Iron shimming of superconductive rotating dipoles

Author

Cavenago, M. ; Moisio, M.F.

Author_Institution

Laboratori Nazionali, Istituto Nazionale di Fisica Nucl., Legnaro, Italy

Volume

30

Issue

4

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1923

Lastpage

1926

Abstract

The design rules and constraints of a superconductive rotating dipole, aimed at providing a 9-10 T field in the central bore for material and vacuum polarization researches, are briefly reviewed. A careful control of |B| maxima is imperative: since an ideal cos θ configuration can not be exactly implemented by coil without spacers, a |B| peak develops at a coil border. An economical correction of it at the price of an non-essential increase of field inhomogeneity, consists in the insertion of completely saturated iron shims in the polar region. The effect of these shims an coil ends is treated as well. Simple analytic rules and TOSCA simulations are presented: stray fields are found to be negligible

Keywords

iron; superconducting magnets; 9 to 10 T; Fe; Fe shimming; TOSCA simulations; analytic rules; central bore; coil border; completely saturated shims; design constraints; design rules; economical correction; field inhomogeneity; ideal cos &thetas; configuration; material research; polar region; stray fields; superconductive rotating dipoles; vacuum polarization research; Boring; Coils; Iron; Magnetic fields; Magnetic flux; Polarization; Saturation magnetization; Superconducting device noise; Superconducting magnets; Superconductivity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.305639

Filename

305639