Gas heating and plasma expansion in pulsed microwave-excited microplasmas. (10th August 2015)

• Record Type: Journal Article
• Authors: Hoskinson, Alan R; Yared, Alexander; Hopwood, Jeffrey
• Is Part Of: Plasma sources science & technology. Volume 24:Number 5(2015:Oct.)
• Publication Date: 2015-08-10
• Subjects: microplasma -- gas heating -- microwave; Plasma (Ionized gases) -- Periodicals; 530.44
• DOI: 10.1088/0963-0252/24/5/055002
• Languages: English
• ISSNs: 0963-0252

Abstract

Abstract: Microwave resonators are used to generate microplasmas in atmospheric-pressure argon and helium. We present observations of the transient behavior of a microplasma after a fast increase in power, including time-resolved photography and spectroscopic gas temperature measurements. The results show that in argon both plasma filamentation and gas heating continue out to millisecond time scales, while helium microplasmas reach steady-state conditions after a few microseconds.