DOI: 10.1063/1.860871. Two-stage turbulence suppression and <b>E</b>×<b>B</b> velocity shear measured at the L

Two-stage turbulence suppression and E×B velocity shear measured at the L–H transition

10.1063/1.860871

Crossref journal-article

AIP Publishing

Physics of Fluids B: Plasma Physics (317)

Abstract

At the onset of the L–H transition in the DIII-D tokamak [Plasma Physics and Controlled Nuclear Fusion Research, 1986 (International Atomic Energy Agency, Vienna, 1987), Vol. I, p.159], a fast (≊100 μsec) suppression of microturbulence is observed as the edge transport barrier is formed. This fast edge suppression is followed by a much slower (tens of msec), but substantial (≥50%) reduction in the relative density fluctuation level. This second turbulence suppression phase, which is observed to correlate with growing E×B velocity shear, has been localized to the plasma interior, and may explain why the observed transport reduction in the H mode has been observed to extend deep into the plasma, well beyond the edge transport barrier.

Bibliography

Philipona, R., Doyle, E. J., Luhmann, N. C., Peebles, W. A., Rettig, C. L., Groebner, R. J., Burrell, K. H., Gohil, P., Matsumoto, H., & Stambaugh, R. D. (1993). Two-stage turbulence suppression and EÃB velocity shear measured at the LâH transition. Physics of Fluids B: Plasma Physics, 5(1), 87â91.

Authors 10

R. Philipona (first)
E. J. Doyle (additional)
N. C. Luhmann (additional)
W. A. Peebles (additional)
C. L. Rettig (additional)
R. J. Groebner (additional)
K. H. Burrell (additional)
P. Gohil (additional)
H. Matsumoto (additional)
R. D. Stambaugh (additional)

References 31 Referenced 27

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:25 a.m.)
Deposited	2 years, 1 month ago (July 28, 2023, 4:46 a.m.)
Indexed	1 year, 6 months ago (Feb. 10, 2024, 2:25 p.m.)
Issued	32 years, 8 months ago (Jan. 1, 1993)
Published	32 years, 8 months ago (Jan. 1, 1993)
Published Print	32 years, 8 months ago (Jan. 1, 1993)

Funders 0

None

BibTeX

@article{Philipona_1993, title={Two-stage turbulence suppression and E×B velocity shear measured at the L–H transition}, volume={5}, ISSN={0899-8221}, url={http://dx.doi.org/10.1063/1.860871}, DOI={10.1063/1.860871}, number={1}, journal={Physics of Fluids B: Plasma Physics}, publisher={AIP Publishing}, author={Philipona, R. and Doyle, E. J. and Luhmann, N. C. and Peebles, W. A. and Rettig, C. L. and Groebner, R. J. and Burrell, K. H. and Gohil, P. and Matsumoto, H. and Stambaugh, R. D.}, year={1993}, month=jan, pages={87–91} }

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