Pulsed microwave-driven argon plasma jet with distinctive plume patterns resonantly excited by surface plasmon polaritons

• 作者: A. A. Kudryavtsev 刘明海 夏广庆 殷志祥 洪伶俐 胡业林 胡希伟 陈兆权
• 来源期刊: 中国物理B（英文版）
• 关键词: pulsed microwave discharge surface plasmon polaritons atmospheric argon cold plasma jet dis-tinctive plasma plume patterns
• 年，卷（期）: 2015,（2）
• 页码范围: 025203-1-025203-11
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/2/025203

摘要

Atmospheric lower-power pulsed microwave argon cold plasma jets are obtained by using coaxial transmission line resonators in ambient air. The plasma jet plumes are generated at the end of a metal wire placed in the middle of the dielec-tric tubes. The electromagnetic model analyses and simulation results suggest that the discharges are excited resonantly by the enhanced electric field of surface plasmon polaritons. Moreover, for conquering the defect of atmospheric argon filamentation discharges excited by 2.45-GHz continued microwave, the distinctive patterns of the plasma jet plumes can be maintained by applying different gas flow rates of argon gas, frequencies of pulsed modulator, duty cycles of pulsed microwave, peak values of input microwave power, and even by using different materials of dielectric tubes. In addition, the emission spectrum, the plume temperature, and other plasma parameters are measured, which shows that the proposed pulsed microwave plasma jets can be adjusted for plasma biomedical applications.