RF heating in a strong auroral electrojet

Robinson, T. R. and Bond, G. and Eglitis, P. and Honary, F. and Rietveld, M. T. (1998) RF heating in a strong auroral electrojet. Advances in Space Research, 21 (5). pp. 689-692.

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Abstract

Results are reported from experiments in which the high power HF facility at Tromsø, Norway was employed to modify the Hall current region of the auroral ionosphere during periods when the electrojet became enhanced. During conditions characterised by a weak electrojet and completely underdense heating, observations indicated that RF heating leads to the expected increase in the electron temperature, inferred from EISCAT UHF radar measurements, at all altitudes between 100 and 135 km. However, under conditions characterised by a strong electrojet and slightly underdense heating, observations indicated that RF heating appeared to reduce the electrojet electron temperature, in the altitude range 100–115 km, whilst still enhancing the electron temperatures in the layers above the electrojet, in the altitude range 120–135 km. These, somewhat surprising, results are discussed in terms of a theory of the interaction between high power electromagnetic waves and irregularities excited by the Farley-Buneman instability at electrojet altitudes.

Item Type:
Journal Article
Journal or Publication Title:
Advances in Space Research
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1912
Subjects:
?? heating dcs-publications-idart-84dcs-publications-creditsionodcs-publications-personnel-id5space and planetary scienceaerospace engineeringqa75 electronic computers. computer science ??
ID Code:
9980
Deposited By:
Deposited On:
24 Jun 2008 16:27
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2024 11:43