3-D thermal and radiation-matter interaction simulations of a SiC solid-state detector for neutron flux measurements in JSI TRIGA Mark II research reactor
3-D thermal and radiation-matter interaction simulations of a SiC solid-state detector for neutron flux measurements in JSI TRIGA Mark II research reactor
复制标题
用于 JSI TRIGA Mark II 研究堆中子通量测量的 SiC 固态探测器的 3D 热和辐射-物质相互作用模拟
DOI：
10.1051/epjconf/202125304009
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发表时间：
2021
影响因子：
--
通讯作者：
C. Reynard
中科院分区：
文献类型：
--
作者：
V. Valero;L. Ottaviani;A. Lyoussi;H. Ghninou;V. Radulovic;L. Snoj;A. Pungerčič;A. Volte;M. Carette;C. Reynard
中子探测是核仪器领域的一个相关课题。它是聚变应用(中子诊断、试验包层模块TBM内的测量)以及裂变应用(堆内和堆外监测、中子测绘或研究反应堆中的安全应用)所关注的核心问题。此外，由于未来的实验堆如Jules Horowitz反应堆或国际热核实验堆的条件更加苛刻，中子探测器需要适应高中子和γ通量、高核加热率和高温。因此，需要在中子和γ混合环境中具有快速响应、高能量分辨率和稳定性的辐射和温度加固传感器。所有这些要求使得宽禁带半导体，更准确地说，碳化硅(SIC)，由于其在这种极端环境中的固有特性而成为重要的候选者。因此，在过去的几十年里，人们开发和研究了用于各种核设施中的中子探测的碳化硅基探测器。本文在斯洛文尼亚的JožEf Stefan研究所TRIGA Mark II研究堆上，通过热和辐射-物质相互作用的数值模拟，设计并研究了一个基于碳化硅的中子探测器。本文首先介绍了我们研制的碳化硅探测器的科学背景和存在的问题。在第二部分中，显示了3D几何图形。在此基础上，给出了三维数值模拟结果。最后给出了三维辐射/物质相互作用的数值模拟结果。
Neutron detection is a relevant topic in the field of nuclear instrumentation. It is at the heart of the concerns for fusion applications (neutron diagnostics, measurements inside the Test Blanket Modules TBM) as well as for fission applications (in-core and ex-core monitoring, neutron mapping or safety applications in research reactors). Moreover, due to the even more harsh conditions of the future experimental reactors such as the Jules Horowitz Reactor (JHR) or International Thermonuclear Experimental Reactor (ITER), neutron detectors need to be adapted to high neutron and γ fluxes, high nuclear heating rates and high temperatures. Consequently, radiation and temperature hardened sensors with fast response, high energy resolution and stability in a mixed neutron and γ environment are required. All these requirements make wide-bandgap semiconductors and, more precisely, Silicon Carbide (SiC) serious candidates due to their intrinsic characteristics in such extreme environments. Thus, since the last decades, SiC-based detectors are developed and studied for neutron detection in various nuclear facilities. In this paper, a SiC-based neutron detector is 3-D designed and studied through thermal and radiation-matter interaction numerical simulations for a future irradiation campaign at the Jožef Stefan Institute TRIGA Mark II research reactor in Slovenia. Firstly, this paper presents the scientific background and issues of our SiC-based detectors. In a second part the 3-D geometry is shown. Thereafter, the 3-D numerical thermal simulation results are reported. Finally, the 3-D numerical radiation/matter interaction simulations results are presented.