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Ion beam divergence from unstable fluctuations in applied‐B diodes
Ist Teil von
Physics of fluids. B, Plasma physics, 1993-05, Vol.5 (5), p.1614-1624
Ort / Verlag
New York, NY: American Institute of Physics
Erscheinungsjahr
1993
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
An electron plasma oscillation driven unstable by ion streaming is identified with the low‐frequency mode observed in q
u
i
c
k
s
i
l
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e
r [Computational
Physics, edited by A. Tenner (World Scientific, Singapore, 1991), pp. 475–482] numerical simulations. This mode heats the electrons along the magnetic field and is ultimately stabilized by the thermal spread. A quasilinear theory determines the saturation level of the fluctuations, the ion divergence, and the ion energy and momentum spread as they exit the diode. The ion divergence is predicted to be independent of the ion mass for fixed diode voltage and scales as the product of the effective gap and the ion beam enhancement factor over Child–Langmuir current.