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Relation of the runaway avalanche threshold to momentum space topology

机译:对势头空间拓扑的失控雪崩阈值的关系

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The underlying physics responsible for the formation of an avalanche instability due to the generation of secondary electrons is studied. A careful examination of the momentum space topology of the runaway electron population is carried out with an eye toward identifying how qualitative changes in the momentum space of the runaway electrons is correlated with the avalanche threshold. It is found that the avalanche threshold is tied to the merger of an O and X point in the momentum space of the primary runaway electron population. Such a change of the momentum space topology is shown to be accurately described by a simple analytic model, thus providing a powerful means of determining the avalanche threshold for a range of model assumptions.
机译:研究了负责形成由于二次电子产生的雪崩不稳定性的潜在物理。 仔细检查对失控电子群的动量空间拓扑的仔细检查,以旨在识别失控电子的动量变化与雪崩阈值相关的质量变化。 发现雪崩阈值与初级失控电子群的动量空间中的O和X点的合并相关联。 示出了通过简单的分析模型准确地描述了这种动量空间拓扑的改变,从而提供了一种强大的方法,可以确定确定一系列模型假设的雪崩阈值。

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