Ultracold neutron storage in a bottle coated with the fluoropolymer CYTOP

• Verfasst von: Neulinger, Thomas [VerfasserIn]
• Verfasst von: Beck, Douglas [VerfasserIn]
• Verfasst von: Connolly, Euan [VerfasserIn]
• Verfasst von: Degenkolb, Skyler [VerfasserIn]
• Verfasst von: Fierlinger, Peter [VerfasserIn]
• Verfasst von: Filter, Hanno [VerfasserIn]
• Verfasst von: Hingerl, Jürgen [VerfasserIn]
• Verfasst von: Nordin, Pontus [VerfasserIn]
• Verfasst von: Saerbeck, Thomas [VerfasserIn]
• Verfasst von: Zimmer, Oliver [VerfasserIn]
• Titel: Ultracold neutron storage in a bottle coated with the fluoropolymer CYTOP
• Verf.angabe: Thomas Neulinger, Douglas Beck, Euan Connolly, Skyler Degenkolb, Peter Fierlinger, Hanno Filter, Jürgen Hingerl, Pontus Nordin, Thomas Saerbeck, Oliver Zimmer
• E-Jahr: 2022
• Jahr: 30 July 2022
• Umfang: 14 S.
• Fussnoten: Gesehen am 05.09.2022
• Titel Quelle: Enthalten in: The European physical journal. A, Hadrons and nuclei
• Ort Quelle: Berlin : Springer, 1998
• Jahr Quelle: 2022
• Band/Heft Quelle: 58(2022), 7, Artikel-ID 141, Seite 1-14
• ISSN Quelle: 1434-601X
• DOI: doi:10.1140/epja/s10050-022-00791-x
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1815781238

Abstract

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.