Measurement of potential variations in a dense oscillating plasma

Abstract

When temperature fluctuations are large in a plasma, the floating potential cannot be used to calculate electric fields. This note describes a method which allows the calculation of the plasma potential as a function of time from measured values of the electron temperature and the floating potential. An application of this technique to the evaluation of electric fields in a reflex discharge is briefly outlined.

Stable spatial Langmuir solitons

“…Various additional linear and nonlinear effects, such as higher-order dispersion [8,9,10], the saturation of nonlinearity [10,11,12], nonlocal wave interaction [13,14,15,16,17,18,19], may arrest wave collapse both in 2D and in 3D [8,9,12,13,14]. As it is shown in [20], the local part of electron-electron nonlinearity (resulting from the interaction with the second harmonic) counteracts the contraction of wave packet.…”

“…As it will be shown below, the role of nonlocal nonlinearity is quantitatively even more significant. The nonlocal nonlinearity is of great importance not only when describing soliton formation in plasmas [13,21,22], but also in the theory of Bose-Einstein condensates or matter waves [14,15,16,19], and in the construction of an adequate continuum model of the electron-phonon interaction in discrete 2D and 3D lattices [17,18].…”