Capacitively-coupled rf discharge with a large amount of microparticles: spatiotemporal emission pattern and microparticle arrangement

Abstract

The effect of micron-sized particles on a low-pressure capacitively-coupled rf discharge is studied both experimentally and using numerical simulations. In the laboratory experiments, microparticle clouds occupying a considerable fraction of the discharge volume are supported against gravity with the help of the thermophoretic force. The spatiotemporally resolved optical emission measurements are performed with different arrangements of microparticles. The numerical simulations are carried out on the basis of a one-dimensional hybrid (fluid-kinetic) discharge model describing the interaction between plasma and microparticles in a self-consistent way. The study is focused on the role of microparticle arrangement in interpreting the spatiotemporal emission measurements. We show that it is not possible to reproduce simultaneously the observed microparticle arrangement and emission pattern in the framework of the considered one-dimensional model. This disagreement is discussed and attributed to two-dimensional effects, e.g., radial diffusion of the plasma components.

References in corpus (9)

• Simulation benchmarks for low-pressure plasmas: capacitive discharges
• Gravity compensation in complex plasmas by application of a temperature gradient
• Ionization by bulk heating of electrons in capacitive radio frequency atmospheric pressure microplasmas
• Simple estimation of thermodynamic properties of Yukawa systems
• Practical expressions for the internal energy and pressure of Yukawa fluids
• Ion sphere model for Yukawa systems (dusty plasmas)
• On the heterogeneous character of the heartbeat instability in complex (dusty) plasmas
• Accurate momentum transfer cross section for the attractive Yukawa potential
• Moment fluid equations for ions in weakly-ionized plasma

Cited by in corpus (5)

• Interaction of a supersonic particle with a three-dimensional complex plasma
• Dim and bright void regimes in capacitively-coupled RF complex plasmas
• Heartbeat instability as auto-oscillation between dim and bright void regimes
• Ionization equation of state for the dusty plasma including the effect of ion--atom collisions
• On the optical measurement of microparticle charge using quantum dots