Abstract/Details

Particle and momentum confinement in tokamak plasmas with unbalanced neutral beam injection and strong rotation

Malik, Muhammad Afzaal.  Georgia Institute of Technology. ProQuest Dissertations Publishing, 1988. 8923420.

Abstract (summary)

There is a self-consistent theory of the effects of neutral beam injection on impurity transport in tokamak plasmas. The theory predicts that co-injection drives impurities outward and that counter-injection enhances the normally inward flow of impurities. The theory was applied to carry out a detailed analysis of the large experimental data base from the PLT and the ISX-B tokamaks. The theory was found to generally model the experimental data quite well. It is, therefore, concluded that neutral beam co-injection can drive impurities outward to achieve clean central plasmas and a cool radiating edge. Theoretical predictions for future thermonuclear reactors such as INTOR, TIBER II, and ITER indicated that neutral beam driven flow reversal might be an effective impurity control method if the rate of beam momentum deposited per plasma ion is adequate.

The external momentum drag, which is a pivotal concept in impurity flow reversal theory, is correctly predicted by the gyroviscous theory of momentum confinement. The theory was applied to analyze experimental data from the PLT and the PDX tokamaks with exact experimental conditions. The theory was found to be in excellent agreement with experiment over a wide range of parameters. It is, therefore, possible to formulate the impurity transport theory from first principles, without resort to empiricism.

Indexing (details)


Subject
Nuclear physics
Classification
0552: Nuclear physics
Identifier / keyword
Applied sciences; Particle confinement
Title
Particle and momentum confinement in tokamak plasmas with unbalanced neutral beam injection and strong rotation
Author
Malik, Muhammad Afzaal
Number of pages
276
Degree date
1988
School code
0078
Source
DAI-B 50/07, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
Advisor
Stacey, W. M., Jr.
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
8923420
ProQuest document ID
303673747
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
https://www.proquest.com/docview/303673747/abstract