
Accession Number : AD0710604
Title : RADIAL DIFFUSION OF OUTERZONE ELECTRONS: AN EMPIRICAL APPROACH TO THIRD  INVARIANT VIOLATION,
Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Personal Author(s) : Schulz,Michael ; Lanzerotti,L. J. ; Maclennan,C. G.
Report Date : 31 JUL 1970
Pagination or Media Count : 66
Abstract : The nearequatorial fluxes of outer zone electrons (E>0.5 MeV and E>1.9 MeV) measured by an instrument on the satellite Explorer 15 following the geomagnetic storm of December 1718, 1962, are used to determine the electron radial diffusion coefficients and electronlifetimes as functions of L for selected values of the conserved first invariant mu. For each value of mu the diffusion coefficient is assumed to be timeindependent and respresentable in the form D = (D sub n)(L sup n). The diffusion coefficients and lifetimes are then obtained simultaneously by requiring that the Ldependent reciprocal electronlifetime, as determined from the FokkerPlanck equation, deviate minimally from a constant in time. Applied to the data, these few assumptions yield a value of D that is smaller by approximately a factor of ten than the value obtained recently by Newkirk and Walt in a separate analysis of 1.6MeV electron data obtained during the same time period on another satellite. The electronlifetimes are found to be strong functions of L, with 46 day lifetimes observed at the higher Lvalues (4.64.8). (Author)
Descriptors : (*MAGNETOSPHERE, ELECTRONS), (*ELECTRONS, DIFFUSION), EQUATORIAL ORBITS, MAGNETIC STORMS, ELECTRON DENSITY, SCIENTIFIC SATELLITES
Subject Categories : Atmospheric Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE