ENVISAGE: Evaluation and validation of the SIGMA gamma-ray tracking detector in relevant environments

设想试图评估和验证一种用于定位伽马辐射源的新型辐射检测系统的性能，从技术准备级别4发展到5。分段倒置同轴锗(Sigma)探测器是一种伽马射线跟踪和成像设备，旨在提供其他大容量锗探测器无与伦比的性能。这是通过将数字信号处理与独特的探测器设计相结合来实现的。准确测量探测器内伽马射线相互作用的位置和能量是解锁其最先进性能的关键。长期愿景是在两个环境中操作Sigma技术。第一个是在国际加速器实验室部署流动西格玛探测器阵列，以解决核结构和核天体物理学方面的问题，包括STFC科学挑战：(A6)核反应如何为天体物理过程提供动力并产生化学元素；(C6)核物质的性质是什么？一个关键的例子是在国际加速器设施中对极端奇异核的研究，其中Sigma将通过伽马射线跟踪识别复杂和高辐射背景下的低产额事件，从而促进超灵敏衰变光谱实验。第二个环境是在核退役中部署Sigma作为能谱伽马成像仪，以定位、识别和量化伽马辐射。该项目有4个目标：1.评估衰变能谱实验的性能。2.评价伽马射线成像在核退役中的性能。提高探测器制造成品率。建立潜在终端用户网络。对于目标1，JysväskyläAccelerator实验室(JYFL)已被同意作为试验场，因为他们对采用Sigma技术有浓厚的兴趣。JYFL拥有世界上最通用和最有效的奇异核衰变光谱系统之一[NUPECC长程计划2017]。目标2支持在工业相关伽马成像场景中部署Sigma技术，这将产生社会和经济影响。目标3和目标4将通过技术开发和用户参与为更广泛的市场采用奠定基础。

ENVISAGE seeks to evaluate and validate the performance of a novel radiation detection system for locating sources of gamma-radiation, progressing from Technology Readiness Level 4 to 5. The Segmented Inverted Coaxial Germanium (SIGMA) detector is a gamma-ray tracking and imaging device designed to offer unrivalled performance over other large volume germanium detectors. This is achieved by combining digital signal processing with a unique detector design. An accurate measurement of gamma-ray interaction position and energy within the detector is key to unlocking its state-of-the-art performance.The long-term vision is to operationalise the SIGMA technology in two environments. The first is deployment of a mobile SIGMA detector array at international accelerator laboratories to address questions in nuclear structure and nuclear astrophysics, including STFC Science challenges: (A6) How do nuclear reactions power astrophysical processes and create the chemical elements and (C6) what is the nature of nuclear matter? A key example is the study of extremely exotic nuclei at international accelerator facilities, in which SIGMA will facilitate ultra-sensitive decay spectroscopy experiments by identifying low-yield events within complex and high radiation backgrounds through gamma-ray tracking. The second environment is deployment of SIGMA as a spectroscopic gamma-ray imager in nuclear decommissioning to locate, identify and quantify gamma radiation.The project has 4 objectives:1. Evaluate performance for decay spectroscopy experiments. 2. Evaluate performance for gamma-ray imaging in nuclear decommissioning.3. Enhance detector manufacturing yield.4. Develop a network of potential end users.For objective 1, the Jysväskylä Accelerator Laboratory (JYFL) has been agreed as a test site due to their strong interest in adopting SIGMA technology. JYFL has one of the most versatile and efficient systems for decay spectroscopy of exotic nuclei in the world [NUPECC Long Range Plan 2017]. Objective 2 underpins deployment of SIGMA technology at industrially relevant gamma-ray imaging scenarios, which will have societal and economic impact. Objective 3 and 4 will underpin wider market adoption through technology development and user engagement.