Computer simulations on the nonlinear frequency shift and nonlinear modulation of ion-acoustic waves

Technical Report · Sun Oct 31 23:00:00 EST 1976

OSTI ID:6775708

Ohsawa, Y; Kamimura, T

The nonlinear behavior of ion acoustic waves with rather short wavelength was investigated by computer simulation. The nonlinear frequency shift is negative and is proportional to the square root of the initial wave amplitude when the amplitude is approximately less than 0.1. This proportionality breaks down and the frequency shift can become positive for large temperature ratios then the amplitude is approximately greater than 0.1. Nonlinear modulation of the wave packet was clearly seen; however, no modulational instability was observed. The importance of the effects of the trapped ions to these phenomena is discussed.

• Research Organization: Nagoya Univ. (Japan). Inst. of Plasma Physics
• OSTI ID: 6775708
• Report Number(s): N-77-33983; IPPJ-266
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
COMPUTER CALCULATIONS
ION ACOUSTIC WAVES
ION WAVES
NONLINEAR PROBLEMS
PLASMA WAVES
SIMULATION