Plasma sheath ground simulation electromagnetic experiment device and using method

A plasma and ground simulation technology, applied in the direction of plasma and electrical components, can solve the problems of unfavorable electromagnetic experiments, poor experiment repeatability, serious electromagnetic wave reflection, etc., to reduce background electromagnetic wave reflection, achieve continuous and stable control, and improve reliability. Effect
CN112333909AActive Publication Date: 2021-02-05XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XIDIAN UNIV
Publication Date
2021-02-05

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Abstract

The invention discloses a plasma sheath ground simulation electromagnetic experiment device and an application method, and the experiment device comprises a plasma generator, a spray pipe and a plasmadiagnosis system; the plasma generator is used for ionizing a neutral gas to generate high-temperature plasma; the spray pipe is used for accelerating the plasma by utilizing an aerodynamic principleand shaping the cross section of the plasma jet flow in a vacuum dark chamber; and the plasma diagnosis system is used for diagnosing the electron density of the plasma jet flow in real time througha non-contact method and feeding back the electron density to a comprehensive controller, and the comprehensive controller compares the actually measured electron density with a preset electron density value, and the power supply output power of the plasma generator is adjusted through feedback to realize continuous and stable control of the electron density of plasma jet. The plasma jet flow generated by the invention is stable and controllable, the electron density range is wide, the collision frequency range is wide, the length is large, the components are pure, and the regulation and control of the non-uniform distribution of the plasma electron density can be realized.
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Description

technical field

[0001] The invention belongs to the technical field of electromagnetic measurement, and relates to a plasma sheath ground simulation electromagnetic experiment device and a use method. Background technique

[0002] When the aircraft is flying at a high speed above Mach 5 in the adjacent space, the aerodynamic heating effect will ionize the air to form a plasma sheath covering the aircraft. The plasma sheath is composed of a large number of free electrons, positive ions and neutral molecules. , it will attenuate the electromagnetic wave signal, and in severe cases, it will cause a communication blackout phenomenon. When the radar detects a high-speed aircraft, the echo signal will be reduced or distorted due to the existence of the plasma sheath. In order to carry out electromagnetic experiments under the plasma sheath on the ground, it is necessary to generate a plasma jet with pure components, long time, wide range of electron density and collision frequency...

Claims

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