We report results of a new technique to measure the electric dipole moment of ¹²⁹Xe with ³He comagnetometry. Both species are polarized using spin-exchange optical pumping, transferred to a measurement cell, and transported into a magnetically shielded room, where SQUID magnetometers detect free precession in applied electric and magnetic fields. The result from a one-week measurement campaign in 2017 and a 2.5 week campaign in 2018, combined with detailed study of systematic effects, is d_A(¹²⁹Xe)=(1.4±6.6_stat±2.0_syst)×10⁻²⁸ ecm. This corresponds to an upper limit of |d_A(¹²⁹Xe)|<1.4×10⁻²⁷ecm (95% CL), a factor of five more sensitive than the limit set in 2001.

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https://uky.zoom.us/rec/share/Yq1ukIAKVm-vzjmtvFddtR96oI-_LIq2cP1YSl99R…