Preliminary Investigation on Design and Fabrication of a Metallic-Ellipsoidal Neutron Focusing Mirror

Jiang Guo; Yutaka Yamagata; Shin Takeda; Junichi Kato; Masahiro Hino; Michihiro Furusaka; Shinya MORITA

doi:10.4028/www.scientific.net/KEM.625.230

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Preliminary Investigation on Design and Fabrication of a Metallic-Ellipsoidal Neutron Focusing Mirror
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 625Preliminary Investigation on Design and...

Preliminary Investigation on Design and Fabrication of a Metallic-Ellipsoidal Neutron Focusing Mirror

Abstract:

Neutron beam is a very useful probe for material characterization and non-destructive testing. There are a number of plans to construct neutron instrumens using focusing mirror to improve beam quality with higher intensity and smaller spot size. In this paper, an ellipsoidal mirror made by a metal substrate is proposed. As the metal substrate, electroless nickel is adopted because of its amorphous structure, machinability and relatively large critical angle of neutron reflection. The design of ellipsoidal neutron focusing mirror is made by considering the neutron reflectivity. A mirror is fabricated by ultrahigh precision cutting and 1^st polishing process, and the form accuracy of 5 μm P-V with surface roughness of 0.7 nm Ra is obtained. Through this experimental fabrication, the feasibility of the proposed method is verified.

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Periodical:

Key Engineering Materials (Volume 625)

Pages:

230-233

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.625.230

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Online since:

August 2014

Authors:

Jiang Guo*, Yutaka Yamagata, Shin Takeda, Junichi Kato, Masahiro Hino, Michihiro Furusaka, Shinya MORITA

Keywords:

Ellipsoidal, Focusing, Manufacturing Process, Metal Substrate, Neutron Mirror

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