Observation of fully detached divertor integrated with improved core confinement for tokamak fusion plasmas

Observation of fully detached divertor integrated with improved core confinement for tokamak fusion plasmas

Integration of divertor detachment with a high-performance (βN ∼ 3, βp > 2, H98 ∼ 1.5) core plasma has been demonstrated in DIII-D high-βp (poloidal beta) plasmas associated with a sustained core internal transport barrier (ITB) and an H-mode edge transport barrier (ETB). Such good core-edge inte...

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Veröffentlicht in:Physics of plasmas 2021-05, Vol.28 (5)
Hauptverfasser: Wang, H. Q., Wang, L., Ding, S., Garofalo, A. M., Gong, X. Z., Eldon, D., Guo, H. Y., Leonard, A. W., Hyatt, A. W., Qian, J. P., Weisberg, D. B., McClenaghan, J., Fenstermacher, M. E., Osborne, T. H., Lasnier, C. J., Watkins, J. G., Shafer, M. W., Grierson, B. A., Xu, G. S., Yan, Z., Mckee, G. R., Huang, J., Ren, J., Buttery, R. J., Humphreys, D. A., Thomas, D. M., Zhang, B., Liu, J. B.
Format: Artikel
Sprache:eng
Schlagworte:
Confinement
Flow velocity
Gas flow
Heat flux
Impurities
Neon
Nitrogen
Nuclear engineering
Nuclear safety
Performance degradation
Plasma
Plasma physics
Plasma temperature
Plasmas (physics)
Safety factors
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Zusammenfassung:Integration of divertor detachment with a high-performance (βN ∼ 3, βp > 2, H98 ∼ 1.5) core plasma has been demonstrated in DIII-D high-βp (poloidal beta) plasmas associated with a sustained core internal transport barrier (ITB) and an H-mode edge transport barrier (ETB). Such good core-edge integration has been achieved for both neon and nitrogen seeding, for both favorable and unfavorable B-field directions, independently from the impurity puffing locations, though these variations play important roles on divertor characteristics. Compared to the standard H-mode plasmas, the high-βp plasma exhibits a much wider window of detachment compatible with high confinement core. Fully detached divertor plasmas with low plasma temperature (Te 
ISSN:1070-664X
1089-7674
DOI:10.1063/5.0048428