniform and the electric field intensity is gradually reduced in the direction from the center to an electrode plate under a narrow and long electric field structure with the limited width, and a uniform electromagnetic field channel can be provided for the plasma speed screening instrument.

Description

technical field [0001] The invention belongs to the field of electric propulsion plasma measurement, and in particular relates to an ion velocity selector for deflecting and velocity screening measurement of ion thruster beam plasma by using a contact measurement method. Background technique [0002] Electric propulsion is a kind of advanced propulsion method that uses electric energy to directly heat the propellant or ionizes and accelerates the propellant to obtain propulsion power. It has high specific impulse, thrust and efficiency. It has broad application prospects in space missions such as space navigation and interstellar navigation. [0003] The ion thruster is a kind of electrostatic electric thruster, which has been widely used in the main propulsion system of satellites and deep space probes. [0004] It is of great significance to measure the relevant parameters of the beam plasma of the ion thruster to optimize the design of the engine and improve the performa...

AI Technical Summary

Problems solved by technology

The ion velocity selector is one of the basic test methods for measuring the plasma energy distribution. It belongs to the contact measurement method and has the advantages of high measurement accuracy and strong ability to screen ions. However, there are higher requirements for the uniformity of the electromagnetic field inside the instrument. At present, there is no velocity selector specially designed for the beam region of the ion thruster. The main reason is that there is a technical bottleneck in the design of the uniform electromagnetic field structure.

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