Electron beam experiments on the nearly geosynchronous P78—2 satellite conducted in 1979 resulted in observations of intense radiation near the local electron gyrofrequency. These signals resembled naturally occuring fCe waves during the same period. The amplitude of the stimulated waves depended upon beam parameters. During 50 eV beam operations, current levels of 10 pA produced strong emissio...

We investigate cylindrical and spherical solitons in electron-ion (EI) plasma that contains hot (cold) electrons with stationary ions. The magneto-hydrodynamic equations are solved the aid of reductive perturbation (RP) technique, leading to modified Korteweg–De Vries (mKdV) equation for non-linear behaviour solitary waves EI plasma. By employing reduced differential transform method (RDTM), an...

Context. Recent studies of the solar wind sunward 0.25 AU reveal that it contains quiescent regions, with low-amplitude plasma and magnetic field fluctuations, a direction similar to Parker spiral. The regions are thought have more direct connection corona than other types wind, suggesting waves or instabilities in indicative early evolution as escapes corona. highly unstable formation near ele...

The spin effects on electromagnetic waves in a strongly magnetized plasma with rare collisions is considered with the help of relativistic kinetic equations, which takes into account the electron spin dynamics in the selfconsistent electric and magnetic fields. It is shown that for electromagnetic waves propagating almost perpendicular to ambient magnetic field the spin effects become essential...

The use of radio frequency (RF) waves to generate plasma current and to modify the current profile in magnetically confined fusion devices is well documented. The current is generated by the interaction of electrons with an appropriately tailored spectrum of externally launched RF waves. In theoretical and computational studies, the interaction of RF waves with electrons is represented by a qua...

The introduction of an electronegative gas (i.e., a gas with a large electron attachment cross section, e.g., SF6) into a plasma has made it possible to study plasmas in which the negative ion density can be much larger than the electron density. lp2 In such a plasma, new phenomena may be expected to occur, in particular, various electrostatic wave modes are modified by the presence of negative...

We present a comprehensive review of recent theoretical and numerical studies of the formation and dynamics of electron and ion holes in a collisionless plasma. The electron hole is characterized by a localized positive potential in which a population of electrons is trapped, and a depletion of the electron number density, while the ion hole is associated with localized negative potential in wh...

“This paper had its origins in a summer of 1956 project to build 1,420 mc low noise traveling wave tubes for use as preamplifiers in the Caltech radio telescope. The tubes that I built had measured noise figures that were much worse than the predicted theoretical minimum of six db. I used the standard low noise tube design formulae, which had been previously demonstrated to result in tubes that...

A new implicit fully electromagnetic particle in cell method is presented in which the full ion dynamic and all the electron guiding centre drifts of a magnetized collisionless plasma are retained. This code retains the inertial effects on the electrons. It must be used for time steps larger or so than an electron cyclotron period, it is only valid for an electron plasma beta be < 1. Therefore,...