电感耦合荧光灯环面等离子体的时间特性

Q4 Engineering
K. Misono
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引用次数: 0

摘要

研究了在电感耦合荧光灯中产生的低压汞氩环面等离子体。应用变压器模型分析了环面等离子体从点火阶段到稳定阶段的瞬态特性。功率传递效率在90%以上,耦合系数在0.75左右。环面等离子体的电流密度和电场强度与传统荧光灯的正极柱相当。采用有限元方法对等离子体中的相对电子密度分布进行了分析。将实验测定的平均电子密度与计算的电子填充系数相结合,估计了电子的绝对密度分布。稳态下的最大电子密度估计在1.5 × 10 12 cm−3左右,与双探针实验测定的电子密度几乎相等。放电大约用了一个小时才达到稳定状态。这可以用汞合金的汞运输来解释,汞合金被固定在一根长而窄的玻璃管的尖端,穿过激励线圈进入放电容器。本文所提出的分析技术有助于解释感应环面等离子体的时间特性以及等离子体与激励线圈之间的相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Temporal Characteristics of the Torus Plasma in an Inductively Coupled Fluorescent Lamp
Low-pressure mercury ‒ argon torus plasma generated in an inductively coupled fluorescent lamp was investigated. The tem poral characteristics of the torus plasma from the ignition stage to the stable stage were analyzed by applying the transformer model. The power transfer efficiency was found to be over 90%, and the coupling coefficient was around 0.75. The current density and the electric field strength of the torus plasma were comparable to those of the positive column of a conventional fluorescent lamp. The finite element method was used to analyze the relative electron density distribution in the plasma. The absolute density profile of the electron was estimated by combining the average electron density experimentally determined with the calculated filling factor of the electron. The maximum electron density estimated was around 1.5 × 10 12 cm − 3 in the steady state, nearly equal to that experimentally determined by the double probe. The discharge took about one hour to reach the steady state. This can be explained by the mercury transport from the amalgam, which was fixed at the tip of a long, narrow glass tube that penetrated the excitation coil to the discharge vessel. The analysis technique presented in this paper is useful to explain the temporal characteristics of inductive torus plasma as well as the interaction between the plasma and the excitation coil.
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来源期刊
Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi)
Journal of the Illuminating Engineering Institute of Japan (Shomei Gakkai Shi) Engineering-Electrical and Electronic Engineering
CiteScore
0.10
自引率
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发文量
6
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