Angular, energy, and mass distribution of sputtered particles

Höfer, Wolfgang

doi:10.1007/3540534288_16

Cited by 89 publications

(55 citation statements)

References 243 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The polar angle distribution of sputtered atoms, f (α), for polycrystalline surfaces is best described by a quadratic angular dependence, f (α) ∝ cos 2 α for laboratory experiments (Hofer, 1991). However, Cassidy and Johnson (2005), found recently that for the fine-grained and porous regolith a better choice is f (α) = cos α, which is used in our calculations.…”

Section: The Sputter Modelmentioning

confidence: 97%

The lunar exosphere: The sputtering contribution

Würz

Rohner

Whitby

et al. 2007

Icarus

157

174

View full text Add to dashboard Cite

Section: The Sputter Modelmentioning

confidence: 97%

The lunar exosphere: The sputtering contribution

Würz

Rohner

Whitby

et al. 2007

Icarus

157

174

View full text Add to dashboard Cite

“…The distributions are truncated, removing parts with low velocity and negative v z , in order to avoid very large densities building up near the surface. The neutral temperature was chosen to match the typical temperature of sputtered atoms, which is O(10 eV) [57]. This temperature is also used for neutral evaporation, where the elevated temperature causes the neutrals to leave the injection region quickly, maintaining numerical stability in the grids near the surface.…”

Section: Particle Injectionmentioning

confidence: 99%

From Field Emission to Vacuum Arc Ignition: A New Tool for Simulating Copper Vacuum Arcs

Timkó

Sjøbak

Mether

et al. 2015

Contrib. Plasma Phys.

View full text Add to dashboard Cite

Understanding plasma initiation in vacuum arc discharges can help to bridge the gap between nano-scale triggering phenomena and the macroscopic surface damage caused by vacuum arcs. We present a new twodimensional particle-in-cell tool to simulate plasma initiation in direct-current (DC) copper vacuum arc discharges starting from a single, strong field emitter at the cathode. Our simulations describe in detail how a sub-micron field emission site can evolve to a macroscopic vacuum arc discharge, and provide a possible explanation for why and how cathode spots can spread on the cathode surface. Furthermore, the model provides us with a prediction for the current and voltage characteristics, as well as for properties of the plasma like densities, fluxes and electric potentials in a simple DC discharge case, which are in agreement with the known experimental values.

show abstract

“…The number of extracted particles for a single impacting ion , ion sputtering generally is a multi-step process: back-scattering of the ion over a surface target, and collision cascade producing the ejection of surface atoms reproducing more or less its local composition on atomic level (e.g. : [11,12,39]) in most cases, the ejected particles are neutrals [7]. The energy transmitted in the collision usually peaks at few eV and extends up to more than 100 eV [31,32], and can be empirically reproduced (Fig.…”

Section: Lunar Exospheric Modelmentioning

confidence: 99%

Exosphere generation of the Moon investigated through a high-energy neutral detector

et al. 2010

View full text Add to dashboard Cite

Observation of the lunar exosphere is a tool for remote sensing of the surface properties. The sources of this exosphere are related to the interactions of the lunar surface with the solar radiation, with the solar wind or Earth's magnetospheric plasma, and with the interplanetary dust and meteorites. In fact, the exospheric particles are continuously created and subsequently lost in the interplanetary space, photo-ionized or re-adsorbed by the surface. Eventually, the estimation of the surface composition is not possible without the knowledge of the active release mechanisms. The relative weight of the different release processes of the various atoms, ions and molecules from the surface is still an open debate. Investigation of the Moon's release processes and interaction with the near-Earth environment is of crucial importance for both determining the relative process release contribution and understanding the surface evolution of other airless bodies, like Mercury and the giant planets' moons. In this work, an attempt to analyze the processes that take place on the surface of these small airless bodies, as a result of their exposure to the space environment, has been realized by means of the MonteCarlo Environment Simulation Tool (EST), applied to the Moon. The model results show that the different release processes can be identified by analysing the exospheric energy distribution. Finally, the instrument concept A. Milillo (B) ·

show abstract

Angular, energy, and mass distribution of sputtered particles

Cited by 89 publications

References 243 publications

The lunar exosphere: The sputtering contribution

The lunar exosphere: The sputtering contribution

From Field Emission to Vacuum Arc Ignition: A New Tool for Simulating Copper Vacuum Arcs

Exosphere generation of the Moon investigated through a high-energy neutral detector

Contact Info

Product

Resources

About