Auxiliary Coils for Wendelstein 7-X (IMAGE) Helmholtz Association Caption The outer vessel of Wendelstein 7-X equipped with a variety of ports. Blue: five auxiliary coils, which are provided by Princeton Plasma Physics Laboratory. They are to help precise setting of the magnetic fields at the plasma edge. Credit (Graphic: IPP) 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.