SPECTRUM OF KINETIC-ALFVÉN TURBULENCE
SPECTRUM OF KINETIC-ALFVÉN TURBULENCE
A numerical study of strong kinetic-Alfvén turbulence at scales smaller than the ion gyroscale is presented, and a phenomenological model is proposed that argues that magnetic and density fluctuations are concentrated mostly in two-dimensional structures, which leads to their Fourier energy spectra E(k⊥)∝k−8/3⊥, where k⊥ is the wavevector component normal …