Excede 2 test, an artificial auroral experiment - Ground-based optical measurements

Details Excede 2 test, an artificial auroral experiment - Ground-based optical measurements Excede 2 test, an artificial auroral experiment - Ground-based optical measurements

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.3281o&link_type=abstract

Journal of Geophysical Research, vol. 83, July 1, 1978, p. 3281-3288. Research supported by the U.S. Defense Nuclear Agency.

Physics

3

Auroras, Electron Accelerators, Energetic Particles, Ground Support Systems, Optical Measurement, Rocket-Borne Instruments, Electron Beams, Luminous Intensity, Telephotometry

Scientific paper

The paper discusses the Excede 2 artificial auroral experiment which has demonstrated the design of the rocketborne electron accelerator providing a 3-kV electron beam with a 10-A maximum current. The accelerator operated for about 100 s in the 106-135-km altitude range. A retarding potential analyzer indicated that the charge buildup on the electron-emitting payload never exceeded a 200-V positive potential. A ground-based telephotometer measured the time-dependent emission profiles of the N2(+) first negative band at 3914 A and the O(1S) emission at 5577 A. The fluorescent or luminous efficiency for the production of N2(+) 1 N (0-0) 3914-A emission by energetic electrons at altitudes of about 110 km was equal to or greater than 3.2 x 10 to the -3rd. The steady-state photon emission ratio of the O(1S) 5577-A to N2(+) 1 N (0-0) 3914-A emissions produced by energetic electrons at 110 km was 1.1. This is considered a measure of the ratio produced in natural aurora at this altitude.

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