Fermilab's Search for Axions

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© Fermilab.

The GammeV experiment at Fermilab, shown here with two project scientists, is designed to detect axions. The experiment is an opportunistic use of a large magnet—the red rectangular object in the photograph—originally designed to be used in the Tevatron. The GammeV team realized that they could use the magnet to create axions, as it is theoretically possible for a photon from a laser beam in a strong magnetic field to turn into an axion. The scientists shine a green laser down the hollow center of the magnet and look for axions appearing at the other end of the experiment. (Unit: 10)