2021
DOI: 10.48550/arxiv.2108.02822
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Extended electron tails in electrostatic microinstabilities and the nonadiabatic response of passing electrons

M. R. Hardman,
F. I. Parra,
C. Chong
et al.

Abstract: Ion-gyroradius-scale microinstabilities typically have a frequency comparable to the ion transit frequency. Hence, it is conventionally assumed that passing electrons respond adiabatically in ion-gyroradius-scale modes, due to the small electron-to-ion mass ratio and the large electron transit frequency. However, in gyrokinetic simulations of ion-gyroradius-scale modes, the nonadiabatic response of passing electrons can drive the mode, and generate fluctuations with narrow radial layers, which may have consequ… Show more

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Cited by 2 publications
(2 citation statements)
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“…Figure 5(c) overlays the eigenfunctions at different θ 0 around θ = 0 which shows that the central peak moves across θ as θ 0 in increased. Figure 5(d) shows the full eigenfunction, and the extended tail region all have a similar decaying envelope, indicating that the physics along these tails is not impacted by the central region, which is qualitatively similar to the extended electron tails seen recently in [47]. It is noted that compared to the θ 0 = 0.0 case the relative amplitude of the tails is smaller than for the cases with finite θ 0 .…”
Section: Low K Y Modessupporting
confidence: 72%
“…Figure 5(c) overlays the eigenfunctions at different θ 0 around θ = 0 which shows that the central peak moves across θ as θ 0 in increased. Figure 5(d) shows the full eigenfunction, and the extended tail region all have a similar decaying envelope, indicating that the physics along these tails is not impacted by the central region, which is qualitatively similar to the extended electron tails seen recently in [47]. It is noted that compared to the θ 0 = 0.0 case the relative amplitude of the tails is smaller than for the cases with finite θ 0 .…”
Section: Low K Y Modessupporting
confidence: 72%
“…Figure 5c overlays the eigenfunctions at different θ 0 around θ = 0 which shows that the central peak moves across θ as θ 0 in increased. Figure 5d shows the full eigenfunction, and the extended tail region all have a similar decaying envelope, indicating that the physics along these tails is not impacted by the central region, which is qualitatively similar to the extended electron tails seen recently in [47]. It is noted that compared to the θ 0 = 0.0 case the relative amplitude of the tails is smaller than for the cases with finite θ 0 .…”
Section: Impact Of Flow Shearsupporting
confidence: 74%