scholarly journals Ion Acoustic Peregrine Soliton Under Enhanced Dissipation

2021 ◽  
Vol 8 ◽  
Author(s):  
Pallabi Pathak
Keyword(s):  
Acoustic Wave ◽  
Negative Ions ◽  
Landau Damping ◽  
Ion Acoustic Wave ◽  
Multicomponent Plasma ◽  
Plasma Device ◽  
Ion Acoustic ◽  
Damping Rate ◽  
Double Plasma Device ◽  
Spatial Damping

The effect of enhanced Landau damping on the evolution of ion acoustic Peregrine soliton in multicomponent plasma with negative ions has been investigated. The experiment is performed in a multidipole double plasma device. To enhance the ion Landau damping, the temperature of the ions is increased by applying a continuous sinusoidal signal of frequency close to the ion plasma frequency ∼1 MHz to the separation grid. The spatial damping rate of the ion acoustic wave is measured by interferometry. The damping rate of ion acoustic wave increases with the increase in voltage of the applied signal. At a higher damping rate, the Peregrine soliton ceases to show its characteristics leaving behind a continuous envelope.

Reflection of ion-acoustic waves from bipolar potential structures

1989 ◽  
Vol 41 (2) ◽  
pp. 243-255 ◽  
Author(s):  
Y. Nakamura ◽  
Joyanti Chutia
Keyword(s):  
Acoustic Wave ◽  
Acoustic Waves ◽  
High Efficiency ◽  
Ion Beam ◽  
Plasma Potential ◽  
Ion Acoustic Waves ◽  
Ion Acoustic Wave ◽  
Plasma Device ◽  
Ion Acoustic ◽  
Double Plasma Device

Reflection of ion-acoustic waves from the ion sheath in front of the separation grid in a double-plasma device has been investigated experimentally. The plasma potential φ of the source plasma was controlled relative to that of the target plasma. When eφ < κΤe, where Τe is the electron temperature, no reflection was observed. The reason for this is that ions are drifting towards the grid with the Bohm velocity, i.e. the ion-acoustic velocity. When eφ > κΤe the reflected wave consists of the ion-acoustic wave and the ion beam mode. The reflection coefficient for the ion-acoustic wave is about unity. This high efficiency is due to reflection of the ions themselves.

Ion-acoustic wave in relativistic nonisothermal plasma with negative ions

1993 ◽  
Vol 32 (8) ◽  
pp. 1465-1474 ◽  
Author(s):  
S. Chakraborty ◽  
A. Roy Chowdhury ◽  
S. N. Paul
Keyword(s):  
Acoustic Wave ◽  
Negative Ions ◽  
Ion Acoustic Wave ◽  
Ion Acoustic ◽  
Nonisothermal Plasma

scholarly journals Landau damping of ion acoustic wave in Lorentzian multi-ion plasmas

2011 ◽  
Vol 18 (9) ◽  
pp. 092115 ◽  
Author(s):  
Kashif Arshad ◽  
S. Mahmood ◽  
Arshad M. Mirza
Keyword(s):  
Acoustic Wave ◽  
Landau Damping ◽  
Ion Acoustic Wave ◽  
Ion Acoustic

Maximization in the damping rate of the ion acoustic wave in a two-ion plasma

1975 ◽  
Vol 18 (6) ◽  
pp. 651 ◽  
Author(s):  
Masaharu Nakamura ◽  
Masataka Ito ◽  
Yoshiharu Nakamura ◽  
Tomizo Itoh
Keyword(s):  
Acoustic Wave ◽  
Ion Acoustic Wave ◽  
Ion Plasma ◽  
Ion Acoustic ◽  
Damping Rate

scholarly journals Effect of Negative Ions on the Instability of Ion-acoustic Waves in a Relativistic Plasma

1997 ◽  
Vol 50 (2) ◽  
pp. 319 ◽  
Author(s):  
K. K. Mondal ◽  
S. N. Paul ◽  
A. Roychowdhury
Keyword(s):  
Dispersion Relation ◽  
Acoustic Wave ◽  
Acoustic Waves ◽  
Negative Ions ◽  
Ion Concentration ◽  
Negative Ion ◽  
Relativistic Velocity ◽  
Ion Acoustic Waves ◽  
Ion Acoustic Wave ◽  
Ion Acoustic

The dispersion relation of an ion-acoustic wave propagating through a collisionless, unmagnetised plasma, having warm isothermal electrons and cold positive and negative ions has been derived. It is seen that the ion-acoustic wave will be unstable in the presence of streaming of ions. Instability of the wave is graphically analysed for the plasma having (H+, O¯) ions, (H+, O2¯) ions, (H+, SF5¯) ions, (He+, Cl¯) ions and (Ar+, O¯) ions with different negative ion concentration and relativistic velocity.

