Influence of Discharge Current on the Parameters of Plasma Supported by a Hollow Rectangular Cathode

IF 0.7 4区 化学 Q4 SPECTROSCOPY
A. V. Bernatskiy, I. I. Draganov, V. V. Lagunov, A. Kh. Sadurni Sorokin, V. N. Ochkin
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引用次数: 0

Abstract

The plasma glow intensity (I), the electron energy distribution function (EEDF), the electron concentration (Ne), and the average electron energy (〈u〉) were measured as functions of the discharge current and the measurement location in a hollow cathode discharge. The EEDF shape near the hollow cathode was found to depend significantly on the discharge current. It exhibited a bi-Maxwellian shape at a current of 50 mA. A local maximum in the EEDF, the position and amplitude of which changed with increasing discharge current, appeared as the current increased. These changes led to a linear increase in the average electron energy. The electron concentration increased linearly with current changes from 50 to 200 mA, after which the value of Ne ceased to depend on the discharge current in the range 200–450 mA. The glow intensities of individual He atomic lines depended linearly on the discharge current.

放电电流对空心矩形阴极支撑等离子体参数的影响
测量了空心阴极放电中等离子体发光强度(I)、电子能量分布函数(EEDF)、电子浓度(Ne)和平均电子能量(< u >)随放电电流和测量位置的变化规律。发现空心阴极附近的EEDF形状与放电电流有很大关系。它在50毫安电流下呈现双麦克斯韦形状。随着放电电流的增大,EEDF出现局部最大值,其位置和幅度随放电电流的增大而变化。这些变化导致平均电子能量呈线性增长。在50 ~ 200 mA范围内,随着电流的变化,电子浓度呈线性增加,此后在200 ~ 450 mA范围内,Ne的值不再依赖于放电电流。单个He原子线的发光强度与放电电流呈线性关系。
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来源期刊
CiteScore
1.30
自引率
14.30%
发文量
145
审稿时长
2.5 months
期刊介绍: Journal of Applied Spectroscopy reports on many key applications of spectroscopy in chemistry, physics, metallurgy, and biology. An increasing number of papers focus on the theory of lasers, as well as the tremendous potential for the practical applications of lasers in numerous fields and industries.
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