Reflection of an ion-acoustic soliton by a bipolar potential wall structure

Popa, G.; Oertl, M.

doi:10.1016/0375-9601(83)90740-5

Cited by 34 publications

(17 citation statements)

References 5 publications

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“…It has been shown in some inhomogeneous plasmas that the solitary waves/solitons are accompanied by a tailinglike structure, which evolves significantly under the effect of stronger density gradients [14], [15]. The interesting property of the solitons is that they get reflected from the density gradient present in the inhomogeneous plasmas [16]- [21]. Their reflection has been investigated experimentally in negative-ion-containing plasmas [4], [22], [23] and in nonnegative ion plasmas [16]- [19], [24].…”

Section: Reflection Of Solitons At Critical Density Of Negativementioning

confidence: 96%

“…The interesting property of the solitons is that they get reflected from the density gradient present in the inhomogeneous plasmas [16]- [21]. Their reflection has been investigated experimentally in negative-ion-containing plasmas [4], [22], [23] and in nonnegative ion plasmas [16]- [19], [24]. Also, a large number of studies have been carried out by theoretical researchers in this direction [9], [10], [20], [21], [25], [26].…”

Section: Reflection Of Solitons At Critical Density Of Negativementioning

confidence: 97%

“…Following the similar procedure adopted for the incident soliton solution, the solution for (16) can be written as…”

Section: Coupling Of Mkdv Equations and Reflected Solitonsmentioning

confidence: 99%

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Reflection of Solitons at Critical Density of Negative Ions: Contribution of Thermal and Gyratory Motions of Ions

Malik

Singh²,

Kawata³

et al. 2008

IEEE Trans. Plasma Sci.

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On the basis of appropriate modified KortewegdeVries (mKdV) equation derived for three cases of n n0 < n e0 , n n0 = n e0 , and n n0 > n e0 together with n n0 (n e0 ) as the density of negative ions (electrons), we observe that compressive and rarefactive mKdV solitons propagate in an inhomogeneous magnetized plasma having negative ions at their critical density. Two types of modes (fast and slow) separately evolve as the compressive and rarefactive solitons. However, only the solitons corresponding to the fast mode get reflected, if the obliqueness of the magnetic field lies under certain critical angle ψ CR which gets larger under higher thermal motions of the ions and shows stronger dependence on it when less number of negative ions are present in the plasma. There is a possibility of the change of polarities after the reflection of the solitons. The solitons suffer stronger reflection under the effect of larger ion thermal motions and smaller obliqueness of the magnetic field. The compressive solitons are found to downshift, whereas the rarefactive solitons are upshifted after the reflection, and these shifts get higher for the increasing concentration of the negative ions and lower obliqueness of the magnetic field. The compressive (rarefactive) solitons shift less (more) in the plasmas with ions of higher thermal energy; however, the upshift shows opposite behavior for the case of n n0 > n e0 .Index Terms-Compressive and rarefactive solitons, critical density, negative ions, soliton reflection, thermal and gyratory motions of ions.

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Section: Reflection Of Solitons At Critical Density Of Negativementioning

confidence: 96%

Section: Reflection Of Solitons At Critical Density Of Negativementioning

confidence: 97%

See 1 more Smart Citation

Reflection of Solitons at Critical Density of Negative Ions: Contribution of Thermal and Gyratory Motions of Ions

Malik

Singh²,

Kawata³

et al. 2008

IEEE Trans. Plasma Sci.

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“…18,19 This reflection has been explained by a reexcitation mechanism. 20 In this mechanism, the incident wave is stripped of its electron component while the ion component passes through the grid.…”

Section: Introductionmentioning

confidence: 98%

“…[9][10][11][12][13][14][15][16][17][18][19][20][21][22] Linear ion acoustic waves were reflected from a positively biased solid metallic plate. 9 KdV solitons were reflected from a negatively biased metal plate.…”

Section: Introductionmentioning

confidence: 99%

Reflection of modified Korteweg–de Vries solitons in a negative ion plasma

Cooney

Kim

et al. 1996

Physics of Plasmas

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Reflection of modified Korteweg–de Vries solitons from the sheath in front of a negatively biased metal disk is experimentally investigated in a negative ion plasma. Both rarefactive and compressive solitons are reflected and the polarity of the reflected solitons is the same as that of the incident solitons. The points of reflection for the rarefactive and compressive solitons are at different locations. As the magnitude of the negative bias potential that is applied to the reflector is increased, the two reflection points move away from the reflector. An interpretation in terms of the sheath characteristics is presented.

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