BASE experiment 02 (IMAGE) Johannes Gutenberg Universitaet Mainz Caption BASE experiment using the CERN antiproton decelerator in Geneva: Shown here are the superconducting magnet that houses the Penning trap and the antiproton transfer beam tube. Credit photo/©: Stefan Sellner, RIKEN Usage Restrictions This image may only be used in connection with the press release "Magnetic moment of a single antiproton determined with greatest precision ever", issued by Johannes Gutenberg University Mainz on January 19, 2017. 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.