Measuring the Electric Dipole Moment of the Electron in a Two-Energy Spin-Transparent Storage Ring

Conference · Mon Aug 01 04:00:00 EDT 2022

DOI:https://doi.org/10.2172/2204638· OSTI ID:2204638

Suleiman, R. ^[1]; Derbenev, Y. S. ^[1]; Morozov, V. S. ^[2]

---

1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We will present a new design of a two-energy storage ring for low energy (0.2 to 2 MeV) polarized electron bunches [1]. The new design is based on the transparent spin methodology that cancels the spin precession due to the magnetic dipole moment at any energy while allowing for spin precession induced by the fundamental physics of interest to accumulate. The buildup of the vertical component of beam polarization can be measured using standard Mott polarimetry that is optimal at low electron energy. These rings can be used to measure the permanent electric dipole moment of the electron, relevant to CP violation and matter-antimatter asymmetry in the universe, and to search for dark energy and ultra-light dark matter.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 2204638
• Report Number(s): JLAB-ACC-22-3802; DOE/OR/23177-7271
• Country of Publication: United States
• Language: English