The Effect of Magnetic Field on the Position of HTS Leads and the Cooler in the Services Tower of the MICE Focusing Magnet

Author

Green, M.A. ; Yang, S.Q. ; Cobb, J. ; Lau, P. ; Lau, W.W. ; Witte, H. ; Baynham, D.E. ; Bradshaw, T.W.

Author_Institution

Lawrence Berkeley Nat. Lab., Berkeley, CA

Volume

18

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

1447

Lastpage

1450

Abstract

The MICE focusing solenoids have three 4 K coolers (two for the superconducting magnet and one for the liquid absorber) and four HTS leads that feed the current to the focusing coils. The focusing solenoids produce large radial external fields when they operate with the polarity of the two coils in opposition (the gradient or flip mode). When the MICE focusing coils operate at the same polarity (the solenoid or non-flip mode), the fields are much smaller and parallel to the axis of the solenoid. The worst-case magnetic field affects the selection of the cooler and the HTS leads. This magnetic field can also determine the height of the service towers that house the three coolers and the four HTS leads. This paper shows the criteria used for Cooler selection, HTS lead selection, and the position of both the cooler and leads with respect to the solenoid axis of rotation.

Keywords

high-temperature superconductors; magnetic field effects; solenoids; superconducting magnets; HTS lead position; MICE focusing magnet; MICE focusing solenoids; cooler selection; high-temperature superconductors; liquid absorber; magnetic field effect; radial external fields; service towers; superconducting magnet; 4 K cooler; HTS leads; service tower;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2008.921273

Filename

4520239