AISTANS小型电子加速器驱动中子装置的中子性能及未来展望

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-01-02 DOI:10.3233/jnr-220022

K. Kino, T. Fujiwara, M. Furusaka, T. Muroga, B. O’Rourke, N. Oshima, Y. Tomota

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引用次数: 0

摘要

在AISTANS研究了中子波长分辨率、布拉格边缘测量能力以及中子计数率的未来前景。使用铁粉样品通过Bragg边缘分析评估的波长分辨率与0.2–0.3 nm中子波长下的计算结果相当一致。还对具有不同BCC和FCC结晶度区域的钢板样品进行了布拉格边缘成像，并成功地区分了不同的晶体结构。此外，还测量了包含搅拌摩擦点焊区域的铝样品，并观察到两个接合区域处的200和111布拉格边缘。然而，很难描述这两个区域之间的纹理差异。由于计划提高电子束功率和中子探测器的探测效率，布拉格边缘成像的中子计数率预计在不久的将来将增加约50倍。

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Neutron performance and future prospect of the compact electron accelerator-driven neutron facility AISTANS

The neutron wavelength resolution, Bragg-edge measurement ability and future prospects regarding the neutron count rate were investigated at AISTANS. The wavelength resolution evaluated by Bragg-edge analysis using an iron powder sample is in reasonably good agreement with calculations at neutron wavelengths of 0.2–0.3 nm. Bragg-edge imaging was also performed on a steel plate sample with distinct regions of BCC and FCC crystallinity, and the different crystal structures were successfully discriminated. In addition, an aluminum sample containing a friction stir spot welding region was also measured and the 200 and 111 Bragg-edges at the two joining areas were observed. However, it was hard to characterize the difference in texture between the two areas. The neutron counting rate for Bragg-edge imaging is expected to increase by approximately a factor 50 in the near future thanks to the planned improvements of the electron beam power and the detection efficiency of the neutron detector.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.