Abstract/Details

ION TRANSPORT THEORY FOR A STRONGLY ROTATING BEAM INJECTED TOKAMAK PLASMA

NEELEY, GARY WILLIAM.  Georgia Institute of Technology. ProQuest Dissertations Publishing, 1987. 8718457.

Abstract (summary)

The kinetic theory of ion transport in axisymmetric tokamak plasmas has been extended to include the effects of strong plasma rotation and radial viscous momentum transfer due to unbalanced neutral beam injection. To accommodate particle flow speeds which are comparable in magnitude to the ion's thermal velocity, the kinetic analysis is carried out in a coordinate frame which is moving with the plasma. As a result, the kinetic transport equations are a simple generalization of the kinetic equations valid for non-rotating plasmas with the radial gradient of the toroidal angular velocity appearing as a driving term like the temperature gradient.

An ordered hierarchy of kinetic equations are obtained for both the gyroangle dependent and gyrotropic components of the particle distribution function by expanding the particle distribution function, electric field vector and particle flow in powers of the gyroradius parameter. The lowest order kinetic equation governing the gyroangle dependent component of the particle distribution function is solved and the result is used in conjunction with the definition of the toroidal viscosity to obtain the functional structure of the gyroviscous momentum drag force.

The collisional response of the plasma to intense momentum injection is obtained by use of a linearized Fokker-Planck collision operator which accounts for both the direct and indirect effects of beam particle collisions with the background plasma species. This operator is used in the O$(\delta\sp{f1})$ drift kinetic equation to obtain a solution for the gyroaveraged component of the particle distribution function in all collision frequency regimes. The lowest order neoclassical friction-flow and parallel stress constitutive relationships are computed from a knowledge of the O($\delta\sp{1}$) particle distribution function.

Finally, the fluid equations are used in conjunction with the kinetically derived constitutive relationships to obtain an expression for the radial particle flux for a mixed regime beam injected plasma. In this regard, the theory of particle transport in the presence of an external beam momentum source is evaluated for a two specie plasma composed of a high Z impurity ion and a dominant hydrogenic ion species.

Indexing (details)


Subject
Nuclear physics
Classification
0552: Nuclear physics
Identifier / keyword
Applied sciences
Title
ION TRANSPORT THEORY FOR A STRONGLY ROTATING BEAM INJECTED TOKAMAK PLASMA
Author
NEELEY, GARY WILLIAM
Number of pages
325
Degree date
1987
School code
0078
Source
DAI-B 48/05, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
University/institution
Georgia Institute of Technology
University location
United States -- Georgia
Degree
Ph.D.
Source type
Dissertation or Thesis
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
8718457
ProQuest document ID
303580900
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
https://www.proquest.com/docview/303580900/abstract