Introduction of a DC Bias into a High-Q Superconducting Microwave Cavity
- Resource Type
- Working Paper
- Authors
- Chen, Fei; Sirois, A. J.; Simmonds, R. W.; Rimberg, A. J.
- Source
- Appl. Phys. Lett. 98, 132509 (2011)
- Subject
- Condensed Matter - Superconductivity
- Language
We report a technique for applying a dc voltage or current bias to the center conductor of a high-quality factor superconducting microwave cavity without significantly disturbing selected cavity modes. This is accomplished by incorporating dc bias lines into the cavity at specific locations. The measured S-matrix parameters of the system are in good agreement with theoretical predictions and simulations. We find that at 4 K the quality factor of the cavity degrades by less than 1% under the application of a dc bias.
Comment: Submitted to Appl. Phys. Lett