Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505251