5 papers
Gyrokinetic Theory of Linear Gravitational Flute Interchanges with Flow Shear Stabilization
Zheng Yang Tan, Ian Abel
A collisionless electrostatic gyrokinetic theory is developed to describe how the presence of a differential velocity shear can help stabilize linear gravitational flute interchang…
First Observation of Dispersive Shock Waves in an Electron Beam
H. McCright, I. G. Abel, I. Haber +2
Dispersive shock waves (DSWs) are expanding nonlinear wave trains that arise when dispersion regularizes a steepening front, a phenomenon observed in fluids, plasmas, optics, and s…
Machine-learning Closure for Vlasov-Poisson Dynamics in Fourier-Hermite Space
Nathaniel Barbour, William Dorland, Ian G. Abel +1
Accurate reduced models of turbulence are desirable to facilitate the optimization of magnetic-confinement fusion reactor designs. As a first step toward higher-dimensional turbule…
Electrically insulating materials for centrifugal mirrors
Nick R. Schwartz, Carlos A. Romero-Talamás, Marlene I. Patino +10
The centrifugal mirror confinement scheme incorporates supersonic rotation into a magnetic mirror device, which stabilizes and heats the plasma. This concept is under investigation…
Forced 3D reconnection in an exponentially separating magnetic field
David N. Hosking, Ian G. Abel, Steven C. Cowley
We present a solvable scenario for 3D reconnection in a sheared magnetic field. We consider a localized external force that is applied slowly to a flux tube and then maintained, ge…