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<p>A previous statistical survey of data from the HPCE experiment on the AMPTE/CCE satellite established probability distributions for trapped ions and electrons. An extension of this survey for ions at 240 and 442 eV and for electrons at 340 and 770 eV confirmed these distributions. A further detailed analysis of the electron data from 13 individual data collection days also showed the trapped electron distribution to be concentrated in the dawn to noon region, centered at L=7. These trapped electron distributions can be described as a bi-Maxwellian distribution function and be characterized reasonably by the criteria that the flux has to exceed 5e6 per (sq. cm sec sr), the distribution has to be within 10 deg. of the magnetic equator, the ratio of the perpendicular temperature to the parallel temperature exceeds 3.0 and that the anisotropy exceeds 2.0 for 150 eV electrons and 4.4 for 340 eV electrons.
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<br>Subjects: Equatorially trapped plasmas; Plasmapause; AMPTE; Ion distributions; Electron distributions; Bi-Maxwellian</div>
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Lantto, Eric S.</div>
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