次临界nuclear reactors的超大中子放大
Arbitrarily large neutron amplification in subcritical nuclear reactors
摘要：
在次临界反应堆中，每个中子每代仅产生keff < 1个中子（渐近地和平均地），因此在没有外部源的情况下，中子总数呈指数下降。因此，链式反应容易停止，使得这种反应器固有地稳定。有趣的是，与常识相反，keff，外部源强度和反应堆的输出功率之间没有关系。在本文中，我提出了各种可能的策略来利用这一事实，并将它们应用于设计一个基本的多层系统，该系统允许每个源中子达到任意大的裂变次数，同时保持keff < 1固定（我使用keff=0.97）。放大器的行为进行了验证，简单的蒙特卡罗输运模拟。该提案无可否认地带来了需要进一步研究的复杂性和微妙性，但是，如果得到发展，可以允许驱动具有微弱中子源的次临界反应堆，例如基于放射性同位素的。
英文摘要：
In a subcritical reactor, each neutron produces only keff < 1 neutron per generation (asymptotically and on average), and thus the neutron population decreases exponentially in the absence of external source. The chain reaction is thus easy to stop, making such reactors inherently stable. Interestingly, and contrary to common wisdom, there is no relation between keff, the external source intensity, and the output power of the reactor. In this paper, I present various possible strategies to exploit this fact, and apply them to the design of a rudimentary multi-layer system that allows to reach an arbitrarily large number of fissions per source neutron, while keeping keff < 1 fixed (I used keff=0.97). The behavior of the amplifier is verified with simple Monte-Carlo transport simulations. The proposal admittedly brings complications and subtleties that need to be studied further, but, if developed, could allow to drive subcritical reactors with faint neutron sources, e.g. radioisotope based.
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。
