Observation of a High Performance Operating Regime with Small Edge-Localized Modes in the National Spherical Torus Experiment | Zendy

R. Maingi | Zendy; K. Tritz | Zendy; E. Fredrickson | Zendy; J.E. Menard | Zendy; S.A. Sabbagh | Zendy; D. Stutman | Zendy; M.G. Bell | Zendy; R.E. Bell | Zendy; C.E. Bush | Zendy; D. Gates | Zendy; D.W. Johnson | Zendy; R. Kaita | Zendy; S.M. Kaye | Zendy; H. Kugel | Zendy; B. LeBlanc | Zendy; D. Mueller | Zendy; Rajesh N. Raman | Zendy; A. L. Roquemore | Zendy; V.A. Soukhanovskii | Zendy

Open Access

Observation of a High Performance Operating Regime with Small Edge-Localized Modes in the National Spherical Torus Experiment

Author(s) -

R. Maingi,

K. Tritz,

E. Fredrickson,

J.E. Menard,

S.A. Sabbagh,

D. Stutman,

M.G. Bell,

R.E. Bell,

C.E. Bush,

D. Gates,

D.W. Johnson,

R. Kaita,

S.M. Kaye,

H. Kugel,

B. LeBlanc,

D. Mueller,

Rajesh N. Raman,

A. L. Roquemore,

V.A. Soukhanovskii

Publication year - 2004

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/827941

Subject(s) - divertor , torus , scaling , perturbation (astronomy) , fusion , physics , enhanced data rates for gsm evolution , line (geometry) , computational physics , plasma , geometry , tokamak , nuclear physics , mathematics , computer science , telecommunications , linguistics , philosophy , quantum mechanics

We report observation of a high performance scenario in the National Spherical Torus Experiment with very small edge-localized modes (ELMs). These ELMs have no measurable impact on stored energy and are consistent with high bootstrap current operation with line average density approaching Greenwald scaling. The ELM perturbation is observed to typically originate near the lower divertor region, as opposed to the outer midplane for ELMs described in the literature. If extrapolable, this scenario would provide an attractive operating regime for next step fusion experiment

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