Performance of the SRRC-U10P quasi-periodic undulator

Author

Chang, C.H. ; Hwang, C.S. ; Lin, F.Y. ; Wang, C. ; Huang, M.H. ; Hsu, K.T.

Author_Institution

Synchrotron Radiat. Res. Center, Hsinchu, Taiwan

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

260

Lastpage

263

Abstract

SRRC has constructed a 2-meter long quasi-periodic undulator from a conventional undulator to produce an irrational harmonics radiation spectrum. A higher peak magnetic field was employed in a quasi-periodic position by adjusting the side magnet blocks and the shims to optimize the photon energy shift range and flux suppression ratio on the third and fifth harmonics of the spectrum. The magnetic design and the results of magnetic field measurement are reported. In addition, the spectral characteristics and flux are presented according to the computed and measured magnetic fields. The photon spectra of a conventional and a quasi-periodic undulator are compared.

Keywords

electromagnets; magnetic field measurement; wigglers; 2 m; SRRC; U10P quasi-periodic undulator; fifth harmonic; flux suppression ratio; irrational harmonics radiation spectrum; magnetic field; photon energy shift range; third harmonic; Contamination; Magnetic field measurement; Magnetic fields; Magnetic flux; Optical computing; Pollution measurement; Power harmonic filters; Storage rings; Synchrotron radiation; Undulators;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828224

Filename

828224