Nonresonant Diffusion in Alpha Channeling

电流驱动与Alpha通道化介导的旋转驱动中的动量守恒

Momentum Conservation in Current Drive and Alpha-Channeling-Mediated Rotation Drive

本文针对alpha channeling旋转驱动中的动量守恒问题，构建了自洽的准线性理论，揭示了非共振粒子对随时间增长的平面波与具有非均匀空间结构的稳态波反应的根本差异，从而解释了稳态波如何驱动旋转。

Alpha Channeling in a Rotating Plasma

The wave-particle alpha-channeling effect is generalized to include rotating plasma. Specifically, radio frequency waves can resonate with alpha particles in a mirror machine with ExB rotation to diffuse the alpha particles along constrained paths in phase space. Of major interest is that the alpha-particle energy, in addition to amplifying the RF waves, can directly enhance the rotation energy which in turn provides additional plasma confinement in centrifugal fusion reactors. An ancillary benefit is the rapid removal of alpha particles, which increases the fusion reactivity.

Coupling of alpha-channeling to parallel wavenumber upshift in lower hybrid current drive

Although lower hybrid waves have been shown to be effective in driving plasma current in present-day tokamaks, they are predicted to strongly interact with the energetic alpha particles born from fusion reactions in eventual tokamak reactors. However, in the presence of the expected steep alpha particle birth gradient, this interaction can produce wave amplification rather than wave damping. Here, we identify the flexibilities and constraints in achieving this amplification effect through a consideration of symmetries in the channeling interaction, in the wave propagation, and in the tokamak f…

利用自旋极化燃料增强α粒子输运

Enhanced alpha channeling with spin-polarized fuel

研究氘 - 氚燃料自旋状态对聚变影响，提出自旋极化燃料增强α粒子输运的两种方式，通过速度空间计算等方法得出其能提高输运效率及聚变功率，还能快速输送氦到偏滤器，为聚变研究提供新思路。

Core localized alpha-channeling via low frequency Alfven mode generation in reversed shear scenarios

A novel channel for fuel ions heating in tokamak core plasma is proposed and analyzed using nonlinear gyrokinetic theory. The channel is achieved via spontaneous decay of reversed shear Alfven eigenmode (RSAE) into low frequency Alfven modes (LFAM), which then heat fuel ions via collisionless ion Landau damping. The conditions for RSAE spontaneous decay are investigated, and the saturation level and the consequent fuel ion heating rate are also derived. The channel is expected to be crucial for future reactors operating under reversed shear configurations, where fusion alpha particles are gene…

反剪切位形下通过低频阿尔芬模激发实现芯部局域阿尔法通道

Core localized alpha-channeling via low frequency Alfven mode generation in reversed shear scenarios

本文提出一种托卡马克芯部燃料离子加热新机制，即反剪切阿尔芬本征模自发衰变为低频阿尔芬模并通过朗道阻尼加热离子，推导了相关条件与加热率，对未来反剪切聚变堆具有重要意义。