低杂波高场侧发射的 Alpha 粒子通道效应
Alpha Channeling with High-field Launch of Lower Hybrid Waves
AI总结：
本文通过射线追踪模拟，量化计算了在与热离子模式聚变反应堆一致的温密状态下，从托卡马克高场侧发射低杂波以实现波放大所需的径向 alpha 粒子产生梯度，验证了该方法的可行性。
摘要：
尽管低杂波在当今托卡马克中能有效驱动电流，但在外推至反应堆时，预计它们会与高能粒子发生强烈的相互作用。在存在径向 alpha 粒子产生梯度的情况下，这种相互作用可能表现为波放大而非阻尼。虽然已知这种放大在从托卡马克高场侧发射时更容易发生，但放大的程度尚未被量化。在此，通过追踪从托卡马克高场侧发射的射线，计算了在与热离子模式聚变反应堆一致的温度和密度状态下实现放大所需的径向梯度。这些模拟虽然仅在波放大的线性区域内有效，但依然展示了利用低杂波高场侧发射实现波放大的可能性。
英文摘要：
Although lower hybrid waves are effective at driving currents in present-day tokamaks, they are expected to interact strongly with high-energy particles in extrapolating to reactors. In the presence of a radial alpha particle birth gradient, this interaction can take the form of wave amplification rather than damping. While it is known that this amplification more easily occurs when launching from the tokamak high-field side, the extent of this amplification has not been made quantitative. Here, by tracing rays launched from the high- field-side of a tokamak, the required radial gradients to achieve amplification are calculated for a temperature and density regime consistent with a hot-ion-mode fusion reactor. These simulations, while valid only in the linear regime of wave amplification, nonetheless illustrate the possibilities for wave amplification using high-field launch of the lower hybrid wave.
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