Magnetic-field uniformity in neutron electric-dipole-moment experiments

C. Abel; N. J. Ayres; T. Baker; G. Ban; G. Bison; K. Bodek; V. Bondar; C. B. Crawford; P. J. Chiu; E. Chanel; Z. Chowdhuri; M. Daum; B. Dechenaux; S. Emmenegger; L. Ferraris-Bouchez; P. Flaux; P. Geltenbort; K. Green; W. C. Griffith; M. Van Der Grinten; P. G. Harris; R. Henneck; N. Hild; P. Iaydjiev; S. N. Ivanov; M. Kasprzak; Y. Kermaidic; K. Kirch; H. C. Koch; S. Komposch; P. A. Koss; A. Kozela; J. Krempel; B. Lauss; T. Lefort; Y. Lemiere; A. Leredde; P. Mohanmurthy; D. Pais; F. M. Piegsa; G. Pignol; G. Quéméner; M. Rawlik; D. Rebreyend; D. Ries; S. Roccia; D. Rozpedzik; P. Schmidt-Wellenburg; A. Schnabel; N. Severijns; R. Virot; A. Weis; E. Wursten; G. Wyszynski; J. Zejma; G. Zsigmond

doi:10.1103/PhysRevA.99.042112

Magnetic-field uniformity in neutron electric-dipole-moment experiments

C. Abel, N. J. Ayres, T. Baker, G. Ban, G. Bison, K. Bodek, V. Bondar, C. B. Crawford, P. J. Chiu, E. Chanel, Z. Chowdhuri, M. Daum, B. Dechenaux, S. Emmenegger, L. Ferraris-Bouchez, P. Flaux, P. Geltenbort, K. Green, W. C. Griffith, M. Van Der GrintenP. G. Harris, R. Henneck, N. Hild, P. Iaydjiev, S. N. Ivanov, M. Kasprzak, Y. Kermaidic, K. Kirch, H. C. Koch, S. Komposch, P. A. Koss, A. Kozela, J. Krempel, B. Lauss, T. Lefort, Y. Lemiere, A. Leredde, P. Mohanmurthy, D. Pais, F. M. Piegsa, G. Pignol, G. Quéméner, M. Rawlik, D. Rebreyend, D. Ries, S. Roccia, D. Rozpedzik, P. Schmidt-Wellenburg, A. Schnabel, N. Severijns, R. Virot, A. Weis, E. Wursten, G. Wyszynski, J. Zejma, G. Zsigmond

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

23 Scopus citations

Abstract

Magnetic-field uniformity is of the utmost importance in experiments to measure the electric dipole moment of the neutron. A general parametrization of the magnetic field in terms of harmonic polynomial modes is proposed, going beyond the linear-gradients approximation. We review the main undesirable effects of nonuniformities: depolarization of ultracold neutrons and Larmor frequency shifts of neutrons and mercury atoms. The theoretical predictions for these effects were verified by dedicated measurements with the single-chamber neutron electric-dipole-moment apparatus installed at the Paul Scherrer Institute.

Original language	English
Article number	042112
Journal	Physical Review A
Volume	99
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevA.99.042112
State	Published - Apr 15 2019

Bibliographical note

Publisher Copyright:
© 2019 American Physical Society.

Funding

The experimental data were taken at PSI Villigen. We acknowledge the excellent support provided by the PSI technical groups and by various services of the collaborating universities and research laboratories. We gratefully acknowledge financial support from the Swiss National Science Foundation through Projects No. 200020-137664 (PSI), No. 200021-117696 (PSI), No. 200020-144473 (PSI), No. 200021-126562 (PSI), No. 200021-181996 (Bern), No. 200020-172639 (ETH), and No. 200020-140421 (Fri-bourg) and from STFC via Grants No. ST/M003426/1, No. ST/N504452/1, and No. ST/N000307/1. The LPC Caen and the LPSC Grenoble acknowledge the support of the French Agence Nationale de la Recherche (ANR) under Reference No. ANR-09-BLAN-0046 and the ERC Project No. 716651-NEDM. The Polish collaborators wish to acknowledge support from the National Science Center, Poland, under Grant No. 2015/18/M/ST2/00056. P.M. acknowledges Grant No. SERI-FCS 2015.0594. This work was also partly supported by the Fund for Scientific Research Flanders (FWO), and Project GOA/2010/10 of the KU Leuven. In addition we are grateful for access granted to the computing grid PL-Grid infrastructure. The German collaborators wish to acknowledge support from the DFG (DE) Priority Program SPP 1491.

