Magnetic Field System in the nEDM@SNS Experiment

ORAL

Abstract

The neutron electric dipole moment (nEDM) is one of the most sensitive probes of charge-conjugation and parity (CP) violation. The current upper limit for the nEDM is dn < 1.8×10-26 e-cm (90% CL). The nEDM experiment at the Spallation Neutron Source (nEDM@SNS) aims to reduce this limit by two orders of magnitude. Targeting a sensitivity of < 3×10-28 e-cm, it is important to suppress false EDM signals due to the geometric phase effect which arises from nonuniformities in the magnetic field. The required uniform magnetic field, with gradients in the holding field < 3 ppm/cm, will be generated by a modified, saddle shaped cosθ coil enclosed in a nearly-hermetic superconducting lead shield. This talk will present the design, construction and status of the magnetic field system in the nEDM@SNS experiment.

*This material is based upon work supported by the U.S. National Science Foundation under Grants No. 1812340 and 1822502.

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Presenters

  • Alina A Aleksandrova

    • Caltech

Authors

  • Alina A Aleksandrova

    • Caltech

  • Larry Bartoszek

    • Bartoszek Engineering

  • Joe Benson

    • Caltech

  • Robert Carr

    • Caltech

  • Umit Hasan Coskun

    • University of Kentucky

  • Christopher Daurer

    • Hardline Ingenuity Inc

  • Bradley Filippone

    • Caltech

  • Roy J Holt

    • Caltech

  • Brad Plaster

    • University of Kentucky

  • John C Ramsey

    • Oak Ridge National Laboratory

  • Simon A Slutsky

    • Caltech

  • Xuan Sun

    • Caltech

  • Christopher M Swank

    • Caltech

  • Raymond Tat

    • Caltech

  • Wanchun Wei

    • Caltech