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Kinetic water-bag model of global collisional drift waves and ion temperature gradient instabilities in cylindrical geometry

Abstract : Collisional drift waves and ion temperature gradient (ITG) instabilities are studied using a linear water-bag kinetic model [P. Morel et al., Phys. Plasmas 14, 112109 (2007)]. An efficient spectral method, already validated in the case of drift waves instabilities [E. Gravier et al., Eur. Phys. J. D 67, 7 (2013)], allows a fast solving of the global linear problem in cylindrical geometry. The comparison between the linear ITG instability properties thus computed and the ones given by the COLUMBIA experiment [R. G. Greaves et al., Plasma Phys. Controlled Fusion 34, 1253 (1992)] shows a qualitative agreement. Moreover, the transition between collisional drift waves and ITG instabilities is studied theoretically as a function of the ion temperature profile.
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Submitted on : Friday, March 11, 2016 - 5:40:01 PM
Last modification on : Monday, December 13, 2021 - 1:52:03 PM

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Etienne Gravier, Emmanuel Plaut. Kinetic water-bag model of global collisional drift waves and ion temperature gradient instabilities in cylindrical geometry. Physics of Plasmas, American Institute of Physics, 2013, 20 (4), 042105 / 8p. ⟨10.1063/1.4799814⟩. ⟨hal-01287079⟩

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