关键词: 单零偏滤器, 任意电流剖面, 偏滤器品质

Abstract: Characteristics of the single-null divertor configuration of theHL-2Atokamak are studied by using the in- tegral approach for various current profiles. The advantage of this approach is its suitability for solving the free boundary Grad-Shafranov equationwith X-points for arbitrary current profile. For theHL-2Atokamak, the required disposal of the currents in different poloidal coils (the vertical field coils, the three mult-i polar coils, the compensated mult-i polar coils and the horizontal coils) can be appropriately determined through a few iterations under a reasonable initial assumption about the plasma boundary. The boundary of the single-null diverted plasma in the HL-2A tokamak is simply a circular one plus a local triangular deformation near the X-point. The merit of this divertor configuration is studied by following several magnetic field lines in the scrape-off layer.

Key words: Single-null divertor, Arbitrary current profile, Divertor merit