| Title |
A Computational Method for More Accurate Measurements of the Surface Resistance in SRF Cavities |
| Authors |
- J.T. Maniscalco, M. Liepe
Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
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| Abstract |
The principal loss mechanism for superconducting RF cavities in normal operation is Ohmic heating due to the microwave surface resistance in the superconducting surface. The typical method for calculating this field-dependent surface resistance R_{s}(H) from RF measurements of quality factor Q₀ implicitly returns a weighted average of R_{s} over the surface as a function of peak surface magnetic field H, not the true value of R_{s} as a function of the local magnitude of H. In this work we present a computational method to convert a measured Q₀ vs. H_{peak} to a more accurate R_{s} vs. H_{local}, given knowledge about cavity geometry and field distribution.
|
| Paper |
download WEPMF042.PDF [0.184 MB / 3 pages] |
| Export |
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| Conference |
IPAC2018, Vancouver, BC, Canada |
| Series |
International Particle Accelerator Conference (9th) |
| Proceedings |
Link to full IPAC2018 Proccedings |
| Session |
MC7 Poster Session |
| Date |
02-May-18 16:00–17:30 |
| Main Classification |
07 Accelerator Technology |
| Sub Classification |
T07 Superconducting RF |
| Keywords |
cavity, SRF, operation, niobium, radio-frequency |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editors |
Shane Koscielniak (TRIUMF, Vancouver, BC, Canada); Todd Satogata (JLab, Newport News, VA, USA); Volker RW Schaa (GSI, Darmstadt, Germany); Jana Thomson (TRIUMF, Vancouver, BC, Canada) |
| ISBN |
978-3-95450-184-7 |
| Published |
June 2018 |
| Copyright |
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