Performance check of cell with newly designed electrode for $^{129}$Xe EDM measurement

A permanent electric dipole moment (EDM) can be detected as a difference between the spin precession frequencies measured with an electric field applied parallel and antiparallel to a magnetic field. We aim to make a measurement of the $^{129}$Xe EDM at a level of d$\sim$10$^{-28}$ ecm by using a nuclear spin maser. The amplitude of the maser signal is proportional to the nuclear spin polarization. The polarization of $^{3}$He that acts as a co-magnetometer, is sensitive to the interactions with the electrodes used to generate the electric field. Previously, we used a transparent electrode made of ITO (Indium Tin Oxide) to allow transmission linearly polarized laser light into the cell. However, $^{3}$He polarization in a cell with such electrodes was measured to be $\sim$ 0.1{\%}, which is ten times smaller than no electrodes. In order to solve the problem, we adopted an electrode made from a mesh of Molybdenum. The geometry also reduces the contact area between $^{3}$He gas and the electrode. We measured $^{3}$He polarization at a cell with the mesh electrode by means of adiabatic fast passage NMR.