Title :
Passive end pole compensation scheme for a 1.8 Tesla wiggler
Author :
Chang, L.H. ; Wang, Ch. ; Chang, C.H. ; Fan, T.C.
Author_Institution :
Synchrotron Radiat. Res. Center, Hsinchu, Taiwan
Abstract :
An optimized end pole compensation scheme for the 1.8 Tesla, 25-pole wiggler W20/SRRC was studied by using 2D magneto-static code OPERA-2d. The maximum deviation of the dipole steering for this wiggler can be minimized either by optimizing the sizes of the bias magnets or by optimizing the easy-axis rotating angles of the permanent rotators. After optimization, the dipole steering is within 100 Gauss-cm in the operating gap range so that a passive compensation scheme is possible even for an insertion device configured with very strong on-axis magnetic field strength
Keywords :
beam handling techniques; wigglers; 1.8 T; 1.8 T wiggler; 2D magneto-static code; OPERA-2d; W20/SRRC; bias magnets; dipole steering; easy-axis rotating angles; insertion device; maximum deviation; operating gap range; optimized end pole compensation scheme; passive compensation scheme; passive end pole compensation scheme; permanent rotators; very strong on-axis magnetic field strength; Clamps; Error correction; Gaussian processes; Magnetic devices; Magnetic fields; Magnetostatics; Magnets; Periodic structures; Synchrotron radiation; Undulators;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505252
