摘要
为了研究提高无极灯光效的方法,本文测量了无极灯启动阶段的电参数和发射光谱,分析了点灯后阻抗、Hg原子光谱强度、Ar原子光谱强度、等离子体参数和放电模式随时间的变化规律。结果表明,在启动阶段,无极灯阻抗发生了升-降-升的变化;Hg原子谱线强度在某稳定位置附近做相对稳定的波动;Ar原子光谱强度迅速下降到某稳定值;电子浓度迅速下降到某稳定值,中能电子温度相对稳定;放电处于H型放电模式。这为进一步设计电子整流器和提高无极灯的光效奠定了基础。
The starting characteristics of the electrodeless lamps,such as the changes in lamp impedance,emission intensity of mercury and argon atoms,time evolution of the plasma parameters,and discharge mode after lamp ignition,were experimentally studied.The results show that the impedance of the lamp in the starting stage,first increases rapidly for a couple of seconds,then decreases less rapidly,and finally,increases slowly.We found that the Hg emission intensity fluctuates around a stable value;whereas Ar emission intensity rapidly drops to a constant.The electron density decreases,stabilizing somewhere;and the temperature of the middle energy electrons is fairly stable.We propose that the plasma may discharge in H-mode.Possible mechanism（s） was also tentatively discussed.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2011年第5期536-539,共4页
Chinese Journal of Vacuum Science and Technology
基金
国家自然科学基金项目(50477005)
中国博士后科学基金项目(20100480255)
清华大学校企合作项目(20102000442
20092000399)
关键词
无极灯
启动特性
阻抗
发射光谱
等离子体
Electrodeless lamp
Starting characteristics
Impedance
Emission spectrum
Plasma
