A Tunable Sheared Elliptical Solenoid for Precision Neutron Beam Experiments

Because of~?the~neutron's neutrality, many fundamental symmetries experiments instead exploit its magnetic moment and use~precise magnetic fields to manipulate neutron beams. One implementation requirement of experimental searches for beyond Standard Model sterile (mirror) neutron oscillations is a \textasciitilde \textbar 10\textbar G magnetic field, tunable to arbitrary directions, and maintaining a uniformity to \textasciitilde \textbar 2\textbar mG.~ I will present a symmetric design involving a series of three sheared elliptical solenoids layered and rotated by 2$\pi $/3 with respect to each other, which can produce both uniform solenoidal and transverse magnetic fields.~ The three coils can be tuned not only to produce an arbitrary field in any direction, but also to~actively compensate for small variations in background fields along the beam axis. These nonstandard wire geometries have been fully realized using 3D printing technology.