The absorption investigation in CVD-diamond plates and windows at 50-200 GHz

摘要

Absorption investigations into a number of CVD-diamond plates, as well as absorption investigations into the output windows of megawatt gyrotrons in the range of frequencies 50-200 GHz have been carried out. Significant additional surface absorption was found and its influence was defined. The theory for measurement of this additional absorption was developed. The possible mechanism of microwave absorption in CVD-diamond is briefly discussed.