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arXiv physics/0607127physics.plasm-phastro-ph
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高温等离子体中核反应速率的增强

On the enhancement of nuclear reaction rates in high-temperature plasma

Makoto Nakamura, Victor T. Voronchev, Yasuyuki Nakao

摘要:

我们认为,麦克斯韦近似可以从根本上低估了在热等离子体的条件下非常接近热平衡的一些核反应的速率。以X = Li、Be、C等轻元素的混合物在自持DT聚变等离子体中的反应为例,明确地证明了这一现象。一个动力学分析表明,反应性增强的结果从非麦克斯韦撞击扰动的离子分布所造成的密切碰撞与高能聚变产物。结果表明,尽管撞击离子的分数很小,但这些粒子对D+X和T+X反应速率有明显的影响。所讨论的现象可能具有普遍性,并可能在其他实验室和天体物理等离子体过程中发挥作用。

英文摘要:

We argue that the Maxwellian approximation can essentially underestimate the rates of some nuclear reactions in hot plasma under conditions very close to thermal equilibrium. This phenomenon is demonstrated explicitly on the example of reactions in self-sustained DT fusion plasma with admixture of light elements X = Li, Be, C. A kinetic analysis shows that the reactivity enhancement results from non-Maxwellian knock-on perturbations of ion distributions caused by close collisions with energetic fusion products. It is found that although the fraction of the knock-on ions is small, these particles appreciably affect the D+X and T+X reaction rates. The phenomenon discussed is likely to have general nature and can play role in other laboratory and probably astrophysical plasma processes.

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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