Affiliation of Author(s):自动化学院

Journal:Plasma Processes Polym.

Abstract:With plasma penetration into a capillary and the assistant of an air DBD, an ac-driven Ar microplasma plume having a length of several cm is generated inside the capillary. The inner diameter of the capillary ranges from 4 to 100 µm. When the tube diameter decreases, the length of the microplasma plume decreases, and while the ignition voltage, the current density, and the electron density increase significantly. For the tube diameter of 9 µm, the current density and the electron density measured from the Stark broadening of Hα line reach as high as 109 A m−2 and 11 × 1016 cm−3, respectively. The microplasma plume is of high degree of ionization and remains non-thermal. Rather than monotonically increasing, the propagation velocity of the microplasma plume decreases and then keeps almost unchanged after the tube diameter reaches 20 µm. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

ISSN No.:1612-8850

Translation or Not:no

Date of Publication:2019-03-01

Co-author:Wu, Fei,Wu Fei,Liu, Chang,F70206388,Liu, Xueyuan,Chen, Yuxiu,Shao, Tao,Zhang Charles

Correspondence Author:Shuqun Wu