Magnetic design of the Advanced Light Source elliptical wiggler

Author

Marks, S. ; Akre, J. ; Hoyer, E. ; Humphries, U. ; Jackson, T. ; Minimihara, Y. ; Pipersky, P. ; Plate, U. ; Schlueter, R.

Author_Institution

Lawrence Berkeley Lab., CA, USA

Volume

32

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

2621

Lastpage

2624

Abstract

An elliptical wiggler has been designed for installation in the Advanced Light Source at the Lawrence Berkeley Laboratory. The design has been optimized for the production of circularly polarized light in the 50 eV to 10 KeV energy range. The device will be 3.4 m long consisting of vertical and horizontal periodic structures. The period length for both is 20 cm. The vertical structure is a hybrid permanent magnet design which produces a peak field of 2.0 T. The horizontal magnetic structure is an iron core electromagnetic design shifted longitudinally by one-quarter period relative to the vertical structure; it has a peak field of 0.096 T. The polarity of the horizontal field can be switched at a rate of up to 1 Hz, which results in a modulation of the chirality of the circularly polarized radiation on-axis. This paper discusses the magnetic design and presents the results of radiation spectrum calculations used for determining optimal field parameter settings

Keywords

X-ray production; accelerator magnets; electromagnetic wave polarisation; electromagnets; electron accelerators; permanent magnets; storage rings; wigglers; 0.095 T; 2.0 T; 50 eV to 10 keV; Advanced Light Source; chirality; circularly polarized light; elliptical wiggler; horizontal structure; hybrid permanent magnet; iron core electromagnet; magnetic design; periodic structure; radiation spectrum; vertical structure; Design optimization; Electromagnetic radiation; Iron; Laboratories; Light sources; Optical polarization; Periodic structures; Permanent magnets; Production; Undulators;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.511411

Filename

511411