Studies on a pulsed thermal/epithermal neutron source with a compact accelerator for neutron imaging
Studies on a pulsed thermal/epithermal neutron source with a compact accelerator for neutron imaging
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用于中子成像的紧凑型加速器脉冲热/超热中子源的研究
DOI：
10.1016/j.phpro.2013.03.011
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Y. Kiyanagi
中科院分区：
文献类型：
--
作者：
H. Hasemi;T. Kamiyama;Y. Kiyanagi
基于紧凑型加速器的小型中子设施在可及性和可用性方面比大型设施具有一些优势。中子成像是紧凑型加速器中子源的主要目标之一。因此，我们进行了优化研究的脉冲热中子源和超热一个基于紧凑型加速器，以使用它的热中子成像和共振中子成像。我们已经进行了模拟计算，以评估中子强度的变化取决于慢化剂的大小，同时考虑到空间分辨率。在相同的L/D下，小慢化剂的辐射强度高于大慢化剂。然而，视场（FOV）限制了最小减速器尺寸。在长径比为100、视场为10 ~ 30 cm时，减速器的最佳尺寸为10 ~ 12 cm。
A small neutron facility based on a compact accelerator has some advantages over a large facility in terms of accessibility and usability. One of main objects of a compact accelerator neutron source is neutron imaging. Therefore, we performed an optimization study on a pulsed thermal neutron source and an epithermal one based on a compact accelerator in order to use it for thermal neutron imaging and resonance neutron imaging. We have carried out simulation calculations to evaluate the neutron intensity change depending on the moderator size taking into account spatial resolution. The intensities from a small moderator were higher than that from a larger one when compared at the same L/D. However, field of view (FOV) constrained the minimal moderator size. At L/D of 100 and FOV from 10 to 30cm, the optimal moderator size giving the highest intensity was from 10 to 12cm.