| Autor: |
Keijzer, Ruben, Willering, Gerard, Dhalle, Marc, ten Kate, Herman |
| Zdroj: |
IEEE Transactions on Applied Superconductivity; August 2023, Vol. 33 Issue: 5 p1-5, 5p |
| Abstrakt: |
Accelerator magnets employing Nb3Sn Rutherford cables are more susceptible to conductor degradation than Nb-Ti magnets. Recent measurements on a Nb3Sn accelerator magnet have revealed unexpected behaviour such as decaying voltages at constant current plateaus of V-I measurements, inverse ramp rate and temperature dependence of quench currents, and anomalous quench propagation measured by so-called quench antennas. Numerical modelling has shown that these anomalies can be explained by an inhomogeneous degradation in the Rutherford cable, in which a subset of strands is fully or partially degraded. In this paper, we study how this type of degradation can affect the early stages of quench propagation. With the aid of a network model, we show how quench antenna signals can be used to diagnose inhomogeneous conductor degradation in the Rutherford cable. |
| Databáze: |
Supplemental Index |
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