Funders	Funder number
KU Leuven
Fonds National de la Recherche Scientifique (FNRS)
H2020 European Research Council
UK Industrial Decarbonization Research and Innovation Centre
STFC DiRAC	ST/M003426/1, ST/L006472/1, ST/N000307/1, ST/N504452/1
STFC DiRAC
French Agence Nationale de la Recherche	ANR-09-BLAN-0046
French Agence Nationale de la Recherche
Horizon 2020 Framework Programme	716651
Horizon 2020 Framework Programme
Fonds Wetenschappelijk Onderzoek	GOA/2010/10
Fonds Wetenschappelijk Onderzoek
Paul Scherrer Institut	200020-172639, 200021-126562, 200021-181996, 200021-117696, 200020-140421, 200020-144473
Paul Scherrer Institut
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	200020-137664
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Deutsche Forschungsgemeinschaft	SPP 1491
Deutsche Forschungsgemeinschaft
Narodowym Centrum Nauki	2015/18/M/ST2/00056
Narodowym Centrum Nauki

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.99.042112

Cite this

Abel, C., Ayres, N. J., Baker, T., Ban, G., Bison, G., Bodek, K., Bondar, V., Crawford, C. B., Chiu, P. J., Chanel, E., Chowdhuri, Z., Daum, M., Dechenaux, B., Emmenegger, S., Ferraris-Bouchez, L., Flaux, P., Geltenbort, P., Green, K., Griffith, W. C., ... Zsigmond, G. (2019). Magnetic-field uniformity in neutron electric-dipole-moment experiments. Physical Review A, 99(4), Article 042112. https://doi.org/10.1103/PhysRevA.99.042112

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abstract = "Magnetic-field uniformity is of the utmost importance in experiments to measure the electric dipole moment of the neutron. A general parametrization of the magnetic field in terms of harmonic polynomial modes is proposed, going beyond the linear-gradients approximation. We review the main undesirable effects of nonuniformities: depolarization of ultracold neutrons and Larmor frequency shifts of neutrons and mercury atoms. The theoretical predictions for these effects were verified by dedicated measurements with the single-chamber neutron electric-dipole-moment apparatus installed at the Paul Scherrer Institute.",

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Abel, C, Ayres, NJ, Baker, T, Ban, G, Bison, G, Bodek, K, Bondar, V, Crawford, CB, Chiu, PJ, Chanel, E, Chowdhuri, Z, Daum, M, Dechenaux, B, Emmenegger, S, Ferraris-Bouchez, L, Flaux, P, Geltenbort, P, Green, K, Griffith, WC, Van Der Grinten, M, Harris, PG, Henneck, R, Hild, N, Iaydjiev, P, Ivanov, SN, Kasprzak, M, Kermaidic, Y, Kirch, K, Koch, HC, Komposch, S, Koss, PA, Kozela, A, Krempel, J, Lauss, B, Lefort, T, Lemiere, Y, Leredde, A, Mohanmurthy, P, Pais, D, Piegsa, FM, Pignol, G, Quéméner, G, Rawlik, M, Rebreyend, D, Ries, D, Roccia, S, Rozpedzik, D, Schmidt-Wellenburg, P, Schnabel, A, Severijns, N, Virot, R, Weis, A, Wursten, E, Wyszynski, G, Zejma, J & Zsigmond, G 2019, 'Magnetic-field uniformity in neutron electric-dipole-moment experiments', Physical Review A, vol. 99, no. 4, 042112. https://doi.org/10.1103/PhysRevA.99.042112

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AU - Ayres, N. J.

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AU - Ban, G.

AU - Bison, G.

AU - Bodek, K.

AU - Bondar, V.

AU - Crawford, C. B.

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AU - Chanel, E.

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AU - Koss, P. A.

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AU - Krempel, J.

AU - Lauss, B.

AU - Lefort, T.

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AU - Zsigmond, G.

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Magnetic-field uniformity in neutron electric-dipole-moment experiments

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

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