Self-adjustment and disintegration threshold of Langmuir solitons in inhomogeneous plasmas

Y. A. Chen, Y. Nishimura, Y. Nishida, C. Z. Cheng

研究成果: Article

摘要

Dynamics of Langmuir solitons in the presence of a background density gradient is investigated numerically, including cases with steep gradients to the extent the solitons can disintegrate. The disintegration threshold is explained by regarding the electric field part of the soliton as a point mass moving along the self-generated potential well corresponding to the density cavity. On the other hand, it is demonstrated that the Langmuir solitons are robust when the density gradient is below the threshold. During the acceleration phase toward low density regions, Langmuir solitons adjust themselves to balance the electric field pressure and the negative plasma pressure by expelling the imbalanced portion as density cavities at the sound velocity. When the density gradient is below the disintegration threshold, the electric field part of the soliton bounces back and forth within the potential well suggesting the solitons have internal structures.

原文English
文章編號033205
期刊Physical Review E
95
發行號3
DOIs
出版狀態Published - 2017 三月 20

指紋

disintegration
Solitons
Adjustment
Plasma
solitary waves
adjusting
thresholds
Gradient
Electric Field
gradients
Potential Well
electric fields
Cavity
cavities
Bounce
plasma pressure
acoustic velocity
Internal

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

引用此文

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Self-adjustment and disintegration threshold of Langmuir solitons in inhomogeneous plasmas. / Chen, Y. A.; Nishimura, Y.; Nishida, Y.; Cheng, C. Z.

於: Physical Review E, 卷 95, 編號 3, 033205, 20.03.2017.

研究成果: Article

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