The ITER ECH&CD system will have an installed power of 24 MW at 170 GHz delivered to the launchers at the plasma side through a transmission line sub-system constituted by evacuated HEn waveguides, DC breaks, power monitors, mitre bends, polarizers, switches, loads and pumping sections. Each line will be typically about 160 m in length and will connect the RF power sources alternatively to the equatorial launcher or to one of the upper launchers in order to accomplish the various physics requirements: heating, current drive and instability control. Two different source configurations are at the moment under study, pending the final decision about the European 2 MW coaxial gyrotron development. Each configuration will imply a dedicated transmission line layout. An overview of the actual design is presented and the technical requirements are discussed.
ITER Organization, St.Paul-lez-Durance, 13067 France Fusion for Energy, C/JosepPla 2, Torres Diagonal Litoral-B3,E-08019 Barcelona,Spain US ITER Project Office, ORNL, 055 Commerce Park, PO Box 2008, Oak Ridge, TN 37831, USA Institute of Applied Physics, 46 Ulyanov Street, Nizhny Novgorod, 603950 Russia Japan Atomic Energy Agency (JAEA) 801-1 Mukoyama, Naka-shi, Ibaraki 311-0193 Japan Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar, 382428, India Association EURATOM-FOM, 3430 BE Nieuwegein, The Netherlands MIT Plasma Science and Fusion Center, Cambridge, MA 02139, USA