Near space plasma sheath environment ground simulation device and diagnosis method

Abstract

The invention provides 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, and belongs to the technical field of near space environment ground simulation and diagnosis. The problem that an existing near space high-speed target plasma sheath ground simulation technology for a ground experiment cannot achieve real simulation is solved. According to the simulation device, a plasma beam generation system is connected with one end of a vacuum system, a target bluff body system is arranged on a target bluff body movement supporting system in a microwave darkroom system, and the target bluff body system and the plasma beam generation system are equal in height and concentrically aligned. The target bluff body movement supporting system is arranged on a guide rail in the microwave darkroom system, and the plasma diagnosis system comprises a hydrogen cyanide laser interferometer, a probe diagnosis mechanism and a spectrum diagnosis mechanism. The device 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 ground simulation device and a diagnosis method for a high-speed target plasma sheath environment near space. Background technique [0002] When a superb or reentry vehicle flies in the adjacent space (20-100km) at a speed exceeding Mach 5, due to the intense 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 vehicle Sheath, the plasma sheath is composed of a large number of particles, including electrons, ions and neutral molecules, and its density usually exceeds 10 18 m -3 , high-density plasma will attenuate the electromagnetic wave signal for communication, forming an electromagnetic communication blackout phenomenon. When the radar detects a high-speed aircraft, the return signal will be reduced or e...

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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