Typical collision rates, and other plasma parameters, in the ISM, the solar corona, and the ionosphere. Cyclotron, or gyral, frequency. Larmor, or gyral, radius. Particle drift in the presence of electric fields or magnetic field gradients. Bxgrad B drift.
Perpendicular energy divided by field strength is an adiabatic invariant.
This is equivalent to magnetic flux inside the particle orbit and angular momentum of the particle. Earth's magnetosphere and the Van Allen belts. Longitudinal adiabatic invariant. Fermi mechanism for generating cosmic rays. Making a fluid model of a plasma.