Title :
Wood´s anomaly in the design of corrugated mirrors for high-power mm-waves
Author :
Holzhauer, E. ; Gantenbein, G. ; Kasparek, W.
Author_Institution :
Inst. fur Plasmaforschung, Stuttgart Univ., Germany
Abstract :
Corrugated mirrors are required to change the polarisation state in mm-wave heating of fusion plasmas. Care must be taken to avoid Wood´s anomaly which reduces the reflected power in the 0/sup th/ order by transferring energy into an unwanted surface wave propagating along the mirror surface. Measurements and numerical calculations of broadband polarisers are reported.
Keywords :
Tokamak devices; fusion reactor design; gyrotrons; millimetre wave generation; plasma radiofrequency heating; Wood´s anomaly; broadband polarisers; corrugated mirrors; fusion plasmas; high-power mm-waves; mirror surface; mm-wave heating; multi-frequency electron cyclotron heating; polarisation state; step-tunable gyrotrons; unwanted surface wave; Frequency measurement; Gratings; Heating; Mirrors; Plasma measurements; Plasma waves; Polarization; Power measurement; Shape; Surface waves;
Conference_Titel :
Infrared and Millimeter Waves, 2002. Conference Digest. Twenty Seventh International Conference on
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-7423-1
DOI :
10.1109/ICIMW.2002.1076223
