title: An atmospheric-pressure, high-aspect-ratio, cold micro-plasma.
abstract: An atmospheric pressure nonequilibrium Ar micro-plasma generated inside a micro-tube with plasma radius of 3 μm and length of 2.7 cm is reported. The electron density of the plasma plume estimated from the broadening of the Ar emission line reaches as high as 3 × 10(16) cm(-3). The electron temperature obtained from CR model is 1.5 ev while the gas temperature of the plasma estimated from the N2 rotational spectrum is close to room temperature. The sheath thickness of the plasma could be close to the radius of the plasma. The ignition voltages of the plasma increase one order when the radius of the dielectric tube is decreased from 1 mm to 3 μm.
authors.affiliation: 1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P.R. China [2] IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, P.R. China.
authors.forename: X
authors.initials: X
authors.lastname: Lu
authors.affiliation: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P.R. China.
authors.forename: S
authors.initials: S
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P.R. China.
authors.forename: J
authors.initials: J
authors.lastname: Gou
authors.affiliation: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P.R. China.
authors.forename: Y
authors.initials: Y
authors.lastname: Pan