Neutral gas atoms in a heat exchanger create pressure as the gas is heated on all the walls of the cylinder because the molecular collisions are randomized. If we take the same cylinder and fill it with a "hot"plasma and place permanent magents about this cylinder the collisions become less random and we find more collisions occuring at one part of the heat exchanger than another. If we attach a wire between the hot spot and the cold spot then current will flow as long as there is a temperature difference between the two spots. The system as a whole will be seeking to reach equilibrium but the thermal input will not allow this as long as load is drawn from the system one spot will stay relatively cool. In a television picture tube a spring is placed around the tube to sequester positive ions that remain in the tube after its evacuation. A highly negative static charge is applied to this spring. If the same is done with a gas filled tube and the tube is irradiated with high frequency which causes ionization of the gas, the "spring" will attract the positive ions leaving a cloud of electrons. The spring being wrapped completely around the exchanger. This leaves a core of electrons pretty much drifting around the tube. The walls of the tube are coated with positive ions. This wall of positive ions vibrates with the thermal impacts transmitted from outside the tube. The kinetic energy is then passed on to the electrons which when accelerated are directed by the permanent magnet fields to heat up the target, hot spot, emitter.
aha,anisotropic heat convection