EFFECTS OF AN INSULATION LAYER ON THE PROPAGATION OF A NORMAL ZONE IN SUPERCONDUCTING WIRES BELOW 4. 2 K.

K. Funaki; Y. Takata; M. Takeo; F. Irie; U. Ruppert; W. Z. Yang; E. Kristen; K. Lueders; G. Klipping

EFFECTS OF AN INSULATION LAYER ON THE PROPAGATION OF A NORMAL ZONE IN SUPERCONDUCTING WIRES BELOW 4. 2 K.

K. Funaki, Y. Takata, M. Takeo, F. Irie, U. Ruppert, W. Z. Yang, E. Kristen, K. Lueders, G. Klipping

Thermal Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

The propagation velocity of a normal zone in NbTi multi-filamentary superconducting wires has been measured in the bath temperature range of 2. 05-4. 2 K. Bare and insulated wires were utilized for the experiment in order to examine the effect of an insulation layer. For the bare wire the propagation velocity decreases gradually with decreasing temperature, then drastic reduction was observed near the lambda point, and finally no propagation occurs in pressurized He II. For the insulated wire, on the other hand, the velocity is three times larger than that for the bare wire at 4. 2 K and the propagation was observed even in He II. Numerical analysis was performed for the insulated wire. The results agree quantitatively with the experiments.

Original language	English
Title of host publication	Proceedings of the International Cryogenic Engineering Conference
Editors	Gustav Klipping, Ingrid Klipping
Publisher	Engl
Pages	730-734
Number of pages	5
ISBN (Print)	0408012587
Publication status	Published - 1986

Publication series

Name	Proceedings of the International Cryogenic Engineering Conference
ISSN (Print)	0308-5422

All Science Journal Classification (ASJC) codes

Engineering(all)

Cite this

Funaki, K., Takata, Y., Takeo, M., Irie, F., Ruppert, U., Yang, W. Z., Kristen, E., Lueders, K., & Klipping, G. (1986). EFFECTS OF AN INSULATION LAYER ON THE PROPAGATION OF A NORMAL ZONE IN SUPERCONDUCTING WIRES BELOW 4. 2 K. In G. Klipping, & I. Klipping (Eds.), Proceedings of the International Cryogenic Engineering Conference (pp. 730-734). (Proceedings of the International Cryogenic Engineering Conference). Engl.

EFFECTS OF AN INSULATION LAYER ON THE PROPAGATION OF A NORMAL ZONE IN SUPERCONDUCTING WIRES BELOW 4. 2 K. / Funaki, K.; Takata, Y.; Takeo, M. et al.

Proceedings of the International Cryogenic Engineering Conference. ed. / Gustav Klipping; Ingrid Klipping. Engl, 1986. p. 730-734 (Proceedings of the International Cryogenic Engineering Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Funaki, K, Takata, Y, Takeo, M, Irie, F, Ruppert, U, Yang, WZ, Kristen, E, Lueders, K & Klipping, G 1986, EFFECTS OF AN INSULATION LAYER ON THE PROPAGATION OF A NORMAL ZONE IN SUPERCONDUCTING WIRES BELOW 4. 2 K. in G Klipping & I Klipping (eds), Proceedings of the International Cryogenic Engineering Conference. Proceedings of the International Cryogenic Engineering Conference, Engl, pp. 730-734.

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abstract = "The propagation velocity of a normal zone in NbTi multi-filamentary superconducting wires has been measured in the bath temperature range of 2. 05-4. 2 K. Bare and insulated wires were utilized for the experiment in order to examine the effect of an insulation layer. For the bare wire the propagation velocity decreases gradually with decreasing temperature, then drastic reduction was observed near the lambda point, and finally no propagation occurs in pressurized He II. For the insulated wire, on the other hand, the velocity is three times larger than that for the bare wire at 4. 2 K and the propagation was observed even in He II. Numerical analysis was performed for the insulated wire. The results agree quantitatively with the experiments.",

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AU - Funaki, K.

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AU - Takeo, M.

AU - Irie, F.

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N2 - The propagation velocity of a normal zone in NbTi multi-filamentary superconducting wires has been measured in the bath temperature range of 2. 05-4. 2 K. Bare and insulated wires were utilized for the experiment in order to examine the effect of an insulation layer. For the bare wire the propagation velocity decreases gradually with decreasing temperature, then drastic reduction was observed near the lambda point, and finally no propagation occurs in pressurized He II. For the insulated wire, on the other hand, the velocity is three times larger than that for the bare wire at 4. 2 K and the propagation was observed even in He II. Numerical analysis was performed for the insulated wire. The results agree quantitatively with the experiments.

AB - The propagation velocity of a normal zone in NbTi multi-filamentary superconducting wires has been measured in the bath temperature range of 2. 05-4. 2 K. Bare and insulated wires were utilized for the experiment in order to examine the effect of an insulation layer. For the bare wire the propagation velocity decreases gradually with decreasing temperature, then drastic reduction was observed near the lambda point, and finally no propagation occurs in pressurized He II. For the insulated wire, on the other hand, the velocity is three times larger than that for the bare wire at 4. 2 K and the propagation was observed even in He II. Numerical analysis was performed for the insulated wire. The results agree quantitatively with the experiments.

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EFFECTS OF AN INSULATION LAYER ON THE PROPAGATION OF A NORMAL ZONE IN SUPERCONDUCTING WIRES BELOW 4. 2 K.

Abstract

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