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The gyrokinetic dispersion relation of microtearing modes in collisionless toroidal plasmas
Benjamin D. G. Chandran, Alexander A. Schekochihin
We solve the linearized gyrokinetic equation, quasineutrality condition, and Ampere's law to obtain the dispersion relation of microtearing modes (MTMs) in collisionless low-beta t…
Dimits transition in three-dimensional ion-temperature-gradient turbulence
Plamen G. Ivanov, Alexander A. Schekochihin, William Dorland
We extend our previous work on the 2D Dimits transition in ion-scale turbulence (Ivanov et al. 2020) to include variations along the magnetic field. We consider a three-field fluid…
Three-Dimensional Inhomogeneity of Electron-Temperature-Gradient Turbulence in the Edge of Tokamak Plasmas
J. F. Parisi, F. I. Parra, C. M. Roach +15
Nonlinear multiscale gyrokinetic simulations of a Joint European Torus edge pedestal are used to show that electron-temperature-gradient (ETG) turbulence has a rich three-dimension…
Insensitivity of a turbulent laser-plasma dynamo to initial conditions
A. F. A. Bott, L. Chen, P. Tzeferacos +18
It has recently been demonstrated experimentally that a turbulent plasma created by the collision of two inhomogeneous, asymmetric, weakly magnetised laser-produced plasma jets can…
Tearing instability and current-sheet disruption in the turbulent dynamo
Alisa K. Galishnikova, Matthew W. Kunz, Alexander A. Schekochihin
Turbulence in a conducting plasma can amplify seed magnetic fields in what is known as the turbulent, or small-scale, dynamo. The associated growth rate and emergent magnetic-field…
Electromagnetic instabilities and plasma turbulence driven by electron-temperature gradient
T. Adkins, A. A. Schekochihin, P. G. Ivanov +1
Electromagnetic (EM) instabilities and turbulence driven by the electron-temperature gradient are considered in a local slab model of a tokamak-like plasma. The model describes per…