Fusion Energy Field Lines (image) University of Washington Caption Alternating the current through the handles produce asymmetric magnetic fields, shown here, which act to contain the plasma. Credit T. Jarboe, Univ. of Washington Usage Restrictions With credit 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.