Design and performance of a cryogenic apparatus for magnetically trapping ultracold neutrons

P. R. Huffman; K. J. Coakley; J. M. Doyle; C. R. Huffer; H. P. Mumm; C. M. O'Shaughnessy; K. W. Schelhammer; P. N. Seo; L. Yang

doi:10.1016/j.cryogenics.2014.09.008

Design and performance of a cryogenic apparatus for magnetically trapping ultracold neutrons

P. R. Huffman, K. J. Coakley, J. M. Doyle, C. R. Huffer, H. P. Mumm, C. M. O'Shaughnessy, K. W. Schelhammer, P. N. Seo, L. Yang

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The cryogenic design and performance of an apparatus used to magnetically confine ultracold neutrons (UCN) is presented. The apparatus is part of an effort to measure the beta-decay lifetime of the free neutron and is comprised of a high-current superconducting magnetic trap that surrounds ∼21 l of isotopically pure ⁴He cooled to approximately 250 mK. A 0.89 nm neutron beam can enter the apparatus from one end of the magnetic trap and a light collection system allows visible light generated within the helium by decays to be transported to detectors at room temperature. Two cryocoolers are incorporated to reduce liquid helium consumption.

Original language	English (US)
Pages (from-to)	40-50
Number of pages	11
Journal	Cryogenics
Volume	64
DOIs	https://doi.org/10.1016/j.cryogenics.2014.09.008
State	Published - Nov 2014

Keywords

Cryocooler
Magnetic trap
Neutron lifetime
Ultracold neutrons

ASJC Scopus subject areas

General Materials Science
General Physics and Astronomy

Online availability

10.1016/j.cryogenics.2014.09.008

Library availability

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Cite this

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abstract = "The cryogenic design and performance of an apparatus used to magnetically confine ultracold neutrons (UCN) is presented. The apparatus is part of an effort to measure the beta-decay lifetime of the free neutron and is comprised of a high-current superconducting magnetic trap that surrounds ∼21 l of isotopically pure 4He cooled to approximately 250 mK. A 0.89 nm neutron beam can enter the apparatus from one end of the magnetic trap and a light collection system allows visible light generated within the helium by decays to be transported to detectors at room temperature. Two cryocoolers are incorporated to reduce liquid helium consumption.",

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AU - Huffman, P. R.

AU - Coakley, K. J.

AU - Doyle, J. M.

AU - Huffer, C. R.

AU - Mumm, H. P.

AU - O'Shaughnessy, C. M.

AU - Schelhammer, K. W.

AU - Seo, P. N.

AU - Yang, L.

PY - 2014/11

Y1 - 2014/11

N2 - The cryogenic design and performance of an apparatus used to magnetically confine ultracold neutrons (UCN) is presented. The apparatus is part of an effort to measure the beta-decay lifetime of the free neutron and is comprised of a high-current superconducting magnetic trap that surrounds ∼21 l of isotopically pure 4He cooled to approximately 250 mK. A 0.89 nm neutron beam can enter the apparatus from one end of the magnetic trap and a light collection system allows visible light generated within the helium by decays to be transported to detectors at room temperature. Two cryocoolers are incorporated to reduce liquid helium consumption.

AB - The cryogenic design and performance of an apparatus used to magnetically confine ultracold neutrons (UCN) is presented. The apparatus is part of an effort to measure the beta-decay lifetime of the free neutron and is comprised of a high-current superconducting magnetic trap that surrounds ∼21 l of isotopically pure 4He cooled to approximately 250 mK. A 0.89 nm neutron beam can enter the apparatus from one end of the magnetic trap and a light collection system allows visible light generated within the helium by decays to be transported to detectors at room temperature. Two cryocoolers are incorporated to reduce liquid helium consumption.

KW - Cryocooler

KW - Magnetic trap

KW - Neutron lifetime

KW - Ultracold neutrons

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Design and performance of a cryogenic apparatus for magnetically trapping ultracold neutrons

Abstract

Keywords

ASJC Scopus subject areas

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