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

fYear

2006

fDate

Sept. 2006

Firstpage

260

Lastpage

262

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrawideband and Ultrashort Impulse Signals, The Third International Conference

Conference_Location

Sevastopol

Print_ISBN

1-4244-0513-0

Type

conf

DOI

10.1109/UWBUS.2006.307223

Filename

4099281