Title :
Three-dimensional magnetic field analysis of a variably polarizing undulator
Author :
Nakamura, N. ; Shibuya, T. ; Koseki, T. ; Takaki, H. ; Kamiya, Y.
Author_Institution :
ISSP, Univ. of Tokyo, Chiba, Japan
Abstract :
The results of three-dimensional (3D) magnetic field analysis of a variably polarizing undulator for the SuperSOR project are presented. In this analysis, the 3D magnetic fields due to the magnet arrays of the undulator were calculated for three polarization modes and magnetic field errors due to iron beams supporting the magnet arrays were also estimated for the three modes. Furthermore effects of eddy currents of the undulator vacuum chamber were studied for 1Hz switching of left- and right-handed circular polarization states that is achieved by mechanical driving of the magnet arrays
Keywords :
X-ray production; accelerator magnets; electromagnets; electron accelerators; electron beams; polarisation; storage rings; wigglers; 1 Hz; SuperSOR project; circular polarization states; eddy currents; iron beams; magnet arrays; magnetic field errors; polarization modes; synchrotron light source; three-dimensional magnetic field analysis; undulator vacuum chamber; variably polarizing undulator; Magnetic analysis; Magnetic fields; Magnetic materials; Magnetic separation; Magnetic switching; Permanent magnets; Phased arrays; Polarization; Switches; Undulators;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987907
