High Performance Supermirrors on Metallic Substrates

Schanzer, Christian; Böni, P.; Schneider, Michael L.

doi:10.1088/1742-6596/251/1/012082

Cited by 15 publications

(9 citation statements)

References 4 publications

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“…This technique enables us to fabricate supermirrors on curved surfaces for ellipsoidal focusing mirrors. Recently, forming and polishing techniques for curved substrates have been dramatically improved [24][25][26]; however, it is still very difficult to develop a large-m and small dspacing multilayer mirror because it takes a long time to fabricate and the coatings can easily peel off from the substrate due to the increase of internal stress of the multilayer. The stress increases with total thickness, and sometimes destroys the surface of the glass substrate.…”

Section: Large Flexible Self-standing Multilayer Sheetmentioning

confidence: 99%

The ion beam sputtering facility at KURRI: Coatings for advanced neutron optical devices

Hino

Oda

Kitaguchi

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tWe describe a film coating facility for the development of multilayer mirrors for use in neutron optical devices that handle slow neutron beams. Recently, we succeeded in fabricating a large neutron supermirror with high reflectivity using an ion beam sputtering system (KUR-IBS), as well as all neutron supermirrors in two neutron guide tubes at BL06 at J-PARC/MLF. We also realized a large flexible selfstanding m¼5 NiC/Ti supermirror and very small d-spacing (d ¼1.65 nm) multilayer sheets. In this paper, we present an overview of the performance and utility of non-magnetic neutron multilayer mirrors fabricated with the KUR-IBS

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Section: Large Flexible Self-standing Multilayer Sheetmentioning

confidence: 99%

The ion beam sputtering facility at KURRI: Coatings for advanced neutron optical devices

Hino

Oda

Kitaguchi

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…However, glass is sensitive to harsh environment of irradiation, temperature gradient, and mechanical stress, all of which are especially strong close to neutron moderators. Therefore, glass-based guides are placed not closer than about 1.5 m from moderators [4], [5]. Nickel guides could be placed closer to the moderator increasing the throughput of the guides.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and testing of high-performance all-metal neutron guides and axisymmetric mirrors by electrochemical replication

et al. 2020

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ABSTRACTNeutron scattering is one of the most useful methods of studying the structure of matter, with applications to biomedical, structural, magnetic and energy-related materials. Neutron-scattering instruments are installed around research reactors or accelerator-based neutron sources, and neutron guides are critical components of these facilities. They are neutron-transport optical devices consisting of state-of-the-art mirrors often tens of meters long. Here we demonstrate a novel fabrication method of all-metallic neutron guides and axisymmetric mirrors by electroplating from precision mandrels. The process allows for the fabrication of single-piece all-metal guides of prismatic and axisymmetric shapes. We also demonstrate supermirror guides and axisymmetric focusing supermirrors produced with the same technology. We present the fabrication and tests of the multilayer-coated replicated guides and optic and show that the mandrel is reproduced with high fidelity and reliability. Such supermirror optics will provide game-changing improvements in neutron techniques.

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“…Metallic substrates are robust and ductile, able to withstand high radiation irradiation and high-temperature. It is therefore able to install them even at a place close to the neutron source, which enables focusing from the upper stream of the beam line to utilize the emitted neutrons more efficiently [7]. A metal substrate made with electroless nickel-phosphorus (NiP) plating is a good candidate for producing optical devices because of its amorphous structure, good machinability and hardness, and capability of being applicable to mostly any type of substrate material [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

A Focusing Test of a Multiple Segmented Ellipsoidal Neutron-Focusing Mirror for a Compact-Focusing SANS Instrument

Takeda

Hosobata

Yamagata

et al. 2018

Proceedings of the International Conference on Neutron Optics (NOP2017)

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A 300 mm long metallic neutron focusing mirror with an ellipsoidal figure was designed and manufactured for a compact focusing small angle neutron scattering (SANS) instrument. The ellipsoidal figure was designed to have focal length of 2.5 m. The mirror consists of three mirror segments each plated with electroless NiP fixed to a base plate. The curved surface of the mirror segments were finished by a combination of ultrahigh precision cutting and mechanical polishing techniques to realize both an extremely smooth surface and fine figure accuracy. The neutron focusing performance was evaluated using the BL06 beam line at J-PARC/MLF and compared with a non-segmented mirror. It was confirmed that the multiple segment design doesn't affect the focusing performance for of a millimeter sized focused beam. The manufacture method is promising to fabricate an ellipsoidal mirror with high enough performance for a compact focusing SANS instrument.

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High Performance Supermirrors on Metallic Substrates

Cited by 15 publications

References 4 publications

The ion beam sputtering facility at KURRI: Coatings for advanced neutron optical devices

The ion beam sputtering facility at KURRI: Coatings for advanced neutron optical devices

Fabrication and testing of high-performance all-metal neutron guides and axisymmetric mirrors by electrochemical replication

A Focusing Test of a Multiple Segmented Ellipsoidal Neutron-Focusing Mirror for a Compact-Focusing SANS Instrument

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