Collisionless drift instability and ion heating in a current-carrying inhomogeneous plasma

Hatakeyama, Rikizo; Oertl, M.; Märk, E.; Schrittwieser, R.

doi:10.1063/1.863203

Cited by 27 publications

(18 citation statements)

References 32 publications

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“…Enhanced growth rates of drift wave instabilities can be found with field-aligned currents (Hatakeyama et al, 1980(Hatakeyama et al, , 2011Garcia and Pécseli, 2013): in these cases the restriction on mean free paths is of minor consequence.…”

Section: Resistive Drift Waves With Ion-electron Collisionsmentioning

confidence: 93%

Spectral properties of electrostatic drift wave turbulence in the laboratory and the ionosphere

Pécseli

2015

Ann. Geophys.

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Abstract. Low-frequency electrostatic drift wave turbulence has been studied in both laboratory plasmas and in space. The present review describes a number of such laboratory experiments together with results obtained by instrumented spacecraft in the Earth's near and distant ionospheres. The summary emphasizes readily measurable quantities, such as the turbulent power spectra for the fluctuations in plasma density, potential and electric fields. The agreement between power spectra measured in the laboratory and in space seems to be acceptable, but there are sufficiently frequent counterexamples to justify a future dedicated analysis, for instance by numerical tools, to explain deviations. When interpreting spectra at low ionospheric altitudes, it is necessary to give attention to the DC ionospheric electric fields and the differences in the physics of electron-ion collisions and collisions of charged particles with neutrals for cases with significant Hall drifts. These effects modify the drift wave spectra. A dedicated laboratory experiment accounted for some of these differences.

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Section: Resistive Drift Waves With Ion-electron Collisionsmentioning

confidence: 93%

Spectral properties of electrostatic drift wave turbulence in the laboratory and the ionosphere

Pécseli

2015

Ann. Geophys.

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“…In the parallel shear case, some experimental investigations related to parallel-flow-shear driven instabilities, such as the D'Angelo mode [6][7][8], ion-acoustic [9,10], and ion-cyclotron [11][12][13] instabilities, have been performed in various situations. In these experiments, it is to be noted that the instabilities are excited by a slight amount of parallel shear in the presence of the parallel electron current which often exists in conventional configurations such as Q machine experiments [14], and therefore it is very difficult to experimentally evaluate the precise value of the parallel shear, which leads to difficulty in understanding the effects of the parallel shear on these instabilities.…”

Section: Introductionmentioning

confidence: 99%

Effects of Controlled Flow-Shear on Low-Frequency Instabilities in Magnetized Plasmas

Hatakeyama

Kaneko

Tsunoyama

2004

J. Plasma Fusion Res.

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Abstract:The external and independent control of parallel and perpendicular flow shears in collisionless magnetized plasmas are realized using two newly-developed plasma sources. The ion flow velocity shears parallel to the magnetic-field lines are then observed to destabilize not only the D'Angelo mode but also the drift-wave instability depending on the sign of the parallel shear in the absence of field-aligned electron drift flow in laboratory experiments. On the other hand, perpendicular ion flow velocity shears are demonstrated to suppress the drift-wave and the ion-cyclotron instabilities, and furthermore, these suppressions are found to take place independently of the sign of the perpendicular shear.

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“…Exactly such a sort of behavior was verified experimentally in [19]. This may be checked for example by setting larger values for BQ when the kinetic instabihty from the previous sections vanishes (because for the given parameters cOfe is reduced so that co > Q)f.e).…”

Section: Z = Teltilz^ V^tiz = ^Tiz/nii and (O^ep = (0^eao{bi)/[l mentioning

confidence: 76%

“…The mode frequency and the growth rate, with some additional features and details [19], are then given by: The mode frequency and the growth rate, with some additional features and details [19], are then given by: …”

Section: Kinetic Drift Wave Instability In Solar Coronamentioning

confidence: 99%

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A New Approach to the Coronal Heating Problem

Vranjes¹,

Poedts²,

Eliasson³

et al. 2009

AIP Conference Proceedings

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The heating of the solar corona is discussed within both frameworks of kinetic and fluid drift wave theory. It is shown that the basic ingredient necessary for the heating is the presence of the background density gradients in the direction perpendicular to the magnetic field vector These gradients are a source of free energy for the electrostatic instabilities. Strongly growing modes are found for some typical coronal plasma parameters. The instabilities a) imply the presence of electric fields that can accelerate the plasma particles in both the perpendicular and the parallel direction with respect to the magnetic field vector, and b) can stochastically heat ions. The stochastic heating i) is due to the electrostatic nature of the waves, ii) is more effective on ions than on electrons, iii) acts predominantly in the perpendicidar direction, iv) heats heavier ions more efficiently than lighter ions, and v) may easily provide a drift wave heating rate that is orders of magnitude above the value that is presently believed to be sufficient for heating the solar corona.

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Collisionless drift instability and ion heating in a current-carrying inhomogeneous plasma

Cited by 27 publications

References 32 publications

Spectral properties of electrostatic drift wave turbulence in the laboratory and the ionosphere

Spectral properties of electrostatic drift wave turbulence in the laboratory and the ionosphere

Effects of Controlled Flow-Shear on Low-Frequency Instabilities in Magnetized Plasmas

A New Approach to the Coronal Heating Problem

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