High frequency electromagnetic drift waves

Detyna, E; Wooding, E. R.

doi:10.1088/0032-1028/17/7-8/003

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…For example, satellite measurements indicate that ion energy anisotropy with T^ > Tj y can also exist in interplanetary space [104]. Moreover, the instability considered here may also play an important role in the stability behaviour of laboratory plasmas heated by neutral-particle injection perpendicular to the magnetic field, and in mirrormachine plasmas characterized by a loss-cone distribution for Fi(vl, vj|, t) [105].…”

Section: Z © CCmentioning

confidence: 97%

Anomalous transport in high-temperature plasmas with applications to solenoidal fusion systems

Davidson

Krall²

1977

Nucl. Fusion

233

118

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The linear, non-linear, and anomalous transport properties associated with various microinstabilities driven by cross-field currents in high-temperature plasmas are reviewed. Particular emphasis is placed on instabilities pertinent to the implosion and post-implosion phases of theta-pinch plasmas, e.g. Buneman (electron-ion two-stream), ion acoustic, lower-hybrid-drift, electromagnetic ion cyclotron, and ion-ion cross-field instabilities. Analytic studies of the non-linear and quasi-linear evolution of these instabilities are presented, together with a detailed comparison with computer simulation experiments to test the validity of the various theoretical models and non-linear saturation mechanisms. A general theoretical formalism is presented which describes, in a self-consistent manner, the macroscopic transport produced by the (shortwave-length) turbulence associated with the microinstabilities enumerated above. The experimental evidence that such a self-consistent anomalous transport model is required for describing the implosion behaviour (characterized by diffuse current sheaths) in rapidly pulsed theta pinches is reviewed, together with the early attempts at modelling these implosions numerically with a one-fluid (MHD) model including artificial viscosity. It is shown that fluid-numerical simulations that include (at each space and time step) the effects of anomalous transport in a fully self-consistent manner, explain several features of the experimental observations. The relevance of reflected ions to sheath structure and implosion dynamics is also discussed, and state-of-the-art hybrid-numerical studies (Vlasov ions and fluid electrons) of pinch implosions are presented, which include reflected ion dynamics as well as the anomalous transport associated with cross-field instabilities. Finally, instability mechanisms for producing long-time interpenetration of plasma and magnetic field in post-implosion theta pinches are discussed, together with estimates of the anomalous resistivity.

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Section: Z © CCmentioning

confidence: 97%

Anomalous transport in high-temperature plasmas with applications to solenoidal fusion systems

Davidson

Krall²

1977

Nucl. Fusion

233

118

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“…A general dispersion relation governing the dynamics of the high frequency, i.e. ω ci << ω << ω ce , electromagnetic drift waves has been derived long ago by Detyna and Wooding [14] along with the stability analysis. Detyna and Wooding [15] have also derived a dispersion relation for the ultra high frequency drift waves due to an electron stream drifting through a density gradient in a plasma.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamical modelling of high frequency electrostatic drift waves using fluid theoretical approach in magnetized plasma

Acharya¹,

Janaki²

2022

Preprint

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“…In the traditional theory of LHDI, the impact of the guide field is ignored. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] An exception may be the work by Daughton,29 who performed formally exact linear Vlasov analysis for nonuniform geometry including the guide field.…”

Section: Introductionmentioning

confidence: 99%

Theory and simulation of lower-hybrid drift instability for current sheet with guide field

et al. 2008

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The stability of a thin current sheet with a finite guide field is investigated in the weak guide-field limit by means of linear theory and simulation. The emphasis is placed on the lower-hybrid drift instability (LHDI) propagating along the current flow direction. Linear theory is compared against the two-dimensional linear simulation based on the gyrokinetic electron/fully kinetic ion code. LHDI is a flute mode characterized by k⋅Btotal=0; hence, it is stabilized by a finite guide field if one is confined to k vector strictly parallel to the cross-field current. Comparison of the theory and simulation shows qualitatively good agreement.

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High frequency electromagnetic drift waves

Cited by 10 publications

References 5 publications

Anomalous transport in high-temperature plasmas with applications to solenoidal fusion systems

Anomalous transport in high-temperature plasmas with applications to solenoidal fusion systems

Nonlinear dynamical modelling of high frequency electrostatic drift waves using fluid theoretical approach in magnetized plasma

Theory and simulation of lower-hybrid drift instability for current sheet with guide field

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