Device and method for generating large-area, uniform and non-magnetized plasmas

Abstract

The invention belongs to the field of gas discharge plasmas and relates to a device for generating the plasmas through gas discharge, in particular to a device and a method for generating large-area, uniform and non-magnetized plasmas. The device is characterized by comprising a plasma generation cavity body, a vacuum device and a plasma power supply; the plasma generation cavity body comprises acylindrical cavity body and a net type discharge electrode; the net type discharge electrode is a hollow round net body, the outside diameter of which is less than the inside diameter of the cylindrical cavity body; the net type discharge electrode and the cylindrical cavity body are connected to form a concentric circle structure through an insulated support; an observing window and a hinge window are connected and fixed at two ends of the cylindrical cavity body; and the device can be used for researching the influence of the plasmas on electromagnetic waves. By overcoming the disadvantagesof the prior art, the device and the method for generating the large-area, uniform and non-magnetized plasmas, which are good in repetitiveness, low in error and sustainable, are provided.

Description

technical field [0001] The invention belongs to the field of gas discharge plasma, and relates to a device for generating plasma by gas discharge. Specifically, it is a device and method for generating large-area uniform non-magnetized plasma, which can be used to study the influence of plasma on electromagnetic waves. Background technique [0002] Studying the propagation characteristics of electromagnetic waves in plasma and the interaction between plasma and electromagnetic waves is the basis and key content of research work such as spacecraft reentry, ionosphere research, and plasma stealth technology. The general research methods include computer simulation analysis and real plasma experiment, and computer simulation analysis is also based on real plasma experiment. [0003] Designing a plasma generating device on the ground is the basis of real plasma experiments. The existing methods for generating plasma on the ground mainly include shock tubes, arc wind tunnels, pla...

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Problems solved by technology

[0004] 1. The plasma electron density generated by the shock tube is high, but the generation time is very short, and the experiment is difficult to repeat

[0005] 2. The plasma temperature generated by the arc wind tunnel and plasma jet flame has high temperature ablation on the antenna, and the plasma contains metal ions, which causes experimental errors in electromagnetic wave transmission

[0006] 3. The density and distribution of plasma electrons generated by shock tubes, arc wind tunnels, and plasma jets are difficult to control

[0007] 4. The main method of using glow discharge to generate plasma to study its influence on electromagnetic waves is the ICP discharge method. Because there is high-frequency modulation in the plasma generated by ICP discharge, it is magnetized plasma, which will cause experimental errors in electromagnetic wave transmission. , and the electrode of ICP discharge exists in the plasma, which will cause experimental errors in electromagnetic wave transmission

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