The search for the cosmological cold dark matter axion – A new refined narrow mass window and detection scheme

Abstract Based on our previous cold dark matter axion mass proposal and a detection scheme, as well as considering the axion mass ranges suggested by persuasive simulations in recent years, we present in this study a revised non-relativistic axion/ALP search strategy and a pinpoint mass value based upon our calculations, concentrating on a slightly narrower axion mass (and corresponding Compton frequency) window. The suggested mass value and the corresponding frequency, based upon the outcome of calculations presented here, reinforce the earlier mass window and the results (slightly different values from our calculations but within the same window) obtained by the calculations and simulations by Kawasaki et al. and Buschmann et al. The mass window comprises the spectral region of 18.99–19.01 GHz (which falls within the Ku microwave band), with a center frequency of 19.00 GHz (±0.1 GHz), equivalent to an axion mass range of 78.6–79.6 μeV, and a center mass at 78.582 (±5.0) μeV, our suggested most likely value for an axionic/ALP field mass, if these fields exist in nature. Our search strategy, as summarized herewith, is based upon the assumption that the dark matter that exists in the current epoch of our physical universe is dominated by axions and thus the local observable axion density is the density of the light cold dark matter, permeating our local neighborhood (mainly in the Milky Way galactic halo). Some ideas and the design of an experiment, based on the inverse Primakoff effect , and built around a Josephson Parametric Amplifier and Resonant Tunneling Diode combination installed in a resonant RF cavity, are possibly some other useful ideas, as introduced in this study.