We cross-checked the timing. Laser pulse is detected at bins 136 (PD-North) and 171 (PD-south), respectively. Therefore, the laser puls is in the electron cooler at 153.5. The revolution period corresponds to 3e8Hz / 1.54315MHz = 194. 
The ion bunch must travel 2.5m more than the half of the circumference (108.3m). Taking this into account, the ion bunch must be detected (0.5 + 2.5 / 108.3) * 194 = 101.5 bins later (meaning less) than 153.5.
Finally, we are happy that the timing is still perfect, since the ion bunch arrives at 52.