2001
DOI: 10.1088/0741-3335/43/10/307
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Ion-temperature-gradient modes in stellarator geometry

Abstract: The ion-temperature-gradient (ITG)-driven drift mode is studied in threedimensional stellarator geometry using a two-fluid reactive model in the electrostatic limit. The model includes first-order FLR effect in the presence of parallel ion dynamics and using the Boltzmann distribution for the electrons. The resulting eigenvalue is solved numerically using the ballooning mode theory. The results are contrasted with the corresponding tokamak results with positive shear. In stellarators, the level of the maximum … Show more

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Cited by 18 publications
(22 citation statements)
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“…The drift wave equation is solved by a shooting algorithm using a sixth-order Numerov scheme and WKB-type boundary conditions and by demanding continuity of the function at its first derivative at a matching point. Details of the boundary conditions and the numerical method used are given in [23].…”
Section: Numerical Results and Discussionmentioning
confidence: 99%
“…The drift wave equation is solved by a shooting algorithm using a sixth-order Numerov scheme and WKB-type boundary conditions and by demanding continuity of the function at its first derivative at a matching point. Details of the boundary conditions and the numerical method used are given in [23].…”
Section: Numerical Results and Discussionmentioning
confidence: 99%
“…The model used is an advanced fluid model for ITG modes [19] including effects of elongated flux surfaces. Previous work using this model indicates that the ITG growth is rather insensitive to the shape of the flux surface [21] - [22]. The analytical technique used here closely follow Ref.…”
Section: Introductionmentioning
confidence: 98%
“…Actually, a number of ITG modes with unconventional ballooning mode structures, characterized by peaking at arbitrary poloidal positions, have been observed in simulations [1,2,13,17,18]. These were considered as possible candidates to explain the transport in TBs.…”
Section: Introductionmentioning
confidence: 99%