Tailored plasma-density profiles for enhanced energy extraction in passive plasma beam dumps

REVIEW ARTICLE Tailored ion energy distributions on plasma electrodes

As microelectronic device features continue to shrink approaching atomic dimensions, control of the ion energy distribution on the substrate during plasma etching and deposition becomes increasingly critical. The ion energy should be high enough to drive ion-assisted etching, but not too high to cause substrate damage or loss of selectivity. In many cases, a nearly monoenergetic ion energy dist...

Nonlinear beam generated plasma waves as a source for enhanced plasma and ion acoustic lines

Computational Lipidology: Predicting Lipoprotein Density Profiles in Human Blood Plasma

Monitoring cholesterol levels is strongly recommended to identify patients at risk for myocardial infarction. However, clinical markers beyond "bad" and "good" cholesterol are needed to precisely predict individual lipid disorders. Our work contributes to this aim by bringing together experiment and theory. We developed a novel computer-based model of the human plasma lipoprotein metabolism in ...

Plasma Neutralization Models for Intense Ion Beam Transport in Plasma

Plasma neutralization of an intense ion pulse is of interest for many applications, including plasma lenses, heavy ion fusion, cosmic ray propagation, etc. An analytical electron fluid model has been developed based on the assumption of long charge bunches (lb>>rb). Theoretical predictions are compared with the results of calculations utilizing a particle-in-cell (PIC) code. The cold electron f...

Submillimeter Beam Dumps

Several different beam dumps using parallel groove structures were made for use in absorbing electron cyclotron radiation emitted from fusion plasmas. The materials used were Pyrex. Macor, alumina, and graphite. Broadband absorption measurements indicate more than 99 % power absorption for dumps made of Pyrex and Macor, while absorption by alumina and graphite dumps are noticeably less. Waves p...