Nonlinear wavenumber shift of large amplitude Langmuir waves

Journal Article · Fri Jul 15 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4959811· OSTI ID:22599994

Li, Dehui ^[1]; Wang, Shaojie ^[2]

---

1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China)
2. 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, Vol. 23, Issue 7; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
ELECTRONS
LANGMUIR FREQUENCY
NONLINEAR PROBLEMS
PARTICLES
PHASE VELOCITY
PLASMA
SIMULATION