Title :
The 100 GHz -1000 GHz Waves Scattering by Microcaverns in CVD-Diamond Windows
Author :
Mocheneva, O.S. ; Parshin, V.V.
Author_Institution :
Inst. of Appl. Phys., RAS, Nizhny Novgorod
Abstract :
The calculation results of wave scattering by internal non-homogeneities in real output CVD-diamond windows of megawatt gyrotrons in the 100 GHz-1000 GHz frequency range is presented. We have verified experimental result that up to 170-200 GHz the scattering is negligible, but above 200 GHz makes an appreciable contribution to absorption. The calculations have shown that near 1 THz the scattering becomes fundamental. For examined scatters geometry ~30-40% of total scattered energy scatters forward (to transmission line) and back (to gyrotron), ~70-60% encloses and absorbs in the disk volume. These results allowed formulating the demands to disk quality according to supposed set-up parameters
Keywords :
CVD coatings; diamond; electromagnetic wave absorption; electromagnetic wave scattering; gyrotrons; inhomogeneous media; submillimetre wave tubes; 100 to 1000 GHz; CVD-diamond windows; energy scatters; internal nonhomogeneities; megawatt gyrotrons; microcaverns; terahertz wave absorption; terahertz wave scattering; transmission line; Absorption; Crystallization; Frequency estimation; Gyrotrons; Heating; Impurities; Inductors; Plasma temperature; Power transmission lines; Scattering; CVD-Diamonds; MM and THz waves; scattering;
Conference_Titel :
Ultrawideband and Ultrashort Impulse Signals, The Third International Conference
Conference_Location :
Sevastopol
Print_ISBN :
1-4244-0513-0
DOI :
10.1109/UWBUS.2006.307223
