Thermal behavior of a composite superconductor in stability margin experiments

Author

Senba, Tomoyuki ; Yamaguchi, Satarou ; Yanagi, Nagato ; Mito, Toshiyuki ; Yamamoto, Junya ; Motojima, Osamu ; Emoto, Masahiko

Author_Institution

Dept. of Fusion Sci., Nat. Inst. for Fusion Sci., Nagoya, Japan

Volume

32

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

3085

Lastpage

3088

Abstract

We carried out a two-dimensional thermal analysis for the purpose of estimating the net input energy needed to cause quench in stability. The analysis model was based of a composite superconductor, with a configuration of 12.5 mm×18.0 mm Cu sheathed NbTi/Cu with Al stabilizer. The results showed that the large heat capacity and low thermal conductivity of the heaters, composed of alloys and polymers, hindered thermal diffusion from the heaters to the conductor. Considering experimental total input energy to be its stability margin may overestimate the stability of the conductor, while appropriate thermal analysis with experiments can estimate net input energy, which can be regarded as the real stability margin

Keywords

composite superconductors; copper; niobium alloys; thermal analysis; thermal diffusion; titanium alloys; Al; Al stabilizer; Cu sheathed NbTi/Cu; NbTi-Cu; composite superconductor; heat capacity; heater; quench; stability margin; thermal conductivity; thermal diffusion; two-dimensional thermal analysis; Conducting materials; Conductors; Magnetic field measurement; Polymers; Stability analysis; Superconducting magnets; Temperature; Thermal conductivity; Thermal quenching; Thermal stability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.511528

Filename

511528