Abstract
Abstract
Effects of edge radial electric field
E
r
and
E
r
× B flow shear on edge turbulence and turbulent transport, in particular, on large-scale blobs and blobby transport have been investigated in the positive and negative biasing discharges in the J-TEXT tokamak. The results show that under certain conditions, the positive electrode biasing induces better plasma confinement than the negative biasing. Further studies reveal that in addition to flow shear effects on blob dynamics, the local radial electric field at the edge region plays a significant role in repulsion of the blobs and associated transport, leading to improvement of particle confinement when the outward motion of the blobs is blocked. The results are consistent with the existing theory on blob dynamics.
Funder
Science and Technology Plan Project
Sichuan International Science and Technology Innovation Cooperation Project
Key R&D Program of China
National Magnetic Confinement Fusion Science Program of China
National Natural Science Foundation of China
Subject
Condensed Matter Physics,Nuclear Energy and Engineering
Cited by
1 articles.
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