Antimatter Trapped (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Like ordinary hydrogen, a single electron orbiting a proton nucleus, antihydrogen is the simplest of atoms, a single positron (antielectron) orbiting a single antiproton. CERN's ALPHA experiment was first to trap antihydrogen in a magnetic bottle, using a superconducting octupole magnet. Credit Images by Chukman So, copyright © 2011 Wurtele Research Group. All rights reserved. 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.