Development of the high voltage system for a new 129Xe EDM experiment at LANL*

We are developing a new experiment to measure the 129Xe electric dipole moment with 3He comagnetometry. The experiment will measure the precession frequency of 129Xe and 3He spins using SQUIDs in the presence of applied magnetic and electric fields inside a large magnetically shielded room at Los Alamos National Laboratory. We aim to achieve at least an order of magnitude improvement over the current limit through several improvements including: a novel configuration for SQUID placement, a recirculating polarizing system for Xe and He for higher duty factor, and an improved high voltage system. The statistical sensitivity of the experiment is directly proportional to the strength of the applied electric field. We expect to significantly increase the applied electric field by optimizing the Xe-He-N2 gas mixture and improving the electrode design.  In this talk, the current status of the effort to improve the high voltage aspect of the experiment will be discussed.