Metal impurity fluxes and plasma-surface interactions in EXTRAP T2R

Surface Fluxes and Wind-Wave Interactions in Weak Wind Conditions

We will isolate a number of influences on air-sea transfer of momentum, heat, and moisture for weak wind conditions. We will focus on the important impact of swell amplitude and propagation direction and the explicit influence of large atmospheric eddies on the stability functions for the transfer coefficients for surface fluxes. Improved understanding of the various influences on sea surface f...

Fundamental Ion–surface Interactions in Plasma Thrusters

Ion thrusters offer the potential to enable many future interplanetary robotic missions presently under consideration by NASA. To realize the benefits offered by these low thrust devices, the sputtering mechanisms that are responsible for the degradation of thruster components over time must be well understood. Predictions of thruster life depend directly on the material removal rates from thru...

Properties of Magnetic Impurity in a Metal

The effect of a polarized conduction-electron cloud back on a magnetic impurity dissolved in a metal is studied. It is shown that at a temperature Tc much higher than the Kondo temperature the system becomes unstable against symmetry breaking and that a state with 〈Sz〉 6 = 0 is established. The behaviour of 〈Sz〉 is derived for all temperatures and magnetic fields except for a very narrow region...

Plasma-surface interactions of hydrogenated carbon

We present a review of our study of interactions of plasma particles (atoms, molecules) with hydrogenated amorphous carbon surfaces typical of plasma-facing divertor tiles and deposited layers in magnetic-fusion reactors. Our computer simulations of these processes are based on classical molecular dynamics simulations, using the best currently available multibody bond-order hydrocarbon potentia...

Molecular dynamics simulations for plasma-surface interactions