Grooved CVD diamond windows: Grooves´ profiles and structural simulations

Author

Vaccaro, A. ; Aiello, G. ; Meier, A. ; Scherer, T. ; Schreck, S. ; Spaeh, P. ; Strauss, D. ; Stober, J. ; Wagner, D. ; de Wit, H.G.M.

Author_Institution

Inst. fur Angewandte Mater. IAM-AWP, Assoc. EURATOM-KIT, Karlsruhe, Germany

fYear

2011

fDate

2-7 Oct. 2011

Firstpage

1

Lastpage

2

Abstract

CVD diamond is a well known excellent low loss material (tan δ ≤ 10^-5) for microwave transmission e.g. in fusion reactors for the ECRH&CD system. Laser processing of diamond discs allows the artificial formation of grooves on diamond disc surfaces. A potential application is the design of windows with a surface finish offering an increased bandwidth. As grooves with sharp edges and corners might lead to local stress accumulation beyond tolerable limits, the method has been checked by FEM analyses. The results are here summarized.

Keywords

chemical vapour deposition; diamond; finite element analysis; laser materials processing; microwave materials; surface finishing; C; ECRH&CD system; FEM analyses; diamond disc surfaces; grooved CVD diamond windows; laser processing; low loss material; microwave transmission material; Diamond-like carbon; Geometry; Load modeling; Masers; Stress; Surface treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on

Conference_Location

Houston, TX

ISSN

2162-2027

Print_ISBN

978-1-4577-0510-6

Electronic_ISBN

2162-2027

Type

conf

DOI

10.1109/irmmw-THz.2011.6105093

Filename

6105093