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arXiv 0912.3550physics.plasm-ph
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托卡马克聚变堆的自然加料

Natural Fueling of a Tokamak Fusion Reactor

Weigang Wan, Scott E. Parker, Yang Chen, Francis W. Perkins

摘要:

讨论了托卡马克聚变堆维持主堆芯氘氚密度分布的自然加料机制。在由离子温度梯度(ITG)驱动的湍流主导的H模式等离子体中,边缘附近的冷DT离子将自然地朝向核心径向向内箍缩。这种机制是由于准中性热通量主导的ITG湍流的性质,仍然适用时,被困和通过动力学电子效应。使用浅弹丸喷射或超音速气体射流的燃料加注通过向内收缩的DT燃料来增强。使用三维环形电磁回旋湍流代码GEM演示了自然加油机制,并使用准线性理论进行了分析。配置文件类似于保守的ITER运输模型,有一个完全平坦的密度配置文件进行检查,它被发现,天然燃料实际上降低了线性增长率和能量传输。

英文摘要:

A natural fueling mechanism that helps to maintain the main core deuterium and tritium (DT) density profiles in a tokamak fusion reactor is discussed. In H-mode plasmas dominated by ion- temperature gradient (ITG) driven turbulence, cold DT ions near the edge will naturally pinch radially inward towards the core. This mechanism is due to the quasi-neutral heat flux dominated nature of ITG turbulence and still applies when trapped and passing kinetic electron effects are included. Fueling using shallow pellet injection or supersonic gas jets is augmented by an inward pinch of could DT fuel. The natural fueling mechanism is demonstrated using the three-dimensional toroidal electromagnetic gyrokinetic turbulence code GEM and is analyzed using quasilinear theory. Profiles similar to those used for conservative ITER transport modeling that have a completely flat density profile are examined and it is found that natural fueling actually reduces the linear growth rates and energy transport.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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