Abstract
Nonlinear dynamics, of large-amplitude circularly polarized Alfvénic wave packets, is investigated using a one-dimensional hybrid model. Kinetic effects such as finite-Larmor radius and nonlinear Landau damping, which become significant for plasmas with β∼ 1. are appropriately accounted for in these high-resolution hybrid simulations. Spatio-temporal evolution, of the left-hand polarized (LHP) wave packets, shows that they collapse because of the decreasing dispersive effects. However, singularities are arrested by the wave-particle interactions. At some critical time te, which depends on the plasma β and the initial amplitude of the wave packet, we observe a turning point. At this turning point, the polarization changes from LHP to RHP (right-hand polarized). The wave packet then starts broadening due to increasing dispersion associated with the RHP. Implications of collapse of the magnetic structures are briefly discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 3998-4003 |
| Number of pages | 6 |
| Journal | Physics of Plasmas |
| Volume | 7 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Jan 1 2000 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
Cite this
Hybrid simulations of collapse of Alfvénic wave packets. / Buti, B.; Velli, M.; Liewer, P. C.; Goldstein, B. E.; Hada, Tohru.
In: Physics of Plasmas, Vol. 7, No. 10, 01.01.2000, p. 3998-4003.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hybrid simulations of collapse of Alfvénic wave packets
AU - Buti, B.
AU - Velli, M.
AU - Liewer, P. C.
AU - Goldstein, B. E.
AU - Hada, Tohru
PY - 2000/1/1
Y1 - 2000/1/1
N2 - Nonlinear dynamics, of large-amplitude circularly polarized Alfvénic wave packets, is investigated using a one-dimensional hybrid model. Kinetic effects such as finite-Larmor radius and nonlinear Landau damping, which become significant for plasmas with β∼ 1. are appropriately accounted for in these high-resolution hybrid simulations. Spatio-temporal evolution, of the left-hand polarized (LHP) wave packets, shows that they collapse because of the decreasing dispersive effects. However, singularities are arrested by the wave-particle interactions. At some critical time te, which depends on the plasma β and the initial amplitude of the wave packet, we observe a turning point. At this turning point, the polarization changes from LHP to RHP (right-hand polarized). The wave packet then starts broadening due to increasing dispersion associated with the RHP. Implications of collapse of the magnetic structures are briefly discussed.
AB - Nonlinear dynamics, of large-amplitude circularly polarized Alfvénic wave packets, is investigated using a one-dimensional hybrid model. Kinetic effects such as finite-Larmor radius and nonlinear Landau damping, which become significant for plasmas with β∼ 1. are appropriately accounted for in these high-resolution hybrid simulations. Spatio-temporal evolution, of the left-hand polarized (LHP) wave packets, shows that they collapse because of the decreasing dispersive effects. However, singularities are arrested by the wave-particle interactions. At some critical time te, which depends on the plasma β and the initial amplitude of the wave packet, we observe a turning point. At this turning point, the polarization changes from LHP to RHP (right-hand polarized). The wave packet then starts broadening due to increasing dispersion associated with the RHP. Implications of collapse of the magnetic structures are briefly discussed.
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U2 - 10.1063/1.1289890
DO - 10.1063/1.1289890
M3 - Article
AN - SCOPUS:0001256181
VL - 7
SP - 3998
EP - 4003
JO - Physics of Plasmas
JF - Physics of Plasmas
SN - 1070-664X
IS - 10
ER -