Preliminary results of the partial-array LCT coil tests

Author

Luton, J.N. ; Cogswell, F.D. ; Dresner, L. ; Ellis, J.F. ; Fietz, W.A. ; Friesinger, G.M. ; Gray, W.H. ; Iwasa, Y. ; Koizumi, K. ; Lubell, M.S. ; Lue, J.W. ; May, J.R. ; Nishi, M.F. ; Peck, S.D. ; Schwenterly, S.W. ; Shen, S.S. ; Stamps, R.E. ; Takahshi,

Author_Institution

Oak Ridge National Laboratory, Oak Ridge, Tennessee

Volume

21

Issue

2

fYear

1985

fDate

3/1/1985 12:00:00 AM

Firstpage

238

Lastpage

241

Abstract

The Large Coil Task (LCT) is a collaboration between the US, Euratom, Japan, and Switzerland for the production and testing of 2.5 × 3.5 m bore, superconducting 8-T magnets. The definitive tests in the design configuration, the six coils arrayed in a compact torus, will begin in 1985. Partial-array tests are being done in 1984. In January the initial cooldown of two coils was aborted because of helium-to-vacuum leaks that developed in certain seal welds when the coil temperatures were 170 to 180 K. In July three adjacent coils (designated JA, GD, CH) were cooled, and in August two were energized to the limits of the test facility. An overview of the results is presented, including facility, cooldown, energization, dump, recovery from intentional normal zones, strain, and displacement, for operation up to 100% of design current but below full field and stress. These initial results are highly encouraging.

Keywords

Superconducting coils; Boring; Collaboration; Production; Seals; Superconducting coils; Superconducting magnets; Temperature; Test facilities; Testing; Welding;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1985.1063613

Filename

1063613