Law V J, Milosavljević V, O'Connor N, Lalor J F, Daniels S
National Center of Plasma Science and Technology (NCPST), Dublin City University, Dublin 9, Ireland.
Rev Sci Instrum. 2008 Sep;79(9):094707. doi: 10.1063/1.2988833.
The development of a handheld single and triple chamber atmospheric pressure coaxial dielectric barrier discharge driven by Flyback circuitry for helium and argon discharges is described. The Flyback uses external metal-oxide-semiconductor field-effect transistor power switching technology and the transformer operates in the continuous current mode to convert a continuous dc power of 10-33 W to generate a 1.2-1.6 kV 3.5 micros pulse. An argon discharge breakdown voltage of approximately 768 V is measured. With a 50 kHz, pulse repetition rate and an argon flow rate of 0.5-10 argon slm (slm denotes standard liters per minute), the electrical power density deposited in the volume discharge increases linearly at a rate of 75+/-20% mW/cm(3) per 1 slm of gas. Electrical power transfer efficiency between the secondary Flyback coil and the discharge volume increases from 0.1% to 0.65%. Neutral argon gas forced convection analysis yields a similar energy loss rate to the electrical discharge process. Optical emission spectroscopy studies of the expanding discharge plume into ambient air reveal that the air climatically controls the plume chemistry to produce an abundance of neutral argon atoms and molecular nitrogen.
描述了一种由反激电路驱动的手持式单腔和三腔大气压同轴介质阻挡放电装置的开发，用于氦气和氩气放电。反激电路采用外部金属氧化物半导体场效应晶体管功率开关技术，变压器以连续电流模式运行，将10 - 33W的连续直流功率转换为产生1.2 - 1.6kV、3.5微秒的脉冲。测得氩气放电击穿电压约为768V。在50kHz的脉冲重复率和0.5 - 10氩气标准升每分钟（slm表示标准升每分钟）的氩气流速下，体积放电中沉积的电功率密度以每1slm气体75±20%mW/cm³的速率线性增加。反激次级线圈与放电气体之间的电功率传输效率从0.1%提高到0.65%。中性氩气强制对流分析得出与放电过程相似的能量损失率。对向周围空气中扩展的放电羽流进行的发射光谱研究表明，空气在气候上控制羽流化学过程，以产生大量中性氩原子和分子氮。
