Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10645123 | Journal of Nuclear Materials | 2011 | 6 Pages |
Abstract
The first systematic assessment of divertor performance was made in the EAST superconducting tokamak for both single null (SN) and double-null (DN) divertor configurations under Ohmic and L-mode plasma conditions. Particle and heat fluxes are higher at outboard divertor targets than those at inboard divertor targets for both SN and DN. However, the DN divertor configuration exhibits a much stronger in-out asymmetry favoring outer divertors. DN operation also leads to an up-down asymmetry with higher particle fluxes to the divertors with their âB drift toward the X-point. Reversing toroidal field direction shows a strong influence on the divertor asymmetries. The plasma exhibits a large amplitude broadband turbulence in the outer divertors for both SN and DN, which is significantly reduced in the inner divertors, especially for DN. This coincides with a broad divertor SOL profile on the outboard side. Initial comparisons are also made with SOLPS-B2/EIRENE modeling.
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Authors
H.Y. Guo, X. Gao, J. Li, G.-N. Luo, S. Zhu, J.F. Chang, Y.P. Chen, W. Gao, X.Z. Gong, Q.S. Hu, Q. Li, S.C. Liu, T.F. Ming, J. Ou, Y.J. Shi, B.N. Wan, D.S. Wang, H.Q. Wang, W. Zhang,