Abstract
We report on the Beam EDM experiment, which aims to employ a pulsed cold neutron beam to search for an electric dipole moment instead of the established use of storable ultracold neutrons. We present a brief overview of the basic measurement concept and the current status of our proof-of-principle Ramsey apparatus.
Highlights
The measurement of the neutron electric dipole moment (EDM) is considered to be one of the most important fundamental physics experiments at low energy
We report on the Beam EDM experiment, which aims to employ a pulsed cold neutron beam to search for an electric dipole moment instead of the established use of storable ultracold neutrons
We present a brief overview of the basic measurement concept and the current status of our proof-of-principle Ramsey apparatus
Summary
The measurement of the neutron electric dipole moment (EDM) is considered to be one of the most important fundamental physics experiments at low energy. The search for a finite neutron EDM remains a top priority It has become a worldwide endeavor which is followed by various research teams setting up experiments for improved measurements [2,3,4,5,6,7,8,9,10]. Historically early neutron EDM experiments have been performed employing neutron beams where the main limiting systematic has so far been the relativistic v × E-effect. This effect arises from the neutron moving at a velocity v through an electric field E sensing an effective magnetic field Bv×E = −(v × E)/c2 according to Maxwell’s equations, with c being the speed of light in vacuum. The technique relies on the fact that one can distinguish between the effect due to a neutron EDM and the v × E-effect by performing a time-of-flight Ramsey measurement
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