A new method for measuring the neutron lifetime using an in situ neutron detector

C. L. Morris; E. R. Adamek; L. J. Broussard; N. B. Callahan; S. M. Clayton; C. Cude-Woods; S. A. Currie; X. Ding; W. Fox; K. P. Hickerson; M. A. Hoffbauer; A. T. Holley; A. Komives; C. Y. Liu; M. Makela; R. W. Pattie; J. Ramsey; D. J. Salvat; A. Saunders; S. J. Seestrom; E. I. Sharapov; S. K. Sjue; Z. Tang; J. Vanderwerp; B. Vogelaar; P. L. Walstrom; Z. Wang; Wanchun Wei; J. W. Wexler; T. L. Womack; A. R. Young; B. A. Zeck

doi:10.1063/1.4983578

A new method for measuring the neutron lifetime using an in situ neutron detector

C. L. Morris, E. R. Adamek, L. J. Broussard, N. B. Callahan, S. M. Clayton, C. Cude-Woods, S. A. Currie, X. Ding, W. Fox, K. P. Hickerson, M. A. Hoffbauer, A. T. Holley, A. Komives, C. Y. Liu, M. Makela, R. W. Pattie, J. Ramsey, D. J. Salvat, A. Saunders, S. J. SeestromE. I. Sharapov, S. K. Sjue, Z. Tang, J. Vanderwerp, B. Vogelaar, P. L. Walstrom, Z. Wang, Wanchun Wei, J. W. Wexler, T. L. Womack, A. R. Young, B. A. Zeck

Neutron Symmetries

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Abstract

In this paper, we describe a new method for measuring surviving neutrons in neutron lifetime measurements using bottled ultracold neutrons (UCN), which provides better characterization of systematic uncertainties and enables higher precision than previous measurement techniques. An active detector that can be lowered into the trap has been used to measure the neutron distribution as a function of height and measure the influence of marginally trapped UCN on the neutron lifetime measurement. In addition, measurements have demonstrated phase-space evolution and its effect on the lifetime measurement.

Original language	English
Article number	053508
Journal	Review of Scientific Instruments
Volume	88
Issue number	5
DOIs	https://doi.org/10.1063/1.4983578
State	Published - May 1 2017

Funding

This work was supported by the Los Alamos LDRD office, the Department of Energy, the National Science Foundation (Nos. 1307426 and 1553861), and DOE Low Energy Nuclear Physics (No. DE-FG02-97ER41042). The authors would like to thank the staff of LANSCE for their diligent efforts to develop the diagnostics and new techniques required to provide beam for this experiment.This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Funders	Funder number
National Science Foundation	1506459, 1306997, 1307426
National Science Foundation

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Morris, C. L., Adamek, E. R., Broussard, L. J., Callahan, N. B., Clayton, S. M., Cude-Woods, C., Currie, S. A., Ding, X., Fox, W., Hickerson, K. P., Hoffbauer, M. A., Holley, A. T., Komives, A., Liu, C. Y., Makela, M., Pattie, R. W., Ramsey, J., Salvat, D. J., Saunders, A., ... Zeck, B. A. (2017). A new method for measuring the neutron lifetime using an in situ neutron detector. Review of Scientific Instruments, 88(5), Article 053508. https://doi.org/10.1063/1.4983578

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title = "A new method for measuring the neutron lifetime using an in situ neutron detector",

abstract = "In this paper, we describe a new method for measuring surviving neutrons in neutron lifetime measurements using bottled ultracold neutrons (UCN), which provides better characterization of systematic uncertainties and enables higher precision than previous measurement techniques. An active detector that can be lowered into the trap has been used to measure the neutron distribution as a function of height and measure the influence of marginally trapped UCN on the neutron lifetime measurement. In addition, measurements have demonstrated phase-space evolution and its effect on the lifetime measurement.",

author = "Morris, {C. L.} and Adamek, {E. R.} and Broussard, {L. J.} and Callahan, {N. B.} and Clayton, {S. M.} and C. Cude-Woods and Currie, {S. A.} and X. Ding and W. Fox and Hickerson, {K. P.} and Hoffbauer, {M. A.} and Holley, {A. T.} and A. Komives and Liu, {C. Y.} and M. Makela and Pattie, {R. W.} and J. Ramsey and Salvat, {D. J.} and A. Saunders and Seestrom, {S. J.} and Sharapov, {E. I.} and Sjue, {S. K.} and Z. Tang and J. Vanderwerp and B. Vogelaar and Walstrom, {P. L.} and Z. Wang and Wanchun Wei and Wexler, {J. W.} and Womack, {T. L.} and Young, {A. R.} and Zeck, {B. A.}",

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doi = "10.1063/1.4983578",

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Morris, CL, Adamek, ER, Broussard, LJ, Callahan, NB, Clayton, SM, Cude-Woods, C, Currie, SA, Ding, X, Fox, W, Hickerson, KP, Hoffbauer, MA, Holley, AT, Komives, A, Liu, CY, Makela, M, Pattie, RW, Ramsey, J, Salvat, DJ, Saunders, A, Seestrom, SJ, Sharapov, EI, Sjue, SK, Tang, Z, Vanderwerp, J, Vogelaar, B, Walstrom, PL, Wang, Z, Wei, W, Wexler, JW, Womack, TL, Young, AR & Zeck, BA 2017, 'A new method for measuring the neutron lifetime using an in situ neutron detector', Review of Scientific Instruments, vol. 88, no. 5, 053508. https://doi.org/10.1063/1.4983578

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AU - Morris, C. L.

AU - Adamek, E. R.

AU - Broussard, L. J.

AU - Callahan, N. B.

AU - Clayton, S. M.

AU - Cude-Woods, C.

AU - Currie, S. A.

AU - Ding, X.

AU - Fox, W.

AU - Hickerson, K. P.

AU - Hoffbauer, M. A.

AU - Holley, A. T.

AU - Komives, A.

AU - Liu, C. Y.

AU - Makela, M.

AU - Pattie, R. W.

AU - Ramsey, J.

AU - Salvat, D. J.

AU - Saunders, A.

AU - Seestrom, S. J.

AU - Sharapov, E. I.

AU - Sjue, S. K.

AU - Tang, Z.

AU - Vanderwerp, J.

AU - Vogelaar, B.

AU - Walstrom, P. L.

AU - Wang, Z.

AU - Wei, Wanchun

AU - Wexler, J. W.

AU - Womack, T. L.

AU - Young, A. R.

AU - Zeck, B. A.

PY - 2017/5/1

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N2 - In this paper, we describe a new method for measuring surviving neutrons in neutron lifetime measurements using bottled ultracold neutrons (UCN), which provides better characterization of systematic uncertainties and enables higher precision than previous measurement techniques. An active detector that can be lowered into the trap has been used to measure the neutron distribution as a function of height and measure the influence of marginally trapped UCN on the neutron lifetime measurement. In addition, measurements have demonstrated phase-space evolution and its effect on the lifetime measurement.

AB - In this paper, we describe a new method for measuring surviving neutrons in neutron lifetime measurements using bottled ultracold neutrons (UCN), which provides better characterization of systematic uncertainties and enables higher precision than previous measurement techniques. An active detector that can be lowered into the trap has been used to measure the neutron distribution as a function of height and measure the influence of marginally trapped UCN on the neutron lifetime measurement. In addition, measurements have demonstrated phase-space evolution and its effect on the lifetime measurement.

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JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

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M1 - 053508

ER -

A new method for measuring the neutron lifetime using an in situ neutron detector

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