Interferometry Diagnostics of Gas Temperature in a Discharge Sustained by Microwave Radiation from a 24-GHZ Gyrotron in an Argon Flow at Atmospheric Pressure

IF 0.7 4区 地球科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC
A. A. Murzanev, D. A. Mansfeld, N. V. Chekmarev, S. V. Sintsov, M. E. Viktorov, E. I. Preobrazhensky, A. V. Vodop’yanov
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引用次数: 0

Abstract

We study experimentally an atmospheric pressure discharge sustained by the millimeter-wave gyrotron radiation in an argon flow. The spatial distribution of gas temperature in the plasma jet emerging from the conical nozzle of a waveguide plasmatron has been measured by two independent methods. Using the method of optical interferometry and the method of thermosondes, it is shown that even with a microwave heating power of several tens of watts, it is possible to create a weakly ionized plasma at the nozzle exit, in which the gas temperature reaches about 1000 K and declines uniformly in the postdischarge area. The interferometric method applied in this work makes it possible to obtain an instantaneous complete spatial picture of the gas temperature distribution in the plasma torch during a single passage of a probing laser beam through the medium under study. This permits one to observe the complex dynamics of convective processes during the outflow of plasma and hot gas from the hole in the plasmatron.

大气压氩气流中24 ghz回旋管微波持续放电气体温度的干涉测量诊断
实验研究了氩气流中毫米波回旋管辐射持续的大气压放电。用两种独立的方法测量了波导等离子体发生器锥形喷嘴喷出的等离子体射流中气体温度的空间分布。利用光学干涉测量法和热感仪方法,表明即使在几十瓦的微波加热功率下,也可以在喷嘴出口处产生弱电离等离子体,其中气体温度达到1000 K左右,并在放电后均匀下降。在这项工作中应用的干涉测量方法使得在探测激光束通过所研究的介质时获得等离子炬中气体温度分布的瞬时完整空间图像成为可能。这使得人们可以观察等离子体和热气体从等离子体中的孔流出时对流过程的复杂动力学。
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来源期刊
Radiophysics and Quantum Electronics
Radiophysics and Quantum Electronics ENGINEERING, ELECTRICAL & ELECTRONIC-PHYSICS, APPLIED
CiteScore
1.10
自引率
12.50%
发文量
60
审稿时长
6-12 weeks
期刊介绍: Radiophysics and Quantum Electronics contains the most recent and best Russian research on topics such as: Radio astronomy; Plasma astrophysics; Ionospheric, atmospheric and oceanic physics; Radiowave propagation; Quantum radiophysics; Pphysics of oscillations and waves; Physics of plasmas; Statistical radiophysics; Electrodynamics; Vacuum and plasma electronics; Acoustics; Solid-state electronics. Radiophysics and Quantum Electronics is a translation of the Russian journal Izvestiya VUZ. Radiofizika, published by the Radiophysical Research Institute and N.I. Lobachevsky State University at Nizhnii Novgorod, Russia. The Russian volume-year is published in English beginning in April. All articles are peer-reviewed.
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