A one-dimensional kinetic theory of sheaths surrounding planar, electron-emitting surfaces is presented which accounts for plasma electrons lost to the surface and the temperature of the emitted electrons. It is shown that ratio of plasma electron temperature to emitted electron temperature significantly affects the sheath potential when the plasma electron temperature is within an order of mag...

Multifluid simulations of plasma sheaths are increasingly used to model a wide variety problems in physics ranging from global magnetospheric flows around celestial bodies plasma-wall interactions thrusters and fusion devices. For multifluid problems, accurate boundary conditions an absorbing wall that resolves classical sheath remains open research area. This work justifies the use vacuum for ...

Electromagnetic plasma waves in the ion cyclotron range of frequencies (ICRF) are routinely used in magnetic fusion experiments to heat plasmas and drive currents. However, many experiments have revealed that wave energy losses in the plasma edge and at the wall are significant, and detected that the acceleration of ions into the walls due to the formation of radio-frequency (RF) sheaths is one...

Equilibrating gravitation by electric forces, microparticles can be confined in the plasma sheath above suitably biased local electrodes. Their position depends on the detailed structure of the plasma sheath and on the charge that the particles acquire in the surrounding plasma, that is by the electron and ion currents towards it. Bias switching experiments reveal how the charge and equilibrium...

Plasma-surface interactions in the presence of strong secondary electron emission (SEE) have been theoretically studied in the context of numerous plasma applications such as diverters, surface discharges, dusty plasmas, plasma thrusters, and plasma processing. The electron flux to the wall is determined by the electron velocity distribution function (EVDF) and by the sheath potential, which ar...

Electron emission from the boundary is ubiquitous in a capacitively coupled plasma (CCP) and precipitates nonnegligible influence on discharge properties. Here, we present Particle-in-Cell/Monte Carlo Collision simulation of an Ohmic-dominant heating mode plasma, where stochastic vanishes only Ohmic sustains due to sheath inversion by electron emission. The inverted CCP features negative potent...

A collision-less, one-dimensional kinetic model was developed to describe the potential profile within a plasma sheath in contact with an anode surface where the anode emits ions into the plasma. Solutions are presented in normalized form, describing a wide range of emitted ion currents and bulk plasma parameters. The neutralization parameter was found to not directly correlate to plasma neutra...

The plasma sheath, a thin layer having sharp gradients, is necessary to be formed at any material wall in exposure with for its stability. Characteristics of magnetized sheath front different permittivity medium has been studies using the kinetic trajectory simulation (KTS) model. electron density, ion electric field and potential decreases on moving away from entrance but total charge density ...

Sustaining a plasma in a magnetron discharge requires energization of the plasma electrons. In this work, Ohmic heating of electrons outside the cathode sheath is demonstrated to be typically of the same order as sheath energization, and a simple physical explanation is given. We propose a generalized Thornton equation that includes both sheath energization and Ohmic heating of electrons. The s...