Double layers and ion phase-space holes in the auroral upward-current region
The dynamic evolution of the boundary between the ionosphere and auroral cavity is studied using 1D and 2D kinetic Vlasov simulations. The initial distributions of three singly ionized species (H+, O+, e-) are determined from space-based observations on both sides of an inferred strong double layer....
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| Published in: | Physical review letters Vol. 97; no. 18; p. 185001 |
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| Language: | English |
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03-11-2006
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| Abstract | The dynamic evolution of the boundary between the ionosphere and auroral cavity is studied using 1D and 2D kinetic Vlasov simulations. The initial distributions of three singly ionized species (H+, O+, e-) are determined from space-based observations on both sides of an inferred strong double layer. The kinetic simulations reproduce features of parallel electric fields, electron distributions, ion distributions, and wave turbulence seen in satellite observations in the auroral upward-current region and, for the first time, demonstrate that auroral acceleration can be driven by a parallel electric field supported, in part, by a quasistable, strong double layer. In addition, the simulations verify that the streaming interaction between accelerated O+ and H+ populations continuously replenished by the double layer provides the free energy for the persistent formation of ion phase-space holes. |
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| AbstractList | The dynamic evolution of the boundary between the ionosphere and auroral cavity is studied using 1D and 2D kinetic Vlasov simulations. The initial distributions of three singly ionized species (H{sup +}, O{sup +}, e{sup -}) are determined from space-based observations on both sides of an inferred strong double layer. The kinetic simulations reproduce features of parallel electric fields, electron distributions, ion distributions, and wave turbulence seen in satellite observations in the auroral upward-current region and, for the first time, demonstrate that auroral acceleration can be driven by a parallel electric field supported, in part, by a quasistable, strong double layer. In addition, the simulations verify that the streaming interaction between accelerated O{sup +} and H{sup +} populations continuously replenished by the double layer provides the free energy for the persistent formation of ion phase-space holes. The dynamic evolution of the boundary between the ionosphere and auroral cavity is studied using 1D and 2D kinetic Vlasov simulations. The initial distributions of three singly ionized species (H+, O+, e-) are determined from space-based observations on both sides of an inferred strong double layer. The kinetic simulations reproduce features of parallel electric fields, electron distributions, ion distributions, and wave turbulence seen in satellite observations in the auroral upward-current region and, for the first time, demonstrate that auroral acceleration can be driven by a parallel electric field supported, in part, by a quasistable, strong double layer. In addition, the simulations verify that the streaming interaction between accelerated O+ and H+ populations continuously replenished by the double layer provides the free energy for the persistent formation of ion phase-space holes. |
| ArticleNumber | 185001 |
| Author | Main, D S Newman, D L Ergun, R E |
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| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/17155549$$D View this record in MEDLINE/PubMed https://www.osti.gov/biblio/20861085$$D View this record in Osti.gov |
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| Cites_doi | 10.1029/98GL00849 10.1029/JA093iA05p04005 10.1063/1.1499120 10.1029/JA095iA05p05867 10.1063/1.1499121 10.1029/2002JA009485 10.1016/j.cpc.2004.06.019 10.1016/0021-9991(76)90053-X 10.1029/2001JA007540 10.1029/JA094iA01p00348 10.1029/2005GL022547 10.1029/GL014i004p00435 10.1063/1.864006 10.1029/JA091iA06p07033 10.1007/BF00642580 10.1103/PhysRev.108.546 10.1016/0370-1573(89)90109-9 10.1029/2000JA003038 10.1029/GL017i010p01609 10.1103/PhysRevLett.38.292 |
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| References | PhysRevLett.97.185001Cc9R1 L. P. Block (PhysRevLett.97.185001Cc7R1) 1987; 14 I. Roth (PhysRevLett.97.185001Cc15R1) 1989; 94 PhysRevLett.97.185001Cc3R1 PhysRevLett.97.185001Cc2R1 P. C. Gray (PhysRevLett.97.185001Cc14R1) 1990; 17 PhysRevLett.97.185001Cc1R1 PhysRevLett.97.185001Cc20R1 PhysRevLett.97.185001Cc6R1 PhysRevLett.97.185001Cc10R1 PhysRevLett.97.185001Cc5R1 PhysRevLett.97.185001Cc11R1 D. R. Nicholson (PhysRevLett.97.185001Cc17R1) 1983 PhysRevLett.97.185001Cc4R1 PhysRevLett.97.185001Cc12R1 PhysRevLett.97.185001Cc13R1 PhysRevLett.97.185001Cc16R1 R. Bergmann (PhysRevLett.97.185001Cc21R1) 1988; 93 PhysRevLett.97.185001Cc18R1 P. A. Lindqvist (PhysRevLett.97.185001Cc8R1) 1990; 95 R. Bergmann (PhysRevLett.97.185001Cc19R1) 1986; 91 |
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| SubjectTerms | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ELECTRIC FIELDS ELECTRONS EVOLUTION FREE ENERGY HYDROGEN IONS 1 PLUS IONOSPHERE OXYGEN IONS PHASE SPACE SATELLITES SIMULATION |
| Title | Double layers and ion phase-space holes in the auroral upward-current region |
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