Active control of divertor asymmetry on EAST by localized D2 and Ar puffing
作者： Dongsheng Wang , Houyang Guo , Huiqian Wang , Guangnan Luo , Zhenwei Wu
DOI: 10.1063/1.3564962
关键词: Argon 、 Null (radio) 、 Asymmetry 、 Particle 、 Ohmic contact 、 Atomic physics 、 Plasma 、 Physics 、 Divertor 、 Active control
摘要: The divertor asymmetry in particle and power fluxes has been investigated on the EAST superconducting tokamak [S. Wu Team, Fusion Eng. Des. 82, 463 (2007)] for both single null (SN) double (DN) configurations. D2 Ar puffing at various locations also explored as an active means to reduce peak target heat load control asymmetry. For SN, outer is 2–3 times that inner under typical ohmic plasma conditions. DN operation leads a stronger in-out favoring divertor. promotes partial detachment near strike points, greatly reducing (over 50%), while far-SOL remains attached. What remarkable flux even increased away from points when B×∇B drift directed toward target, thus facilitating removal.
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