Carbon graphite reflector antennas for submm-wave diagnostics of plasmas in fusion facilities

The advancement of research in controlled fusion calls for continuous improvement in the methods of high-temperature plasma diagnostics. Among most modern techniques we should mention contactless methods of diagnostics in mm-wave, submm-wave and optical bands that provide a possibility of choosing the narrow electromagnetic wave spectrum needed for the purposes of experiment. SubMM-wave interferometry, polarimetry, scattering and also electron cyclotron radiation detection are successfully applied in all magnetic plasma confinement devices.The antenna material must be sufficiently resistant to heat, plasma and hard radiation flows which may cause degradation of not only physic-mechanical properties of antennas but plasma parameters, too, due to impurity ejection into the confinement volume. In view of this, we have considered a possibility of applying in any large fusion facility the reflector antennas manufactured of the same carbon-graphite materials (CGM) that are generally employed to protect the first wall, as an alternative to metallic antennas