Ion Heating Due to Collisionless Drift-Wave Turbulence

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

doi:10.1143/jpsj.49.845

Cited by 19 publications

(2 citation statements)

References 5 publications

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“…For low electron drift velocity, the measured dispersion relations of the wave were found to be consistent with the linear theory of the current-driven collisionless drift instability. The temperature of the ions was observed to increase anisotropically concomitant with the growth of the drift wave [3].…”

Section: Introductionmentioning

confidence: 99%

“…One more important finding is the anisotropic ion heating by this current-driven collisionless drift wave [2,3]. The ion temperature T i⊥ perpendicular to the magnetic-field lines is preferentially heated as compared to the parallel ion temperature T i// , as the electron drift velocity u is increased, and its heating becomes stronger from the center toward the radial-edge area.…”

Section: Introductionmentioning

confidence: 99%

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Collisionless Drift Waves Ranging from Current‐Driven, Shear‐Modified, and Electron‐Temperature‐Gradient Modes

Hatakeyama

Moon

Tamura

et al. 2010

Contrib. Plasma Phys.

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The specific history of collisionless drift waves is marked by focusing upon current-driven, shear-modified, and electron-temperature-gradient modes. Studies of current-driven collisionless drift waves started in 1977 using the Innsbruck Q machine and was continued over 30 years until 2009 with topics such as plasma heating by drift waves in fusion-oriented confinement and space/astrophysical plasmas. Superposition of perpendicular flow velocity shear on parallel shear intensively modifies the drift wave characteristics through the variation of its azimuthal structure, where the parallel-shear driven instability is suppressed for strong perpendicular shears, while hybrid-ion velocity shear cause unexpected stabilization of the parallel-shear-modified drift wave. An electron temperature gradient can be formed easily by control of thermionic electron superimposed on ECR plasma, and is found to excite low-frequency fluctuation in the range of drift waves.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Collisionless Drift Waves Ranging from Current‐Driven, Shear‐Modified, and Electron‐Temperature‐Gradient Modes

Hatakeyama

Moon

Tamura

et al. 2010

Contrib. Plasma Phys.

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Microwave Measurements of the Thermal Expansion of Organic Metals

Miane

Carmona

Delhaès

1982

Physica Status Solidi (b)

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The thermal expansion of organic metals is measured by the Buravov-Shchegolev method (microwave cavity at 9.5 GHz). A relation is found between the frequency shift of the cavity and the length of the sample, independent of the skin depth in the sample. The linear thermal expansion coefficients "b are measured along the organic chains in charge transfer complexes (TTF-TCNQ, HXTTF-TCNQ) and ion radical salts (TMTTF,-I, TMTSeF,-ClO,, TTT,-I, and TSeT,-I). Organic metals with TTF and its selenium analog TSeF show large coefficients for bi-chain compounds (like TTF-TCNQ) as well as for monochain compounds (like TMTSeF,-ClO,). These metals are found to exhibit strong anharmonic effects leading to a T Z law for the electrical resistivity (Weger's model). On the contrary metals with TTT or TSeT have weak coefficients ab and their electric properties are more similar to those of inorganic metals (their resistivity follows a Bloch-Griineisen law with Q cc T ) .Nous ,utilisons la mBthode de Buravov et Shchegolev (perturbation d'une cavitB microonde 9,s GHz) adaptke B la mesure des dilatations thermiques de mBtaux organiques. Nous proposons une relation entre la frequence de resonance de la cavitB et la longueur de 1'Bchantillon en forme d'ellipsoide allongk, relation independante de la profondeur de pimetration de l'onde dans 1'Bchantillon. Nous avons mesure les coefficients de dilatation thermique linbaire ab paralklement aux chaines organiques dans les complexes B transfert de charges (C.T.C.) TTF-TCNQ, HNTTF-TCNQ et les sels d'ions radicaux (S.I. R.) TMTTF,-I, TMTSeF,CIO,, TTT,I, et TSeT,-I. Les mktaux B base de TTF ou de son homologue s6leniB presentent de forts coefficients de dilatation thermique aussi bien pour les composks bichaines (TTF-TCNQ, HNTTF-TCNQ) que pour les monochaines (TNTTF,-I, TMTSeF,-ClO,). Ces mdtaux prbsentent une forte anharmonicit6 conduisant B une loi en T 2 pour la resistivitk Blectrique (modele de Weger). Au contraire dans les mBtaux ZL base de TTT et TSeT, les faibles dilatations observQs montrent que les effects anharmoniques sont beeucoup moins importants et leur rksistivitB Blectrique se rapproche de la loi classique de BlochGruneisen ( Q oc T ) .

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Transport in amorphen und organischen Halbleitern sowie persistenten Photoleitern

Seeger

1992

Halbleiterphysik

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Ion Heating Due to Collisionless Drift-Wave Turbulence

Cited by 19 publications

References 5 publications

Collisionless Drift Waves Ranging from Current‐Driven, Shear‐Modified, and Electron‐Temperature‐Gradient Modes

Collisionless Drift Waves Ranging from Current‐Driven, Shear‐Modified, and Electron‐Temperature‐Gradient Modes

Microwave Measurements of the Thermal Expansion of Organic Metals

Transport in amorphen und organischen Halbleitern sowie persistenten Photoleitern

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