Abstract A plasma jet has been developed which operates using radio frequency (rf) power and produces a stable homogeneous discharge at atmospheric pressure. Its discharge characteristics, especially the dependence of stable discharge operating range on the feed gas, were studied, and the electric parameters such as RMS current, RMS voltage and reflected power were obtained with different gas flows. These studies indicate that there is an optimum range of operation of the plasma jet for a filling with a gas mixture of He and O$_2$. Two "failure" modes of the discharge are identified. One is a filamentary arc when the input power is raised above a critical level, another is that the discharge disappears gradually as the addition of O$_2$ approaches 3.2%. Possible explanations for the two failure modes have been given. The current and voltage waveform measurements show that there is a clear phase shift between normal and failure modes. In addition, I-V curves as a function of pure helium and for 1% addition of oxygen have been studied.
Received: 20 May 2003
Revised: 10 October 2003
Accepted manuscript online:
Wang Shou-Guo (王守国), Li Hai-Jiang (李海江), Ye Tian-Chun (叶甜春), Zhao Ling-Li (赵玲利) Basic characteristics of an atmospheric pressure rf generated plasma jet 2004 Chinese Physics 13 190
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.