Runaway electrons in a magnetized plasma in an rf electric field

Runaway electrons may appear during electron-cyclotron heating of a plasma. In a constant magnetic field crossed with an rf electric field an effective acceleration of plasma electrons across the magnetic field takes place. When Coulomb collisions are taken into account, this acceleration gives rise to a stream of runaway electrons. The current in this stream is determined as a function of the amplitude of the electric field and the plasma parameters