Langmuir probe measurements in an expanding magnetized plasma

Abstract

Langmuir probe measurements were performed in magnetized expanding plasmas of different compns. Under the assumption that a function fitted to results in argon is valid in other plasmas, it is possible to study the influence of the magnetic field in nitrogen and hydrogen plasmas. The electron d. in nitrogen can be increased by a factor of 10 by the application of a magnetic field of 4.5 mT. In hydrogen the d. can be increased by a factor of 100 by a magnetic field of 20 mT. The dominant ionic species in the magnetized nitrogen and hydrogen plasmas is the at. ion (N+ and H+, resp.). [on SciFinder (R)