Enhancement in Quality Factor of SRF Niobium Cavities by Material Diffusion
arXiv:1408.6245 · doi:10.1109/TASC.2014.2359640
Abstract
An increase in the quality factor of superconducting radiofrequency cavities is achieved by minimizing the surface resistance during processing steps. The surface resistance is the sum of temperature independent residual resistance and temperature/material dependent Bardeen-Cooper-Schrieffer (BCS) resistance. High temperature heat treatment usually reduces the impurities concentration from the bulk niobium, lowering the residual resistance. The BCS part can be reduced by selectively doping non-magnetic impurities. The increase in quality factor, termed as Q-rise, was observed in cavities when titanium or nitrogen thermally diffused in the inner cavity surface.
Manuscripts submitted to the Special Issue of the IEEE Transactions on Applied Superconductivity
References in corpus (3)
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- Effect of high temperature heat treatments on the quality factor of a large-grain superconducting radio-frequency niobium cavity
- Reply to "Comment on the 'Decrease of the surface resistance in superconducting niobium resonator cavities by the microwave field'"
Cited by in corpus (6)
- Modern and Future Colliders
- Effect of Low Temperature Baking in Nitrogen on the Performance of a Niobium Superconducting Radio Frequency Cavity
- On the quest of low temperature nitrogen infusion relevant for superconducting Nb based radio-frequency cavities
- Revealing the role of nitrogen on hydride nucleation and stability in pure niobium using first principles calculations
- Role of Thermal Resistance on the Performance of Superconducting Radio Frequency Cavities
- Microscopic Examination of SRF-quality Nb Films through Local Nonlinear Microwave Response