New edge coherent mode providing continuous transport in long-pulse H-mode plasmas.
New edge coherent mode providing continuous transport in long-pulse H-mode plasmas.
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DOI：
10.1103/physrevlett.112.185004
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发表时间：
2014-05
影响因子：
8.6
通讯作者：
Huiqian Wang;Gang Xu;Baonian Wan;Siye Ding;Houyang Guo;L. Shao;Shaocheng Liu;X. Xu;E. W
中科院分区：
文献类型：
--
作者：
Huiqian Wang;Gang Xu;Baonian Wan;Siye Ding;Houyang Guo;L. Shao;Shaocheng Liu;X. Xu;E. W
An electrostatic coherent mode near the electron diamagnetic frequency (20-90 kHz) is observed in the steep-gradient pedestal region of long pulse H-mode plasmas in the Experimental Advanced Superconducting Tokamak, using a newly developed dual gas-puff-imaging system and diamond-coated reciprocating probes. The mode propagates in the electron diamagnetic direction in the plasma frame with poloidal wavelength of ∼8 cm. The mode drives a significant outflow of particles and heat as measured directly with the probes, thus greatly facilitating long pulse H-mode sustainment. This mode shows the nature of dissipative trapped electron mode, as evidenced by gyrokinetic turbulence simulations.
