A stringent limit on the amplitude of Alfvénic perturbations in high-beta low-collisionality plasmas

J. Squire, E. Quataert, A. A. Schekochihin

It is shown that low-collisionality plasmas cannot support linearly polarized shear-Alfvén fluctuations above a critical amplitude $\delta B_{\perp }/B_0\sim {\beta }^{-1/2}$, where $\beta$ is…