Microwave Reflection by Plasma With Density Gradient

Perturbing microwave beams by plasma density fluctuations

The propagation of microwaves across a turbulent plasma density layer is investigated with fullwave simulations. To properly represent a fusion edge-plasma, drift-wave turbulence is considered based on the Hasegawa-Wakatani model. Scattering and broadening of a microwave beam whose amplitude distribution is of Gaussian shape is studied in detail as a function of certain turbulence properties. P...

Bull Fertility and Its Relation with Density Gradient Selected Sperm

Background sperm selection is generally used to describe methods for separation of spermatozoa for in-vitro-assisted reproduction. Few studies reported relation in vivo fertility and semen parameters after selection of fertile spermatozoa; hence, our research attempt to assess different semen parameters after post-thaw (PT) or after selecting sperm sample (SSp), using density gradient separatio...

Fast-electron self-collimation in a plasma density gradient

Transparency of overdense plasma with V shape density profile

In this study, we investigate the transparency of an overdense inhomogeneous plasma slab. This anomalous transmission is achieved when the conditions provided for the incident electromagnetic wave to excite coupled surface waves on the both sides of the slab. These conditions require that the homogeneous overdense plasma, or the metallic film, is placed between two dielectric layers. Here, the ...

Synthesis of high-density carbon nanotube films by microwave plasma chemical vapor deposition

Nanotubes with diameters ranging from 20 to 400 nm and densities in the range of 108 109 cm 2, produced on metal-coated Ž . Ž . silicon by microwave plasma chemical vapor deposition, show various shapes depending upon: i growth conditions; and ii preor post-growth treatment of the samples. Presence of nitrogen in the growth or pre-growth atmosphere increases the density and vertical growth rate...