Neutron Electric Dipole Moment Workshop 2026

Session

Coffee

Not scheduled

Mattli Antoniushaus, Morschach

5. Development of a novel UCN polariser based on Halbach arrays

Luca Kaess

Poster

Polarising beams of ultracold neutrons (UCN) is crucial for many precision experiments, e.g., the measurement of the neutron electric dipole moment or the beta decay asymmetry. Modern polarisers usually rely on the longitudinal Stern-Gerlach effect, where strong (superconducting) magnets create fields of several tesla, effectively repelling the undesired spin state and only transmitting the...

44. Fabrication and Neutron Characterization of Ultrathin Formvar Separation Foils

Xuefen Han (Technical University of Munich)

Poster

A separation foil is a crucial component in superthermal ultracold neutron (UCN) sources. Its primary function is to prevent contamination from external gases. Formvar, owing to its ability to form extremely thin and mechanically stable films, enables UCN to pass via quantum tunneling and thus represents a promising candidate for next-generation separation foils.

In this work, Formvar foils...

34. Probing Temperature-Dependent Upscattering of Ultracold Neutrons in Superfluid Helium at the SuperSUN UCN Source

Riley Kibbee (University of Illinois, Urbana-Champaign)

Poster

SuperSUN is a superthermal source for ultracold neutrons (UCNs) located at the Institut Laue-Langevin (ILL). Designed to have a saturation of 4E6 UCNs in the convertor volume, or a UCN density of 282/cc. It has reached operation within 3% of this goal with plans to increase this design value to 2E7 (1408/cc) with polarized neutrons using a magnetic octupole reflector. In this poster, we...