Near-adiabatic quench experiments on short y Ba2 Cu3 O7-δ coated conductors

X. Wang, U. P. Trociewitz, Justin Schwartz

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

Minimum quench energy and normal zone propagation velocity are measured on short Y Ba2 Cu3 O7-δ coated conductors in self-field at temperatures ranging from 40 to 77 K. The sample is cooled via a cryocooler with a cryostat pressure of ∼ 10-4 Pa, creating a nearly adiabatic environment. A normal zone is created by pulsing a heater that is attached to the sample surface with a thin layer of alumina-filled epoxy. The minimum quench energy is determined by identifying the minimum heater energy that creates a propagating normal zone, and the propagation velocity is determined from the time delay between voltage signals in voltage taps distributed along the length of the conductor. It is found that the minimum quench energy is on the order of 1 J and the normal zone propagation velocity ranges from 1-40 mms. These results are compared to similar measurements on other coated conductor architectures and geometries and to the classical adiabatic quench propagation model.

Original languageEnglish (US)
Article number053904
JournalJournal of Applied Physics
Volume101
Issue number5
DOIs
StatePublished - Mar 26 2007

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propagation velocity
conductors
heaters
energy
taps
electric potential
cryostats
time lag
aluminum oxides
propagation
geometry
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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abstract = "Minimum quench energy and normal zone propagation velocity are measured on short Y Ba2 Cu3 O7-δ coated conductors in self-field at temperatures ranging from 40 to 77 K. The sample is cooled via a cryocooler with a cryostat pressure of ∼ 10-4 Pa, creating a nearly adiabatic environment. A normal zone is created by pulsing a heater that is attached to the sample surface with a thin layer of alumina-filled epoxy. The minimum quench energy is determined by identifying the minimum heater energy that creates a propagating normal zone, and the propagation velocity is determined from the time delay between voltage signals in voltage taps distributed along the length of the conductor. It is found that the minimum quench energy is on the order of 1 J and the normal zone propagation velocity ranges from 1-40 mms. These results are compared to similar measurements on other coated conductor architectures and geometries and to the classical adiabatic quench propagation model.",
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Near-adiabatic quench experiments on short y Ba2 Cu3 O7-δ coated conductors. / Wang, X.; Trociewitz, U. P.; Schwartz, Justin.

In: Journal of Applied Physics, Vol. 101, No. 5, 053904, 26.03.2007.

Research output: Contribution to journalArticle

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