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We describe a method for dark matter detection based on the evaporation ofhelium atoms from a cold surface and their subsequent detection using fieldionization. When a dark matter particle scatters off a nucleus of the targetmaterial, elementary excitations (phonons or rotons) are produced. Excitationswhich have an energy greater than the binding energy of helium to the surfacecan result in the evaporation of helium atoms. We propose to detect these atomsby ionizing them in a strong electric field. Because the binding energy ofhelium to surfaces can be below 1~meV, this detection scheme opens up newpossibilities for the detection of dark matter particles in a mass range downto 1~MeV/c$^{2}$.

Dark Matter Detection Using Helium Evaporation and Field Ionization