远在受控聚变研究的早期阶段,就发现了受控聚变装置上的单极弧现象.但直到最近几年,这一现象才特别引起人们注意.这是因为,在一些托卡马克装置中又观察到单极弧的存在,而且在有的装置中,确认为金属杂质的主要来源.单极弧是由于放电室壁对等离子体所呈的负电位击穿的结果.在无磁场或磁场垂直表 Far from the early stages of controlled fusion studies, the phenomenon of unipolar arcs on controlled fusion devices was discovered, but this phenomenon was of particular interest until recent years because, in some tokamak devices Also observed in the presence of monopolar arc, and in some devices, identified as the main source of metal impurities.Unlar arc is due to the wall of the discharge chamber plasma negative potential as a result of the breakdown in the absence of a magnetic field or magnetic field Vertical table