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Microwave Absorption by Lossy Ceramic Materials*

Published online by Cambridge University Press:  25 February 2011

Isidoro E. Campisi ,
Lynda K. Summers ,
Keith E. Finger  and
Anne M. Johnson
Isidoro E. Campisi
Affiliation:
Continuous Electron Beam Accelerator Facility 12000 Jefferson Avenue Newport News, VA 23606
Lynda K. Summers
Affiliation:
Continuous Electron Beam Accelerator Facility 12000 Jefferson Avenue Newport News, VA 23606
Keith E. Finger
Affiliation:
Continuous Electron Beam Accelerator Facility 12000 Jefferson Avenue Newport News, VA 23606
Anne M. Johnson
Affiliation:
Continuous Electron Beam Accelerator Facility 12000 Jefferson Avenue Newport News, VA 23606
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Abstract

Microwave energy generated by the electron beam in the superconducting cavities of the Continuous Electron Beam Accelerator Facility (CEBAF) is absorbed by special loads fabricated with a novel lossy ceramic material (AIN-glassy carbon) developed especially for this application. Strict environmental constraints (ultra-high vacuum compatibility, operation at 2 K, brazeability, etc.) are imposed on the materials which can be used. Several other ceramics were sintered with AIN and various minority conductive powders to obtain the desired electrical properties according to the ‘artificial dielectric’ model. Dielectric permittivity data and results of low temperature measurements are reported.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 269: Symposium L – Microwave Processing of Materials III , 1992 , 157
Copyright
Copyright © Materials Research Society 1992

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Footnotes

*

This work was supported by the U.S. Department of Energy under contract DE-AC05-84ER40150

References

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