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Effect of burst ions on the excitation of ion-acoustic solitons in a drifting plasma
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10.1063/1.2771134
/content/aip/journal/pop/14/9/10.1063/1.2771134
http://aip.metastore.ingenta.com/content/aip/journal/pop/14/9/10.1063/1.2771134
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of the experimental setup. The symbols are A: anode mesh; F: hot filaments; G: separation grid; SG: small grid; and CP: cylindrical probe.

Image of FIG. 2.
FIG. 2.

Schematic structure of the potential profile and ion types around the small negatively biased grid.

Image of FIG. 3.
FIG. 3.

(Color online) Perturbation signals in electron saturation current vs time received by the probe at away from the small grid in region II, for a fixed amplitude but different rise times of the applied ramp excitation voltage. A: ion burst mode; B: soliton; C: directly coupled signal. The two vertical lines represent the peak position of the signal A and B when .

Image of FIG. 4.
FIG. 4.

(Color online) Perturbation signals in the electron saturation current vs time at the probe away from the small grid in region II, for a fixed rise time but different amplitudes of the applied ramp excitation voltage. A: ion burst mode; B: soliton; C: directly coupled signal. The two vertical lines represent the peak position of the signal A and B when .

Image of FIG. 5.
FIG. 5.

(Color online) Variation of the speeds of the IBM and the soliton with respect to the rise time of the applied signal, for (a) waves propagating along the plasma flow, and (b) waves propagating against the plasma flow.

Image of FIG. 6.
FIG. 6.

(Color online) Variation of the amplitudes of the IBM and soliton with respect to the rise time of the applied signal, from (a) measurements at and in region II, and (b) measurements at and in region I.

Image of FIG. 7.
FIG. 7.

(Color online) Variation of the IBM and soliton speeds with respect to the amplitude of the excitation signal. (a) For waves along the plasma flow with , and (b) for waves against the plasma flow with .

Image of FIG. 8.
FIG. 8.

(Color online) Variation of the IBM and soliton amplitude with respect to the peak-to-peak amplitude of the excitation signal. (a) From data obtained at and , for waves propagating along the plasma flow, and (b) data obtained at and , for waves propagating against the plasma flow.

Image of FIG. 9.
FIG. 9.

(Color online) The dependence of the soliton velocity on its amplitude from the data of Figs. 5(a) and 6(a). The straight line is the linear fit with .

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/content/aip/journal/pop/14/9/10.1063/1.2771134
2007-09-14
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of burst ions on the excitation of ion-acoustic solitons in a drifting plasma
http://aip.metastore.ingenta.com/content/aip/journal/pop/14/9/10.1063/1.2771134
10.1063/1.2771134
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