Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.751157
