Vanadium-based neutron beam monitor

Vanadium-based neutron beam monitor
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钒基中子束监测仪

DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
R. Hall
R. Hall
中科院分区：
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文献类型：
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作者：
V. Maulerová;K. Kanaki;P. Kadletz;R. Woracek;T. Wilpert;K. Fissum;A. Laloni;N. Mauritzson;F. Issa;R. Hall

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基于薄天然钒箔和标准 $^3$He 正比计数器的各向同性中子散射的原型侵入式（准寄生）热中子束监测器已经概念化、设计、模拟、校准和调试。由于束流监测器是侵入式的，因此非常低的中子束衰减是一个必要的特性。此外，非常需要在尽可能宽的速率范围内实现响应线性。该原型首先在瑞典隆德核物理部的源测试设施中使用放射性中子源进行校准。随后，原型机在德国柏林亥姆霍兹中心的 V17 和 V20 束线进行了中子束调试。低衰减和响应线性都已成功证明，表明该概念是可行的并且值得继续开发。在本论文中，对原型的开发进行了专题概述。 （较少的）
A prototype invasive (quasi-parasitic) thermal-neutron beam monitor based on isotropic neutron scattering from a thin natural Vanadium foil and standard $^3$He proportional counters has been conceptualized, designed, simulated, calibrated, and commissioned. As the beam monitor is invasive, very low neutron-beam attenuation is a necessary characteristic. Further, response linearity over as wide a range of rates as possible is highly desirable. The prototype was first calibrated using radioactive neutron sources at the Source-Testing Facility at the Division of Nuclear Physics in Lund, Sweden. Subsequently, the prototype was commissioned with beams of neutrons at the V17 and V20 beamlines of the Helmholtz Zentrum in Berlin, Germany. Both low attenuation and response linearity have been successfully demonstrated, indicating the concept is viable and worth continued development efforts. In this thesis, a monographic overview of the development of the prototype is presented. (Less)