2015: Focus: Ultracold Neutrons Measure Magnetic Field

October 16, 2015, Physics 8, 100




A new technique borrows a trick from MRI scanners to make precise magnetic measurements with ultracold neutrons. A new technique measures the range of energies in a cloud of ultracold neutrons and also detects variations in the magnetic field applied to the cloud with an unprecedented degree of sensitivity. The method uses a trick borrowed from medical imaging and could significantly benefit experiments searching for a neutron electric dipole moment, which in turn could reveal why there is an imbalance between matter and antimatter.