Title :
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
fDate :
3/1/2002 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2002.1018682
