Irradiation effects in beryllium exposed to high energy protons of the NuMI neutrino source
Irradiation effects in beryllium exposed to high energy protons of the NuMI neutrino source
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暴露于 NuMI 中微子源高能质子的铍的辐照效应
DOI：
10.1016/j.jnucmat.2017.04.011
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发表时间：
2017
影响因子：
3.1
通讯作者：
Kuksenko V
中科院分区：
文献类型：
--
作者：
Kuksenko V
在美国伊利诺斯州巴达维亚费米国家加速器实验室（Fermilab）的“主注入器中微子”（NuMI）束线的铍真空-空气初级束“窗”中，用120 GeV质子辐照了7年，窗中心的最大积分注量为2.06 × 1022 p/cm 2，对应的辐射损伤水平为0.48 dpa。质子束以0.5 Hz脉冲，导致每个脉冲瞬时温升40 °C。窗户通过自然对流冷却，估计平均工作温度在50 °C左右。利用SEM/EBSD和原子探针层析成像（AtomProbeTomography）对辐照后材料的微观结构进行了研究，并与束窗未辐照区和PF-60级原材料的微观结构进行了比较。杂质主要集中在沉淀物中，并在晶界和位错线处形成偏聚。还发现低含量的Fe、Cu、Ni、C和O均匀分布在铍基体中。在辐照材料中，高达440 appm的锂，来自铍的嬗变均匀分布在溶液中的铍矩阵。
A beryllium primary vacuum-to-air beam ‘window’ of the "Neutrinos at the Main Injector" (NuMI) beamline at Fermi National Accelerator Laboratory (Fermilab), Batavia, Illinois, USA, has been irradiated by 120 GeV protons over 7 years, with a maximum integrated fluence at the window centre of 2.06 1022p/cm2corresponding to a radiation damage level of 0.48 dpa. The proton beam is pulsed at 0.5 Hz leading to an instantaneous temperature rise of 40 °C per pulse. The window is cooled by natural convection and is estimated to operate at an average of around 50 °C. The microstructure of this irradiated material was investigated by SEM/EBSD and Atom Probe Tomography, and compared to that of unirradiated regions of the beam window and that of stock material of the same PF-60 grade.Microstructural investigations revealed a highly inhomogeneous distribution of impurity elements in both unirradiated and irradiated conditions. Impurities were mainly localised in precipitates, and as segregations at grain boundary and dislocation lines. Low levels of Fe, Cu, Ni, C and O were also found to be homogeneously distributed in the beryllium matrix. In the irradiated materials, up to 440 appm of Li, derived from transmutation of beryllium was homogeneously distributed in solution in the beryllium matrix.
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影响因子：
3.1
作者：
C. Forty;R. Forrest;G. Butterworth
通讯作者：
G. Butterworth
Be-Al-Fe 中的相平衡和扩散
DOI：
10.1007/bf02644075
发表时间：
1976
期刊：
Metallurgical Transactions A
影响因子：
--
作者：
S. Myers;J. Smugeresky
通讯作者：
J. Smugeresky
铍中的中子损伤
影响因子：
3.1
作者：
D. Gelles;H. Heinisch
通讯作者：
H. Heinisch
影响因子：
3.1
作者：
L. Snead
通讯作者：
L. Snead
Be−Li（铍-锂）系统
DOI：
10.1007/bf02871175
发表时间：
1985
期刊：
Bulletin of Alloy Phase Diagrams
影响因子：
--
作者：
A. Pelton
通讯作者：
A. Pelton