ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
The measurements of spatial profiles of primary electron (high-energy tail electron) density in a magnetic multicusp ion source have been made in the cases of different current directions of "T''-shaped filaments, and its effects on the beam extraction have been studied. The axial profiles of arc plasma parameters in the ion source were measured by use of a movable Langmuir probe. A high-energy tail electron density ntail is calculated from the electron energy distribution function derived from probe current-voltage characteristics using Druyvesteyn's method. It is confirmed that the axial profiles of tail electron density ntail relates to the location of primary electron emission. The results indicate that higher ion-beam current is observed in the case that ntail and equivalent electron temperature Tequ are higher near the plasma electrode.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1142316
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