交流单针-板介质阻挡放电等离子参数空间分布研究  

Study of Plasma Parameter Distribution in Alternating Current Needle to Plate Dielectric Barrier Discharge

作　　者：李永辉[1] 董丽芳[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《光学学报》2014年第4期268-272,共5页Acta Optica Sinica

基　　金：国家自然科学基金(10975043;11175054);河北省自然科学基金(A2010000185);廊坊市科技局项目(2012011021;2012011030;2012011026)

摘　　要：通过氩气和空气中交流针-板介质阻挡放电的光谱,研究了在外加电压正半周流注放电的等离子发光强度、谱线宽度、电场强度在放电通道内从针到板的空间分布情况,分析了介质板的存在对等离子参量空间分布的影响。通过对氩气放电光谱中763nm和772nm两条谱线强度研究发现,沿着放电通道从针到板等离子发光强度在针尖附近先增大后减小,在平板电极附近又迅速增大。通过研究氩气放电中696.54nm谱线的展宽发现,谱线宽度在平板电极附近最大。通过空气放电光谱中氮分子离子线(391.4nm)和氮分子谱线(394nm)的强度比,计算了放电通道中电场强度的分布,发现沿着放电通道从针到板电场强度先减小后增大。研究发现,介质板的存在对于放电等离子参数的空间分布有着重要影响。The optical emission spectra are measured during the positive half cycle in a sinusoidal driven needle to plate dielectric barrier discharge in argon andair, and the spatial distributions from needle to plate in the discharge channel of plasma luminous intensity, spectrum width and electric field intensity are investigated. The effect of the dielectric plate on the plasma parameters is also analyzed. According to the intensities of two lines of 763 nm and 772 nm of argon discharge specrtrum, it is found that the intensity from needle to plate increases first and then decreases around the neadle, while it increases rapidly around the plate. The distribution of spectrum width （696.54 nm） is investigated, and the spectrum width increases to maximum around the plate. The distribution of electric field is obtained by calculating the intensity ratio of the nitrogen molecular ion line of 391.4 nm to nitrogen molecular line of 394 nm in air discharge spectrum, the electric field strength decreases first and then increases along the discharge channel. The results show that the dielectric plate playes an important role in the distribution of plasma parameter.

关 键 词：光谱学 等离子光谱 针-板放电 谱线宽度 电场强度 

分 类 号：O461.2[理学—电子物理学] O433.4[理学—物理]