京都大学反应堆Talbot-Lau干扰仪的中子相成像
Yoshichika Seki1, Takenao Shinohara2, Masahiro Hino3
1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan.
The Review of scientific instruments
|October 4, 2023
概括
为中型反应堆开发了一种新的中子相成像系统,可使用差相和可见性成像进行Inconel 718等材料的详细缺陷分析.
科学领域:
- 中子光学中的中子光学.
- 材料科学是一种材料科学.
- 干涉测量是干涉测量的方法.
背景情况:
- 中子相成像为非破坏性材料分析提供了独特的能力.
- 塔尔博特-劳干扰仪对于先进的中子成像技术至关重要.
- 中型中子源需要优化的成像系统来实现实际应用.
研究的目的:
- 在京都大学反应堆的CN-3端口开发和实施一种新的中子相成像系统.
- 为了使用热中子实现高效的分相和可见性 (暗场) 成像.
- 证明系统在增材制造材料中分析缺陷的能力.
主要方法:
- 使用Talbot-Lau干扰仪,设计波长较短 (2.7 Å),用于增强成像.
- 使用厚型加多制造的中子吸收格子,用于高可见性摩埃尔边缘 (55%可见性).
- 对Inconel 718棒进行了相差和可见性成像,随后进行了断层扫描.
主要成果:
- 使用开发的格子系统实现了清晰的moiré边缘,可见度高.
- 在热静态压缩后成功可视化了Inconel 718杆的缺陷大小变化.
- 通过中子断层扫描揭示了缺陷的亚微米尺度空间分布.
结论:
- 新的中子相成像系统有效分析增材制造材料的缺陷.
- 该系统的设计适用于中型中子源的利用.
- 高可见度格子和先进的成像技术使材料的详细表征成为可能.
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