Some Early Results of the keV Plasma Experiment on GEOS-1

Borg, H.; Holmgren, L.-Ă.; Hultqvist, B.; Cambou, F.; Rème, H.; Bahnsen, A.; Kremser, G.

doi:10.1007/978-94-009-9527-7_15

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Field‐aligned electrons have also been reported in the equatorial regions of the magnetosphere by workers using data from the ATS‐6 spacecraft [ Parks et al , 1977; Lin et al , 1979; Moore and Arnoldy , 1982], the GEOS‐1 [ Borg et al , 1978] and GEOS‐2 spacecraft [ Kremser et al , 1988], and also the SCATHA (P78‐2) satellite [ Richardson et al , 1981; Arnoldy , 1986]. However, the most complete observations reported to date of counterstreaming electrons in the equatorial region have been made with the AMPTE/CCE satellite [ Klumpar et al , 1988; Klumpar , 1993].…”

Section: Introductionmentioning

confidence: 89%

Statistical distributions of field‐aligned electron events in the near‐equatorial magnetosphere observed by the Low Energy Plasma Analyzer on CRRES

Abel¹

2002

J.‐Geophys.‐Res.

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Low energy (≤100 eV–10 keV) field‐aligned electrons are often observed by the Low Energy Plasma Analyzer (LEPA) on the CRRES satellite. These electrons usually occur in bursts of <10 min duration and are mostly bidirectional, though opposing fluxes are not always equal. The events can be seen from L‐values of 5 outward (to at least L = 7) and from 0800 magnetic local time (MLT) through midnight to 1400 MLT. Larger numbers of events were seen at the outer edge of CRRES' coverage and in the evening and early morning sectors, when the apogee of CRRES was at higher latitudes. The bursts normally occur within 20 min of substorm onset. High‐latitude, low‐altitude spacecraft often observe upgoing field‐aligned electron beams. We suggest that these are the source of the field‐aligned electron beams seen by CRRES near the equator.

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Section: Introductionmentioning

confidence: 89%

Statistical distributions of field‐aligned electron events in the near‐equatorial magnetosphere observed by the Low Energy Plasma Analyzer on CRRES

Abel¹

2002

J.‐Geophys.‐Res.

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“…Field‐aligned electrons have been observed in the equatorial regions of the magnetosphere by a range of satellites (ATS‐6 [ Parks et al , 1977; Lin et al , 1979; Moore and Arnoldy , 1982], GEOS‐1 [ Borg et al , 1978] GEOS‐2 [ Kremser et al , 1988], SCATHA (P78‐2) [ Richardson et al , 1981; Arnoldy , 1986], and AMPTE/CCE [ Klumpar et al , 1988; Klumpar , 1993]. However, the observations of field‐aligned electron events (FAEs) made with the CRRES spacecraft [ Johnstone et al , 1994; Abel et al , 2002] are superior in terms of both angular and energy resolution and coverage.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous acceleration and pitch angle scattering of field‐aligned electrons observed by the LEPA on CRRES

2002

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[1] Using data from the Low Energy Plasma Analyzer we present detailed pitch angle versus energy electron distributions at the time of field-aligned electron events. We present three case studies, as well as the findings of a larger survey of 158 events. These distributions show that electrons are apparently scattered in pitch angle out of field-aligned electron beams observed around 0.1-1 keV. Generally, this pitch angle scattering is accompanied by simultaneous acceleration. As electrons are scattered from the fieldaligned beam to pitch angles of $60°, they typically increase to energies of around 10 keV. The electrons are then seen to scatter to 90°pitch angle with no further change in energy. The observations suggest that this scattering and acceleration takes place near the geomagnetic equator and over a limited range of latitudes.

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The hot ion component of the magnetospheric plasma and some relations to the electron component-observations and physical implications

Hultqvist

1979

Space Sci Rev

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Some Early Results of the keV Plasma Experiment on GEOS-1

Cited by 7 publications

References 25 publications

Statistical distributions of field‐aligned electron events in the near‐equatorial magnetosphere observed by the Low Energy Plasma Analyzer on CRRES

Statistical distributions of field‐aligned electron events in the near‐equatorial magnetosphere observed by the Low Energy Plasma Analyzer on CRRES

Simultaneous acceleration and pitch angle scattering of field‐aligned electrons observed by the LEPA on CRRES

The hot ion component of the magnetospheric plasma and some relations to the electron component-observations and physical implications

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