Speaker
Wenting Chen
(Paul Scherrer Institut)
Description
The n2EDM experiment at the Paul Scherrer Institut searches for a permanent neutron electric dipole moment. For the purpose of correcting magnetic field fluctuations in its setup, a laser-based $^{199}$Hg co-magnetometer has been developed. The optical pumping of the $^{199}$Hg atoms (I=1/2) with a UV laser leads to the nuclear spin polarization. The laser is also used to extract the spin precession frequency of $^{199}$Hg atoms cohabiting in the same volume as the neutrons.
This talk will present the principle of the $^{199}$Hg co-magnetometer, improvements in laser stabilization, setting up the laser light transport over 20 meters, and a study of the $^{199}$Hg-related systematic effects.
SNF#204118 supported
Authors
Wenting Chen
(Paul Scherrer Institut)
on behalf of the nEDM collaboration
