The design of the n2EDM experiment: nEDM Collaboration

N J Ayres; G Ban; L Bienstman; G Bison; K Bodek; V Bondar; T Bouillaud; E Chanel; J Chen; P-J Chiu; B Clément; C B Crawford; M Daum; B Dechenaux; C B Doorenbos; S Emmenegger; L Ferraris-Bouchez; M Fertl; A Fratangelo; P Flaux; D Goupillière; W C Griffith; Z D Grujic; P G Harris; K Kirch; P A Koss; J Krempel; B Lauss; T Lefort; Y Lemière; A Leredde; M Meier; J Menu; D A Mullins; O Naviliat-Cuncic; D Pais; F M Piegsa; G Pignol; G Quéméner; M Rawlik; D Rebreyend; I Rienäcker; D Ries; S Roccia; K U Ross; D Rozpedzik; W Saenz; P Schmidt-Wellenburg; A Schnabel; N Severijns; B Shen; T Stapf; K Svirina; R Tavakoli Dinani; S Touati; J Thorne; R Virot; J Voigt; E Wursten; N Yazdandoost; J Zejma; G Zsigmond

doi:10.1140/epjc/s10052-021-09298-z

The design of the n2EDM experiment: nEDM Collaboration

Eur Phys J C Part Fields. 2021;81(6):512. doi: 10.1140/epjc/s10052-021-09298-z. Epub 2021 Jun 12.

Authors

N J Ayres¹, G Ban², L Bienstman³, G Bison⁴, K Bodek⁵, V Bondar¹, T Bouillaud⁶, E Chanel⁷, J Chen², P-J Chiu^{1

4}, B Clément⁶, C B Crawford⁸, M Daum⁴, B Dechenaux², C B Doorenbos^{1

4}, S Emmenegger¹, L Ferraris-Bouchez⁶, M Fertl⁹, A Fratangelo⁷, P Flaux², D Goupillière², W C Griffith¹⁰, Z D Grujic¹¹, P G Harris¹⁰, K Kirch^{1

4}, P A Koss^{3

12}, J Krempel¹, B Lauss⁴, T Lefort², Y Lemière², A Leredde⁶, M Meier⁴, J Menu⁶, D A Mullins⁷, O Naviliat-Cuncic², D Pais^{1

4}, F M Piegsa⁷, G Pignol⁶, G Quéméner², M Rawlik^{1

13}, D Rebreyend⁶, I Rienäcker^{1

4}, D Ries¹⁴, S Roccia⁶, K U Ross¹⁴, D Rozpedzik⁵, W Saenz², P Schmidt-Wellenburg⁴, A Schnabel¹⁵, N Severijns³, B Shen¹⁴, T Stapf⁴, K Svirina⁶, R Tavakoli Dinani³, S Touati⁶, J Thorne⁷, R Virot⁶, J Voigt¹⁵, E Wursten³, N Yazdandoost¹⁴, J Zejma⁵, G Zsigmond⁴

Affiliations

¹ Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zurich, Switzerland.
² Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France.
³ Institute for Nuclear and Radiation Physics, KU Leuven, 3001 Leuven, Belgium.
⁴ Paul Scherrer Institut (PSI), 5232 Villigen, Switzerland.
⁵ Marian Smoluchowski Institute of Physics, Jagiellonian University, 30-348 Cracow, Poland.
⁶ LPSC, Université Grenoble Alpes, CNRS/IN2P3, Grenoble, France.
⁷ Albert Einstein Center for Fundamental Physics, University of Bern, 3012 Bern, Switzerland.
⁸ University of Kentucky, Lexington, USA.
⁹ Institute of Physics, Johannes Gutenberg University, 55128 Mainz, Germany.
¹⁰ Department of Physics and Astronomy, University of Sussex, Falmer, Brighton, BN1 9QH UK.
¹¹ Institute of Physics Belgrade, University of Belgrade, 11080 Belgrade, Serbia.
¹² Present Address: Fraunhofer Institute for Physical Measurement Techniques, 79110 Freiburg, Germany.
¹³ Present Address: Paul Scherrer Institut (PSI), 5232 Villigen, Switzerland.
¹⁴ Department of Chemistry-TRIGA site, Johannes Gutenberg University, 55128 Mainz, Germany.
¹⁵ Physikalisch Technische Bundesanstalt, Berlin, Germany.

Abstract

We present the design of a next-generation experiment, n2EDM, currently under construction at the ultracold neutron source at the Paul Scherrer Institute (PSI) with the aim of carrying out a high-precision search for an electric dipole moment of the neutron. The project builds on experience gained with the previous apparatus operated at PSI until 2017, and is expected to deliver an order of magnitude better sensitivity with provision for further substantial improvements. An overview is of the experimental method and setup is given, the sensitivity requirements for the apparatus are derived, and its technical design is described.