Observation of large-amplitude ion acoustic solitary waves in a plasma

1987 ◽  
Vol 38 (3) ◽  
pp. 461-471 ◽  
Author(s):  
Yoshiharu Nakamura
Keyword(s):  
Solitary Wave ◽  
Acoustic Waves ◽  
Wave Train ◽  
Negative Ions ◽  
Threshold Value ◽  
Potential Method ◽  
Positive Pulse ◽  
Plasma Device ◽  
Ion Acoustic ◽  
Double Plasma Device

Propagation of nonlinear ion acoustic waves in a multi-component plasma with negative ions is investigated in a double-plasma device. When the density of negative ions is larger than a critical value, a broad negative pulse evolves to rarefactive solitons, and a positive pulse whose amplitude is less than a certain threshold value becomes a subsonic wave train. In the same plasma, a positive pulse whose amplitude is larger than the threshold develops into a solitary wave. The critical amplitude is measured as a function of the density of negative ions and compared with predictions of the pseudo-potential method. The energy distribution of electrons in the solitary wave is also measured.

Highlights from the Asia Pacific Region

2013 ◽  
Vol 02 (01) ◽  
pp. 15-25 ◽  
Author(s):  
APPN Editorial Office
Keyword(s):  
Kdv Equation ◽  
Critical Density ◽  
Negative Ions ◽  
Mkdv Equation ◽  
Asia Pacific ◽  
Asia Pacific Region ◽  
Ion Acoustic Wave ◽  
Multicomponent Plasma ◽  
Ion Acoustic ◽  
Ion Acoustic Solitons

It is well known that multicomponent plasma with negative ions supports a number of wave modes such as ion-acoustic solitons described by the Kortewege-de Vries (KdV) equation, modified KdV solitons at critical density of negative ions and ion-acoustic envelop solitons described by nonlinear Schrödinger equation (NLSE). The NLSE which is equivalent to the mKdV equation is applicable in describing evolution of ion-acoustic wave in plasma at critical density of negative ions which becomes modulationaly unstable when the nonlinear co-efficient is negative.

Effect of ion temperature on ion-acoustic solitons in a two-ion warm plasma with adiabatic positive and negative ions and isothermal electrons

1986 ◽  
Vol 36 (2) ◽  
pp. 301-312 ◽  
Author(s):  
S. G. Tagare
Keyword(s):  
Acoustic Wave ◽  
Vries Equation ◽  
Collisionless Plasma ◽  
Negative Ions ◽  
Ion Temperature ◽  
Ion Acoustic Wave ◽  
Basic Set ◽  
Ion Acoustic ◽  
De Vries ◽  
Ion Acoustic Solitons

Ion-acoustic solitons in a collisionless plasma with adiabatic positive and negative ions with equal ion temperature and isothermal electrons are studied by using the reductive perturbation method. The basic set of fluid equations is reduced for the fast ion-acoustic wave to the Korteweg–de Vries and modified Korteweg–de Vries equation and for the slow ion-acoustic wave to the Korteweg–de Vries equation. Stationary solutions of these equations are obtained and the effect of ion temperature on fast and slow ion-acoustic solitons is investigated.

scholarly journals Quantum corrections to nonlinear ion acoustic wave with Landau damping

2014 ◽  
Vol 21 (7) ◽  
pp. 072303 ◽  
Author(s):  
Abhik Mukherjee ◽  
Anirban Bose ◽  
M. S. Janaki
Keyword(s):  
Acoustic Wave ◽  
Landau Damping ◽  
Quantum Corrections ◽  
Ion Acoustic Wave ◽  
Ion Acoustic
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