Measurement of Propagation Velocities of the Normal Zone in a 1 mφ×1 m Superconducting Solenoid Magnet

Propagation velocities of the normal zone in a 1 mφ×1 m superconducting solenoid magnet were unambiguously measured as a function of the magnet excitation current by inducing quenches with a heater. The magnet was built to study the feasibility of constructing thin, large solenoid magnets and it has...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1981-01, Vol.20 (11), p.2243
Main Authors: Hirabayashi, Hiromi, Morimoto, Kimio, Wake, Masayoshi, Yamada, Ryuji, Yamamoto, Akira, Mori, Shigeki, Yoshizaki, Ryozo, Kawakami, Hisao, Kondo, Kunitaka, Aihara, Katsuzo, Kazawa, Yoshiaki, Kimura, Hiroshi, Ogata, Hisao, Saito, Ryusei, Suzuki, Shohei, Miyake, Yasuhiko
Format: Article
Language:English
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Summary:Propagation velocities of the normal zone in a 1 mφ×1 m superconducting solenoid magnet were unambiguously measured as a function of the magnet excitation current by inducing quenches with a heater. The magnet was built to study the feasibility of constructing thin, large solenoid magnets and it has a single layer aluminum-stabilized NbTi/Cu superconductor of 269 turns. The ratio of Al:NbTi:Cu of the conductor is 24:1:1. The design current of the conductor is 4.5 kA at 1.5 Tesla. Measured velocities are 30, 65, and 90 m/s in the direction of the conductor at 2020, 3030, and 3540 A, respectively. Thermal distributions inside the coil after quenches were quite uniform and no local overheating was observed.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.20.2243