Design of epoxy-free superconducting dipole magnets and performance in both Helium I and pressurized Helium II

Author

Taylor, C. ; Althaus, R. ; Caspi, S. ; Gilbert, W. ; Hassenzah, W. ; Meuser, R. ; Rechen, J. ; Warren, R.

Author_Institution

University of California, Berkeley, California

Volume

17

Issue

5

fYear

1981

fDate

9/1/1981 12:00:00 AM

Firstpage

1571

Lastpage

1574

Abstract

Three model superconducting dipole magnet 1m long, without iron, having a bore diameter of 76 mm have been built without epoxy resins or other adhesives and tested in He I and He II. The conductor is the 23-strand Rutherford-type cable used in the Fermilab Doubler Saver magnets, and is insulated with Mylar and Kapton. The two-layer winding is highly compressed by a system of structural support rings and tapered collets. Little "training" was required to reach quench currents greater than 95 percent of "short sample" in Helium I. The maximum quench current in He II is increased 20 to 30 percent, compared with He I operation at 4.4 K. Test results are given on cyclic losses, heater-induced quenches, and charge-rate effects.

Keywords

Accelerator magnets, superconducting; Plastics; Assembly; Boring; Cable insulation; Conductors; Helium; Superconducting cables; Superconducting coils; Superconducting magnets; Testing; Wounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1981.1061424

Filename

1061424