The spatial distribution of ion deposited energy is often assumed to linearly relate to the local ion-induced sputtering of atoms from a solid surface. This—along with the assumption of an ellipsoidal region of energy deposition—is the central mechanism used in the Bradley and Harper [J. Vac. Sci. Technol. A 6, 2390 (1988)] explanation of ion-induced surface instabilities, but it has never been...

The formation of the porous structure in dc magnetron sputtered amorphous silicon thin films at low temperatures is studied when using helium and/or argon as the processing gas. In each case, a-Si thin films were simultaneously grown at two different locations in the reactor which led to the assembly of different porous structures. The set of four fabricated samples has been analyzed at the mic...

Analysis of multiphoton ionization of metal atoms in the saturation regime using subpicosecond KrF laser pulses" (1998). C. Singly and multiply charged ion yield curves are reported for resonant and nonresonant two-photon-ionization processes for a collection of 31 metal atoms. The atoms are created by sputtering from a solid target using an Ar-ion gun. Single and multiple ionization of these a...

BiVO4 films were fabricated by radio frequency (RF) sputtering from a single target. The deposited found to be rich in Bi, and the reason for Bi-richness was investigated. It inferred Monte Carlo simulation that, during sputtering, transfer process of target atoms through argon gas played major role this phenomenon. resulted an imbalanced ratio Bi V, arising difference atom mass interaction rad...

Samples of duplex stainless steel SAF 2507 were low-temperature plasma nitrided to characterize separately, on the surface, behavior its ferrite and austenite phases in relation two competing processes, that is, one caused by enrichment nitrogen, resulting possible expansion, other removal superficial atoms via sputtering, which may lead retraction studied phases. Since these have different com...

[1] A three-dimensional Monte Carlo model of Mercury’s neutral sodium exosphere was used to describe correlation between the observed variations in the exospheric density and the variations in the surface concentration of sodium along Mercury’s motion around the Sun [Leblanc and Johnson, 2003]. Four processes of ejection were taken into account: thermal and photon stimulated desorptions, solar ...

Abstract Solar wind (SW) ion irradiation on airless bodies can play an important role in altering their surface properties and surrounding exosphere. Much of the sputtering data needed for exosphere studies come from binary collision approximation models such as TRansport Ions Matter its more recent extension, SDTrimSP. These predict yield energy distribution sputtered atoms, along with depth d...

Multi-photon resonance ionization, time-of-flight mass spectrometry and imaging techniques have been employed to measure the polar-angle, kinetic energy, and population distributions of Ni atoms desorbed from 5 keV Ar ion bombarded Ni{OOl}. The measured angleand energy-resolved intensity maps of the sputtering yield provide a set of data that can be used to examine the detailed interactions bet...

Particle deposition/erosion can affect mirrors used in plasma diagnostics and this is a major concern for future fusion reactors. This subject is analyzed for the first and second mirrors of the proposed Motional Stark Effect edge plasma current diagnostic for ITER. Particle fluxes to the diagnostic module aperture are given by edge-plasma/impurity-transport solutions for convective plasma flow...