US Patent No. 10,485,089

HELICAL PERMANENT MAGNET STRUCTURE AND UNDULATOR USING THE SAME


Patent No. 10,485,089
Issue Date November 19, 2019
Title Helical Permanent Magnet Structure And Undulator Using The Same
Inventorship Cheng-Ying Kuo, Hsinchu (TW)
Cheng-Hsing Chang, Hsinchu (TW)
Cheng-Hsiang Chang, Hsinchu (TW)
Assignee NATIONAL SYNCHROTRON RADIATION RESEARCH CENTER, Hsinchu (TW)

Claim of US Patent No. 10,485,089

1. A helical permanent magnet structure, comprising:at least one magnet assembly, comprising:
a plurality of permanent magnets with a magnetization direction, the permanent magnets being formed as helical shape and arranged as a helical surface, and the center of the helical surface having a longitudinal passage for being passed through by a charged particle; and
a plurality of poles with the same amount of the permanent magnets, wherein the poles are magnetized by the permanent magnets and absorb on one side of the permanent magnets; and
an inner frame surrounding outside and limiting the magnet assembly,
wherein the magnet assembly further comprises a plurality of positioning members, and the permanent magnets and the poles are positioned in the inner frame.