DOI: 10.1063/1.859197. Properties of ion temperature gradient drift instabilities in <i>H</i>-mode plasmas

Properties of ion temperature gradient drift instabilities in H-mode plasmas

10.1063/1.859197

Crossref journal-article

AIP Publishing

Physics of Fluids B: Plasma Physics (317)

Abstract

Experimental results from tokamaks such as DIII-D [Phys. Fluids 31, 3738 (1988)] and JET [Proceedings of the 15th European Conference on Controlled Fusion and Plasma Heating (European Physical Society, Budapest, 1988), Vol. 12B, Part 1, p. 2239] have indicated that the electron density profile in H-mode (‘‘high confinement’’) discharges can be nearly flat over most of the plasma and in some cases, even inverted (outwardly peaked). These conditions have very interesting implications for pictures of anomalous thermal transport, based on the presence of ion temperature gradient (ηi ) drift instabilities. The present paper includes (i) a new derivation of the ion temperature gradient threshold for weak density grandient ηi modes when ion transit resonances are taken into account; and (ii) the first derivation of threshold conditions for the onset of ηi modes when ηi is negative, along with the properties of these negative ηi instabilities when the thresholds are exceeded. Possible consequences for confinement in H-mode plasmas are discussed.

Bibliography

Hahm, T. S., & Tang, W. M. (1989). Properties of ion temperature gradient drift instabilities in H-mode plasmas. Physics of Fluids B: Plasma Physics, 1(6), 1185â1192.

Authors 2

T. S. Hahm (first)
W. M. Tang (additional)

References 34 Referenced 127

{'key': '2023080202342030900_r1'}
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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 9:14 a.m.)
Deposited	2 years, 1 month ago (Aug. 1, 2023, 10:35 p.m.)
Indexed	2 hours, 14 minutes ago (Sept. 4, 2025, 9:45 a.m.)
Issued	36 years, 3 months ago (June 1, 1989)
Published	36 years, 3 months ago (June 1, 1989)
Published Print	36 years, 3 months ago (June 1, 1989)

Funders 0

None

BibTeX

@article{Hahm_1989, title={Properties of ion temperature gradient drift instabilities in H-mode plasmas}, volume={1}, ISSN={0899-8221}, url={http://dx.doi.org/10.1063/1.859197}, DOI={10.1063/1.859197}, number={6}, journal={Physics of Fluids B: Plasma Physics}, publisher={AIP Publishing}, author={Hahm, T. S. and Tang, W. M.}, year={1989}, month=jun, pages={1185–1192} }

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