829 citations · 3.5k across the 32 of their papers we have counts for
26 papers
Stellarators with permanent magnets
P. Helander, M. Drevlak, M. Zarnstorff +1
It is shown that the magnetic-field coils of a stellarator can, at least in principle, be substantially simplified by the use of permanent magnets. Such magnets cannot create toroi…
Inertial-Range Kinetic Turbulence in Pressure-Anisotropic Astrophysical Plasmas
M. W. Kunz, A. A. Schekochihin, C. H. K. Chen +2
A theoretical framework for low-frequency electromagnetic (drift-)kinetic turbulence in a collisionless, multi-species plasma is presented. The result generalises reduced magnetohy…
Nonlinear mirror instability
F. Rincon, A. A. Schekochihin, S. C. Cowley
Slow dynamical changes in magnetic-field strength and invariance of the particles' magnetic moments generate ubiquitous pressure anisotropies in weakly collisional, magnetized astr…
Multiscale Gyrokinetics for Rotating Tokamak Plasmas II: Reduced Models for Electron Dynamics
I. G. Abel, S. C. Cowley
In this paper, we extend the multiscale approach developed in [Abel et. al., Rep. Prog. Phys., submitted] by exploiting the scale separation between ions and the electrons. The gyr…
Suppression of turbulence and subcritical fluctuations in differentially rotating gyrokinetic plasmas
A. A. Schekochihin, E. G. Highcock, S. C. Cowley
Differential rotation is known to suppress linear instabilities in fusion plasmas. However, even in the absence of growing eigenmodes, subcritical fluctuations that grow transientl…
Transport Bifurcation Induced by Sheared Toroidal Flow in Tokamak Plasmas
E. G. Highcock, M. Barnes, F. I. Parra +3
First-principles numerical simulations are used to describe a transport bifurcation in a differentially rotating tokamak plasma. Such a bifurcation is more probable in a region of…