Muon g-2 (pronounced gee minus two) will use Fermilab's powerful accelerators to explore the interactions of short-lived particles known as muons with a strong magnetic field in "empty" space. Scientists know that even in a vacuum, space is never empty. Instead, it is filled with an invisible sea of virtual particles that—in accordance with the laws of quantum physics—pop in and out of existence for incredibly short moments of time. Scientists can test the presence and nature of these virtual particles with particle beams traveling in a magnetic field.
With the MC-1 building complete, the 50 foot wide Muon g-2 electromagnet arrived at its new permanent home at Fermilab in July 2014. The Muon g-2 team is currently completing reassembly of all the magnet components. Soon, the coils will be cooled to near absolute zero with liquid helium so that the superconducting magnet can undergo tests and commissioning.