Title :
Magnetic performance of the Advanced Light Source EPUS5.0 elliptically polarizing undulator
Author :
Marks, S. ; DeVries, J. ; Hoyer, E. ; Kincaid, B.M. ; Plate, D. ; Pipersky, P. ; Schleuter, R.D. ; Young, A.
Author_Institution :
Lawrence Berkeley Nat. Lab., CA, USA
Abstract :
An elliptically polarizing undulator (EPU) has been assembled, tested, and installed in the Advanced Light Source (ALS) storage ring. It is a 2 m long pure permanent magnet device with a 5.0 cm period capable of providing polarized radiation of any ellipticity. This paper reports on the program of magnetic measurements and field tuning, and final magnetic and drive system performance. A summary of measurement results, calculated radiation spectral performance, and a description of the magnetic shimming procedure used for field tuning are included
Keywords :
electron accelerators; permanent magnets; storage rings; wigglers; ALS storage ring; Advanced Light Source EPUS5.0 elliptically polarizing undulator; field tuning; magnetic measurements; magnetic performance; magnetic shimming procedure; polarized radiation; pure permanent magnet device; radiation spectral performance; Assembly; Light sources; Magnetic field measurement; Magnetic variables measurement; Optical polarization; Permanent magnets; Storage rings; System performance; Testing; Undulators;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795652
