Stochastic ion heating by a lower hybrid wave, II
Read Online
Share

Stochastic ion heating by a lower hybrid wave, II

  • 486 Want to read
  • ·
  • 53 Currently reading

Published by Dept. of Energy, Plasma Physics Laboratory, for sale by the National Technical Information Service] in Princeton, N. J, [Springfield, Va .
Written in English

Subjects:

  • Stochastic differential equations.,
  • Ions.

Book details:

Edition Notes

Statementby C. F. F. Karney, Plasma Physics Laboratory, Princeton University.
SeriesPPPL ; 1528, PPPL (Series) -- 1528.
ContributionsUnited States. Dept. of Energy., Princeton University. Plasma Physics Laboratory.
The Physical Object
Pagination69 p. :
Number of Pages69
ID Numbers
Open LibraryOL17649559M

Download Stochastic ion heating by a lower hybrid wave, II

PDF EPUB FB2 MOBI RTF

The motion of an ion in a coherent lower hybrid wave (characterized by ∣ ∣k ∣ ‖ ≪ |k⊥| and ω ≫ Ωi) in a tokamak plasma is studied. For ions satisfying v ⊥> ω/k⊥, the Lorentz force law for the ions is reduced to a set of difference equations which give the Larmor radius and phase of an ion on one cyclotron orbit in terms of these quantities a cyclotron period earlier. By including the effects of collisions, the heating rate for the bulk ions is obtained. The motion of an ion in a coherent lower hybrid wave (characterized by ‖k∥‖<<‖k⊥‖ and ω≳≳Ωi) in a tokamak plasma is studied. The motion of an ion in a coherent lower hybrid wave in a tokamak plasma is studied. The Lorentz force law for an ion is reduced to a set of difference equations. These equations exhibit stochastic behavior when the wave amplitude exceeds a threshold. The stochasticity threshold is defined and physically explained. The motion of an ion in a coherent lower hybrid wave (characterized by |k_parallel| > Omega_i) in a tokamak plasma is studied. For ions satisfying v_perp > omega/k_perp, the Lorentz force law for the ions is reduced to a set of difference equations which give the Larmor radius and phase of an ion on one cyclotron orbit in terms of these quantities a cyclotron period : Charles F. F. Karney.

The motion of an ion in a coherent lower hybrid wave (characterized by |k_parallel| |k_perp| and omega Omega_i) in a tokamak plasma is studied. For ions satisfying v_perp > omega/k_perp, the Lorentz force law for the ions is reduced to a set of difference equations which give the Larmor radius and phase of an ion on one cyclotron orbit in terms of these quantities a cyclotron period : C F F Karney.   The motion of an ion in the presence of a constant magnetic field and a perpendicularly propagating electrostatic wave with frequency several times the ion cyclotron frequency is shown to become Stochastic ion heating by a perpendicularly propagating electrostatic wave | SpringerLinkCited by: Theory of stochastic broadening of ion cyclotron resonances due to scattering of particles by turbulent rf fields has been applied to the problem of lower-hybrid wave instability excited by an energetic ion beam in a magnetized plasma. We show that resonance broadening play the major role in the case of hydrodynamic cyclotron : E.V. Suvorov, D.A. Ryndyk. The whole physical mechanism on heating of ions by a low-frequency wave with large amplitude in a low beta plasma is expounded. When the ion velocity reaches the threshold value, the prominent stochastic heating happens. The ion energy gain and average parallel speed is Cited by: 3.

The applicability of the model to the problem of ion heating by waves at the front of collisionless shock as well as ion acceleration by a spectrum of waves is discussed. Keywords: plasma; ion-cyclotron heating; shocks; beat-wave accelerator 1. Introduction The motion of ions in the lower-hybrid (LH) wave may be the reason for the enhanced particle. PTSG Seminar Emi Kawamura There are two main mechanisms for heating electrons in RF ca- pacitive discharges: ohmic and stochastic heating. Plasma resistivity due to electron-neutral collisions leads to ohmic heating while mo- mentum transfer from high voltage moving sheaths leads to stochas- tic Size: KB. tude threshold of ion stochastic heating is found to be much lower than that of a monochromatic wave,15 Evidences of ion heating by low-frequency Alfven waves have also been found in laboratory experiments–18 In this paper, we investigate ion stochastic heating by obliquely propagating magnetosonic waves. Compared with. These are summarized in the first part of the review. Particle acceleration processes are then discussed, with particular emphasis on new developments in stochastic acceleration by magnetohydrodynamic waves and direct electric field acceleration by both sub‐ and super‐Dreicer electric by: