点击次数：

论文类型：期刊论文

发表时间：2013-11-01

发表刊物：CHINESE PHYSICS B

收录刊物：SCIE、EI、ISTIC、Scopus

卷号：22

期号：11

ISSN号：1674-1056

关键字：mode transition; inductively coupled plasma; hairpin probe; hydrogen

摘要：Changes of the electron dynamics in hydrogen (H-2) radio-frequency (RF) inductively coupled plasmas are investigated using a hairpin probe and an intensified charged coupled device (ICCD). The electron density, plasma emission intensity, and input current (voltage) are measured during the E to H mode transitions at different pressures. It is found that the electron density, plasma emission intensity, and input current jump up discontinuously, and the input voltage jumps down at the E to H mode transition points. And the threshold power of the E to H mode transition decreases with the increase of the pressure. Moreover, space and phase resolved optical emission spectroscopic measurements reveal that, in the E mode, the RF dynamics is characterized by one dominant excitation per RF cycle, while in the H mode, there are two excitation maxima within one cycle.