Figure 2 (IMAGE) Institute for Basic Science Caption Interaction among halo axions around us (a), magnetic field (B0), and photon (γ). γ is the observable in the experiment and corresponds to the axion signal. The cylinder denotes a microwave resonant cavity. Credit Institute for Basic Science Usage Restrictions Attribution Required License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.