Axial Proximity before radial/angular dephasing

The 2 ion populations spend considerable time in close axial proximity before they mutually dephase in the axial direction.

The two ion populations also have the same orbital radius, placing the angularly and radially dephased “rings” of ions in close contact radially

Axial and radial proximity before dephasing determines the extent of peak coalescence.

The following simulations illustrate this point, as they differ only in the initial relative phase of the interacting ion populations, yet one leads to partial coalescence and the other shows no effect.