Nonlinear wavenumber shift of large amplitude Langmuir waves
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China)
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230027 (China)
Nonlinear particle-in-cell simulation is carried out to investigate the nonlinear behavior of the Langmuir wave launched with a fixed frequency in a uniform plasma. It is found that in the strong driving case, the launched wave propagates in a phase velocity larger than that predicted by the linear theory; there appears a nonlinear down-shift of wavenumber. The phase velocity of the nonlinear wave and the down-shift of the wavenumber are demonstrated to be determined by the velocity of nonlinearly accelerated resonant electrons.
- OSTI ID:
- 22599994
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 23; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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