n2EDM will be a next-generation experiment to measure with unprecedented sensitivity the electric dipole moment (EDM) of the neutron, a fundamental parameter of particle physics that is deeply related to the long-standing cosmological mystery of how the Universe came to be dominated by matter, with almost no antimatter present. Building upon the Sussex group’s longstanding world lead in the field, the apparatus uses nuclear magnetic resonance (NMR) techniques to probe tiny shifts in energy when an electric field is applied. In fact, NMR as it is used today – for example, in hospital magnetic-resonance imaging machines – is a direct result of techniques developed for the very first neutron EDM experiment, in the early 1950s.
PhD students Chris Abel and Nick Ayres in front of the open nEDM magnetic shield.
The n2EDM experiment is being constructed at the Paul Scherrer Institute in Switzerland. You can find out more at www.neutronedm.org.