Beam-Plasma Interaction and Nonlinear Effects

Yoon, Peter H.; Eliasson, Bengt; Shukła, P. K.

doi:10.1063/1.3266817

Cited by 2 publications

(2 citation statements)

References 19 publications

(23 reference statements)

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“…The small high energy tail in the distribution function produced in the low ppc result and not in the higher number simulations should be noted, as is appears to be erroneous. In some cases, prominent tails are predicted by the WT theory 36 , and this result implies high particle numbers are needed to properly reproduce this in PIC simulations. The stepped structure in this tail arises from scattering of Langmuir waves to smaller wavenumber, as described by Dum 18 , and is stronger in the low particle number case due to higher noise levels.…”

Section: Pic Code Setup and Convergence Testsmentioning

confidence: 99%

A comparison of weak-turbulence and particle-in-cell simulations of weak electron-beam plasma interaction

et al. 2014

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Quantitative comparison of reduced-description particle-in-cell and quasilinear-Zakharov models for parametrically excited Langmuir turbulence Quasilinear theory has long been used to treat the problem of a weak electron beam interacting with plasma and generating Langmuir waves. Its extension to weak-turbulence theory treats resonant interactions of these Langmuir waves with other plasma wave modes, in particular, ion-sound waves. These are strongly damped in plasma of equal ion and electron temperatures, as sometimes seen in, for example, the solar corona and wind. Weak turbulence theory is derived in the weak damping limit, with a term describing ion-sound wave damping then added. In this paper, we use the EPOCH particle-in-cell code to numerically test weak turbulence theory for a range of electron-ion temperature ratios. We find that in the cold ion limit, the results agree well, but for increasing ion temperature the three-wave resonance becomes broadened in proportion to the ionsound wave damping rate. Additionally, we establish lower limits on the number of simulation particles needed to accurately reproduce the electron and wave distributions in their saturated states and to reproduce their intermediate states and time evolution. These results should be taken into consideration in, for example, simulations of plasma wave generation in the solar corona of Type III solar radio bursts from the corona to the solar wind and in weak turbulence investigations of ion-acoustic lines in the ionosphere. V C 2014 AIP Publishing LLC.

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Section: Pic Code Setup and Convergence Testsmentioning

confidence: 99%

A comparison of weak-turbulence and particle-in-cell simulations of weak electron-beam plasma interaction

et al. 2014

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“…The Langmuir decay process has been simulated with the Zakarov equations [e.g., Guio and Forme, 2006], Vlasov simulations [e.g., Umeda et al, 2003;Silin et al, 2007] and particle-in-cell (PIC) simulations [e.g., Kasaba et al, 2001;Yoon, 2009]. In this work a PIC code is used to simulate the injection of a weak-warm beam through a much denser background plasma in order to verify the appearance of Langmuir harmonics together with the ion acoustic line enhancement via the Langmuir decay mechanism as proposed by Diaz et al [2010].…”

Section: Introductionmentioning

confidence: 99%

Particle-in-cell simulation of incoherent scatter radar spectral distortions related to beam-plasma interactions in the auroral ionosphere

et al. 2011

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[1] An electrostatic parallel particle-in-cell (EPPIC) code that allows for particle beam injections and multiple boundary conditions is used to investigate the beam-plasma interaction and its manifestations in the incoherent scatter (IS) spectrum. Specifically, the code is used to investigate anomalous enhancements in the ion acoustic line through the destabilization of the plasma by injection (or precipitation) of low-energy electron beams. This enhancement of the ion acoustic line is a form of IS distortion commonly observed in the vicinity of auroral arcs called the naturally enhanced ion-acoustic line (NEIAL). Simulations confirm the parametric decay of Langmuir waves as a plausible mechanism, assuming a mechanism for the formation of dense low-energy (<10 eV) electron beams in the ionosphere. The spectral distortions are similar at aspect angles as large as ±15°from the beam direction. Simulations also show that the first Langmuir harmonic can have a power intensity higher than that of the ion acoustic line of a thermal plasma. Conditions which would allow the detection of Langmuir harmonics with existing incoherent scatter radars are discussed.

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Beam-Plasma Interaction and Nonlinear Effects

Cited by 2 publications

References 19 publications

A comparison of weak-turbulence and particle-in-cell simulations of weak electron-beam plasma interaction

A comparison of weak-turbulence and particle-in-cell simulations of weak electron-beam plasma interaction

Particle-in-cell simulation of incoherent scatter radar spectral distortions related to beam-plasma interactions in the auroral ionosphere

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