A two dimensional fluid model for a dusty argon plasma in which the plasma and dust parameters are solved self-consistently, is used to study the behavior of voids, i.e., dust-free regions inside dust clouds. These voids appear in plasma crystal experiments performed under microgravity conditions. The ion drag force turns out to be the most promising driving force behind these voids. The contri...

Ye.O. Kazakov, J. Ongena, D. Van Eester, R. Bilato, R. Dumont, E. Lerche, M. Mantsinen and A. Messiaen 1 Laboratory for Plasma Physics, LPP-ERM/KMS, EUROfusion Consortium member, Brussels, Belgium 2 Max-Planck-Institut für Plasmaphysik, Garching, Germany 3 CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France 4 Catalan Institution for Research and Advanced Studies, Barcelona, Spain 5 Barcelona Supe...

In the initial phases of the Levitated Dipole Experiment (LDX), multiple frequency ECRH (with frequencies between 2.45 and 28 GHz) will be used to produce a population of energetic electrons at high-β. Use of multiple frequency ECRH in mirror experiments have shown a reduction in plasma turbulence and increased heating efficiency. The pressure profile will be controlled by adjusting the relativ...

In a recent few years, the further heating of the magnetically confined plasmas to thermonuclear temperature by using a high power source with a frequency w/2n near the lower hybrid frequency, has been investigated with great interests. For the launched wave to penetrate through the plasma boundary without significant reflection, it is desired that the parallel phase velocity of the wave, w/kz ...

Electron cyclotron heating of high density plasmas is limited due to so-called wave cut-offs. The double mode conversion scheme from O-mode to X-mode and finally to Bernstein mode O-X-B offers the possibility to overcome this limit [1]-[4]. At a particular launching angle, an O-mode wave converts to X-mode at the plasma cut-off. The power transmission function T from Oto X-mode was derived in [...

In order to determine long term performance of plasma facing components such as diverters and first walls for fusion devices, next generation plasma generators are needed. A Material Plasma Exposure eXperiment (MPEX) has been proposed to address this need through the generation of plasmas in front of the target with electron temperatures of 1-15 eV and electron densities of 10 to 10 m. Heat flu...

strong non-collisional ion heating occurs during sawtooth-like magnetic reconnection events in Madison Symmetric Torus, where ions are transiently heated to as high as 3 keV, often exceeding the electron temperature. The free energy source for this ion heating is the mean magnetic energy. Measured magnetic fluctuations exhibit an exponential spectral density consistent with dissipative nonlinea...

The dynamics of gas heating in fast pulsed discharges in nitrogen-oxygen mixtures was analyzed using a state-specific plasmachemical model and an energy conservation equation. It was shown that the heating rate changes over time according to the changes of the species involved in the heating processes. An increasing dependence on time was shown. The results show that higher electron density, el...

1. Introduction The studies of linear antenna in anisotropic mediums are important in such applications as radio communication in space, heating of plasma by high-frequency electromagnetic fields, diagnostics of magnetoactive plasma, electromagnetic compatibility of electronic devices, etc. The purpose of the present work is the solution of the problem on excitation of a system of thin impedanc...