Low energy plasma analyzer
The low energy plasma analyzer (LEPA) that operates in a direct wave-particle mode in which waves (below 30 kHz), measured by separate onboard electric field and wave experiments, and LEPA signals that are directly cross-correlated, is described. LEPA was developed for the Combined Release and Radia...
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Published in | IEEE transactions on nuclear science Vol. 40; no. 2; pp. 246 - 251 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
IEEE
01.04.1993
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Subjects | |
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Abstract | The low energy plasma analyzer (LEPA) that operates in a direct wave-particle mode in which waves (below 30 kHz), measured by separate onboard electric field and wave experiments, and LEPA signals that are directly cross-correlated, is described. LEPA was developed for the Combined Release and Radiation Effects Satellite (CRRES). LEPA is capable of determining the three-dimensional distribution function of electrons and positive ions in this energy range while simultaneously determining the location in the distribution function and the frequency at which coherent wave-particle interactions may be occurring. The LEPA measurement system uses tri-quadrispherical electrostatic analyzers with microchannel plate detectors.< > |
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AbstractList | A low energy plasma analyzer (LEPA) capable of determining the 3D distribution function of electrons and positive ions in the energy range from 10 eV to 30 KeV is described. It simultaneously determines the location in the distribution function and the frequency at which coherent wave-particle interactions may occur. LEPA incorporates a particle correlator that provides a direct method of identifying regions of particle velocity space in which strong, wave-particle interactions occur. The LEPA correlator operates in the frequency range from 0 to 5.0 kHz. (AIAA) The low energy plasma analyzer (LEPA) that operates in a direct wave-particle mode in which waves (below 30 kHz), measured by separate onboard electric field and wave experiments, and LEPA signals that are directly cross-correlated, is described. LEPA was developed for the Combined Release and Radiation Effects Satellite (CRRES). LEPA is capable of determining the three-dimensional distribution function of electrons and positive ions in this energy range while simultaneously determining the location in the distribution function and the frequency at which coherent wave-particle interactions may be occurring. The LEPA measurement system uses tri-quadrispherical electrostatic analyzers with microchannel plate detectors.< > The low energy plasma analyzer (LEPA) that operates in a direct wave-particle mode in which waves (below 30 kHz), measured by separate onboard electric field and wave experiments, and LEPA signals that are directly cross-correlated, is described. LEPA was developed for the Combined Release and Radiation Effects Satellite (CRRES). LEPA is capable of determining the three-dimensional distribution function of electrons and positive ions in this energy range while simultaneously determining the location in the distribution function and the frequency at which coherent wave-particle interactions may be occurring. The LEPA measurement system uses tri-quadrispherical electrostatic analyzers with microchannel plate detectors Particles in the energy range from 10 eV to 30 KeV account for a large fraction of the total plasma energy density in the inner magnetosphere and as such play a major role in controlling the dynamics of this region. For this reason, a detailed specification of these particles and the determination of their spatial and temporal evolution are critical to the development of dynamic models of the earth's radiation belts. The low energy plasma analyzer (LEPA) for CRRES is designed to provide this specification. LEPA is capable of determining the three-dimensional distribution function of electrons and positive ions in this energy range while simultaneously determining the location in the distribution function and the frequency at which coherent wave-particle interactions may be occurring. |
Author | Johnstone, A.D. Hardy, D.A. Smith, M.F. Gough, M.P. Walton, D.M. Huber, A. Pantazis, J. Burkhardt, R. |
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Cites_doi | 10.1063/1.1684291 10.1109/TGRS.1985.289532 10.1109/TGE.1978.294551 10.1109/TGE.1978.294550 |
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References | ref7 winningham (ref4) 1981; 5 ref6 ref10 johnstone (ref9) 1987 coates (ref8) 0 burch (ref5) 1981; 5 ref1 mcilwain (ref2) 1971 hardy (ref3) 1979 |
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Snippet | The low energy plasma analyzer (LEPA) that operates in a direct wave-particle mode in which waves (below 30 kHz), measured by separate onboard electric field... A low energy plasma analyzer (LEPA) capable of determining the 3D distribution function of electrons and positive ions in the energy range from 10 eV to 30 KeV... Particles in the energy range from 10 eV to 30 KeV account for a large fraction of the total plasma energy density in the inner magnetosphere and as such play... |
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SubjectTerms | 661320 - Auroral, Ionospheric, & Magnetospheric Phenomena- (1992-) CATIONS CHARGED PARTICLES CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DESIGN DISTRIBUTION DISTRIBUTION FUNCTIONS DYNAMICS EARTH ATMOSPHERE EARTH MAGNETOSPHERE Electric variables measurement ELECTRONS ELEMENTARY PARTICLES Energy measurement FERMIONS Frequency FUNCTIONS IONS LEPTONS MEASURING INSTRUMENTS MECHANICS PLASMA DENSITY Plasma measurements Plasma waves RADIATION BELTS Radiation effects SATELLITES Signal analysis SPATIAL DISTRIBUTION |
Title | Low energy plasma analyzer |
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