Generation of broadband electrostatic noise by electron acoustic solitons

Dubouloz, N.; Pottelette, R.; Malingre, M.; Treumann, R. A.

doi:10.1029/90gl02677

Cited by 240 publications

(177 citation statements)

References 6 publications

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“…The nonlinear ion-acoustic waves in multi-species plasmas have been studied by several workers (Buti, 1980;Hudson et al, 1983;Qian et al, 1988;Bharutram and Shukla, 1986;Berthomier et al, 1998;Reddy and Lakhina, 1991;Reddy et al, 1992). The electronacoustic waves in multi-species plasmas have been discussed by Watanabe and Tanuti (1977); Gary and Tokar (1985); Hellberg (1985, 2001); Ashour-Abdalla and Okuda (1986); Pottelette et al (1990); Dubouloz et al (1991Dubouloz et al ( , 1993; Berthomier et al (2000Berthomier et al ( , 2003; ; Tagare et al (2004);Cattaert et al (2005), Kakad et al (2007) and Lakhina et al (2008).…”

Section: Introductionmentioning

confidence: 99%

“…The negative potential ESWs have been interpreted in terms of ion solitary waves or solitons (Koskinen et al,904 G. S. Lakhina et al: Study of nonlinear ion-and electron-acoustic waves been commonly interpreted in terms of as Bernstein-GreeneKruskal (BGK) modes (Bernstein et al, 1957;Muschietti et al, 1999;Jovanovic and Shukla, 2000;Chen et al, 2005). Other favorite interpretations for these ESWs are based on the nonlinear evolution of a bump-on-tail instability/electron two stream instability (Omura et al, 1996;Kojima et al, 1997;Goldman et al, 1999), and electron-acoustic solitary waves (Pottelette et al, 1990;Dubouloz et al, 1991Dubouloz et al, , 1993Lakhina, 2001, 2004;Tagare et al, 2004. For a detailed discussion of various models, one can refer to Lakhina et al (2000Lakhina et al ( , 2004.…”

Section: Introductionmentioning

confidence: 99%

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Study of nonlinear ion- and electron-acoustic waves in multi-component space plasmas

Lakhina

Singh

Kakad

et al. 2008

Nonlin. Processes Geophys.

104

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Abstract. Large amplitude ion-acoustic and electronacoustic waves in an unmagnetized multi-component plasma system consisting of cold background electrons and ions, a hot electron beam and a hot ion beam are studied using Sagdeev pseudo-potential technique. Three types of solitary waves, namely, slow ion-acoustic, ion-acoustic and electron-acoustic solitons are found provided the Mach numbers exceed the critical values. The slow ion-acoustic solitons have the smallest critical Mach numbers, whereas the electron-acoustic solitons have the largest critical Mach numbers. For the plasma parameters considered here, both type of ion-acoustic solitons have positive potential whereas the electron-acoustic solitons can have either positive or negative potential depending on the fractional number density of the cold electrons relative to that of the ions (or total electrons) number density. For a fixed Mach number, increases in the beam speeds of either hot electrons or hot ions can lead to reduction in the amplitudes of the ion-and electron-acoustic solitons. However, the presence of hot electron and hot ion beams have no effect on the amplitudes of slow ion-acoustic modes. Possible application of this model to the electrostatic solitary waves (ESWs) observed in the plasma sheet boundary layer is discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of nonlinear ion- and electron-acoustic waves in multi-component space plasmas

Lakhina

Singh

Kakad

et al. 2008

Nonlin. Processes Geophys.

104

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“…The sign of φ for the TG soliton follows because they depend on electron compression (in the nonlinear continuity equation) for the nonlinearity. Another potential candidate, electron acoustic solitons [32], requires the separation of electrons into separate "hot" and "cold" electron populations, (satisfying T c T h , and n c < ∼ n h ), and allows solitary structures with speeds above the electron acoustic speed v ea = (n c /n h ) 1/2 v th . Classical EA solitons are also compressive and have φ < 0.…”

Section: B Comparison With Other Theories For Nonlinear Plasma Strucmentioning

confidence: 99%

Observations of electron phase-space holes driven during magnetic reconnection in a laboratory plasma

et al. 2012

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This work presents detailed experimental observations of electron phase-space holes driven during magnetic reconnection events on the Versatile Toroidal Facility. The holes are observed to travel on the order of or faster than the electron thermal speed, and are of large size scale, with diameter of order 60 Debye lengths. In addition, they have 3-D spheroidal structure with approximately unity aspect ratio. We estimate the direct anomalous resistivity due to ion interaction with the holes and find it to be too small to affect the reconnection rate; however the holes may play a role in reining in a tail of accelerated electrons, and they indicate the presence of other processes in the reconnection layer, such as electron energization and electron beam formation.

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“…To study the properties of electron-acoustic solitary structures Dubouloz et al 3 considered a one-dimensional, unmagnetized collisionless plasma consisting of cold electrons, Maxwellian hot electrons, and stationary ions. However, in practice, the hot electrons may not follow a Maxwellian distribution due to the formation of phase space holes caused by the trapping of hot electrons in a wave potential.…”

Section: Introductionmentioning

confidence: 99%

A note on the cylindrical solitary waves in an electron-acoustic plasma with vortex electron distribution

Demı́ray

Bayındır

2015

Physics of Plasmas

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In the present work, we consider the propagation of nonlinear electron-acoustic non-planar waves in a plasma composed of a cold electron fluid, hot electrons obeying a trapped/vortex-like distribution, and stationary ions. The basic nonlinear equations of the above described plasma are re-examined in the cylindrical coordinates through the use reductive perturbation method in the long-wave approximation. The modified cylindrical Korteweg–de Vries equation with fractional power nonlinearity is obtained as the evolution equation. Due to the nature of nonlinearity, which is fractional, this evolution equation cannot be reduced to the conventional Korteweg–de Vries equation. An analytical solution to the evolution equation, by use of the method developed by Demiray [Appl. Math. Comput. 132, 643 (2002); Comput. Math. Appl. 60, 1747 (2010)] and a numerical solution by employing a spectral scheme are presented and the results are depicted in a figure. The numerical results reveal that both solutions are in good agreement.

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Generation of broadband electrostatic noise by electron acoustic solitons

Cited by 240 publications

References 6 publications

Study of nonlinear ion- and electron-acoustic waves in multi-component space plasmas

Study of nonlinear ion- and electron-acoustic waves in multi-component space plasmas

Observations of electron phase-space holes driven during magnetic reconnection in a laboratory plasma

A note on the cylindrical solitary waves in an electron-acoustic plasma with vortex electron distribution

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