Real-Time Feed-backed Anode Power Supply for 170GHz gyrotron in KSTAR Bong-Jun Seok, Il-kun Ahn, Seung-kyo Lee, Eun-yong Shim, Young-soon Bae, Mi Joung and Jin-Hyun Joung EPJ Web of Conferences, 87 (2015) 02014 Published online: 12 March 2015 DOI: 10.1051/epjconf/20158702014