<sec>During the re-entry process of aircraft, a layer plasma sheath wrapping its surface will be generated, which lead communication quality to deteriorate and even interrupt, resulting in phenomenon “radio blackout”. The blackout” problem has plagued aerospace industry for many years. One very important reasons is lack awareness transmission environment caused by limitations measurements...

This paper reviews some theoretical and computational aspects of plasma-wall interactions, in particidar the formation of sheaths. Some fundamental residts are derived analytically using a simple fluid model, and are subsequently tested with kinetic simulations. The various regions composing the plasma-wall transition (Debye sheath, colUsional and magnetic presheaths) are discussed in details.

A novel scheme that employs the use of an auxiliary discharge has been shown to reduce markedly anode sheath potentials in a transverse discharge. An 8.8 A low-pressure argon discharge in the presence of a transverse magnetic field was used as the plasma source in this study. In such discharges, the transverse flux that is collected by the anode is severely limited due to marked reductions in t...

As was already observed experimentally, the erosion of tungsten (W) coated graphite (C) tiles in ASDEX-Upgrade exhibit regular erosion patterns on the m rough surfaces who’s origin is not fully understood: Surfaces inclined towards the magnetic field direction show strong net W erosion while surfaces facing away from the magnetic field are shadowed from erosion and may even exhibit net W deposi...

Abstract A novel two-dimensional particle-in-cell code, named DESPICCO and developed at CNR-ISTP, is capable of simulating the thin plasma layer several millimeters, adjacent to divertor tiles a Tokamak fusion reactor. Here, kinetic effects non-neutral physics in Debye sheath can be self-consistently captured by Particle-in-Cell approach. The code firstly benchmarked against literature one-dime...