Ion-acoustic soliton-like waves undergoing Landau damping |
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Institution: | 1. Department of Electrical and Electronic Engineering, Utsunomiya University, Utsunomiya, Tochigi 321-8585, Japan;2. The Institute of Space and Astronautical Science, Sagamihara, Kanagawa 229-8510, Japan |
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Abstract: | Effects of Landau damping on ion-acoustic soliton-like waves are investigated experimentally and numerically. Landau damping is enhanced by increasing the ion temperature in the experiments. A ramp which is composed of resonant ions is observed in front of a soliton-like wave. The ramp is also seen in numerical simulations of an extended Korteweg–de Vries equation with a term of Landau damping. Experimental results of the height of the ramp are found to agree with numerical ones. |
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