Magnetic field cross section (IMAGE) DOE/Argonne National Laboratory Caption Typical magnetic field variations as mapped by the trolley at different positions in the Muon g-2 experiment's storage ring, shown at the parts-per-million level. Credit (Image by Argonne National Laboratory.) Usage Restrictions None License Licensed 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.