Modelling of dual stability in a cable-in-conduit conductor [for NET]

Author

Bottura, L. ; Minervini, J.V.

Author_Institution

NET Team, Garching, West Germany

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

1900

Lastpage

1903

Abstract

A zero-dimensional stability model has been developed for cable-in-conduit superconductors. The model is effective in simulating the multivalued stability behavior in the vicinity of the limiting current. This has been achieved by modifying the helium heat transfer coefficient to account for inertial and frictional terms which affect the induced helium flow. The model can reproduce with remarkable accuracy the multivalued stability behavior shown in earlier measurements performed by J.W. Lue et al. (1980). A first-order approximation of the effect of the steady-state mass flow is introduced in the model, showing how an increase of the steady-state mass flow rate tends to wash away the multiple stability region as observed in the experiment

Keywords

Tokamak devices; fusion reactor theory and design; heat transfer; numerical analysis; stability; superconducting cables; superconducting magnets; cable-in-conduit superconductors; dual stability; first-order approximation; frictional terms; inertial terms; limiting current; multivalued stability behavior; steady-state mass flow; zero-dimensional stability model; Conductors; Copper; Heat transfer; Helium; Pulse shaping methods; Stability; Superconducting cables; Superconductivity; Temperature; Wire;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133571

Filename

133571