Refraction and reflection of ion acoustic solitons by space charge sheaths

Nishida, Yasushi; Yoshida, Kazuhiko; Nagasawa, Takeshi

doi:10.1063/1.860515

Cited by 19 publications

(10 citation statements)

References 19 publications

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“…In the ion-wave regime, on the other hand, it is rather easy to diagnose these characteristics and the physics is even similar to PWFA. At the present time, large-amplitude ion wakefields (δn/n 0 ≈ 20%) have been observed in a double plasma device [10,11] by injecting an ion bunch into a target plasma. Two kinds of ion wakefield have been observed: one is in a single ion species [11], while the other has a three-component plasma with negative ions [12].…”

Section: Introductionmentioning

confidence: 72%

Mach cone structure generation by the interaction of a short microwave pulse with a plasma

Yugami

Kusaka

Nishida

et al. 1996

Plasma Phys. Control. Fusion

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When a non-uniform unmagnetized plasma is irradiated by a short microwave pulse with length of the order of an ion-wave period, the travelling wavepacket of the electron plasma wave, and nonlinear large-amplitude waves (δn/n 0 ≈ 40%) in an ion-wave regime have been observed. The observed large-amplitude waves typically have two frequencies. The higherfrequency wave is an ion wakefield excited by the travelling wavepacket of the electron plasma wave, while the lower-frequency mode, also called a density cavity streamer, can be interpreted as a pseudowave induced by the supersonic ion bunch with a typical energy of 25 eV produced at the resonance layer. The experimental results are in reasonable agreement with a theoretical model based on the Mach cone structure.

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Section: Introductionmentioning

confidence: 72%

Mach cone structure generation by the interaction of a short microwave pulse with a plasma

Yugami

Kusaka

Nishida

et al. 1996

Plasma Phys. Control. Fusion

Self Cite

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“…The nonlinear terms of Eqs. (12)- (14) revealed lower order nonlinearity in the present plasma, compared to the usual plasma without nonisothermal electrons, for the generation of solitons. Hence, the smaller amplitude solitons are expected to evolve in the present plasma in comparison with the case of ordinary plasma.…”

Section: Discussionmentioning

confidence: 99%

“…The ion acoustic waves and hence, the solitons are found to reflect from a density gradient or the metal surface present in the plasma. There have been a lot of experimental observations concerning solitons in different plasma models [14][15][16][17][18][19][20][21][22][23]. The reflection of a planar ion acoustic soliton has been studied by Nishida [19] from a finite plane boundary.…”

Section: Introductionmentioning

confidence: 99%

Evolution of solitons and their reflection and transmission in a plasma having negatively charged dust grains

et al. 2014

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Theoretical calculations are carried out for studying soliton's reflection and transmission in an inhomogeneous plasma comprising ions, two temperature electrons and negatively charged dust grains. Using reductive perturbation technique, relevant modified KdV equations are derived for the incident, reflected and transmitted solitons. Then a coupled equation is obtained based on these mKdV equations, which is solved for the reflected soliton under the use of solutions of mKdV equations corresponding to the incident and transmitted solitons. Based on the ratio of amplitudes of reflected and incident solitons, reflection coefficient is examined under the effect of dust grain density; the same is done for the transmission coefficient which is the ratio of amplitudes of transmitted and incident solitons. The transmission of the solitons becomes weaker under the effect of stronger magnetic field and higher dust density. However, this leads to the stronger reflection of the soliton.

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“…The ion acoustic solitary waves are found to reflect from a density gradient or boundary present in the plasma. There are many experimental findings related to the propagation and reflection of solitary waves in different plasma models [16][17][18][19][20][21][22][23][24][25][26][27]. This is clear from these studies that the reflected solitary waves are in general of smaller size compared to the size of incident waves.…”

Section: Introductionmentioning

confidence: 99%

Reflection of ion acoustic solitary waves in a dusty plasma with variable charge dust

2014

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An inhomogeneous plasma comprising ions, two temperature electrons and dust grains with variable charge is explored for its unperturbed state for ions' drift due to density gradient and perturbed state for the evolution of ion acoustic solitary waves and their reflection under the effect of an external magnetic field. The ion drift velocity is found to depend on the plasma parameters and magnetic field. The perturbed state of plasma supports two types of ion acoustic waves, which evolve into fast and slow compressive solitary structures under certain conditions. However, only the fast solitary wave is observed to be reflected and acquired opposite polarity to that of the incident solitary wave. The solitary waves are found to be downshifted after their reflection. The reflection coefficient acquires higher values in the case of dust grains of fixed charge in comparison with the case of fluctuating charge on the dust grains. It means the reflection becomes stronger when the charge on the dust grains does not fluctuate and remains fixed. The effect of dust grain density is to enhance the amplitude of solitary waves but to weaken their reflection. The amplitudes of both the incident and reflected solitons remain higher for the case of fluctuating charge on the dust grains in comparison with the case of fixed charge. The effective temperature of the plasma is also found to alter the solitary structures significantly in the case of dust grains having fluctuating charge.

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Refraction and reflection of ion acoustic solitons by space charge sheaths

Cited by 19 publications

References 19 publications

Mach cone structure generation by the interaction of a short microwave pulse with a plasma

Mach cone structure generation by the interaction of a short microwave pulse with a plasma

Evolution of solitons and their reflection and transmission in a plasma having negatively charged dust grains

Reflection of ion acoustic solitary waves in a dusty plasma with variable charge dust

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