Physics
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..528..274l&link_type=abstract
ACCELERATION AND TRANSPORT OF ENERGETIC PARTICLES OBSERVED IN THE HELIOSPHERE: ACE 2000 Symposium. AIP Conference Proceedings, V
Physics
Solar Wind Plasma, Sources Of Solar Wind
Scientific paper
We present results from the first fully self-consistent 1D hybrid (kinetic ions/fluid electrons) simulations of the preferential heating of alphas and heavier minor ions by a flat spectrum of Alfvén-ion cyclotron waves in a collisionless plasma. We find that the simulations reproduce the observed solar wind scaling T~M for alphas and heavier minor ions when the alphas and the minor ions have equal charge to mass ratios, q/M, and equal initial thermal velocities, Vth=(T/M)1/2. This scaling is interpreted as a result of the basic physics: the time evolution of the Vlasov/Maxwell system without collisions depends only on the ratio q/M and not q or M separately. Because this result follows from the basic nature of the physical model, the T~M scaling would be obtained for any spectrum of waves. For minor ions with q/M different from the alphas but equal initial thermal velocities, the final thermal velocity is seen to vary by +/-50% from that of the alphas in the simulations presented here. .
Goldstein Bruce E.
Liewer Paulett C.
Velli M. M.
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