Kathodenfall und Glimmlicht anomaler Glimmentladungen im longitudinalen Magnetfeld

Abstract

The model developed in Part I is proved experimentally in anomalous H₂-discharges. Probe measurements show that the plasma density of negative glow increases with magnetic field at low pressures (p < 0.2 Torr) and low magnetic fields (B < 300 G). In this region the glow is determined by diffusion. At higher pressures or higher magnetic fields there is no change of plasma density withB and the glow is determined by recombination. In all pressure ranges the change of plasma density with magnetic field is described very well by the model. — Up to magnetic fields near 500 G the H₂-glow is oscillation-free.

At constant discharge voltages the parameters of cathode fall (length of the dark space, discharge current) are changed with magnetic field too. It is shown that the influence of the magnetic field on cathode fall only is caused by the negative glow, whose efficiency δ is varied by the magnetic field. The change of δ from the model is in good agreement with experimental results.