A dc SQUID operated at the flux sweet spot with lock-in modulation yields an ultra-broadband axion search with projected sensitivity |g_aγγ| ≳ 10^{-16} GeV^{-1} across 15 orders of magnitude in mass.
Progress on the ARI- ADNE axion experiment
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abstract
The Axion Resonant InterAction Detection Experiment (ARIADNE) is a collaborative effort to search for the QCD axion using techniques based on nuclear magnetic resonance. In the experiment, axions or axion-like particles would mediate short-range spin-dependent interactions between a laser-polarized 3He gas and a rotating (unpolarized) tungsten source mass, acting as a tiny, fictitious "magnetic field". The experiment has the potential to probe deep within the theoretically interesting regime for the QCD axion in the mass range of 0.1-10 meV, independently of cosmological assumptions. The experiment relies on a stable rotary mechanism and superconducting magnetic shielding, required to screen the 3He sample from ordinary magnetic noise. Progress on testing the stability of the rotary mechanism is reported, and the design for the superconducting shielding is discussed.
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Piezoelectric materials combined with nuclear spin alignment can source virtual QCD axions with up to 7 orders of magnitude enhanced scalar coupling, allowing resonant detection of the axion via spin precession in the 10^{-5} to 10^{-2} eV range.
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An ultra-broadband axion dark matter experiment
A dc SQUID operated at the flux sweet spot with lock-in modulation yields an ultra-broadband axion search with projected sensitivity |g_aγγ| ≳ 10^{-16} GeV^{-1} across 15 orders of magnitude in mass.
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Detecting the QCD axion via the ferroaxionic force with piezoelectric materials
Piezoelectric materials combined with nuclear spin alignment can source virtual QCD axions with up to 7 orders of magnitude enhanced scalar coupling, allowing resonant detection of the axion via spin precession in the 10^{-5} to 10^{-2} eV range.