Dynamics of Langmuir and ion-sound waves in type III solar radio sources

Robinson, P. A.; Willes, A. J.; Cairns, Iver H.

doi:10.1086/172632

Cited by 115 publications

(117 citation statements)

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“…The signatures of low-frequency activity in the simulations are consistent with nonthermal, sporadic ion acoustic waves associated with bursty Langmuir waves in regions of type III solar radio sources, observed by Lin et al (1986) and theoretically discussed by Robinson et al (1993) and Cairns and Robinson (1995). Figure 5 depicts the temporal variation of the longitudinal field at a fixed point (x/λ D = 1200) in the simulation box (a), together with the power spectrum in panel (b).…”

Section: Generation Of Ion Acoustic Burstssupporting

confidence: 79%

Ion dynamics in electron beam–plasma interaction: particle-in-cell simulations

Baumgärtel

2014

Ann. Geophys.

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Abstract. Electron beam-plasma interaction including ions is studied by particle-in-cell (PIC) simulations using a onedimensional, electrostatic code. Evidence for Langmuir wave decay is given for sufficiently energetic beams, as in previous Vlasov-Maxwell simulations. The mechanism for the generation of localized finite-amplitude ion density fluctuations is analyzed. Amplitude modulation due to interference between the beam-generated Langmuir waves causes random wave localization including strong transient spikes in field intensity which create bursty ion density structures via ponderomotive forces. More dense beams may quench the decay instability and generate low-frequency variations dominated by the wave number of the fastest growing Langmuir mode.

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Section: Generation Of Ion Acoustic Burstssupporting

confidence: 79%

Ion dynamics in electron beam–plasma interaction: particle-in-cell simulations

Baumgärtel

2014

Ann. Geophys.

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“…In type III bursts, the range of beam-driven wave numbers is greater in the perpendicular direction than the parallel direction [Robinson et al, 1993]. In solar wind and foreshock plasmas, the electron beam is parallel to the magnetic field B, so beam-driven Langmuir waves will have fields and wave vectors roughly parallel to B.…”

Section: Simulations Of Truncated Backscattermentioning

confidence: 99%

“…Although STI and decay produce similar product Langmuir waves, analytic work [Cairns, 2000;Mitchell et al, 2003] shows that decay should be favored over STI for typical solar wind conditions. Non-thermal ion-acoustic waves consistent with decay are often observed [Lin et al, 1986;Robinson et al, 1993;Cairns and Robinson, 1995].…”

Section: Introductionmentioning

confidence: 99%

Langmuir “snakes” and electrostatic decay in the solar wind

Graham

Cairns

Robinson

2013

Geophysical Research Letters

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[1] When Langmuir waves are driven by an electron beam to large amplitudes, they can undergo electrostatic (ES) decay to smaller wave numbers via a series of backscatters. Truncated ES decay, where the number of backscatters is reduced due to damping, is modeled here using the three-dimensional ES Zakharov equations. Langmuir beats develop in "snake"-like structures parallel to the electron beam direction and are most evident when decay is truncated to a single backscatter. From these results, an analytic form is derived and shown to be consistent with some of the waveforms and spectra observed by STEREO in the source regions of type III solar radio bursts. The agreement between the model and observations provides strong evidence for ES decay and Langmuir "snakes" parallel to the electron beam and so the ambient magnetic field. Citation:

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“…Musher et al have submitted weak Langmuir turbulence [11]. In addition, some authors have focused on Langmuir waves [12][13][14]. Dodin et al have tackled Langmuir wave evolution in nonstationary plasma [15].…”

Section: Introductionmentioning

confidence: 99%

New Exact Solutions of the System of Equations for the Ion Sound and Langmuir Waves by ETEM

Demiray

2016

MCA

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This manuscript focuses attention on new exact solutions of the system of equations for the ion sound wave under the action of the ponderomotive force due to high-frequency field and for the Langmuir wave. The extended trial equation method (ETEM), which is one of the analytical methods, has been handled for finding exact solutions of the system of equations for the ion sound wave and the Langmuir wave. By using this method, exact solutions including the rational function solution, traveling wave solution, soliton solution, Jacobi elliptic function solution, hyperbolic function solution and periodic wave solution of this system of equations have been obtained. In addition, by using Mathematica Release 9, some graphical simulations were done to see the behavior of these solutions.Keywords: the system of equations for the ion sound wave and the Langmuir wave; extended trial equation method; exact solutions; Mathematica Release 9

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Dynamics of Langmuir and ion-sound waves in type III solar radio sources

Cited by 115 publications

References 0 publications

Ion dynamics in electron beam–plasma interaction: particle-in-cell simulations

Ion dynamics in electron beam–plasma interaction: particle-in-cell simulations

Langmuir “snakes” and electrostatic decay in the solar wind

New Exact Solutions of the System of Equations for the Ion Sound and Langmuir Waves by ETEM

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