Unstable Drift Waves in a Sheared Magnetic Field

Lee, W.W.; Nevins, W. M.; Okuda, H.; White, R. B.

doi:10.1103/physrevlett.43.347

Cited by 12 publications

(4 citation statements)

References 13 publications

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“…At quasilinear saturation e<p/kT e^ l/k±L n (L n is the density scale length) which yields n/n 0 = 1-2%. More sophisticated treatments such as that by Lee et al 13 also predict fluctuation levels in this range. The radial variation of n/n 0 of Fig.…”

Section: [\N(rt)\ 2 )~Njs(k)d 3 Kmentioning

confidence: 89%

Study of Low-Frequency Microturbulence in the Microtor Tokamak by Far-Infrared Laser Scattering

et al. 1980

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terns where the above effect can be seen. A candidate for the first case would be the excited line in Cu 2 0 where the values of the parameters predict a large effect with crucial consequences on the interpretation of some experiments on the excitons and biexcitonic states using counterpropagating beams. In a different context the soft modes near a paraelectric-to-ferroelectric transition in a crystal will be another interesting system; these modes are highly anharmonic and the damping will play a very crucial role.(a . 7 When one takes into account damping but still neglects the out-of-phase component inQ 0 , r\ near r 2 approaches 9A 2 T 2 . The out-of-phase component cannot be neglected near r 1 . At and very near the critical points, the expansion Q =Q 0 + 6Q and Eqs. (4) and (8) as well as the mean-field approximation cannot be used. The detailed behavior near the critical points and the implications of the near-field approximation are being investigated and the results will be reported elsewhere. 8 B. A. Huberman and J. P 0 Crutchfield, Phys. Rev.

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Section: [\N(rt)\ 2 )~Njs(k)d 3 Kmentioning

confidence: 89%

Study of Low-Frequency Microturbulence in the Microtor Tokamak by Far-Infrared Laser Scattering

et al. 1980

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“…It is known that this situation is exceptionally rare in Angiosperms. It is also observed in Viola, Oxalis and Lespedeza flowers, where pollen germinates in anther locus (Lee et al, 1979). With the studies carried out in Linum hirsutum L., it was identified that pollen grains germinate and form the pollen tubes inside the anther (Ünal and Yıldırım, 1995).…”

Section: Pollen Morphology and Pollen Viabilitymentioning

confidence: 99%

Structural Analysis of Reproductive Development in Staminate Flowers of Laurus nobilis L.

AYTÜRK¹,

Ünal²

2012

Not Sci Biol

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Male (staminat) flower development, being separated in 8 phases, was investigated in Laurus nobilis (Lauraceae) through the usage of histological sections and scanning electron microscopy (SEM) analysis. Flower development starts when apical meristem differentiates, followed by the conversion of this structure to floral meristem. Initial development phases comprise incidents similar to the ones of the female flower. 4 tepals and 8-10 stamens primordia develop through floral meristem in turn. In early stages of the development, sexual dimorphism occurs when the carpel primordium arrests. Filaments carry 2 nectaries in stamens which arise in 3 whorls. Anther wall consists of epidermis, endothecium, 2 or 3 middle layers and a single-layered glandular tapetum. Anthers are bisporangiate. Meiotic division is regular in pollen mother cells, and pollen grains do not contain aperture. Beside the pollen scattered individually within the pollen sacs, groups which contain some pollen tied to each other are rarely observed, as well. Pollen grains seldom germinate within microsporangium. Anthers are opened with 2 valves which widen from the base through the top. Accumulation of polysaccharides, lipids and proteins were identified by histochemical methods in stamens. These organic substances are greater within and around the vascular bundle compared to other tissues.

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“…Here, the f -ion flow in principle implies a current that might cause a sheared magnetic field component B s = µ 0 en f 0 v f 0 L s , where L s is the characteristic shear length, which is known to stabilize the drift wave itself [17,23]. However, for parameters used in the text the sheared component is negligible; at the perpendicular distance L s = L n it remains below 0.001B 0 .…”

Section: B Flowing Ions Casementioning

confidence: 99%

Drift wave stabilized by an additional streaming ion or plasma population

Bashir

Vranjes

2015

Phys. Rev. E

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It is shown that the universally unstable kinetic drift wave in an electron-ion plasma can very effectively be suppressed by adding an extra flowing ion (or plasma) population. The effect of the flow of the added ions is essential, their response is of the type, where v f 0 is the flow speed and v ph phase speed parallel to the magnetic field vector. The damping is strong and it is mainly due to this ion exponential term, and this remains so for v f 0 < v ph .

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Unstable Drift Waves in a Sheared Magnetic Field

Cited by 12 publications

References 13 publications

Study of Low-Frequency Microturbulence in the Microtor Tokamak by Far-Infrared Laser Scattering

Study of Low-Frequency Microturbulence in the Microtor Tokamak by Far-Infrared Laser Scattering

Structural Analysis of Reproductive Development in Staminate Flowers of Laurus nobilis L.

Drift wave stabilized by an additional streaming ion or plasma population

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