Accurate calculation of magnetic fields in the end regions of superconducting accelerator magnets using the BEM-FEM coupling method

Author

Kurz, S. ; Russenschuck, S.

Author_Institution

ITE, Stuttgart Univ., Germany

Volume

4

fYear

1999

fDate

1999

Firstpage

2796

Abstract

In this paper a new technique for the accurate calculation of magnetic fields in the end regions of superconducting accelerator magnets is presented. This method couples boundary elements (BEM) which discretize the surface of the iron yoke and finite elements (FEM) for the modelling of the nonlinear interior of the yoke. The BEM-FEM method is therefore specially suited for the calculation of 3-dimensional effects in the magnets, as the coils and the air regions do not have to be represented in the finite-element mesh and discretization errors only influence the calculation of the magnetization (reduced field) of the yoke. The method has been recently implemented into the CERN-ROXIE program package for the design and optimization of the LHC magnets. The field shape and multipole errors in the two-in-one LHC dipoles with its coil ends sticking out of the common iron yoke is presented

Keywords

accelerator magnets; boundary-elements methods; finite element analysis; magnetic fields; proton accelerators; storage rings; superconducting magnets; synchrotrons; BEM-FEM coupling method; BEM-FEM method; LHC; ROXIE; boundary element; end region; field shape; finite element; iron yoke; magnetic field; multipole errors; superconducting accelerator magnets; two-in-one dipoles; Accelerator magnets; Coils; Couplings; Finite element methods; Iron; Large Hadron Collider; Magnetic fields; Magnetization; Packaging; Superconducting magnets;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.792941

Filename

792941