A Sapphire Loaded TE011 Cavity Design for Superconducting Surface Impedance Measurements
Conference
·
OSTI ID:955166
Most surface analytic instruments can only examine a small sample. To correlate superconducting surface impedance with surface chemistry and morphology, a sapphire rod loaded in the center of a cylindrical niobium cavity with the sample as a demountable disc plate has been developed. Using analytical and 3D simulation tools, the cavityzs geometry, coupling, dielectric and radiation loss can be optimized. For example, a cavity operated in the TE011 mode, at ~7 GHz can generate a 12.4 W/T< sup >2< /sup > RF power on a 2 cm diameter disc. The sensitivity of this measurement by combining RF pulsing and calorimetric techniques is also estimated. The details of warm and cryogenic tests of this cavity will be presented in this paper.
- Research Organization:
- Thomas Jefferson Lab National Accelerator Facility
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 955166
- Report Number(s):
- JLAB-ACC-03-70
- Country of Publication:
- United States
- Language:
- English
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