Measuring Antihydrogen (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption At top, a cutaway schematic of the ALPHA antimatter trap shows the superconducting octupole magnet and mirror magnets and other features. Below is a map of magnetic field strength inside the trap. The goal is to measure the hyperfine structure of antihydrogen atoms at the trap's center, where the magnetic fields are at minimum strength. Credit ALPHA Collaboration Usage Restrictions With credit as given 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.