Ponderomotive effects on ion acceleration in the auroral zone
作者:
Xinlin Li,
M. Temerin,
期刊:
Geophysical Research Letters
(WILEY Available online 1993)
卷期:
Volume 20,
issue 1
页码: 13-16
ISSN:0094-8276
年代: 1993
DOI:10.1029/92GL03011
数据来源: WILEY
摘要:
Low frequency (ω100 mV/m) Alfvén waves occur in the auroral zone. Such waves have a ponderomotive effect, on both ions and electrons. In the region between the large wave field and the ionosphere, the ponderomotive force accelerates electrons downward and ions upward, which produces an ambipolar electric field. The combined effect is to produce a differential acceleration between O+and H+with the O+accelerated more out of the ionosphere. The typical resulting energization for O+is tens of eV, which is sufficient for the ions to escape the ionosphere. We demonstrate this by means of analysis and test‐particle calcula
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