真空 ›› 2021, Vol. 58 ›› Issue (5): 72-76.doi: 10.13385/j.cnki.vacuum.2021.05.12
冯杰, 成荣, 赵勇, 王彦龙, 王尚民, 张宏, 贾艳辉
FENG Jie, CHENG Rong, ZHAO Yong, WANG Yan-long, WANG Shang-min, ZHANG Hong, JIA Yan-hui
摘要: 为了验证接触器工作时发生振荡的主要区域,设计试验寻找接触器进入羽流工况的阈值条件,确认当“供气工质流量—放电电流”的比值超过10sccm/A时,接触器将会进入到羽流工作模式。在该区域中接触器将会发生较为剧烈的振荡,放电电压峰-峰值一般超过5V。经频谱分析(FFT),导致该放电不稳定性的原因是需要用较少供气工质产生较多放电电流时的电离不稳定性,这种不稳定性对应的频率分量约在1MHz左右,采用增加供气流量或者降低放电电流的方法可以有效地抑制该种振荡的发生。
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