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Ultracold neutron storage in a bottle coated with the fluoropolymer CYTOP

The fluoropolymer CYTOP was investigated in order to evaluate its suitability as a coating material for ultracold neutron (UCN) storage vessels. Using neutron reflectometry on CYTOP-coated silicon wafers, its neutron optical potential was measured to be 115.2(2) neV. UCN storage measurements were ca...

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Bibliographic Details
Main Authors: Neulinger, Thomas (Author) , Beck, Douglas (Author) , Connolly, Euan (Author) , Degenkolb, Skyler (Author) , Fierlinger, Peter (Author) , Filter, Hanno (Author) , Hingerl, Jürgen (Author) , Nordin, Pontus (Author) , Saerbeck, Thomas (Author) , Zimmer, Oliver (Author)
Format: Article (Journal)
Language:English
Published: 30 July 2022
In: The European physical journal. A, Hadrons and nuclei
Year: 2022, Volume: 58, Issue: 7, Pages: 1-14
ISSN:1434-601X
DOI:10.1140/epja/s10050-022-00791-x
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1140/epja/s10050-022-00791-x
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Author Notes:Thomas Neulinger, Douglas Beck, Euan Connolly, Skyler Degenkolb, Peter Fierlinger, Hanno Filter, Jürgen Hingerl, Pontus Nordin, Thomas Saerbeck, Oliver Zimmer
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Summary:The fluoropolymer CYTOP was investigated in order to evaluate its suitability as a coating material for ultracold neutron (UCN) storage vessels. Using neutron reflectometry on CYTOP-coated silicon wafers, its neutron optical potential was measured to be 115.2(2) neV. UCN storage measurements were carried out in a 3.8 l CYTOP-coated aluminum bottle, in which the storage time constant was found to increase from 311(9) s at room temperature to 564(7) s slightly above 10 K. By combining experimental storage data with simulations of the UCN source, the neutron loss factor of CYTOP is estimated to decrease from 1.1(1)$$\times 10^{-4}$$to 2.7(2)$$\times 10^{-5}$$at these temperatures, respectively. These results are of particular importance to the next-generation superthermal UCN source SuperSUN, currently under construction at the Institut Laue-Langevin, for which CYTOP is a possible top-surface coating in the UCN production volume.
Item Description:Gesehen am 05.09.2022
Physical Description:Online Resource
ISSN:1434-601X
DOI:10.1140/epja/s10050-022-00791-x

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