ABSTRACT
The steering of the beam trajectory in the Linac-to-booster (LTB) is important for achieving a good capture efficiency for the beam injected into the Booster. It is frequently tuned during operations. For the best capture efficiency, the LTB beam trajectory at the injection point should have the proper position and angle such that beam is at the center of acceptance in both transverse planes. The trajectory with the best capture performance can be recorded with the Beam position monitors and is used as the target for a trajectory correction program, which can maintain the LTB trajectory. In the beam-based dynamic aperture optimization for the SPEAR3 storage ring, the injection efficiency was used as the objective function and the injection kicker bump was reduced. The injection efficiency was measured through the beam current change in the storage ring and the intensity of the injected beam.
