J D Swift 1965 Br. J. Appl. Phys. 16 837 doi:10.1088/0508-3443/16/6/309
J D Swift
Show affiliationsThe energy distribution function f(V) of the electrons in the positive column of a nitrogen discharge in a tube of 9 cm diameter is determined by means of a spherical Langmuir probe for gas pressures p between 0.2 and 0.05 torr and discharge currents between 50 and 400 mA.
The form of f(V) indicates that two groups of electrons are present with peaks at energies of about 2 and 7 ev. The slow group is shown to be an electron swarm whose mean energy is largely determined by X/p where X is the longitudinal field in the column.
Issue 6 (June 1965)
Received 7 January 1965
J D Swift 1965 Br. J. Appl. Phys. 16 837
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