Testing and commissioning of the als adjustable, hysteresis-free Chicane magnet
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The magnetic performance and commissioning of a new Advanced Light Source (ALS) chicane magnet are presented. The new magnet is iron free using permanent magnet rotors and trim coils, resulting in hysteresis-free operation. The theory and method for magnetic adjustments are discussed. Results of adjustments are presented that produce a maximum dipole field and reduce unallowed harmonics to below the required level of |bn/b1|<3times10-3