Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 600, Issue 1, Pages 68-70Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2008.11.062
Keywords
Neutron supermirror; Ion beam sputtering
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [19760618]
- Grants-in-Aid for Scientific Research [19760618] Funding Source: KAKEN
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Neutron supermirrors have increasingly become important devices for transporting, bending, and focusing neutron beams. To produce these optical devices for the new spallation neutron source (Japan Proton Accelerator Research Complex, J-PARC), an ion beam sputtering (IBS) system with an effective deposition area of 0.2 m(2) has been installed at the Japan Atomic Energy Agency. We have succeeded in fabricating high-reflectivity supermirrors by adopting NiC/Ti multilayers instead of conventional Ni/Ti multilayers. The neutron reflectivity of the NiC/Ti supermirrors is 0.88 and 0.82 at critical angles 3 and 4 times larger, respectively, than that of nickel. We have also demonstrated that a NiC/Ti supermirror with a reflectivity of 0.40 at a critical angle 6 times larger than that of nickel can be fabricated. (C) 2008 Elsevier B.V. All rights reserved.
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