Formation of edge and internal transport barriers in tokamaks by Alfv{acute e}n waves

Journal Article · Thu Jan 01 04:00:00 EST 1998 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872706· OSTI ID:565754

Tsypin, V S ^[1]; Elfimov, A G ^[2]; Tendler, M ^[3]; de Assis, A S ^[4]; de Azevedo, C A ^[1]

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1. Institute of Physics, State University of Rio de Janeiro, 20550-013, Maracana, Rio de Janeiro, Rio de Janeiro (Brazil)
2. Physics Institute, University of Sao Paulo, Cx. Postal 20516 Sao Paulo, Sao Paulo (Brazil)
3. The Alfven Laboratory, EURATOM-Nuclear Fusion Research, Royal Institute of Technology, 10044 Stockholm (Sweden)
4. Institute of Mathematics-Group of Applied Mathematics, Fluminense Federal University, Niteroi, Rio de Janeiro (Brazil)

It is demonstrated that Alfv{acute e}n waves may be the convenient trigger for the formation of transport barriers in tokamaks. Kinetic or slow Alfv{acute e}n waves, which appear in the tokamak plasma as a result of the rf wave{close_quote}s conversion, have small radial localizations. It is proposed that these waves can be used to create strongly sheared plasma flows at any point of the plasma minor radius, to suppress the plasma turbulence and to obtain the locally reversed magnetic shear configuration. Estimations concerning the absorbed power of Alfv{acute e}n waves, which are necessary to suppress the plasma turbulence in some tokamaks, are about the level of absorbed power to be used in early fulfilled experiments. This method can assist the achievement of self-organization processes in tokamaks. {copyright} {ital 1998 American Institute of Physics.}

• OSTI ID: 565754
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 5; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
CHARGED-PARTICLE TRANSPORT
POWER LOSSES
SHEAR
TOKAMAK DEVICES
TURBULENCE
WAVE PROPAGATION