High-Density Ultracold Neutron Source for Low-Energy Particle Physics Experiments Article Swipe

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Skyler Degenkolb , E. Chanel , Simon Baudoin , Marie-Hélène Baurand , D. Beck , Juliette Blé , E. Bourgeat-Lami , Zeus Castillo , Hanno Filter , M. van der Grinten , Tobias Jenke , M. Jentschel , Victorien Joyet , E. Lelièvre‐Berna , Husain Manasawala , Thomas Neulinger , P. Fierlinger , K. Svirina , Xavier Tonon , O. Zimmer ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2504.13030

SuperSUN, a new superthermal source of ultracold neutrons (UCN) at the Institut Laue-Langevin, exploits inelastic scattering of neutrons in isotopically pure superfluid $^4$He at temperatures below $0.6\,$K. For the first time, continuous operation with an intense broad-spectrum cold neutron beam is demonstrated over 60 days. We observe continuous UCN extraction rates of $21000\,$s$^{-1}$, and storage in the source with saturated $\textit{in-situ}$ density $273\,$cm$^{-3}$. The high stored density, low-energy UCN spectrum, and long storage times open new possibilities in fundamental and applied physics.

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2504.13030
PDF: https://arxiv.org/pdf/2504.13030
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DOI: https://doi.org/10.48550/arxiv.2504.13030

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Title: High-Density Ultracold Neutron Source for Low-Energy Particle Physics Experiments

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Language: en

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Publication year: 2025

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Publication date: 2025-04-17

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Authors: Skyler Degenkolb, E. Chanel, Simon Baudoin, Marie-Hélène Baurand, D. Beck, Juliette Blé, E. Bourgeat-Lami, Zeus Castillo, Hanno Filter, M. van der Grinten, Tobias Jenke, M. Jentschel, Victorien Joyet, E. Lelièvre‐Berna, Husain Manasawala, Thomas Neulinger, P. Fierlinger, K. Svirina, Xavier Tonon, O. Zimmer

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Landing page: https://arxiv.org/abs/2504.13030

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