Kelvin–Helmholtz instability in systems with large effective Larmor radius

The Kelvin–Helmholtz instability is examined for magnetized plasmas where the effective ion Larmor radius, u/ω ci , is larger than the velocity shear scale (u is the flow speed and ω ci is the ion gyrofrequency). In this parameter regime, the properties of the instability are modified as compared with the small Larmor radius case and a new short wavelength branch is introduced. The instability properties and some applications are discussed.