Simulation of the current‐driven electrostatic ion cyclotron instability

Pritchett, P. L.; Ashour‐Abdalla, M.; Dawson, J. M.

doi:10.1029/gl008i006p00611

Cited by 27 publications

(11 citation statements)

References 18 publications

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“…Southwood and Hughes, 1982). Ionson (1978) and Wentzel (1979) put forward the mechanism as a coronal heating mechanism, Lee (1980) and Rae and Roberts (1982) give a critique of the phenomenon. The magnetospheric work certainly could be of relevance to the solar problem.…”

Section: Field Line Resonancementioning

confidence: 99%

Wave generation in the terrestrial magnetosphere

Southwood¹

1983

Space Sci Rev

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The Earth's magnetosphere supports a large variety of plasma wave phenomena covering nine decades of frequency from 10 3 Hz to 10 -3 Hz. Understanding why waves occur when and where they do involves sorting out the subtle interplay between the background macroscopic features of the system, the geometry, the large scale flow, etc., and the microphysics of the plasma populations that take part. The convection induced by the solar wind produces pathological plasma phase space distributions because collisions are unimportant. Such distributions may have steep spatial gradients, inverted energy distributions or strong pitch angle anisotropy, any of which can act as a free energy source for plasma waves. Large currents along the magnetic field transmit stresses between magnetosphere and ionosphere. If the electrons carrying such currents have high enough drift velocity, waves are generated. We review several very different examples of magnetospheric wave generation.

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Section: Field Line Resonancementioning

confidence: 99%

Wave generation in the terrestrial magnetosphere

Southwood¹

1983

Space Sci Rev

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“…There has been a great deal of interest in the acceleration of ions along auroral field lines by ion cylcotron waves. Following the pioneering work of Drummond and Rosenbluth [1962], different authors [Dakin et al, 1976;Pritchett et al, 1981] considered the ion heating within the quasilinear theory in an infinite homogeneous plasma. It was found that for Ude • Ute , where Ude is the electron drift speed along the magnetic field and Vte is the thermal speed, the saturation level was lower (e4)/Te << 1) because of the formation of a plateau on the electron velocity distribution.…”

Section: Introductionmentioning

confidence: 99%

Acceleration of hydrogen ions and conic formation along auroral field lines

Okuda¹,

Ashour‐Abdalla²

1982

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Electrostatic ion cyclotron turbulence and the formation of ion conics at low altitudes (• 1500 km) along auroral field lines have been investigated analytically and by plasma numerical simulations. Ion cyclotron waves are assumed to be driven unstable by the upgoing cold ionospheric electrons associated with the downward auroral current. When the electron drift speed is comparable to the electron thermal speed, it was found that the large-amplitude (e•b/T• • 1) coherent (w -f•i) ion cyclotron waves should exist along auroral field lines at low altitudes extending a few hundred kilometers. Ion conics are associated with ion cyclotron turbulence, and the ion bulk temperature is found to increase by a factor of 10 from the initial ionospheric temperature, while the temperature of the high-energy tail can be as much as 100 times the ionospheric temperature. Theory and simulations are in good agreement. 1. 899 900 OKUDA AND ASHOUR-ABDALLA: CONICS ALONG AURORAL FIELD LINES Perpendicular and Parallel Temperature versus Time T_L,(t)/T_L,(O) ß ß ß ß i ß ß r,, (t)/•, (o) ß ß ß ß ß ß ß ß ß ß , ß ß •11 I I A J ß ß ß 'r.j_;(t) / r.L;(O) ß ß ß ß ß Tiii(t) / Tlli(O) 0 40 80 120 160 200 Fig. 8. Perpendicular and parallel ion heating via a two-dimensional model. (Case 4.)

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“…[15][16][17] In this work we would like to investigate the pattern formation associated with the current-driven electrostatic ion-cyclotron instability. In particular, we pay attention to the cases in which the electron drift velocity is smaller than the electron thermal velocity, whereas in the previous works, simulations 11,13,14 have dealt with the cases in which the electron drift velocity is larger than the electron thermal velocity. We adopt a two-and-half dimensional electrostatic particle simulation with a periodic model and an external magnetic field in the x-y plane.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10] Particle simulations have disclosed the linear growth of the instability, saturation due to quasi-linear flattening of the electron velocity distribution and the ion perpendicular heating. [11][12][13] However, only a few attempts 14 are concerned with the pattern or structure formations associated with the current-driven electrostatic ion-cyclotron instability, although several extensive works have been done on the potential structure associated with the ion acoustic instability. [15][16][17] In this work we would like to investigate the pattern formation associated with the current-driven electrostatic ion-cyclotron instability.…”

Section: Introductionmentioning

confidence: 99%

Formation of wave-front pattern accompanied by current-driven electrostatic ion-cyclotron instabilities

Ishiguro¹,

Sato²,

Takamaru³

et al. 1997

Physics of Plasmas

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Formation of a wave-front pattern accompanied by an electrostatic ion-cyclotron instability driven by electrons drifting along a magnetic field is investigated by two-and-half dimensional particle simulations. A clear spatial wave-front pattern appears as the ion cyclotron wave grows due to the instability. When the electron stream is uniform in the system, an obliquely intersected stripe wave-front pattern is formed. When the stream has a bell-shaped pattern across the magnetic field, a V-shaped stripe wave-front pattern appears. The wave fronts have small angles with the magnetic field lines and propagate from the high-stream region to the low-stream region. © 1997 American Institute of Physics. ͓S1070-664X͑97͒03308-9͔

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Simulation of the current‐driven electrostatic ion cyclotron instability

Cited by 27 publications

References 18 publications

Wave generation in the terrestrial magnetosphere

Wave generation in the terrestrial magnetosphere

Acceleration of hydrogen ions and conic formation along auroral field lines

Formation of wave-front pattern accompanied by current-driven electrostatic ion-cyclotron instabilities

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