Next Steps in the Search for Non-Interacting Particles Experimental Hunt (SNIPE Hunt)

The Earth can act as a transducer for ultralight dark-matter detection: hidden-photon or axion-like particle (ALP) dark matter can induce a coherent global magnetic field pattern [1-3]. We discuss the next generation of the Search for Non-Interacting Particles Experimental Hunt (SNIPE Hunt), a search for oscillating magnetic signals due to ultralight bosonic dark matter. We use a network of atomic magnetometers located in relatively quiet magnetic environments, namely in the wilderness far from human-generated magnetic noise. The next generation of the SNIPE Hunt targets higher frequencies (in the 5 Hz to 1 kHz range) and will employ induction-coil magnetometers. In order to clearly interpret the data without detailed modeling of complicated features of the Earth's ionosphere, we propose to measure the curl of the magnetic field at each site.