Low temperature, atmospheric pressure, direct current microplasma jet operated in air, nitrogen and oxygen

被引：0
作者：
A.-A.H. Mohamed
J. F. Kolb
K. H. Schoenbach
机构：
[1] Faculty of Science,Department of Physics
[2] Taibah University,Physics Department
[3] Faculty of Science,undefined
[4] Beni-Suef University,undefined
[5] Frank Reidy Research Center for Bioelectrics,undefined
[6] Old Dominion University,undefined
来源：
The European Physical Journal D | 2010年 / 60卷
关键词：
Discharge Current; Critical Reynolds Number; Thick Alumina Layer; Plasma Needle; Anode Hole;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Micro-plasma jets in atmospheric pressure molecular gases (nitrogen, oxygen, air) were generated by blowing these gases through direct current microhollow cathode discharges (MHCDs). The tapered discharge channel, drilled through two 100 to 200 μm thick molybdenum electrodes separated by a 200 μm thick alumina layer, is 150 to 450 μm in diameter in the cathode and has an opening of 100 to 300 μm in diameter in the anode. Sustaining voltages are 400 to 600 V, the maximum current is 25 mA. The gas temperature of the microplasma inside the microhollow cathode varies between ~2000 K and ~1000 K depending on current, gas, and flow rate. Outside the discharge channel the temperature in the jet can be reduced by manipulating the discharge current and the gas flow to achieve values close to room temperature. This cold microplasma jet can be used for surface treatment of heat sensitive substances, and for sterilization of contaminated areas.
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页码：517 / 522
页数：5
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