中国物理B ›› 2017, Vol. 26 ›› Issue (4): 45202-045202.doi: 10.1088/1674-1056/26/4/045202
• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇 下一篇
Xiang-Mei Liu(刘相梅), Rui Li(李瑞), Ya-Hui Zheng(郑亚辉)
Xiang-Mei Liu(刘相梅), Rui Li(李瑞), Ya-Hui Zheng(郑亚辉)
摘要: Physical qualities of dusty plasma in the pulsed radio-frequency C2H2/Ar microdischarges are carefully investigated by a one-dimensional hydrodynamic model and aerosol dynamics model. Since the thermophoretic force has a great effect on the nanoparticle density spatial distribution, the neutral gas energy equation is taken into accounted. The effects of pulse parameters (dust ratio, modulation frequency) on the nanoparticle formation and growth process are mainly discussed. The calculation results show that, as the duty ratio increases, the mode transition from the sheath oscillation (α regime) to the secondary electron heating (γ regime) occurred, which is quite different from the conventional pulsed discharge. Moreover, the effect of modulation frequency on the width of sheath and plasma density is analyzed. Compared with the H2CC- ions, the modulation frequency effect on the nanoparticles density becomes more prominent.
中图分类号: (Dusty or complex plasmas; plasma crystals)