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In recent years, dark matter direct detection experiments have spurredinterest in the Migdal effect, where it is employed to extend their sensitivityto lower dark matter masses. Given the lack of observation of the Migdaleffect, the calculation of the signal is subject to large theoreticaluncertainties. It is therefore desirable to attempt a first measurement of theMigdal effect, and to test the theoretical predictions of the Migdal effect forthe calibration of the experimental response to a potential dark matter signal.In this work, we explore the feasibility of observing the Migdal effect inxenon and argon. We carry out proof-of-concept calculations for low-energyneutrons from a filtered source, and using a reactor, the Spallation NeutronSource, or $^{51}$Cr as potential neutrino sources. We perform a detectorsimulation for the xenon target and find that, with available technology, thelow-energy neutron source is the most promising, requiring only a modestneutron flux, detector size, and exposure period.

Observing the Migdal effect from nuclear recoils of neutral particles with liquid xenon and argon detectors