Major disruptions, inverse cascades and the Strauss equations

Current carrying plasmas in a strong dc magnetic field are subject to violent disruptions above certain thresholds. At present difficult to verify, explanations are typically sought in terms of tearing modes. An alternative explanation is in terms of inverse magnetic helicity cascades, generated from a variety of possible sources of small scale MHD turbulence. Strongly anisotropic MHD plasmas may be described by the Strauss equations. Indications of turbulent inverse, cascade behavior for the Strauss equations are sought, in parallel with earlier examples from MHD and fluid mechanics.