Particles will be reflected by these entities where a ratio of their magnitude equals the sine of the pitch angle squared.
Petschek's fast model for changes in these entities' structure involves a small diffusion region and in two dimensions that process can only occur at X points. Particles will be reflected by these entities where a ratio of their magnitude equals the sine of the pitch angle squared. This quantity moves with the local plasma velocity according to Alfven's theorem. The restoring force applied by the tension of this quantity gives rise to (*) Alfven waves, as described by a discipline which uses the Navier-Stokes equations to analyze interactions between this quantity and plasma. Z and theta pinches use this quantity to confine plasma, as do tokamaks, and q times E plus v cross this quantity is equal to the Lorentz force. For 10 points, name this field which is created by moving electric charges.
Petschek's fast model for changes in these entities' structure involves a small diffusion region and in two dimensions that process can only occur at X points.
magnetic field [or magnetic induction, or H or B field] 