A Ground Simulation Device and Diagnosis Method for Near Space Plasma Sheath Environment

Abstract

The invention proposes a high-density, strong collision, sub-wavelength, and non-uniform near-space plasma sheath ground simulation device and a microwave transmission measurement and plasma diagnosis method, belonging to the technical field of near-space environment ground simulation and diagnosis. It solves the problem that the existing near-space high-speed target plasma sheath ground simulation technology used for ground experiments cannot be truly simulated. The simulation device includes a plasma beam generation system connected to one end of the vacuum system, the target blunt body system is arranged on the target blunt body movement support system inside the microwave anechoic chamber system, and the target blunt body system and the plasma beam generation system are located at Equal height and concentric alignment, the target blunt body movement support system is arranged on the guide rail inside the microwave anechoic system, and the plasma diagnosis system includes a hydrogen cyanide laser interferometer, a probe diagnosis mechanism and a spectrum diagnosis mechanism. It is mainly used for near-space plasma sheath ground simulation and electromagnetic diagnosis.

Description

technical field [0001] The invention belongs to the technical field of near-space environment ground simulation and diagnosis, and in particular relates to a near-space high-speed target plasma sheath environment ground simulation device and a diagnosis method. Background technique [0002] When the super or re-entry vehicle is flying at a speed of more than Mach 5 in the near space (20-100km), due to the violent friction between the head of the aerodynamic vehicle and the air, the heating effect will ionize the surrounding air and form a layer of plasma on the surface of the aircraft. Sheath, the plasma sheath is composed of a large number of particles, including electrons, ions and neutral molecules, the density of which usually exceeds 10 18 m -3 , the high-density plasma will attenuate the electromagnetic wave signal for communication, forming a black barrier phenomenon of electromagnetic communication. When the radar detects a high-speed aircraft, the return signal wil...

AI Technical Summary

Problems solved by technology

However, the currently reported electromagnetic experiment system for ground simulation in the near space environment generally studies electromagnetic wave bands from one to tens of GHz, and usually does not consider signals under low frequency conditions (such as MHz)

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