Status of the APS diagnostics undulator beamline

Author

Yang, B.X. ; Lumpkin, A.H. ; Goeppner, G.A. ; Sharma, Shantanu ; Rotela, E. ; Sheng, I.C. ; Moog, E.

Author_Institution

Argonne Nat. Lab., IL, USA

Volume

2

fYear

1997

fDate

12-16 May 1997

Firstpage

2207

Abstract

We report the status of the diagnostics undulator beamline for the Advanced Photon Source (APS) storage ring. The beamline was designed for the characterization of the 7-GeV, low-emittance positron beam at high resolution. The special diagnostics undulator has been manufactured by STI Optronics. The device exhibits very low magnetic field errors at closed gap of 10.5 mm: first field integral less than 15 gauss·cm, and optical phase error less than 1.5°. The front end of the beamline and a monochromator are installed and tested for use on divergence and directional stability measurements with a target resolution of 3 μrad utilizing the first harmonic radiation of 25 keV. Initial results for the divergence measurement show that the storage ring is operating well within its design goals

Keywords

electron accelerators; particle beam diagnostics; storage rings; wigglers; 7 GeV; APS diagnostics undulator beamline; Advanced Photon Source storage ring; directional stability; divergence; harmonic radiation; low-emittance positron beam; magnetic field errors; monochromator; Apertures; Magnetic devices; Magnetic field measurement; Optical coupling; Particle beam measurements; Particle beams; Particle measurements; Power system harmonics; Storage rings; Undulators;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.751157

Filename

751157