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A large ‘Active Magnetic Shield’ for a high-precision experiment: nEDM collaboration

  • C. Abel
  • , N. J. Ayres
  • , G. Ban
  • , G. Bison
  • , K. Bodek
  • , V. Bondar
  • , T. Bouillaud
  • , E. Chanel
  • , J. Chen
  • , W. Chen
  • , P. J. Chiu
  • , C. B. Crawford
  • , M. Daum
  • , C. B. Doorenbos
  • , S. Emmenegger
  • , L. Ferraris-Bouchez
  • , M. Fertl
  • , A. Fratangelo
  • , W. C. Griffith
  • , Z. D. Grujic
  • P. Harris, K. Kirch, V. Kletzl, P. A. Koss, J. Krempel, B. Lauss, T. Lefort, P. Mullan, O. Naviliat-Cuncic, D. Pais, F. M. Piegsa, G. Pignol, M. Rawlik, I. Rienäcker, D. Ries, S. Roccia, D. Rozpedzik, W. Saenz-Arevalo, P. Schmidt-Wellenburg, A. Schnabel, E. P. Segarra, N. Severijns, T. Shelton, K. Svirina, R. Tavakoli Dinani, J. Thorne, R. Virot, N. Yazdandoost, J. Zejma, N. Ziehl, G. Zsigmond

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We present a novel Active Magnetic Shield (AMS), designed and implemented for the n2EDM experiment at the Paul Scherrer Institute. The experiment will perform a high-sensitivity search for the electric dipole moment of the neutron. Magnetic-field stability and control is of key importance for n2EDM. A large, cubic, 5 m side length, magnetically shielded room (MSR) provides a passive, quasi-static shielding-factor of about 10 5 for its inner sensitive volume. The AMS consists of a system of eight complex, feedback-controlled compensation coils constructed on an irregular grid spanned on a volume of less than 1000 m 3 around the MSR. The AMS is designed to provide a stable and uniform magnetic-field environment around the MSR, while being reasonably compact. The system can compensate static and variable magnetic fields up to ±50μT (homogeneous components) and ±5μT/m (first-order gradients), suppressing them to a few μ T in the sub-Hertz frequency range. The presented design concept and implementation of the AMS fulfills the requirements of the n2EDM experiment and can be useful for other applications, where magnetically silent environments are important and spatial constraints inhibit simpler geometrical solutions.

Original languageEnglish
Article number1061
JournalEuropean Physical Journal C
Volume83
Issue number11
DOIs
StatePublished - Nov 2023

Bibliographical note

Publisher Copyright:
© 2023, The Author(s).

Funding

We gratefully acknowledge the support provided by ETH and PSI technicians, electrical engineers and electricians. In particular, we appreciate the efforts of M. Meier, L. Noorda, A. Angerer, R. Wagner, S. Hug, R. Schwarz, M. Ettenreich, L. Künzi, D. Di Calafiori, P. Bryan, E. Hüsler, R. Käch, H. Scheppus. We acknowledge financial support from the Swiss National Science Foundation through projects No. 117696 (PSI), No. 137664 (PSI), No. 144473 (PSI), No. 157079 (PSI), No. 172626 (PSI), No. 126562 (PSI), No. 169596 (PSI), No. 178951 (PSI), No. 181996 (Bern), No. 162574 (ETH), No. 172639 (ETH), No. 200441 (ETH). The group from Jagiellonian University Cracow acknowledges the support of the National Science Center, Poland, Grants no. UMO-2015/18/M/ST2/00056, No. UMO-2020/37/B/ST2/02349, and No. 2018/30/M/ST2/00319, as well as by the Excellence Initiative - Research University Program at the Jagiellonian University. This work was supported by the Research Foundation-Flanders (BE) under Grant no. G.0D04.21N. Collaborators at the University of Sussex acknowledge support from the School of Mathematical and Physical Sciences, as well as from the STFC under Grant ST/S000798/1.We acknowledge the support from the DFG (DE) on PTB core facility center of ultra-low magnetic field KO 5321/3-1 and TR 408/11-1. We acknowledge funding provided by the Institute of Physics Belgrade through a grant by the Ministry of Education, Science and Technological Development of the Republic of Serbia. This work is also supported by Sigma Xi grants # \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\#$$\end{document} G2017100190747806 and # \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\#$$\end{document} G2019100190747806, and by the award of the Swiss Government Excellence Scholarships (SERI-FCS) # \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\#$$\end{document} 2015.0594. We gratefully acknowledge the support provided by ETH and PSI technicians, electrical engineers and electricians. In particular, we appreciate the efforts of M. Meier, L. Noorda, A. Angerer, R. Wagner, S. Hug, R. Schwarz, M. Ettenreich, L. Künzi, D. Di Calafiori, P. Bryan, E. Hüsler, R. Käch, H. Scheppus. We acknowledge financial support from the Swiss National Science Foundation through projects No. 117696 (PSI), No. 137664 (PSI), No. 144473 (PSI), No. 157079 (PSI), No. 172626 (PSI), No. 126562 (PSI), No. 169596 (PSI), No. 178951 (PSI), No. 181996 (Bern), No. 162574 (ETH), No. 172639 (ETH), No. 200441 (ETH). The group from Jagiellonian University Cracow acknowledges the support of the National Science Center, Poland, Grants no. UMO-2015/18/M/ST2/00056, No. UMO-2020/37/B/ST2/02349, and No. 2018/30/M/ST2/00319, as well as by the Excellence Initiative - Research University Program at the Jagiellonian University. This work was supported by the Research Foundation-Flanders (BE) under Grant no. G.0D04.21N. Collaborators at the University of Sussex acknowledge support from the School of Mathematical and Physical Sciences, as well as from the STFC under Grant ST/S000798/1.We acknowledge the support from the DFG (DE) on PTB core facility center of ultra-low magnetic field KO 5321/3-1 and TR 408/11-1. We acknowledge funding provided by the Institute of Physics Belgrade through a grant by the Ministry of Education, Science and Technological Development of the Republic of Serbia. This work is also supported by Sigma Xi grants G2017100190747806 and G2019100190747806, and by the award of the Swiss Government Excellence Scholarships (SERI-FCS) 2015.0594.

FundersFunder number
Jagiellonian University
Institute of Physics Belgrade
Swiss Government Excellence Scholarships
Fonds Wetenschappelijk Onderzoek
SERI-FCS
Eidgenössische Technische Hochschule Zürich
Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja
School of Mathematical and Physical Sciences
UK Industrial Decarbonization Research and Innovation Centre
Sigma XiaG2017100190747806, G2019100190747806
Sigma Xia
Narodowe Centrum NaukiUMO-2015/18/M/ST2/00056, 2018/30/M/ST2/00319, UMO-2020/37/B/ST2/02349
Narodowe Centrum Nauki
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung117696, 137664
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Deutsche ForschungsgemeinschaftTR 408/11-1, KO 5321/3-1
Deutsche Forschungsgemeinschaft
Paul Scherrer Institut172626, 200441, 181996, 162574, 126562, 172639, 157079, 178951, 144473, 169596
Paul Scherrer Institut
Science and Technology Facilities CouncilST/S000798/1
Science and Technology Facilities Council

    ASJC Scopus subject areas

    • Engineering (miscellaneous)
    • Physics and Astronomy (miscellaneous)

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