Generating a highly uniform magnetic field inside the magnetically shielded room of the n2EDM experiment
We present a coil system designed to generate a highly uniform magnetic field for the n2EDM experiment at the Paul Scherrer Institute. It consists of a main <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>B</mml:mi> <mml:mn>0</mml:mn></mml:msub> </mml:math> coil and a set of auxiliary coils mounted on a cubic structure with a side length of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>273</mml:mn> <mml:mspace></mml:mspace> <mml:mtext>cm</mml:mtext></mml:mrow> </mml:math> , inside a large magnetically shielded room (MSR). We have assembled this system and characterized its performances with a mapping robot. The apparatus is able to generate a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1</mml:mn> <mml:mspace></mml:mspace> <mml:mi>μ</mml:mi> <mml:mtext>T</mml:mtext></mml:mrow> </mml:math> vertical field with a relative root mean square deviation <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>σ</mml:mi> <mml:mrow><mml:mo>(</mml:mo> <mml:msub><mml:mi>B</mml:mi> <mml:mi>z</mml:mi></mml:msub> <mml:mo>)</mml:mo></mml:mrow> <mml:mo>/</mml:mo> <mml:msub><mml:mi>B</mml:mi> <mml:mi>z</mml:mi></mml:msub> <mml:mo>=</mml:mo> <mml:mn>3</mml:mn> <mml:mo>×</mml:mo> <mml:msup><mml:mn>10</mml:mn> <mml:mrow><mml:mo>-</mml:mo> <mml:mn>5</mml:mn></mml:mrow> </mml:msup> </mml:mrow> </mml:math> over the volume of interest, a cylinder of radius <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>40</mml:mn> <mml:mspace></mml:mspace> <mml:mtext>cm</mml:mtext></mml:mrow> </mml:math> and height <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>30</mml:mn> <mml:mspace></mml:mspace> <mml:mtext>cm</mml:mtext></mml:mrow> </mml:math> . This level of uniformity overcomes the n2EDM requirements, allowing a measurement of the neutron Electric Dipole Moment with a sensitivity better than <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1</mml:mn> <mml:mo>×</mml:mo> <mml:msup><mml:mn>10</mml:mn> <mml:mrow><mml:mo>-</mml:mo> <mml:mn>27</mml:mn></mml:mrow> </mml:msup> <mml:mi>e</mml:mi> <mml:mspace></mml:mspace> <mml:mtext>cm</mml:mtext></mml:mrow> </mml:math> .
Authors
- E Chanel
- P. S. Mullan (ORCID: https://orcid.org/0009-0002-8926-010X)
- R. Virot (ORCID: https://orcid.org/0000-0003-3706-4537)
- Jean-Pierre Menu
- P Flaux
- L. Ferraris-Bouchez
- E. Wursten (ORCID: https://orcid.org/0000-0002-2413-2214)
- Aaron Mullins (ORCID: https://orcid.org/0000-0003-0494-1687)
- A. Fratangelo
- Reza Tavakoli (ORCID: https://orcid.org/0000-0003-0835-0294)
- G. Qúeḿener (ORCID: https://orcid.org/0000-0001-6703-6655)
- K. Svirina (ORCID: https://orcid.org/0000-0002-2679-9020)
- G. Bison (ORCID: https://orcid.org/0000-0002-0624-6672)
- Jacob Thorne (ORCID: https://orcid.org/0000-0002-3905-5549)
- Jens Voigt
- M. Fertl (ORCID: https://orcid.org/0000-0002-1925-2553)
- V Kletzl
- C. Abel (ORCID: https://orcid.org/0000-0002-6707-0586)
- Kristien Michielsen (ORCID: https://orcid.org/0000-0002-4119-6770)
- N. Yazdandoost (ORCID: https://orcid.org/0000-0001-6768-795X)
- K. Kirch (ORCID: https://orcid.org/0000-0002-1720-7636)
- T Bouillaud (ORCID: https://orcid.org/0009-0007-3247-5587)
