T. Oyama, H. Iwase, A. Toyoda, Naoto Yoshihara, T. Sanami
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引用次数: 0
摘要
利用金箔活化技术测量了KEK电子/正电子注入直线加速器(KEK-linac)隧道中正电子产生束操作形成的热中子通量分布。实测数据与PHITS规范的计算结果进行了比较。数据表明，热中子局部分布在目标位置15 ~ 20 m范围内。利用PHITS代码获得的热中子通量再现了目标位置的实验数据。根据实验结果和计算得出kek -直线隧道的系数C为2.25，φth = C Q / S，其中Q为中子源强度，S为隧道表面面积。
Thermal neutron distribution in the beam line tunnel of the KEK electron/positron injector linac
The thermal neutron flux distribution formed in the KEK electron/positron injector linac (KEK-linac) tunnel by the positron production beam operation was measured using a gold foil activation technique. The measured data were compared with the calculation results of the PHITS code. The data indicate that the thermal neutrons were locally distributed within a range of 15-20 m of the target position. The thermal neutron flux obtained using the PHITS code reproduced the experimental data at the target location. We obtained coefficient “C” for KEK-linac tunnel from experimental result and calculation as 2.25 that is used in empirical formula to obtain thermal neutron flux, φth = C Q / S, where Q is neutron source intensity, S is the area of tunnel surface.
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