Investigation of ion waves

Title: Investigation of ion waves

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Abstract

From international syrmposium on dynamics of ionized gases; Tokyo, Japan (13 Sep 1971). See CONF-710921 --. Investigations of (1) the nonlinear behavior of ion waves, (2) the growth and saturation of the ion-acoustic instability, and (3) the interaction of holes in the electron phase space with ions on a one-dimensional numerical plasma model are reported. For the nonlinear behavior of ion waves a number of different effects were examined and analyzed. The steepening and breaking of an initial sinusoidal wave were considered. It was found that for perturbations such as delta n/n approx equal k/sup 2/ lambda D/sup 2/ strong harmonic generation occurs. For sufficiently large amplitudes, the waves break and ion trapping takes place. The precise amplitude at which this occurs depends strongly on the ratio of the ion temperature to the electron temperature. A typical value for a temperature ratio of 0.03 is delta n/n = 0.25. The growth of the ion-acoustic instability was found to be in agreement with linear theory. Its saturation level was found to be determined by the energy released when electrons became trapped by the ion waves and a simple theory for it is given. Finally, it was found that holes in themore »« less

Authors:

Dawson, J M; Kruer, W L; Rosen, B; Lighthill, M J ^[1]

Publication Date:: 1973-01-01

Research Org.:: Princeton Univ., NJ

OSTI Identifier:: 4429586

NSA Number:: NSA-29-001918

DOE Contract Number:: AT(30-1)-1238

Resource Type:: Conference

Resource Relation:: Conference: International symposium on dynamics of ionized gases, Tokyo, Japan, 13 Sep 1971; Other Information: See CONF-710921--. Orig. Receipt Date: 30-JUN-74; Related Information: Dynamics of ionized gases

Country of Publication:: United States

Language:: English

Subject:: N70900* -Physics-Controlled Thermonuclear Research-Wave Phenomena; *ION ACOUSTIC WAVES- DAMPING; *PLASMA WAVES- ION ACOUSTIC WAVES; IONS; NONLINEAR PROBLEMS; ONE-DIMENSIONAL CALCULATIONS; PLASMA INSTABILITY; TRAPPED ELECTRONS

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                    Dawson, J M, Kruer, W L, Rosen, B, and Lighthill, M J. Investigation of ion waves.  United States: N. p., 1973. 
        Web.

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                    Dawson, J M, Kruer, W L, Rosen, B, & Lighthill, M J. Investigation of ion waves.  United States.

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                    Dawson, J M, Kruer, W L, Rosen, B, and Lighthill, M J. Mon .  
        "Investigation of ion waves".  United States.

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@article{osti_4429586,

  title        = {Investigation of ion waves},

  author       = {Dawson, J M and Kruer, W L and Rosen, B and Lighthill, M J},

  abstractNote = {From international syrmposium on dynamics of ionized gases; Tokyo, Japan (13 Sep 1971). See CONF-710921 --. Investigations of (1) the nonlinear behavior of ion waves, (2) the growth and saturation of the ion-acoustic instability, and (3) the interaction of holes in the electron phase space with ions on a one-dimensional numerical plasma model are reported. For the nonlinear behavior of ion waves a number of different effects were examined and analyzed. The steepening and breaking of an initial sinusoidal wave were considered. It was found that for perturbations such as delta n/n approx equal k/sup 2/ lambda D/sup 2/ strong harmonic generation occurs. For sufficiently large amplitudes, the waves break and ion trapping takes place. The precise amplitude at which this occurs depends strongly on the ratio of the ion temperature to the electron temperature. A typical value for a temperature ratio of 0.03 is delta n/n = 0.25. The growth of the ion-acoustic instability was found to be in agreement with linear theory. Its saturation level was found to be determined by the energy released when electrons became trapped by the ion waves and a simple theory for it is given. Finally, it was found that holes in the electron phase space can interact strongly with ions and that there can be an appreciable anomalous resistance associated with them. (auth)},

  doi          = {},

  url          = {https://www.osti.gov/biblio/4429586},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1973},

  month        = {1}

}

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