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TUP040 |
Quench Dynamics in SRF Cavities | |
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Funding: The work herein has been performed at Fermilab, which is operated by Fermi Research Alliance, LLC under Contract with the United States Department of Energy. A quench in SRF cavities is a thermal runaway process that causes a rapid loss of the stored RF energy. A quench is one of the factors that limits performance of the cavity. We have developed a comprehensive model describing the thermal and electromagnetic dynamics in the quench zone of an SRF cavity. The model has already provided us with insights essential to improved performance of SRF cavities. The predicted size of the hot spot that emits 2nd-sound during the quench is important for the Oscillating Sound Transducer (OST) quench detection technique; the maximum size of the normal zone formed during the quench determines cavity quality degradation; anomalous RF decay time distinguishes a real quench from other mechanisms of sudden loss of RF power in the cavities. We describe the model, discuss the most important results and compare them to experimental data. |
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