The stellarator Wendelstein 7-X (W7-X) is presently under construction at Greifswald, Germany, and the start of operation is planned in 2006. W7-X is a large `advanced stellarator' of the HELIAS type (R = 5.5 m, a = 0.55 m, B0 = 3 T, five periods, moderate shear and variable rotational transform 5/6 ⩽ ι ⩽ 5/4 at the boundary) with the aims of demonstratingthe reactor potential of this stellarator line in steady state operation close to fusion relevant parameters. The capability of stationary operation requires the realization of a superconducting magnet system consisting of 50 modular coils and 20 planar coils, the operation of a 140 GHz ECR CW heat source of 10 MW, the installation of a divertor to handle the power and particle flux, and to limit the impurity fraction to tolerable levels. Additional heating schemes, ICRF and NBI, will be provided for flexible experimentation.
恒星状器Wendelstein 7-X（W7-X）目前正在德国格赖夫斯瓦尔德建造，计划于2006年开始运行。W7-X是一个大型“先进恒星状器”，属于HELIAS类型（R = 5.5 m，a = 0.55 m，B0 = 3 T，五个周期，中等剪切，边界处旋转变换5/6 ⩽ ι ⩽ 5/4），其目标是在接近聚变相关参数的稳态运行条件下，展示该恒星状器系列的反应堆潜力。稳态运行的能力要求实现由50个模块化线圈和20个平面线圈组成的超导磁体系统，运行10 MW的140 GHz ECR连续波热源，安装偏滤器以处理功率和粒子通量，并将杂质份额限制在可容忍的水平。还将提供额外的加热方案，即ICRF和NBI，以支持灵活的实验。