Speaker
Description
The neutron electric dipole moment (nEDM) is sensitive probe of physics beyond the Standard Model of Particle Physics. The TUCAN collaboration targets a 1$\sigma$ uncertainty of $10^{-27}$ e·cm. Reaching this level of precision requires a well-controlled magnetic environment, in particular a stable and spatially uniform magnetic holding field $B_0$ for UCN spin precession. A self-shielded $B_0$ coil is being developed to produce a vertical magnetic field of 1 $\mu$T within the UCN precession volume. The self-shielded design is intended to reduce magnetic leakage and coupling to the surrounding magnetically shielded room (MSR), thereby limiting additional magnetization of the shield and improving the reproducibility of the magnetic environment. The target field uniformity is better than $10^{-4}$ over the precession volume, with temporal drifts below 1~pT over 100 s.
I will present the construction status for the $B_0$ coil, including optimization of its geometry and mechanical alignment.