Measurements of ohmic losses of metallic reflectors at 140 GHz using a 3-mirror resonator technique

被引：39

作者：

Kasparek, W

Fernandez, A

Hollmann, F

Wacker, R

机构：

[1] Univ Stuttgart, Inst Plasmaforsch, D-70569 Stuttgart, Germany

[2] Asociat EURATOM, CIEMAT Fus, Madrid 28040, Spain

来源：

INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES | 2001年 / 22卷 / 11期

关键词：

Electron cyclotron resonance - Graphite - Gyrotrons - Millimeter waves - Optical resonators - Stainless steel - Surface structure - Thermonuclear reactions;

D O I：

10.1023/A:1015064616703

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The reflectivity of metallic mirrors in the millimeter wave region does not only depend on the material, but also on the structure and roughness of the surface. We have performed measurements of the reflectivity of various plane and grooved metallic and graphite samples at 140 GHz. The technique is based on the comparison of the quality factor of a 2-mirror reference resonator with the quality factor of a 3-mirror resonator which has identical dimensions and includes the mirror to be tested. After a brief presentation of the theory, the set-up is described and the reflection loss for various aluminium and copper mirrors as well as vacuum compatible materials for applications in thermonuclear fusion experiments are presented and discussed.

引用

页码：1695 / 1707

页数：13

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