Speaker
Description
In the cooling storage ring, a low-temperature electron beam from the electron cooling device overlaps with a high-temperature ion beam over a finite interaction length at matched average velocities. Through Coulomb interactions, electrons absorb excess thermal energy from the ions, thereby reducing the transverse emittance and longitudinal momentum spread of the ion beam and increasing its phase space density. When cooling a Gaussian-distributed bunched ion beam with a longitudinal hollow electron beam, the longitudinal centers of both bunches must remain matched. This paper presents a phase match scheme for the longitudinal hollow electron beam and the ion beam, comprising bunch measurement, trigger delay setting, phase match monitoring, and a prospective feedback mechanism for automatic correction. The scheme ensures sustained bunch phase match and will be employed in longitudinal hollow electron beam cooling experiments at CSRm, supporting future investigations into the hollow beam cooling dynamics.
Funding Agency
NSFC No. 12275325, 12275323, 12305159.
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