Plume transition from solid to hollow with increasing the bias value of a sinusoidal voltage applied to an argon plasma jet. Issue 4 (2nd February 2018)

• Record Type: Journal Article
• Authors: Li, Xuechen; Lin, Xiaotong; Wu, Kaiyue; Jia, Pengying; Dong, Lifang; Ran, Junxia
• Is Part Of: Plasma processes and polymers. Volume 15:Issue 4(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-02-02
• Subjects: bias -- gas diffusion -- hollow plume -- plasma jet -- solid plume -- streamers; Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.201700224
• Languages: English
• ISSNs: 1612-8850

Abstract

Abstract : In this paper, a detailed study is carried out on an argon plasma jet excited by a biased sinusoidal voltage. Results indicate that, with increasing the biased voltage from negative polarity to positive one, the resultant plume transits from solid to hollow. Through implementing fast photography, a plump guided bullet is found to propagate in the solid plume, in which a negative streamer mechanism is involved. However, a positive streamer mechanism is involved in the hollow plume. It behaves as a thin guided streamer starting out from the driven electrode end, which subsequently evolves into branching streamers propagating in the flow periphery. To investigate the formation mechanism of the two plumes, the intensity ratio of spectral lines is investigated. Abstract : A solid plume is usually generated in a plasma jet excited by a symmetric sinusoidal voltage. Besides the solid plume, a hollow plume is formed in an argon jet excited with a biased sinusoidal voltage. It is found that the solid plume transits into the hollow one with increasing the bias value of the voltage. Moreover, formation dynamics of the two plumes are investigated by fast photography.