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Design and Fabrication of Ni/Ti Multilayer for Neutron Supermirror |
| ZHANG Zhong;WANG Zhan-Shan;ZHU Jing-Tao;WANG Feng-Li;WU Yong-Rong;QIN Shu-Ji;CHEN Ling-Yan |
| Institute of Precision Optical Engineering (IPOE), Department of Physics, Tongji University, Shanghai 200092 |
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| Cite this article: |
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ZHANG Zhong, WANG Zhan-Shan, ZHU Jing-Tao et al 2006 Chin. Phys. Lett. 23 2678-2680 |
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Abstract In the applications of neutron guides and focusing devices, by using the Ni/Ti multilayer supermirrors (SM), the neutron flux is significantly enhanced, because the critical reflective angle of supermirrors increases m times compared to the one of natural bulk Ni. We design and fabricate the Ni/Ti multilayer supermirrors by considering the effect of the interfacial imperfection, such as interface roughness and diffusion, and by using the direct current magnetron sputtering technology. The reflective performances of these supermirrors are measured on a V14 neutron beam line at the Berlin Neutron Scattering Centre (BENSC), Germany. The measurement data suggest that the critical angles of the supermirrors are 1.5 and 2.2 times that of bulk Ni, respectively.
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| Keywords:
07.60.Hv
07.85.Fv
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Published: 01 October 2006
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| PACS: |
07.60.Hv
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(Refractometers and reflectometers)
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07.85.Fv
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(X- and γ-ray sources, mirrors, gratings, and detectors)
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