Quench studies on a layer-wound Bi2Sr2CaCu 2Ox/AgX coil at 4.2 K

U. P. Trociewitz; B. Czabaj; S. Hong; Y. Huang; D. C. Knoll; D. C. Larbalestier; W. D. Markiewicz; H. Miao; M. Meinesz; X. Wang; J. Schwartz

doi:10.1088/0953-2048/21/2/025015

Quench studies on a layer-wound Bi₂Sr₂CaCu ₂O_x/AgX coil at 4.2 K

U. P. Trociewitz, B. Czabaj, S. Hong, Y. Huang, D. C. Knoll, D. C. Larbalestier, W. D. Markiewicz, H. Miao, M. Meinesz, X. Wang, J. Schwartz

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Abstract

To evaluate the controlled quench behavior of high temperature superconducting (HTS) coils, particularly when using HTS coils in a hybrid configuration as an insert in a low temperature superconducting magnet, a layer-wound solenoid using Bi₂Sr₂CaCu₂O wire was instrumented with several strip heaters to generate quenches in the axial and azimuthal directions. An array of distributed voltage taps and thermocouples were used to monitor the quench signals. Minimum quench energies (MQE) and quench propagation velocities (NZPVs) were determined. Results show that quench energies were moderate. NZPVs were slow but quench reaction times were of the same order as reaction times obtained at low quench energy densities in Nb ₃Sn coils.

Original language	English (US)
Article number	025015
Journal	Superconductor Science and Technology
Volume	21
Issue number	2
DOIs	https://doi.org/10.1088/0953-2048/21/2/025015
State	Published - Feb 1 2008

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/21/2/025015

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title = "Quench studies on a layer-wound Bi2Sr2CaCu 2Ox/AgX coil at 4.2 K",

abstract = "To evaluate the controlled quench behavior of high temperature superconducting (HTS) coils, particularly when using HTS coils in a hybrid configuration as an insert in a low temperature superconducting magnet, a layer-wound solenoid using Bi2Sr2CaCu2O wire was instrumented with several strip heaters to generate quenches in the axial and azimuthal directions. An array of distributed voltage taps and thermocouples were used to monitor the quench signals. Minimum quench energies (MQE) and quench propagation velocities (NZPVs) were determined. Results show that quench energies were moderate. NZPVs were slow but quench reaction times were of the same order as reaction times obtained at low quench energy densities in Nb 3Sn coils.",

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T1 - Quench studies on a layer-wound Bi2Sr2CaCu 2Ox/AgX coil at 4.2 K

AU - Trociewitz, U. P.

AU - Czabaj, B.

AU - Hong, S.

AU - Huang, Y.

AU - Knoll, D. C.

AU - Larbalestier, D. C.

AU - Markiewicz, W. D.

AU - Miao, H.

AU - Meinesz, M.

AU - Wang, X.

AU - Schwartz, J.

PY - 2008/2/1

Y1 - 2008/2/1

N2 - To evaluate the controlled quench behavior of high temperature superconducting (HTS) coils, particularly when using HTS coils in a hybrid configuration as an insert in a low temperature superconducting magnet, a layer-wound solenoid using Bi2Sr2CaCu2O wire was instrumented with several strip heaters to generate quenches in the axial and azimuthal directions. An array of distributed voltage taps and thermocouples were used to monitor the quench signals. Minimum quench energies (MQE) and quench propagation velocities (NZPVs) were determined. Results show that quench energies were moderate. NZPVs were slow but quench reaction times were of the same order as reaction times obtained at low quench energy densities in Nb 3Sn coils.

AB - To evaluate the controlled quench behavior of high temperature superconducting (HTS) coils, particularly when using HTS coils in a hybrid configuration as an insert in a low temperature superconducting magnet, a layer-wound solenoid using Bi2Sr2CaCu2O wire was instrumented with several strip heaters to generate quenches in the axial and azimuthal directions. An array of distributed voltage taps and thermocouples were used to monitor the quench signals. Minimum quench energies (MQE) and quench propagation velocities (NZPVs) were determined. Results show that quench energies were moderate. NZPVs were slow but quench reaction times were of the same order as reaction times obtained at low quench energy densities in Nb 3Sn coils.

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Quench studies on a layer-wound Bi₂Sr₂CaCu ₂O_x/AgX coil at 4.2 K

Abstract

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