Contribution of iron yoke on helical coils [for RHIC]

Author

Tominaka, T. ; Okamura, M. ; Katayama, T.

Author_Institution

RIKEN, Inst. of Phys. & Chem. Res., Saitama, Japan

Volume

12

Issue

1

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

1479

Lastpage

1482

Abstract

In order to estimate the field contribution due to an axially symmetric iron yoke for a helical magnet, a three-dimensional magnetic scalar potential problem with helical symmetry is solved. It is confirmed that the asymptotic forms for potential and field coincide with those for the two-dimensional magnet, in the limit of large twist pitch length. Then, it is also confirmed that the obtained analytical expression for the magnetic field is consistent with the numerical field calculation.

Keywords

Bessel functions; accelerator magnets; colliding beam accelerators; electromagnetic induction; finite element analysis; ion accelerators; storage rings; superconducting coils; superconducting magnets; 3D magnetic scalar potential problem; RHIC; TOSCA calculation; asymptotic forms; axially symmetric iron yoke; bifilar helical current conductor; field contribution; finite elements; helical coils; helical symmetry; large accelerator; large twist pitch length; magnetic induction; modified Bessel function; superconducting magnets; two-dimensional magnet; Conductors; Helium; Iron; Magnetic analysis; Magnetic fields; Permeability; Region 1; Saturation magnetization; Superconducting coils; Superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2002.1018682

Filename

1018682