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射频波可以进入聚变等离子体,通过无碰撞机制将能量和动量沉积于其中,在加热等离子体的同时,还可以驱动等离子体电流和等离子体流.等离子体电流的非感应维持是托卡马克类型聚变装置稳态运行的关键,而电流剖面的控制及等离子体流的存在对于抑制磁流体不稳定性、建立和维持高性能的约束模式至关重要,因此射频波电流驱动和流驱动在磁约束聚变等离子体物理研究中有重要意义.本文从等离子体中波与粒子相互作用的基本物理出发,对磁约束等离子体中射频波电流驱动和流驱动的研究现状、面临的挑战、以及可能的研究趋势进行了简要评述.几个关键问题被特别指出,包括:共振吸收机制与高密度下射频波电流驱动效率衰减的内在联系;非共振驱动机制的可行性探讨;从动量获取和动量弛豫的平衡关系出发探索共振机制下提高驱动效率的可能性;流驱动中射频波的直接驱动和间接驱动效应,尤其是射频波有质动力效应;射频波耦合和传播过程中复杂的非线性过程对电流驱动和流驱动的影响等.
The RF waves can enter the fusion plasma where energy and momentum are deposited through a collision-free mechanism that drives the plasma current and the plasma flow while heating the plasma.The non-inductive maintenance of the plasma current is of the Tokamak type The key to the steady state operation of the fusion device is the control of the current profile and the presence of the plasma flow, which are crucial for suppressing the magneto-fluid instability and establishing and maintaining high-performance confinement modes. Therefore, the RF-wave current drive and the flow-driven magnetic confinement Fusion plasma physics research is of great significance.In this paper, starting from the basic physics of the interaction between wave and particle in plasma, the research status, challenges and possible challenges of RF wave current driving and flow driving in magnetic confinement plasma A few key issues are highlighted, including: the intrinsic relationship between the resonance absorption mechanism and decay efficiency of RF current driving at high density; the feasibility of non-resonant driving mechanism; the relationship between the momentum acquisition and momentum relaxation Balance relationship to explore the possibility of improving the driving efficiency under the resonance mechanism; Direct and indirect drive driving radio wave effect, particularly radio frequency waves ponderomotive effects; Effect of RF wave propagation during coupling and complex nonlinear process current drive and current drive, and the like.