It is shown that the intensity of cyclotron radiation of electrons in the plasma-magnetic-field boundary layer decreases by mc2/T times (T is plasma temperature) in comparison with radiation in the void, because dielectric permeability is large in a frequency range of the order of cyclotron frequency. Radiation intensity per unit plasma surface equals in order of magnitude, where n0 is plasma density.Because of plasma resonance in a non-uniform layer, bremsstrahlung in frequency ranges lower than the maximum Langmuir frequency is mc2/T times as large as cyclotron radiation, even for the case of rare collisions.If Langmuir oscillations in the layer are unstable because of the presence of electron drift velocity, radiation of the layer exceeds thermal radiation at the Langmuir frequency by (mc2T2/e6n0)1/2 times.
Anomalous resistance of plasmas in sub-critical electric fields