Measurement of spin-flip probabilities for ultracold neutrons interacting with nickel phosphorus coated surfaces

Z. Tang; E. R. Adamek; A. Brandt; N. B. Callahan; S. M. Clayton; S. A. Currie; T. M. Ito; M. Makela; Y. Masuda; C. L. Morris; R. W. Pattie; J. C. Ramsey; D. J. Salvat; A. Saunders; A. R. Young

doi:10.1016/j.nima.2016.04.098

Measurement of spin-flip probabilities for ultracold neutrons interacting with nickel phosphorus coated surfaces

Z. Tang, E. R. Adamek, A. Brandt, N. B. Callahan, S. M. Clayton, S. A. Currie, T. M. Ito, M. Makela, Y. Masuda, C. L. Morris, R. W. Pattie, J. C. Ramsey, D. J. Salvat, A. Saunders, A. R. Young

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

7 Scopus citations

Abstract

We report a measurement of the spin-flip probabilities for ultracold neutrons interacting with surfaces coated with nickel phosphorus. For 50 μm thick nickel phosphorus coated on stainless steel, the spin-flip probability per bounce was found to be _βNiPonSS=(3.3-5.6+1.8)×^10-6. For 50 μm thick nickel phosphorus coated on aluminum, the spin-flip probability per bounce was found to be _βNiPonAl=(3.6-5.9+2.1)×^10-6. For the copper guide used as reference, the spin flip probability per bounce was found to be _βCu=(6.7-2.5+5.0)×^10-6. The results on the nickel phosphorus-coated surfaces may be interpreted as upper limits, yielding _βNiPonSS<6.2×^10-6 (90% C.L.) and _βNiPonAl<7.0×^10-6 (90% C.L.) for 50 μm thick nickel phosphorus coated on stainless steel and 50 μm thick nickel phosphorus coated on aluminum, respectively. Nickel phosphorus coated stainless steel or aluminum provides a solution when low-cost, mechanically robust, and non-depolarizing UCN guides with a high Fermi potential are needed.

Original language	English
Pages (from-to)	32-38
Number of pages	7
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	827
DOIs	https://doi.org/10.1016/j.nima.2016.04.098
State	Published - Aug 11 2016
Externally published	Yes

Funding

This work was supported by Los Alamos National Laboratory LDRD Program (Project No. 20140015DR ). We gratefully acknowledge the support provided by the LANL Physics and AOT Divisions .

Funders	Funder number
Los Alamos National Laboratory	20140015DR

Keywords

Nickel phosphorus
Spin depolarization
Ultracold neutron
Ultracold neutron guide

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10.1016/j.nima.2016.04.098

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Tang, Z., Adamek, E. R., Brandt, A., Callahan, N. B., Clayton, S. M., Currie, S. A., Ito, T. M., Makela, M., Masuda, Y., Morris, C. L., Pattie, R. W., Ramsey, J. C., Salvat, D. J., Saunders, A., & Young, A. R. (2016). Measurement of spin-flip probabilities for ultracold neutrons interacting with nickel phosphorus coated surfaces. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 827, 32-38. https://doi.org/10.1016/j.nima.2016.04.098

@article{59b4a0b6c82846eb93d0636dcf9b6c25,

title = "Measurement of spin-flip probabilities for ultracold neutrons interacting with nickel phosphorus coated surfaces",

abstract = "We report a measurement of the spin-flip probabilities for ultracold neutrons interacting with surfaces coated with nickel phosphorus. For 50 μm thick nickel phosphorus coated on stainless steel, the spin-flip probability per bounce was found to be βNiPonSS=(3.3-5.6+1.8)×10-6. For 50 μm thick nickel phosphorus coated on aluminum, the spin-flip probability per bounce was found to be βNiPonAl=(3.6-5.9+2.1)×10-6. For the copper guide used as reference, the spin flip probability per bounce was found to be βCu=(6.7-2.5+5.0)×10-6. The results on the nickel phosphorus-coated surfaces may be interpreted as upper limits, yielding βNiPonSS<6.2×10-6 (90% C.L.) and βNiPonAl<7.0×10-6 (90% C.L.) for 50 μm thick nickel phosphorus coated on stainless steel and 50 μm thick nickel phosphorus coated on aluminum, respectively. Nickel phosphorus coated stainless steel or aluminum provides a solution when low-cost, mechanically robust, and non-depolarizing UCN guides with a high Fermi potential are needed.",

keywords = "Nickel phosphorus, Spin depolarization, Ultracold neutron, Ultracold neutron guide",

