Millimeter wave characterisation of large area MPACVD diamond windows

Author

Heidinger, R. ; Meier, A. ; Rohde, M. ; Sporl, R. ; Thumm, M. ; Arnold, A.

Author_Institution

Assoc. FZK-Euratom, Forschungszentrum Karlsruhe GmbH, Germany

fYear

2000

fDate

12-15 Sept. 2000

Firstpage

389

Lastpage

390

Abstract

Millimeter wave reflection measurements and dielectric loss measurements at 90-100 GHz and 145 GHz demonstrate that emerging commercial large area CVD diamond discs for high power gyrotron windows can be typically kept within acceptable margins in disc thickness and dielectric loss. A neutron irradiated disc shows for 10/sup -4/ dpa a reduction of thermal conductivity whereas a substantial degradation in mm-wave properties did not occur.

Keywords

diamond; dielectric losses; elemental semiconductors; gyrotrons; millimetre wave spectra; neutron effects; plasma CVD coatings; thermal conductivity; 145 GHz; 90 to 100 GHz; C; commercial large area CVD diamond discs; dielectric loss; disc thickness; high power gyrotron windows; large area MPACVD diamond windows; millimeter wave characterisation; millimeter wave reflection; neutron irradiated disc; thermal conductivity; Area measurement; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Loss measurement; Millimeter wave measurements; Power measurement; Reflection; Thermal conductivity; Thickness measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2000. Conference Digest. 2000 25th International Conference on

Conference_Location

Beijing, China

Print_ISBN

0-7803-6513-5

Type

conf

DOI

10.1109/ICIMW.2000.893074

Filename

893074