Passive End Pole Compensation Scheme for a 1.8 Tesla Wiggler
نویسندگان
چکیده
An optimized end pole compensation scheme for the 1.8 Tesla, 25-pole wiggler W20/SRRC was studied by using 2D magnetostatic 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.
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