针一板介质阻挡放电中电子能量空间分布研究

测量了大气压环境下氩气空心针-板放电等离子体中原子与分子谱线强度的空间分布,分析了等离子体中电子能量的空间分布.实验利用空心针-板放电装置,得到了约3 cm长的放电等离子体弧.在300～800 nm范围内采集发射光谱,发现了强度较高的Ar I谱线、N2第二正带系谱线C 3Ⅱu(v=o)→B 3皿(v=0)以及强度较弱的...

Study on spatial distribution of electron energy in hollowneedle-plate dielectric barrier discharge

In the present work, the spatial distributions of spectrum intensity of molecule and atom in the plasma generated in hollowneedle-plate discharge in atmosphere were measured, and the spatial distribution of electron energy in plasma was analyzed. A plasma about 3 cm long is generated by using a hollowneedle-plate discharge device. By collecting optical emission spectrum from 300 to 800 nm, it was found that the spectrum consists of strong Ar I lines, strong second positive band system of N2, and weak OI line. The spatial distributions of spectrum intensity of Ar I (696.54, 763.51, 772.42, and 794.82 nm), band N2 (337.1, 357.6, and 380.4 nm), and OI 777.2 nm were measured. The Ar I lines decreased gradually from the arc root. The N2 lines increased gradually from the arc root and declined when they reached a maximum at 12 mm away from the arc root. The intensity of OI increased from the arc root and declined when it reached a maximum at 6 mm away from the arc root. The spatial distribution of electron energy in plasma was analyzed qualitatively from the spatial distribution of spectrum intensity given above. It was found that the electrons located at 6 mm away from the are root have high energy, while they have low energy at arc tip.