- A. Schnabel (ORCID: https://orcid.org/0000-0002-7583-0098)
- O. Naviliat-Cuncic (ORCID: https://orcid.org/0000-0001-5082-2131)
- N. Ziehl (ORCID: https://orcid.org/0000-0002-0136-3300)
- S. Komposch
- D. Rozpędzik (ORCID: https://orcid.org/0000-0003-3650-4203)
- N. J. Ayres (ORCID: https://orcid.org/0000-0002-5565-0807)
- J Vankeirsbilck
- M. Meier (ORCID: https://orcid.org/0000-0003-0918-6473)
- B. Lauss (ORCID: https://orcid.org/0000-0002-1986-391X)
- D Pais
- W Chen
- G. Asryan (ORCID: https://orcid.org/0000-0001-5606-0350)
- C.B Doorenbos
- P.-J. Chiu (ORCID: https://orcid.org/0000-0002-3772-0090)
- F.M Piegsa
- Selim Touati (ORCID: https://orcid.org/0000-0002-6508-1177)
- В. М. Бондар (ORCID: https://orcid.org/0000-0003-4311-035X)
- D. Rebreyend (ORCID: https://orcid.org/0000-0002-0240-0599)
- B. Dechenaux (ORCID: https://orcid.org/0000-0001-7936-2765)
- I. Rienaecker
- G. Zsigmond (ORCID: https://orcid.org/0000-0003-3476-751X)
- Christopher Crawford (ORCID: https://orcid.org/0000-0002-1932-4334)
- J. Zejma (ORCID: https://orcid.org/0000-0003-4843-1451)
- S Emmenegger
- D Ries
- Colin A. Smith (ORCID: https://orcid.org/0000-0002-4651-167X)
- Daniel Hohl (ORCID: https://orcid.org/0000-0001-6337-7110)
- M. Kasprzak (ORCID: https://orcid.org/0000-0002-2232-3439)
- Z. D. Grujić
- W. C. Griffith (ORCID: https://orcid.org/0000-0002-0260-1956)
- D. Goupillière
- A. Lejuez
- Rui Li (ORCID: https://orcid.org/0000-0002-4452-8486)
- K. Bodek (ORCID: https://orcid.org/0000-0002-2866-2837)
- M. Rawlik (ORCID: https://orcid.org/0000-0002-1232-4497)
- P. Schmidt-Wellenburg (ORCID: https://orcid.org/0000-0001-5474-672X)
- T. Lefort (ORCID: https://orcid.org/0000-0003-2198-2093)
- P. A. Koss
- S. Roccia
- G. Pignol
- J. Krempel
- D. E. Bowles
- G. Ban
- G. L. Caratsch
- N. Severijns
Institutions
- University of Bern (CH)
- Jagiellonian University (PL)
- Physikalisch-Technische Bundesanstalt (DE)
- Centre National de la Recherche Scientifique (FR)
- Albert Einstein College of Medicine (US)
- University of Kentucky (US)
- University of Sussex (GB)
- École Nationale Supérieure d'Ingénieurs de Caen (FR)
- Imec the Netherlands (NL)
- Johannes Gutenberg University Mainz (DE)
- University of Zurich (CH)
- Paul Scherrer Institute (CH)
- ETH Zurich (CH)
- University of Belgrade (RS)
- Institute of Physics (PL)
- Fraunhofer Institute for Physical Measurement Techniques (DE)
- Laboratoire de Physique Corpusculaire de Caen (FR)
- RIKEN (JP)
- Institut Laue-Langevin (FR)
- Institut National de Physique Nucléaire et de Physique des Particules (FR)
- Institute of Physics Belgrade (RS)
- Institute for Fundamental Physics of the Universe (IT)
- European Organization for Nuclear Research (CH)
- Université Grenoble Alpes (FR)
- Université de Caen Normandie (FR)
- KU Leuven (BE)
Publication Details
- Journal
- The European Physical Journal C
- Published
- 2025-02-20
- DOI
- https://doi.org/10.1140/epjc/s10052-025-13902-x
- Primary Topic
- Atomic and Subatomic Physics Research
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Deutsche Forschungsgemeinschaft
- Agence Nationale de la Recherche
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Science and Technology Facilities Council
- European Research Council
- H2020 Marie Skłodowska-Curie Actions