THE ELECTRON DRIFT INSTRUMENT FOR CLUSTER |
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| Authors: | G Paschmann F Melzner R Frenzel H Vaith P Parigger U Pagel O H Bauer G Haerendel W Baumjohann N Scopke R B Torbert B Briggs J Chan K Lynch K Morey J M Quinn D Simpson C Young C E Mcilwain W Fillius S S Kerr R Mahieu E C Whipple |
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| Institution: | (1) Max-Planck-Institut für extraterrestrische Physik, 85740 Garching, Germany;(2) University of New Hampshire, Durham, NH, 03824, U.S.A;(3) Lockheed Space Science Laboratory, Palo Alto, CA, 94304, U.S.A;(4) University of California at San Diego, La Jolla, CA, 92093, U.S.A;(5) University of Washington, Seattle, WA 98195-1650, USA |
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| Abstract: | The Electron Drift Instrument (EDI) measures the drift of a weak beam of test electrons that, when emitted in certain directions, return to the spacecraft after one or more gyrations. This drift is related to the electric field and the gradient in the magnetic field, and these quantities can, by use of different electron energies, be determined separately. As a by-product, the magnetic field strength is also measured. The present paper describes the scientific objectives, the experimental method, and the technical realization of the various elements of the instrument. |
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