A Key to Improved Ion Core Confinement in the JET Tokamak: Ion Stiffness Mitigation due to Combined Plasma Rotation and Low Magnetic Shear
Journal article, 2011
New transport experiments on JET indicate that ion stiffness mitigation in the core of a rotating plasma, as described by Mantica et al. [Phys. Rev. Lett. 102, 175002 (2009)] results from the combined effect of high rotational shear and low magnetic shear. The observations have important implications for the understanding of improved ion core confinement in advanced tokamak scenarios. Simulations using quasilinear fluid and gyrofluid models show features of stiffness mitigation, while nonlinear gyrokinetic simulations do not. The JET experiments indicate that advanced tokamak scenarios in future devices will require sufficient rotational shear and the capability of q profile manipulation.
Author
P. Mantica
C. Angioni
C. Challis
G. Colyer
L. Frassinetti
N. Hawkes
T. Johnsson
M. Tsalas
P.C. deVries
Jan Weiland
Chalmers, Earth and Space Sciences, Transport Theory
B. Baiocchi
M.N.A. Beurskens
A.C.A. Figueiredo
C. Giroud
J. Hobirk
E. Joffrin
E. Lerche
V. Naulin
A.G. Peeters
A. Salmi
C. Sozzi
D. Strinzi
G. Staebler
T. Tala
D. Van Ester
T. Versloot
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 107 13 135004-Driving Forces
Sustainable development
Subject Categories
Physical Sciences
Fusion, Plasma and Space Physics
Areas of Advance
Energy
Roots
Basic sciences
DOI
10.1103/PhysRevLett.107.135004