Design of end magnetic structures for the Advanced Light Source wigglers

Author

Humphries, D. ; Akre, J. ; Hoyer, E. ; Marks, S. ; Minamihara, Y. ; Pipersky, P. ; Plate, D. ; Schlueter, R.

Author_Institution

Lawrence Berkeley Lab., California Univ., Berkeley, CA, USA

Volume

3

fYear

1995

fDate

1-5 May 1995

Firstpage

1447

Abstract

The vertical magnetic structures for the Advanced Light Source 15 cm planar wiggler and 20 cm period elliptical wiggler are of hybrid permanent magnet design. The ends of these structures are characterized by diminishing scalar potential distributions of the poles which control beam trajectories. They incorporate electromagnetic correction coils to dynamically correct for variations in the first integral of the field as a function of gap. A permanent magnet trim mechanism is incorporated to minimize the transverse integrated error field distribution. The ends were designed using analytic and computer modeling techniques. The design and modeling results are presented

Keywords

accelerator magnets; electron accelerators; permanent magnets; storage rings; wigglers; ALS wigglers; Advanced Light Source wigglers; control beam trajectories; diminishing scalar potential distributions; electromagnetic correction coils; end magnetic structures; first integral; hybrid permanent magnet; period elliptical wiggler; permanent magnet trim mechanism; planar wiggler; transverse integrated error field distribution; vertical magnetic structures; Clamps; Coils; Cooling; Electric resistance; Inductance; Light sources; Power supplies; Temperature; Undulators; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505251

Filename

505251