Commissioning measurements for a very cold neutron interferometer based on nanodiamond-polymer composite gratings
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866914463985172480 |
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| author | Ackermann, Roxana H. Falmbigl, Sonja Hadden, Elhoucine Leprou, Alexia Dubois Filter-Pieler, Hanno Jenke, Tobias Klepp, Jürgen Pruner, Christian Tomita, Yasuo Fally, Martin |
| author_facet | Ackermann, Roxana H. Falmbigl, Sonja Hadden, Elhoucine Leprou, Alexia Dubois Filter-Pieler, Hanno Jenke, Tobias Klepp, Jürgen Pruner, Christian Tomita, Yasuo Fally, Martin |
| contents | Over the past decade, holographic nanodiamond-polymer composite gratings have been developed and optimized as high-efficiency diffractive elements for very cold neutrons (VCN), for use as mirrors and beam splitters in a triple-Laue (LLL) interferometer. We report their optical characterization and, crucially, their neutron-optical performance, including diffraction efficiency and angular selectivity under VCN conditions. We further demonstrate their integration into a VCN interferometer. The layout of the interferometer and its first implementation at the beamline are described, highlighting practical considerations for long-term operation. We discuss avenues for performance improvement, in particular grating fabrication refinements. These results establish nanodiamond-polymer composite gratings as viable components for VCN interferometry and pave a way toward precision neutron phase measurements in the very cold regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_09312 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Commissioning measurements for a very cold neutron interferometer based on nanodiamond-polymer composite gratings Ackermann, Roxana H. Falmbigl, Sonja Hadden, Elhoucine Leprou, Alexia Dubois Filter-Pieler, Hanno Jenke, Tobias Klepp, Jürgen Pruner, Christian Tomita, Yasuo Fally, Martin Optics Over the past decade, holographic nanodiamond-polymer composite gratings have been developed and optimized as high-efficiency diffractive elements for very cold neutrons (VCN), for use as mirrors and beam splitters in a triple-Laue (LLL) interferometer. We report their optical characterization and, crucially, their neutron-optical performance, including diffraction efficiency and angular selectivity under VCN conditions. We further demonstrate their integration into a VCN interferometer. The layout of the interferometer and its first implementation at the beamline are described, highlighting practical considerations for long-term operation. We discuss avenues for performance improvement, in particular grating fabrication refinements. These results establish nanodiamond-polymer composite gratings as viable components for VCN interferometry and pave a way toward precision neutron phase measurements in the very cold regime. |
| title | Commissioning measurements for a very cold neutron interferometer based on nanodiamond-polymer composite gratings |
| topic | Optics |
| url | https://arxiv.org/abs/2604.09312 |