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Experimentally corroborated model of pressure relaxation limit cycle oscillations in the vicinity of the transition to high confinement in tokamaks.

Authors :
Grover, O.
Manz, P.
Yashin, A.Y.
Réfy, D.I.
Seidl, J.
Vianello, N.
Birkenmeier, G.
Solano, E.R.
Sos, M.
Bohm, P.
Bilkova, P.
Hron, M.
Panek, R.
Upgrade Team, the ASDEX
Team, the COMPASS
Team, the Globus-M
Source :
Nuclear Fusion; Feb2024, Vol. 64 Issue 2, p1-11, 11p
Publication Year :
2024

Abstract

An analytical formula systematically predicts the observed frequency of pressure relaxation limit cycle oscillations in the vicinity of the transition to high confinement in four tokamaks (JET, ASDEX Upgrade, COMPASS, Globus-M). The experimental dataset spans the widest available range of frequencies, machine sizes and plasma ion species. The machine size dependence is explained by the connection length scale of plasma flows parallel to the magnetic field. The model also explains the observed up-down poloidal current asymmetry and the impact of the plasma ion species mass and charge. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00295515
Volume :
64
Issue :
2
Database :
Complementary Index
Journal :
Nuclear Fusion
Publication Type :
Academic Journal
Accession number :
174269246
Full Text :
https://doi.org/10.1088/1741-4326/ad0eae