驱动等离子体电流是当前聚变研究中的一项重要课题,其目标是借以建立稳态运行的托卡马克反应堆。利用低杂波来驱动电流是主要方案之一,近来取得了重大进展。但是,在目前的实验中,低杂波只在较低的等离子体密度下才能有效地驱动电流,其密度极限远低于反应堆所要求的密度。对于这种现象,目前尚无适当的解释。如果不能突破这种密度限制,建立波驱动的稳态托卡马克反应堆的方案将成为泡影。 Driving plasma current is an important issue in current fusion research, with the goal of establishing a tokamak reactor that operates in steady state. Using low-noise to drive the current is one of the major programs and significant progress has recently been made. However, in current experiments, low clutter effectively drives current only at lower plasma densities, with densities well below the reactor densities. There is no proper explanation for this phenomenon. If this density limit can not be exceeded, the proposal to build a wave-driven, steady-state tokamak reactor will come to naught.