| Title |
Nature of Quality Factor Degradation in SRF Cavities due to Quench |
| Authors |
- M. Checchin
Fermilab, Batavia, Illinois, USA
|
| Abstract |
Superconductive quench is a well-known phenomenon that causes magnetic flux trapping in superconducting accelerating cavities increasing the radio-frequency surface resistance. This paper is addressed to the understanding of the quench-induced losses nature. We present the proof that the real origin of quench-related quality factor degradation is consequence only of ambient magnetic field trapped at the quench spot. Also, we show how the quality factor can be fully recovered after it was highly deteriorated quenching several times in presence of external magnetic field. Such phenomenon was found to be completely reliable up to certain values of applied magnetic field, above that the cavity quality factor cannot be fully recovered anymore.
|
| Paper |
download MOBA05.PDF [1.280 MB / 7 pages] |
| Slides |
download MOBA05_TALK.PDF [2.747 MB] |
| Conference |
SRF2015, Whistler, BC, Canada |
| Series |
International Conference on RF Superconductivity (17th) |
| Proceedings |
Link to full SRF2015 Proccedings |
| Session |
Fundamentals I - High-Q |
| Date |
14-Sep-15 10:40–12:50 |
| Main Classification |
Fundamental SRF R&D - Bulk Nb |
| Keywords |
cavity, superconductivity, simulation, electron, cryogenics |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Robert E. Laxdal (TRIUMF, Vancouver, BC, Canada); Jana Thomson (TRIUMF, Vancouver, BC, Canada); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-178-6 |
| Published |
December 2015 |
| Copyright |
|
