Improvement in the synthesis of Ni/Ti neutron mirrors

Alan F. Jankowski

doi:10.1117/12.130615

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23 November 1992 Improvement in the synthesis of Ni/Ti neutron mirrors

Alan F. Jankowski

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Proceedings Volume 1738, Neutron Optical Devices and Applications; (1992) https://doi.org/10.1117/12.130615
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Improvement in the as-deposited structure of Ni/Ti multilayers is achieved through optimization of the sputter deposition process. In the as-deposited condition, these Ni/Ti multilayers are well suited for very high reflectivity (> 95%) neutron supermirror application. Smooth layering is produced with compositionally abrupt interfaces yielding an effective roughness less than 1 nm. The deposition parameters are controlled to produce a near thermalized condition for the sputtered neutrals. The Ni/Ti multilayer system is not structurally stable, however, when subject to moderate heating (> 300 degree(s)C) or irradiation. The in-use degradation of interface structure from neutron irradiation may be limitation for the Ni/Ti system.

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Alan F. Jankowski "Improvement in the synthesis of Ni/Ti neutron mirrors", Proc. SPIE 1738, Neutron Optical Devices and Applications, (23 November 1992); https://doi.org/10.1117/12.130615

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