Design of the mm-wave system of the ITER ECRH upper launcher

• Published in: Fusion engineering and design Vol. 74; no. 1; pp. 431 - 435
• Main Authors: Verhoeven, A.G.A., Bongers, W.A., Bruschi, A., Cirant, S., Elzendoorn, B.S.Q., Gantenbein, G., Graswinckel, M.F., Heidinger, R., Kasparek, W., Kruyt, O.G., Lamers, B., Piosczyk, B., Plaum, B., Ronden, D.M.S., Saibene, G., Stuivinga, M., Zohm, H.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.11.2005; New York, NY Elsevier Science
• Subjects: Antennae; Applied sciences; Controled nuclear fusion plants; ECRH; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Installations for energy generation and conversion: thermal and electrical energy; Launchers; mm-Wave technology; Plasma physics; RF heating; Plasma physics; ECRH; Antennae; RF heating; Launchers; mm-Wave technology; Tokamak; Plasma; Nuclear fusion reactor; Electron cyclotron wave; Stabilization system; ECR heating
• ISSN: 0920-3796; 1873-7196
• DOI: 10.1016/j.fusengdes.2005.06.340

The design work for the ITER ECRH remote-steering upper-port launcher is described. The goal of the system is the stabilization of neoclassical tearing modes (NTMs). The required scanning range in the plasma (more than 20°) is achieved remotely, far away from the hostile plasma environment. This is done behind a diamond window in a separate vacuum environment. Scanning of the beam is done by a mirror that both rotates and translates to steer the beam in the proper way through the window and an isolation valve into a square corrugated waveguide. At the output of this 4.4 m long waveguide, the beam comes out at the same angle and is reflected by a fixed front mirror into the plasma [A.G.A. Verhoeven, et al., The ITER remote-steering ECW upper-port launcher, in: N. Hiromoto (Ed.), The 28th International Conference on Infrared and MM Waves, Otsu, Japan, September 29–October 3, 2003 (JSAP Catalog No. 031231)].