Accession Number : AD0732648

Title :   Preliminary Report on the Observation of Low Energy Ions in the Aurora,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF PHYSICS

Personal Author(s) : Whalen,B. A. ; Miller,J. R. ; McDiarmid,I. B.

Report Date : 1970

Pagination or Media Count : 9

Abstract : A rocket borne ion spectrometer capable of separating and detecting H+, He+, and He++ with energies between 2 and 24 keV has been flown into an early evening proton aurora from Fort Churchill. The measurements made with a Black Brant IV at altitudes to 775 km enabled the positive ion composition of the primary auroral precipitation to be determined above the masking effects of atmospheric interactions. The H+ and He++ measurements were used to calculate an integrated He++/H+ flux ratio of approximately 5%. The observation of auroral He++ and H+ ions of approximately the same ratio as in the solar wind, and the apparent lack of He+ ions, is interpreted as strong evidence for a direct solar wind origin of auroral primaries. (Author)

Descriptors :   (*AURORAE, *IONS), HELIUM, HYDROGEN, MAGNETOSPHERE, IONOSPHERE, ATMOSPHERIC SOUNDING, ELECTRON DENSITY, SOLAR WIND, CANADA

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE