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Measurement of quench back behavior on the normal zone propagation velocity in a CICC

✍ Scribed by Toshinari Ando; Masataka Nishi; Takashi Kato; Jun Yoshida; Noboru Itoh; Susumu Shimamoto

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 398 KB
Volume: 34
Category: Article
ISSN: 0011-2275
DOI: 10.1016/s0011-2275(05)80140-7

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✦ Synopsis

The normal zone propagation velocity in a cable-in-conduit conductor (CICC) has been experimentally investigated. The CICC used for this experiment consists of eighteen NbTi/Cu composite strands inserted in a stainless steel conduit with 26 m length. The measurement of the propagation velocity of the normal front was carried out by observing the appearance of the resistive voltage on each of taps attached to the conductor. In this experiment the quench back behavior that the propagation velocity is suddenly increased, was observed, which has been predicted from numerical simulations by C. Luongo et al. The behavior was influenced by the initial helium pressure within the conduit and was easy to occur at low pressure.

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✍ C. Schmidt 📂 Article 📅 1978 🏛 Elsevier Science 🌐 English ⚖ 525 KB

E ~per/ments were performed to measure the rain/mum energy, E, of an instantaneous point source, needed to mduce a propagating normal transition (quem?h) m a superconductor. The energy pulse was supphed to the superconductor by a mm/atur/zed heater element which had a thermal time constant of "" 20