Magnetic Measurement and Shimming for EPU100 of SSRF

Author

Zhang, Wei ; Lu, Jie ; Zhou, Qiaogen ; Wang, Hongfei

Author_Institution

Shanghai Inst. of Appl. Phys., Shanghai, China

Volume

20

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

296

Lastpage

299

Abstract

An elliptically polarizing undulator EPU100 has been built in Shanghai Synchrotron Radiation Facility (SSRF) recently. This undulator adopts the APPLE-II type magnet configuration and has a total length 4.3 m with a period of 100 mm. It was designed to provide synchrotron radiations with various polarizations including the circular, the elliptical, the horizontally linear and the vertically linear polarizations. The magnetic measurement has been finished by using a 3-dimensional Hall probes and flipping coil system. This paper details the method of the magnetic measurement and shimming for EPU100. The maximum R.M.S. phase errors 3.8 and 2.2 are calculated from the measured magnetic fields respectively in the horizontally and vertically linear polarization modes.

Keywords

electron beams; polarisation; synchrotron radiation; synchrotrons; 3-dimensional Hall probes; APPLE-II type magnet configuration; SSRF; Shanghai Synchrotron Radiation Facility; electron beam energy; elliptically polarizing undulator; flipping coil system; linear polarizations; magnetic measurement; magnetic shimming; phase errors; synchrotron radiations; APPLE-II; elliptically polarizing undulator; magnetic shimming;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2039783

Filename

5422800