Upgrading the Radium-EDM Experiment through Improved Electric Field Reversibility and Calibration of the Isotope Harvesting Efficiency from FRIB

ORAL

Abstract

An experimentally observed non-zero atomic EDM (electric dipole moment) would be a signature of CP-violation (charge-parity), and, at present levels of sensitivity, also a sign of physics Beyond the Standard Model. The Radium-EDM experiment at Argonne National Laboratory searches for the atomic EDM of Radium-225 utilizing laser cooling and trapping techniques. This isotope has an octupole deformation (pear-shaped) of its nucleus, giving it a large nuclear Schiff moment, and consequently an enhanced atomic EDM. Our previous search had an EDM sensitivity of 10^-23 e*cm. Two key upgrades involve improvements to our electric field apparatus and the formation of a hot atomic beam of atoms harvested from the water beam dump at the Facility for Rare Isotope Beams (FRIB). We will describe our ongoing studies to improve the reversibility of the electric field and to calibrate the efficiency of isotope harvesting from FRIB. The target new physics sensitivity for our next measurement run is comparable to that of the present Hg-199 atomic EDM limit, which currently sets the best limits on new CP-violating sources within the hadronic sector.

*This work is supported the U.S. DOE, Office of Science, Office of Nuclear Physics, under contracts DE-AC02-06CH11357 and DE-SC0019455.

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Presenters

  • Gordon Arrowsmith-Kron

    • Michigan State University, Facility for Rare Isotope Beams

Authors

  • Gordon Arrowsmith-Kron

    • Michigan State University, Facility for Rare Isotope Beams

  • Kevin G Bailey

    • Argonne National Laboratory

  • Michael N Bishof

    • Argonne National Laboratory

  • Aiden Boyer

    • Facility for Rare Isotope Beams
    • Michigan State University, Facility for Rare Isotope Beams

  • John P Greene

    • Argonne National Laboratory

  • Himanshi Himanshi

    • Facility for Rare Isotope Beams
    • Michigan State University, Facility for Rare Isotope Beams

  • Peter Mueller

    • Argonne National Laboratory

  • Thomas P O'Connor

    • Argonne National Laboratory

  • Gregory Severin

    • Facility for Rare Isotope Beams

  • Jaideep T Singh

    • Facility for Rare Isotope Beams, Michigan State University
    • Michigan State University, Facility for Rare Isotope Beams