Artificial Dielectric Ceramics for CEBAF's Higher-Order-Mode Loads
The superconducting cavities of the Continuous Electron Beam Accelerator Facility (CEBAF) include 676 special loads fabricated with a new lossy ceramic material (AIN- glassy carbon) developed especially for CEBAF. The absorption of Higher-Order-Modes (HOM) RF power generated by the beam occurs inside the cavity vacuum at 2K. The cavity environment imposes strict conditions on the usable materials and the fabrication techniques. The absorbing material developed (based on the artificial dielectric model) is a ceramic with excellent vacuum, structural and thermal properties and has a complex permitivity independent of temperature between 1.5 and 700 K, making it an ideal material for superconducting cavity applications.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 791940
- Report Number(s):
- CEBAF-PR-93-064; DOE/ER/40150-2014
- Country of Publication:
- United States
- Language:
- English
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