Regensburg 2016 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 6: Focus Session: Applications of Dielectric Materials in Microwave Technology

DF 6.1: Topical Talk

Montag, 7. März 2016, 15:00–15:30, H26

CVD diamond for nuclear fusion experiments — •Eckhard Wörner and Christoph Wild — Diamond Materials GmbH, Freiburg, Germany

Its outstanding physical properties make diamond an ideal material for demanding optical and thermal applications and the possibility to grow diamond by Chemical Vapor Deposition (CVD) finally makes it available for industrial use.

While it's common knowledge that diamond is the hardest material only few people know that it is also the material with the highest thermal conductivity, Debye Temperature and atomic density. In addition it's chemically inert, consists of lightweight strongly bound carbon atoms and is optical transparent from the ultraviolet to the far infrared. So it should come as no surprise that fusion experiments take advantage of its unique properties. Inertial confinement fusion uses hollow diamond spheres as capsules to be filled with deuterium and tritium whereas magnetic confinement fusion uses diamond windows to seal the torus from ambient atmosphere while being transparent for ultra-high power microwave radiation.

Diamond Materials GmbH, a Fraunhofer Spin-Off founded about 10 years ago, is one of the leading companies in the world that can grow large area optical grade CVD diamond. In our presentation we will describe growth and processing and focus on the preparation of diamond windows and spheres for nuclear fusion experiments.