The thermal and electrical conductivities of the normal matrix of LTS wires have a remarkable influence on the wire stability. In particular, in Nb3Sn wires, a bronze matrix in the region of the superconducting filaments may act as a thermal and electrical barrier between the filaments and the copper matrix. This phenomenon is analyzed here through a numerical model accounting for these thermal and electrical transverse resistances. The model is applied to a parametric analysis of the effect of the main properties of the wire matrix on the quench energy and velocity. A 2D analysis of the wire cross section is applied to investigate how a configuration change could improve the wire stability.
M. Breschi, L. Trevisani, L. Bottura, A. Devred, F. Trillaud (2009). Effects of the Nb3Sn Wire Cross Section Configuration on the Thermal Stability Performance. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 19 (2), 2432-2436 [10.1109/TASC.2009.2017875].
Effects of the Nb3Sn Wire Cross Section Configuration on the Thermal Stability Performance
BRESCHI, MARCO;TREVISANI, LUCA;
2009
Abstract
The thermal and electrical conductivities of the normal matrix of LTS wires have a remarkable influence on the wire stability. In particular, in Nb3Sn wires, a bronze matrix in the region of the superconducting filaments may act as a thermal and electrical barrier between the filaments and the copper matrix. This phenomenon is analyzed here through a numerical model accounting for these thermal and electrical transverse resistances. The model is applied to a parametric analysis of the effect of the main properties of the wire matrix on the quench energy and velocity. A 2D analysis of the wire cross section is applied to investigate how a configuration change could improve the wire stability.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
