Measurements of the various plasma configurations produced by a planar magnetized coaxial gun provide insight into the magnetic topology evolution resulting from magnetic helicity injection. Important features of the experiments are a very simple coaxial gun design so that all observed geometrical complexity is due to the intrinsic physical dynamics rather than the source shape and use of a fas...

The two-stream instability (Buneman instability) is traditionally derived as a collisionless with the presumption that collisions inhibit this instability. We show here via combination of collisional two-fluid model and associated experimental observations made in Caltech plasma jet experiment, fact, low-frequency mode indifferent to collisions. Despite collision frequency greatly exceeding gro...

We investigate the stability of differentially rotating proto-neutron stars (PNSs) with a toroidal magnetic field. Stability criteria for nonaxisymmetric MHD instabilities are derived using a local linear analysis. PNSs are expected to have much stronger radial shear in the rotation velocity compared to normal stars. We find that nonaxisymmetric magnetorotational instability (NMRI) with a large...