Acceleration and Stochastic Heating of Ions Drifting Through an Auroral Arc
1992 (English)In: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 97, 19333-19339 p.Article in journal (Refereed) Published
We find that ions E x B drifting through an auroral arc can undergo transverse acceleration and stochastic heating. This result is very analogous to recent work regarding similar phenomena in the magnetotail (Buchner and Zelenyi, 1990; Chen and Palmadesso, 1986; Brittnacher and Whipple, 199 1). An analytic expression for the maximum arc width for which chaotic behavior is present is derived and numerically verified. We find, for example, that a 1.5-km-thick arc at LAMBDA = 65-degrees requires a minimum potential drop of 3 kV for transverse ion acceleration and heating to occur. Thicker arcs require higher potential drops for stochasticity to occur. This mechanism could be a source for conic ions.
Place, publisher, year, edition, pages
1992. Vol. 97, 19333-19339 p.
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-92882DOI: 10.1029/92JA01653OAI: oai:DiVA.org:kth-92882DiVA: diva2:514429
NR 201408052012-04-092012-04-072012-04-09Bibliographically approved