Journal ArticleDOI
Energetic particle distribution in a toroidal plasma with neutral injection heating
J. G. Cordey,W. G. F. Core +1 more
Reads0
Chats0
TLDR
In this paper, an appropriate kinetic equation which contains the angular scattering, friction, and diffusion of the energetic ions by the background particles, charge exchange on the background neutrals, and acceleration of the ion by the electric field has been derived by using the WKBJ method.Abstract:
The energetic ion distribution resulting from the injection of high‐energy neutrals into a toroidal plasma has been derived. An appropriate kinetic equation which contains the angular scattering, friction, and diffusion of the energetic ions by the background particles, charge exchange on the background neutrals, and acceleration of the ions by the electric field has been solved analytically by use of the WKBJ method. Collisions of the energetic ions with the faster moving electrons results in some of the ions increasing their energy above the injection energy. The width of this ``high‐energy tail'' is shown to depend upon the electron temperature and the electric field. An estimate of the effect upon the width of this tail of collisions between the energetic ions themselves is also given. Finally, illustrated examples of the various significant physical processes are presented.read more
Citations
More filters
Journal ArticleDOI
Neoclassical transport of impurities in tokamak plasmas
S.P. Hirshman,D.J. Sigmar +1 more
TL;DR: In this paper, a closed set of moment equations is presented for the time evolution of thermodynamic and magnetic field quantities which results from collisional transport of the plasma and two-dimensional motion of the magnetic flux surface geometry.
Journal ArticleDOI
New techniques for calculating heat and particle source rates due to neutral beam injection in axisymmetric tokamaks
TL;DR: In this paper, a set of numerical techniques for calculating heat and particle source rates due to neutral beam injection in axisymmetric tokamaks is described, taking into account a number of significant, and normally neglected, effects.
Journal ArticleDOI
Energetic ion distribution resulting from neutral beam injection in tokamaks
TL;DR: In this paper, the Fokker-Planck equation for an energetic ion beam injected into a magnetized plasma consisting of Maxwellian ions and electrons with υthi ≪υb≪ υthe was studied.
Journal ArticleDOI
Tokamak plasma diagnostics
TL;DR: Tokamak plasma diagnostics is reviewed in this article, with a focus on diagnostic limitations and needs for future large tokamaks, as well as present trends and diagnostic limitations of the current state-of-the-art.
Journal ArticleDOI
Neutron measurement techniques for tokamak plasmas
TL;DR: In this article, a review of the neutron measurement techniques applied to the study of tokamak plasmas is presented, which is mainly due to practical problems of accessibility to a harsh environment but also a consequence of the wide range of neutron emission intensities that have to be covered.