Microwave absorption by lossy ceramic materials
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 (AlN-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 AlN 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.
- Research Organization:
- Southeastern Universities Research Association, Inc., Newport News, VA (United States). Continuous Electron Beam Accelerator Facility
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 10158849
- Report Number(s):
- DOE/ER/40150--190; CEBAF-PR--92-015; ON: DE92016963
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204
360206
43 PARTICLE ACCELERATORS
430100
665412
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ACCELERATORS
ALUMINIUM NITRIDES
CERAMICS
DESIGN, DEVELOPMENT, AND OPERATION
DIELECTRIC PROPERTIES
ELECTRON BEAMS
MICROWAVE RADIATION
PHYSICAL PROPERTIES
RADIATION EFFECTS
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING DEVICES
THERMAL CONDUCTIVITY