Cosmic Axion Spin Precession Experiment (CASPEr)

Understand

We propose an experiment to search for QCD axion and axion-like-particle (ALP) dark matter.

• Nuclei that are interacting with the background axion dark matter acquire time-varying CP-odd nuclear moments such as an electric dipole moment.
• In analogy with nuclear magnetic resonance, these moments cause precession of nuclear spins in a material sample in the presence of an electric field.
• Precision magnetometry can be used to search for such precession.