Single crystalline InGaN epilayers with different In content were implanted with Er fluences in the range of 1×10 to 5×10 cm at room temperature. The structural changes and lattice site location were studied with emission channeling and RBS/channeling. Photoluminescence measurements were also performed to study the optical properties of the implanted samples. After implantation of 1×10 Er cm, t...

Electron channeling effects can create measurable signal intensity variations in all product signals that result from the scattering of the electron beam within a crystalline specimen. Of particular interest to the X-ray microanalyst are any variations that occur within the characteristic X-ray signal that are not directly related to a specimen composition variation. Many studies have documente...

A model able to explain the complicated structure of electronic stopping at low velocities in insulating materials is presented. It is shown to give good agreement with results obtained from Time Dependent Density Functional Theory for the stopping of a channeling Si atom in a Si crystal. If we define the repeat frequency f = v/λ, where λ is the periodic repeat length of the crystal along the d...

The case of the channeling radiation for electrons was considered in the previous work [Il. Th e use of the electrons for producing and detecting this type of radiation has the advantage that available electron beams have much smaller transverse phase space than thoseof the positrons. In addition, the intensity of radiation of electrons is somewhat larger in comparison to the positrons simply d...

We studied the use of low current (hundreds milliamperes) gliding arc/glow discharges for CO 2 dissociation, at atmospheric pressure, in three different configurations. All these are based on arc design with flat diverging electrodes. The discharge is mainly normal glow regime contracted positive column. gas injected from a nozzle, closest separation between A pair quartz glasses placed both si...

This talk summarizes results from recent MHD simulations of the role of a dipole magnetic field in inducing large-scale structure in the line-driven stellar winds of hot, luminous stars. Unlike previous fixed-field analyses, the MHD simulations here take full account of the dynamical competition between the field and the flow. A key result is that the overall degree to which the wind is influen...

We deal with the search process of the GraphPlan algorithm in this paper. We concentrate on the problem of finding supports for a sub-goal which arises during the search. We model the problem of finding supports as a constraint satisfaction problem in which arcconsistency or singleton arc-consistency is maintained. Contrary to other works on the similar topic, we do not model the whole planning...

The propagation of a superintense laser pulse in an underdense, inhomogeneous plasma has been studied numerically by two-dimensional particle-incell simulations on a time scale extending up to several picoseconds. The effects of the ion dynamics following the charge-displacement self-channeling of the laser pulse have been addressed. Radial ion acceleration leads to the “breaking” of the plasma...