On the conservation of the first adiabatic invariant in perpendicular shocks

Details On the conservation of the first adiabatic invariant in perpendicular shocks On the conservation of the first adiabatic invariant in perpendicular shocks

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86..150p&link_type=abstract

Journal of Geophysical Research, vol. 86, Jan. 1, 1981, p. 150-152.

Physics

29

Adiabatic Equations, Magnetic Moments, Particle Motion, Plasma Dynamics, Shock Wave Propagation, Space Plasmas, Angular Momentum, Computerized Simulation, Shock Fronts

Scientific paper

The conservation of the first adiabatic invariant of particle motion, the particle magnetic moment, at the front of perpendicular magnetosonic fast-mode shock waves is considered. Results of numerical simulations are presented which show that preshock and postshock values of the magnetic moment are on the average equal for particles transmitted by infinitesimally thin perpendicular magnetosonic fast-mode shocks, in contrast to extrapolations from adiabatic theory, which suggest that the first invariant is least likely to be conserved in this situation. The observed conservation is thus attributed to the continuity of the flux of total particle and field angular momentum across the shock front as a result of angular momentum conservation.

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