The Low Energy Particle (LEP) Experiment onboard the GEOTAIL Satellite
作者： T. Mukai , S. Machida , Y. Saito , M. Hirahara , T. Terasawa
DOI: 10.5636/JGG.46.669
关键词: Velocity Moments 、 Electron 、 Solar wind 、 Atomic physics 、 Interplanetary medium 、 Physics 、 Ion 、 Temporal resolution 、 Plasma 、 Computational physics 、 Magnetosphere
摘要: The low energy particle (LEP) instrument onboard GEOTAIL is designed to make comprehensive observations of plasma and energetic electrons ions with fine temporal resolution in the terrestrial magnetosphere (mainly magnetotail) interplanetary medium. It consists three units sensors (LEP-EA, LEP-SW LEP-MS) a common electronics (LEP-E). Energy-per-charge Analyzers (EA) measure three-dimensional velocity distributions (with EA-e) EA-i), simultaneously separately, over the. energy-per-charge range several eV/q 43 keV/q. Emphasis EA design laid on large geometrical factor tenuous magnetotail sufficient counting statistics high-time-resolution measurement. On other hand, Solar Wind ion analyzer (SW) has smaller factor, but angular resolutions, spectra solar wind ions. In both SW sensors, complete can only be obtained period four spins, while moments up third order are calculated every spin (nominally, 3 sec). energetic-ion Mass Spectrometer (MS) provide determinations composition. this paper, we describe instrumentation present some examples inflight measurements.
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