Advanced neutron and gamma-ray detection

先进的中子和伽马射线探测

• 批准号: RGPIN-2016-04516
• 负责人: Byun, SooHyun
• 金额: $ 2.91万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=646643
• 关键词: Advanced; neutron; gamma; ray; detection

There has been great progress in neutron and gamma-ray radiation detection in the last decades. In neutron detection, many efforts geared for detecting weak neutron fields have been attempted to address the current issues in neutron detection. In gamma-ray detection, new gamma-ray detectors were developed, which offer excellent energy resolution over the traditional gamma-ray detectors. In spite of this progress and new attempts, there are still fundamental limitations in neutron and gamma-ray detection, particularly for weak neutron and intense gamma-ray fields. ***In this Discovery research, in order to address these limitations, my research group aims to develop advanced radiation detectors and signal processing systems. Currently, the most critical issue in neutron detection is to find a detection technique alternative to the 3He gaseous neutron counter, the most popular detector type when a high efficiency is desired. However, the 3He supply is currently in great shortage while 3He demand keeps increasing rapidly, which has led to an unsustainable situation. Inspired by our THick Gas Electron Multiplier (THGEM) detector technology, my group aims to design and build a new neutron detector to replace 3He counters.***Another main objective of the proposed research is to develop a new signal processing system for high count rate gamma-ray spectrometry. In high counting rates, the average time interval between detected events is very short and multiple pulses can overlap each other, which leads to distortion in pulse height. To date, these pile-up pulses have had to be discarded although they are valid detection events. In principle, the best solution for this problem is to deconvolute the pile-up pulses in real time, but no successful methods have yet been developed for the most famous type of the gamma-ray detector, although there have been a few attempts. My group aims to develop a fast and efficient signal processing system to address this challenge. ***A major outcome of this Discovery research is a new neutron detector alternative to 3He counters. The detector is expected to be a promising candidate for replacing 3He counters for all areas from the fundamental physics to nuclear industries and the border screening. Another major outcome of this research is a pulse pile-up deconvolution system, which will revolutionize the current radiation signal processing capability for the Canadian nuclear physics community and Canadian nuclear industries. **

在过去的几十年里，中子和伽马射线辐射探测取得了很大的进展。在中子探测中，为了探测弱中子场，人们已经尝试了许多努力来解决当前中子探测中的问题。在伽马射线探测方面，新的伽马射线探测器被开发出来，它比传统的伽马射线探测器具有更好的能量分辨率。尽管取得了这一进展和新的尝试，但中子和伽马射线探测仍然存在根本限制，特别是对于弱中子场和强伽马射线场。*在这次发现号研究中，为了解决这些限制，我的研究小组的目标是开发先进的辐射探测器和信号处理系统。目前，中子探测中最关键的问题是寻找一种替代3He气体中子计数器的探测技术，当需要高效率时，3He气体中子计数器是最受欢迎的探测器类型。然而，目前3He供应严重短缺，而3He需求持续快速增长，导致了不可持续的局面。受我们的厚气电子倍增器(THGEM)探测器技术的启发，我的团队旨在设计和制造一种新的中子探测器来取代3He计数器。*拟议研究的另一个主要目标是开发一种用于高计数率伽马射线能谱的新的信号处理系统。在高计数速率下，检测到的事件之间的平均时间间隔非常短，并且多个脉冲可能彼此重叠，这导致脉冲高度失真。迄今为止，这些堆积脉冲不得不被丢弃，尽管它们是有效的检测事件。原则上，这个问题的最佳解决方案是实时解卷积脉冲，但对于最著名的伽马射线探测器，还没有成功的方法，尽管已经有一些尝试。我的团队的目标是开发一种快速高效的信号处理系统来应对这一挑战。*这项发现号研究的一个主要成果是一种新的中子探测器，可以替代3He计数器。该探测器有望在从基础物理到核工业和边境筛查的所有领域取代3He计数器。这项研究的另一项重大成果是脉冲堆积反卷积系统，它将彻底改变加拿大核物理界和加拿大核工业目前的辐射信号处理能力。**