发表机构
Marathon Fusion（马拉松聚变）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究基于近期点火相关工作，发现单次使用的克量级自旋极化燃料可使磁约束聚变等离子体进入并维持高增益状态，还能提升等离子体性能，为自旋极化燃料源的扩展应用开辟了路径。
AI 中文摘要
基于Delgado-Aparicio、Ono和Menard近期的点火相关研究，我们表明，即使是单次使用的克量级自旋极化燃料（SPF），也可用于提升托卡马克、仿星器等磁约束聚变装置的聚变功率与增益。虽然聚变电站连续使用SPF燃料每日需约千克量级，远超当前能力，但单次短脉冲SPF可使聚变等离子体进入高增益状态，且在切换回常规未极化燃料后仍能维持。连续极化燃料注入时，极化还能让高增益等离子体更易控制：使燃料去极化的共振波会以远快于输运的时间尺度快速降低反应性。因此，克量级极化燃料可改善等离子体性能，并为将SPF源与应用从首次小型实验扩展至连续燃料注入开辟路径。
英文摘要
Building on recent ignition-access work of Delgado-Aparicio, Ono, and Menard, we show that even a single-use, gram-scale quantity of spin-polarized fuel (SPF) is useful for increasing fusion power and gain in magnetic confinement fusion machines such as tokamaks and stellarators. While fueling a fusion power plant continuously with SPF requires $\sim$kilograms per day, far beyond present capabilities, a single-use short pulse of SPF allows a fusion plasma to cross into a high-gain regime, and stay there, even after switching back to regular unpolarized fuel. With continuous polarized fueling, polarization also makes high-gain plasmas easier to control: a resonant wave that depolarizes the fuel lowers the reactivity quickly, on a much faster timescale than transport. Grams of polarized fuel can therefore improve plasma performance and open a path to scaling SPF sources and usage, from small first experiments to continuous fueling.
Comments10 pages, 6 figures