author = "Z. Tang and Adamek, {E. R.} and A. Brandt and Callahan, {N. B.} and Clayton, {S. M.} and Currie, {S. A.} and Ito, {T. M.} and M. Makela and Y. Masuda and Morris, {C. L.} and Pattie, {R. W.} and Ramsey, {J. C.} and Salvat, {D. J.} and A. Saunders and Young, {A. R.}",

year = "2016",

month = aug,

day = "11",

doi = "10.1016/j.nima.2016.04.098",

language = "English",

volume = "827",

pages = "32--38",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

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Tang, Z, Adamek, ER, Brandt, A, Callahan, NB, Clayton, SM, Currie, SA, Ito, TM, Makela, M, Masuda, Y, Morris, CL, Pattie, RW, Ramsey, JC, Salvat, DJ, Saunders, A & Young, AR 2016, 'Measurement of spin-flip probabilities for ultracold neutrons interacting with nickel phosphorus coated surfaces', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 827, pp. 32-38. https://doi.org/10.1016/j.nima.2016.04.098

Measurement of spin-flip probabilities for ultracold neutrons interacting with nickel phosphorus coated surfaces. / Tang, Z.; Adamek, E. R.; Brandt, A. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 827, 11.08.2016, p. 32-38.

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

TY - JOUR

T1 - Measurement of spin-flip probabilities for ultracold neutrons interacting with nickel phosphorus coated surfaces

AU - Tang, Z.

AU - Adamek, E. R.

AU - Brandt, A.

AU - Callahan, N. B.

AU - Clayton, S. M.

AU - Currie, S. A.

AU - Ito, T. M.

AU - Makela, M.

AU - Masuda, Y.

AU - Morris, C. L.

AU - Pattie, R. W.

AU - Ramsey, J. C.

AU - Salvat, D. J.

AU - Saunders, A.

AU - Young, A. R.

PY - 2016/8/11

Y1 - 2016/8/11

N2 - We report a measurement of the spin-flip probabilities for ultracold neutrons interacting with surfaces coated with nickel phosphorus. For 50 μm thick nickel phosphorus coated on stainless steel, the spin-flip probability per bounce was found to be βNiPonSS=(3.3-5.6+1.8)×10-6. For 50 μm thick nickel phosphorus coated on aluminum, the spin-flip probability per bounce was found to be βNiPonAl=(3.6-5.9+2.1)×10-6. For the copper guide used as reference, the spin flip probability per bounce was found to be βCu=(6.7-2.5+5.0)×10-6. The results on the nickel phosphorus-coated surfaces may be interpreted as upper limits, yielding βNiPonSS<6.2×10-6 (90% C.L.) and βNiPonAl<7.0×10-6 (90% C.L.) for 50 μm thick nickel phosphorus coated on stainless steel and 50 μm thick nickel phosphorus coated on aluminum, respectively. Nickel phosphorus coated stainless steel or aluminum provides a solution when low-cost, mechanically robust, and non-depolarizing UCN guides with a high Fermi potential are needed.

AB - We report a measurement of the spin-flip probabilities for ultracold neutrons interacting with surfaces coated with nickel phosphorus. For 50 μm thick nickel phosphorus coated on stainless steel, the spin-flip probability per bounce was found to be βNiPonSS=(3.3-5.6+1.8)×10-6. For 50 μm thick nickel phosphorus coated on aluminum, the spin-flip probability per bounce was found to be βNiPonAl=(3.6-5.9+2.1)×10-6. For the copper guide used as reference, the spin flip probability per bounce was found to be βCu=(6.7-2.5+5.0)×10-6. The results on the nickel phosphorus-coated surfaces may be interpreted as upper limits, yielding βNiPonSS<6.2×10-6 (90% C.L.) and βNiPonAl<7.0×10-6 (90% C.L.) for 50 μm thick nickel phosphorus coated on stainless steel and 50 μm thick nickel phosphorus coated on aluminum, respectively. Nickel phosphorus coated stainless steel or aluminum provides a solution when low-cost, mechanically robust, and non-depolarizing UCN guides with a high Fermi potential are needed.

KW - Nickel phosphorus

KW - Spin depolarization

KW - Ultracold neutron

KW - Ultracold neutron guide

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DO - 10.1016/j.nima.2016.04.098

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SN - 0168-9002

VL - 827

SP - 32

EP - 38

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

Measurement of spin-flip probabilities for ultracold neutrons interacting with nickel phosphorus coated surfaces

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