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首页> 外文会议>Advancements in Nuclear Instrumentation Measurement Methods and Their Applications (conference) >E-SiCure Collaboration Project: Silicon Carbide Material Studies and Detector Prototype Testing at the JSI TRIGA Reactor
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E-SiCure Collaboration Project: Silicon Carbide Material Studies and Detector Prototype Testing at the JSI TRIGA Reactor

机译：E-Sicure Collaboration项目：JSI Triga反应堆的碳化硅材料研究和探测器原型测试

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In 2016, the "E-SiCure" project (standing for Engineering Silicon Carbide for Border and Port Security), funded by the NATO Science for Peace and Security Programme, was launched. The main objective is to combine theoretical, experimental and applied research towards the development of radiation-hard SiC-based detectors of special nuclear materials (SNM), and by that way, to enhance border and port security barriers. Along the plan, material modification processes are employed firstly to study, and secondly to manipulate the most severe electrically active defects (which trap or annihilate free charge carriers), by specific ion implantation and defect engineering. This paper gives an overview of the experimental activities performed at the JSI TRIGA reactor in the framework of the E-SiCure project. Initial activities were aimed at obtaining information on the radiation hardness of SiC and at the study of the energy levels of the defects induced by neutron irradiation. Several Schottky barrier diodes were fabricated out of nitrogen-doped epitaxial grown 4H-SiC, and irradiated under Cd filters in the PT irradiation channel in the JSI TRIGA reactor with varying neutron fluence levels. Neutron-induced defects in the material were studied using temperature dependent current-voltage (I-V), capacitance-voltage (C-V) and Deep-Level Transient Spectroscopy (DLTS) measurements. Our prototype neutron detectors are configured as 4H-SiC-based Schottky barrier diodes for detection of secondary charged particles (tritons, alphas and lithium atoms) which are result of thermal neutron conversion process in ~(10)B and ~6LiF layers above the surface of the 4H-SiC diodes. For field testing of neutron detectors using a broad beam of reactor neutrons we designed a standalone prototype detection system consisting of a preamplifier, shaping amplifier and a multichannel analyser operated by a laptop computer. The reverse bias for the detector diode and the power to electronic system are provided by a standalone battery-powered voltage source. The detector functionality was established through measurements using an ~(241)Am alpha particle source. Two dedicated experimental campaigns were performed at the JSI TRIGA reactor. The registered pulse height spectra from the detectors, using both ~(10)B and ~6LiF neutron converting layers, clearly demonstrated the neutron detection abilities of the SiC detector prototypes.
机译：2016年，由北约科学为和平和安全计划提供资助的“E-Sicure”项目（用于边境和港口安全的工程碳化物），是推出的。主要目的是将理论，实验和应用研究结合了发展特殊核材料（SNM）的辐射硬SIC探测器，并通过这种方式，以提高边境和港口安全障碍。沿着该计划，首先采用材料改性工艺进行研究，其次是通过特定的离子注入和缺陷工程操纵最严重的电活性缺陷（捕获或覆盖自由电荷载体）。本文概述了在E-Sicure项目框架中在JSI Triga反应堆中执行的实验活动。初始活动旨在获得关于SIC辐射硬度的信息，并在中子辐射诱导的缺陷的能量水平的研究中。在JSI Triga反应器中的PT辐射通道中的CD滤波器中辐照，在JSI Triga反应器中的CD滤波器中照射了几个肖特基势垒二极管。使用温度相关的电流 - 电压（I-V），电容 - 电压（C-V）和深级瞬态光谱（DLT）测量来研究材料中的中子引起的缺陷。我们的原型中子探测器配置为基于4H-SiC的肖特基势垒二极管，用于检测次级带电粒子（Tritons，α和锂原子），其在表面上方的〜（10）B和〜6LIF层中的热中子转化过程的结果4H-SIC二极管。对于使用宽射线反应器中子的中子探测器的现场测试，我们设计了由膝上型计算机操作的前置放大器，成形放大器和多通道分析仪组成的独立原型检测系统。检测器二极管的反向偏压和电子系统的电力由独立电池供电的电压源提供。通过使用〜（241）AMα粒子源的测量来建立检测器功能。在JSI Triga反应堆中进行了两个专用的实验活动。使用〜（10）B和〜6LIF中子转换层的探测器的注册脉冲高度光谱清楚地证明了SiC检测器原型的中子检测能力。

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