论文标题
开发用于加多林的水的离子交换树脂
Development of an ion exchange resin for gadolinium-loaded water
论文作者
论文摘要
数十年来，大量水切伦科夫探测器已成功地用于高能和低能粒子物理。然而，对于此类探测器而言，检测中子仍然是一个挑战，因为在氢原子上的中子捕获没有释放足够数量的伽马能以有效地观察到。已广泛探索了以可溶性盐的形式使用Gadolinium，以解决此问题，因为Gadolinium表现出非常大的中子捕获横截面和随后的高能量伽玛级联反应。但是，为了使大量加载的探测器在长时间内稳定运行，必须通过原位纯化来维持水光学透明度。已经开发了涉及带通分子滤波的新方法。尽管这些方法非常成功，但它们很昂贵，并且在消除其他杂质的同时，他们试图最大程度地减少gadolinium的损失，因此它们具有相当大的力量和空间。对于可以容忍某些gadolin损失的较小探测器，这是一种非常昂贵的方法。在本文中，我们描述了用于净化26吨安妮中微子探测器中加多林载体水的系统的设计，开发和测试。
Large water Cherenkov detectors have been successfully used for decades in high- and low-energy particle physics. Nevertheless, detecting neutrons remains a challenge for such detectors since a neutron capture on a hydrogen atom doesn't release a sufficient amount of gamma energy to be observed efficiently. The use of gadolinium in the form of soluble salts has been explored extensively to remedy this issue, as gadolinium exhibits both a very large neutron capture cross section and a subsequent high-energy gamma cascade. However, in order for large gadolinium-loaded detectors to operate stably over long time periods, water optical transparency must be maintained by in situ purification. New methods have been developed involving band-pass molecular filtering. While these methods are very successful, they are expensive and consume considerable power and space as they seek to minimize loss of gadolinium while removing other impurities. For smaller detectors where some gadolinium loss can be tolerated, a less expensive way to do this is very desirable. In this paper, we describe the design, development and testing of a system used to purify the gadolinium-loaded water in the 26-ton ANNIE neutrino detector.
