Theoretical explanation of I-mode impurity removal and energy confinement

Dataset · Thu Nov 01 04:00:00 EDT 2018

DOI:https://doi.org/10.7910/DVN/1CM1DY· OSTI ID:1880270

Espinosa, Silvia ^[1]; Catto, Peter J.

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1. OSTI

Improved (I) mode operation maintains the beneficial high energy confinement of high (H) mode while also providing natural fueling to compensate for impurity removal. We show outward collisional radial impurity flux is the robust distinguishing characteristic between I-mode and H-mode, rather than the turbulent weakly coherent mode that is sometimes undetected, perhaps due to its strong spatial localization. In both regimes the E x B flow shear observed may break up eddies to reduce the turbulence level, leading to good bulk energy confinement.

• Research Organization: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
• Sponsoring Organization: USDOE Office of Science (SC), Fusion Energy Sciences (FES)
• DOE Contract Number: FG02-91ER54109
• OSTI ID: 1880270
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY