Abstract

Most modern magnetic confinement fusion devices feature deuterium plasma with the emission of 2.5 MeV neutrons. The neutron yield during the discharge gives information on plasma heating and confinement efficiency. Hence, the challenge of measuring a fast DD neutron flux becomes an increasingly important task for fusion research. This work studies the possibility of using a LaCl₃(Ce) scintillation crystal for this. The scintillation detector characteristics were studied using reference γ sources and a ING-07D fast-neutron generator with a neutron yield of up to 1 × 10⁷ n/s. The GEANT4 code was used for the numerical modeling of the detector response to neutron and γ irradiation. The results provide a promising outlook for the application of a LaCl₃(Ce) crystal for the purposes of fast DD neutron measurements.

中文翻译：

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LaCl 3（Ce）闪烁体在快速中子测量中的应用

摘要

大多数现代的磁约束聚变设备都具有氘等离子体，其发射2.5 MeV中子。放电过程中的中子产率提供了有关等离子体加热和约束效率的信息。因此，测量快速DD中子通量的挑战已成为聚变研究日益重要的任务。这项工作研究了为此使用LaCl ₃（Ce）闪烁晶体的可能性。使用参考γ源和ING-07D快中子发生器研究了闪烁探测器的特性，中子产额高达1×10 ⁷ n / s。GEANT4代码用于检测器对中子和γ辐射的响应的数值建模。结果为LaCl ₃的应用提供了广阔的前景（Ce）晶体用于快速DD中子测量。