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

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

Princeton University. Plasma Physics Laboratory.

关键词: Bootstrap Current;    70 Plasma Physics And Fusion Technology;    Stored Energy Edge Plasma;    Edge Plasma;    Divertors;   

DOI  :  10.2172/827941
RP-ID  :  PPPL-3954
RP-ID  :  AC02-76CH03073
RP-ID  :  827941

美国|英语

来源: UNT Digital Library

【 摘 要 】

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 experiments