Title :
Adiabatic normal zone development in MgB2 Superconductors
Author :
van Weeren, H. ; van den Eijnden, N.C. ; Wessel, W.A.J. ; Lezza, P. ; Schlachter, S.I. ; Goldacker, W. ; Dhallé, M. ; Ouden, A. Den ; Haken, Bt. ; Kate, H.H.Jt.
Author_Institution :
Univ. of Twente, Enschede, Netherlands
fDate :
6/1/2005 12:00:00 AM
Abstract :
A-priori knowledge of the normal zone development in MgB2 conductors is essential for quench protection of applications. Therefore the normal zone propagation in a monofilament MgB2/Fe conductor under near-adiabatic conditions at 4.2 K has been measured and simulated. The results show normal zone propagation velocities up to several meters per second. In addition, by including the voltage-current relation into the computational model, the influence of the n-value on the normal zone propagation is determined. The simulations show that lower n-values suppress the normal zone propagation velocity due to lower heat generation in the MgB2 filaments.
Keywords :
heating; magnesium compounds; superconducting materials; MgB2; MgB2 superconductor; adiabatic normal zone development; heat generation; monofilament MgB2-Fe conductor; normal zone propagation velocity; quench protection; voltage-current relation; Computational modeling; Conducting materials; Conductors; Cooling; Copper; High temperature superconductors; Performance evaluation; Protection; Superconductivity; Voltage; normal zone propagation;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849227
