Design of Comb Fabricated Halbach Undulators

Instruments

James Rosenzweig¹  Nathan Majernik¹ 

[1] Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095, USA;

关键词: undulators;    magnet design;    permanent magnets;    microfabrication;    nonconventional machining;   

DOI  :  10.3390/instruments3040058

来源: DOAJ

【 摘 要 】

An approach to fabricating Halbach array undulators using “combs” machined from single magnets is introduced. This technique is especially relevant to the fabrication of short period micro-undulators with period lengths considerably less than the few-centimeter-scale typical of current undulators. Manual, magnet-by-magnet assembly of micro-undulators would require the manipulation and alignment of thousands of magnets smaller than a grain of rice: comb fabrication dramatically increases the size of the basic unit cell of assembly with no increase in undulator period by creating many periods from a single piece, in a single machining modality. Further, as these comb teeth are intrinsically indexed to each other, tolerances are dictated by a single manufacturing step rather than accumulating errors by assembling many tiny magnets relative to each other. Different Halbach geometries, including $M^{\prime }=2$ , $M^{\prime }=4$ , isosceles triangle, and hybrid, are examined both from a theoretical perspective and with 3D magnetostatic simulations.

【 授权许可】

Unknown