The construction of a 9-pole prototype for SRRC U-10 undulator

Author

Chan, Chi Hou ; Chang, C.H. ; Chen, H.H. ; Fan, T.C. ; Hwang, C.S. ; Guo, D.N. ; Hsu, J.Y. ; Lin, F.Y. ; Lin, T.F. ; Wang, Ch. ; Yeh, S.T. ; Hwang, G.J. ; Tseng, P.K.

Author_Institution

Synchrotron Radiat. Res. Center, Hsinchu, Taiwan

Volume

32

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

2629

Lastpage

2632

Abstract

A 9-pole undulator prototype with a magnetic period length of 10 cm was designed and constructed to examine the mechanical and magnetic field performance. The hybrid permanent magnet structure was optimized by using 2D “PANDIRA” and 3D “TOSCA” magnetostatic codes. A half period magnet model was also fabricated to verify the magnetic field strength on-axis and the transverse field roll-off within 0.1 % in the good field region of ±10 mm at a minimum gap minimum gap of 22 mm. The end pole configurations, as equipped with either two tunable permanent magnetic rotators or steering coil correctors were designed for minimizing the deviation of the magnetic field strength integrals. The magnet structures were mounted on a 2 meter long C-frame support structure in which the gap could be moved in parallel and phase motion. The field characteristics and measurement results between the adjustable gap undulator (AGU) and the hybrid adjustable phase undulator (APU) were also presented

Keywords

accelerator magnets; electron accelerators; permanent magnets; storage rings; synchrotron radiation; wigglers; 2D PANDIRA code; 3D TOSCA code; C-frame support structure; SRRC U-10 undulator; adjustable gap undulator; adjustable phase undulator; hybrid permanent magnet; magnetic field; magnetostatic analysis; mechanical characteristics; multipole magnet; steering coil corrector; tunable rotator; Assembly; Coils; Design optimization; Magnetic field measurement; Magnetic flux; Magnetostatics; Permanent magnets; Prototypes; Saturation magnetization; Undulators;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.511413

Filename

511413