Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Review of Scientific Instruments
59 (1988), S. 1369-1375
ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Three designs for negative-ion plasma sources are described. Two sources utilize metal hexafluorides such as SF6 and WF6 to scavenge electrons from electron-ion plasmas and the third relies upon surface ionization of alkali halide salts on heated alumina and zirconia. SF6 introduced into electron-ion plasmas yielded negative-ion plasma densities of 1010 cm−3 with low residual electron densities, (ne/ni∼0.01–0.05). On alumina, plasma densities of 5×109 cm−3 were obtained for CsCl, CsI, and KI and 109 cm−3 for KCl. On zirconia 1010 cm−3 densities were obtained for CsCl. For alkali halide sources, electron densities of ne/ni(approximately-less-than)10−4 have been achieved.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1139671
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