Testing system and method for ultrahigh sound velocity two-dimensional plasma sheath

Abstract

The invention provides a testing system and method for an ultrahigh sound velocity two-dimensional plasma sheath, and is used for measuring electromagnetic scattering parameters of the ultrahigh soundvelocity plasma sheath. The system comprises a plasma generator, an antenna, a vector network analyzer, a programmable power system and a plasma density diagnosis system. The method comprises the following steps: arranging the plasma generator of the ultrahigh sound velocity plasma sheath on a rotary table; arranging the 1-8 GHz antenna on one side of the generator; calibrating the antenna through the vector network analyzer; recording and processing emitted and received signals of the antenna through a port, so as to obtain scattering parameters; diagnosing plasma produced in the plasma generator through a spectrograph; and controlling plasma related important parameters through a computer. The system fills the gap of the measurement of parameters of the ultrahigh sound velocity two-dimensional plasma sheath, provides an experimental evidence for the research of plasma sheath electromagnetic simulation, and lays a foundation for exploration and solving the problem of communication blackout of aircrafts.

Description

technical field [0001] The invention relates to microwave testing technology, in particular to a super-high-speed two-dimensional plasma sheath, which is mainly used for simulation testing of the super-high-speed aircraft plasma sheath, and provides a basis for solving the "black barrier" problem. Background technique [0002] Plasma is the fourth state that exists in addition to the liquid, solid, and gaseous states of matter. When the neutral gas is reacted in some physical or chemical way by the high energy of nature, these neutral gases become a mixture composed of many electrons, positively charged particles and neutral atoms. In recent years, whether it is manned spacecraft returning to the earth to enter the atmosphere, hypersonic weapons re-entering orbit, or low-scattering aircraft actively using plasma materials for wave absorption, etc., these situations are related to the propagation, attenuation, and reflection characteristics of electromagnetic waves in plasma....

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Problems solved by technology

[0010] In short, previous studies on the interaction between plasma and electromagnetic waves mainly focused on simulation. Although there is a certain basis for the research on the characteristics of plasma materials, there are not many demonstration and verification systems for the target and plasma to conform to the model. Experimental test verification to tune properties of plasmonic materials in real time involves less

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