论文标题

使用耦合加压气体Cherenkov检测器的野马动量测量

Fieldable Muon Momentum Measurement using Coupled Pressurized Gaseous Cherenkov Detectors

论文作者

Bae, Junghyun, Chatzidakis, Stylianos

论文摘要

宇宙射线muons呈现辐射背景的很大一部分,具体取决于兴趣的应用,可以看作是背景噪声,例如,辐射映射,辐射保护,剂量测定法或作为有用的询问探针,例如宇宙射线穆恩穆斯术。值得注意的是,有关灵恩散射断层扫描的最新发展,该发展已成为许多应用程序的潜在非侵入性监测方法,包括花费的核燃料桶监测和地理位置图。但是,尽管有明显的好处,但在没有诉诸于大型且昂贵的热量计,环形成像器或飞行探测器的时间的情况下,测量现场的万能动量仍然非常具有挑战性。 CNL和INFN的最新努力基于多种库仑散射以及MUON动量重建算法开发了大型原型。尽管这些努力表现出希望,但没有可携带的探测器可以测量该领域的兆势。在这项工作中,我们提出了一个新的概念,用于使用耦合的气态Cherenkov辐射器来测量万能动量。通过仔细选择每个散热器的气压,我们可以优化将检测到MUON信号的MUON动量阈值。这样,通过辐射器的振荡只会以动量阈值小于实际的muon动量触发那些辐射器。通过测量每个散热器中Cherenkov信号的存在,我们的系统可以估计MUON动量。这种概念的主要好处是它可以紧凑和便携,以便可以分别部署在现场,也可以与现有的断层扫描系统结合使用。

Cosmic ray muons present a large part of the radiation background and depending on the application of interest muons can be seen as background noise, e.g., radiation mapping, radiation protection, dosimetry, or as a useful interrogation probe such as cosmic ray muon tomography. It is worth noting recent developments on muon scattering tomography which has emerged as a prospective noninvasive monitoring method for many applications including spent nuclear fuel cask monitoring and geotomography. However, it is still very challenging to measure muon momentum in the field, despite the apparent benefits, without resorting to large and expensive calorimeters, ring imagers, or time of flight detectors. Recent efforts at CNL and INFN have developed large prototypes based on multiple Coulomb scattering coupled with the muon momentum reconstruction algorithms. While these efforts show promise, no portable detectors exist that can measure muon momentum in the field. In this work, we present a new concept for measuring muon momentum using coupled pressurized gaseous Cherenkov radiators. By carefully selecting the gas pressure at each radiator we can optimize the muon momentum threshold for which a muon signal will be detected. This way, a muon passing through the radiators will only trigger those radiators with momentum threshold less than the actual muon momentum. By measuring the presence of Cherenkov signals in each radiator, our system can then estimate the muon momentum. The primary benefit of such a concept is that it can be compact and portable enough so that it can be deployed in the field separately or in combination with existing tomography systems.

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