Short multipole magnet designs for JLab FEL upgrade

Author

Smirnov, A. ; Newsham, D. ; Luo, Y. ; Yu, D. ; Biallas, G. ; Wines, R.

Author_Institution

DULY Res. Inc., Rancho Palos Verdes, CA, USA

Volume

3

fYear

2003

fDate

12-16 May 2003

Firstpage

2135

Abstract

Novel designs for octupole and sextupole magnet families for the JLab 10 kW IR FEL upgrade were developed and characterized. The designs were made with 3D simulations, and provided very short effective length that nearly equals the aperture radius, along with 1% accuracy of the field integral over 70% of a large aperture. The main feature is shaping of the cylindrical pole tips to provide high field quality dominated by fringe fields. Other features include magnetically isolated field clamps, usage of non-tapered coils of standard racetrack shape, and non-linear saturation effects (for sextupole magnets).

Keywords

accelerator magnets; electromagnets; free electron lasers; particle beam dynamics; 10 kW; 3D simulations; JLab IR FEL upgrade; aperture radius; cylindrical pole tips; field integral; fringe fields; magnetically isolated field clamps; nonlinear saturation effects; octupole magnet; sextupole magnet; short multipole magnet designs; standard racetrack shape; Apertures; Clamps; Coils; Lattices; Magnetic flux; Magnetic flux leakage; Optical beams; Saturation magnetization; Shape; Structural beams;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1288808

Filename

1288808