What is the longitudinal damping time?

Longitudinal damping time measures the time to damp a longitudinal plane (energy offset - longitudinal coordinate along the bunch) oscillation of a particle. For a centered orbit and a FODO lattice it is 2 as fast as the damping of transverse oscillations. The damping time scales with beam energy as 1/E3. The transverse damping times are given in the FCC-ee parameter table.

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