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Role of trapped and circulating particles in inducing current drive and radial electric field by Alfvén waves in tokamaks

Published online by Cambridge University Press:  08 October 2002

V. S. TSYPIN ,
R. M. O. GALVÃO ,
I. C. NASCIMENTO ,
M. TENDLER ,
J. H. F. SEVERO  and
L. F. RUCHKO
V. S. TSYPIN
Affiliation:
Institute of Physics, University of São Paulo, Rua do Matão, Travessa R, 187, 05508-900 São Paulo, Brasil
R. M. O. GALVÃO
Affiliation:
Institute of Physics, University of São Paulo, Rua do Matão, Travessa R, 187, 05508-900 São Paulo, Brasil
I. C. NASCIMENTO
Affiliation:
Institute of Physics, University of São Paulo, Rua do Matão, Travessa R, 187, 05508-900 São Paulo, Brasil
M. TENDLER
Affiliation:
The Alfvén Laboratory, EURATOM-Nuclear Fusion Research, Royal Institute of Technology, 10044 Stockholm, Sweden
J. H. F. SEVERO
Affiliation:
Institute of Physics, University of São Paulo, Rua do Matão, Travessa R, 187, 05508-900 São Paulo, Brasil
L. F. RUCHKO
Affiliation:
Institute of Physics, University of São Paulo, Rua do Matão, Travessa R, 187, 05508-900 São Paulo, Brasil
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Abstract

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Absorption by trapped particles is supposed to seriously hinder current drive by Alfvén waves. However, it is shown in this paper that the same effect is rather beneficial for the emergence of the radial electric field induced by these waves, which is important for creating and maintaining transport barriers in tokamaks.

Type
Research Article
Information
Journal of Plasma Physics , Volume 67 , Issue 5 , June 2002 , pp. 301 - 308
Copyright
2002 Cambridge University Press