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Title

Quench development and propagation in metal/MgB2 conductors

AuthorsMartínez, Elena CSIC; Lera, F. CSIC ORCID; Martínez-López, M.; Yang, Y.; Schlachter, S. I.; Lezza, P.; Kováč, P.
Issue DateDec-2005
PublisherInstitute of Physics Publishing
CitationSuperconductor Science and Technology 19(1): 143-150 (2006)
AbstractThe thermal stability of different Fe- and Ni-sheathed MgB2 conductors has been studied experimentally and numerically, focusing on the estimation of the quench propagation velocities, vp, minimum quench energies (MQEs) and minimum propagating zones (MPZs). The measurements have been done at self-field and under adiabatic conditions, at variable temperatures and transport currents. Energy pulses were deposited to the conductor by passing rectangular current pulses through a graphite-based epoxy heater. The measured voltage around the heater together with numerical simulation allows the estimation of the minimum propagating zone. Moreover, vp was obtained by measuring multiple voltage taps and thermocouples attached along the conductor. The effect of the current sharing temperatures, Ic(T), of the superconductor, and thermal and electrical properties of the metal sheath have been analysed. The experimental results are in qualitative agreement with the simulated ones, obtained by solving the one-dimensional heat balance equation of the system.
Description8 pages, 9 figures, 1 table.
Publisher version (URL)http://dx.doi.org/10.1088/0953-2048/19/1/024
URIhttp://hdl.handle.net/10261/19553
DOI10.1088/0953-2048/19/1/024
ISSN0953-2048
Appears in Collections:(ICMA) Artículos

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