AbstractA major goal of the Large Helical Device (LHD) Project is to demonstrate a high potential for the Heliotron-type device to produce current-less-steady-state plasmas with a large Lawson parameter but without any hazardous plasma current disruption. The LHD is a superconducting toroidal device with a continuous helical divertor as a powerful edge control tool. Its major radius, and maximum magnetic field strength are 3.9 m and 4 Tesla, respectively. It has l/m=2/10, SC helical coils and three sets of SC poloidal coils, of which coil currents and the stored energy are 7.8, 5.0, −4.5, −4.5, and 1.6 GJ, respectively. SC is the major technological issue of the LHD project. The LHD has now successfully completed the seventh year of an eight year construction schedule. Engineering research and development necessary for the LHD construction have almost reached completion, and we have now accomplished more than 80% of a tough and long construction schedule. The detailed planning of the practical experiments is progressing to accelerate the buildup of the initial experiments in conjunction with many collaborators at universities and other institutions.
大型螺旋装置（LHD）项目的一个主要目标是展示螺旋型装置在产生无电流稳态等离子体方面的巨大潜力，并实现较大的劳森参数，同时避免任何危险的等离子体电流中断。LHD是一台超导环形装置，配备连续螺旋偏滤器，作为强大的边缘控制工具。其大半径和最大磁场强度分别为3.9米和4特斯拉。该装置采用l/m=2/10的超导螺旋线圈，并配备三组超导极向线圈，其线圈电流和储存能量分别为7.8、5.0、−4.5、−4.5和1.6吉焦耳。超导技术是LHD项目的主要技术挑战。目前，LHD已成功完成了为期八年的建设计划中的第七年。LHD建设所需的工程研发已基本完成，我们现已完成了艰巨而漫长的建设计划的80%以上。实用实验的详细规划正在推进中，以加速与大学及其他机构的众多合作者共同开展初期实验。