球形托卡马克装置SUNIST的建立

Construction of the Sino United Spherical Tokamak

2002年建成的SUNIST球形托卡马克装置是中国第1台低环径比(R／a≈1.3)的托卡马克装置,具有氟橡胶交叉密封和电绝缘的结构。该装置主要设计参数为:大半径0.3 m,小半径0.23 m,自然拉长比1.6,截面中心磁场0.15 T和等离子体电流50 kA。在初步的欧姆加热实验中已得到了等离子体电流为52 kA的可重复放电。

The Sino United Spherical Tokamak (SUNIST), built in 2002, is the first Tokamak device with a low aspect ratio (R/α1.3). It has a structure of viton cross-sealing and electric insulation. The nominal parameters are as follows: major radius R=30 cm, minor radius α=23 cm, natural elongation k1.6, aspect ratio R/α1.3, on-axis toroidal field BT=0.15 T and plasma current Ip= 50 kA. Reproducible discharge with plasma current of 52 kA has been achieved in initial ohmic heating experiments.