Asymmetry, of the ionic cloud

The electrophoretic component Vg of the drift velocity of an ion is equal to the electrophoretic velocity of its ionic cloud because the central ion shares in the motion of its cloud. If one ignores the asymmetry of the ionic cloud, a simple calculation of the electrophoretic velocity Vg can be made. 

The Quantitative Measure of the Asymmetry of the Ionic Cloud around a Moving Ion... 

Eventually there is a critical frequency above lO s at which the ionic cloud cannot adjust anymore to the ion s movements in the right way because there is too much inertia to execute the rapid changes required by the oscillating applied field. The reciprocal of this critical frequency is called the relaxation time of the asymmetry of the ionic cloud. As a consequence, an increase in conductivity occurs at this frequency because there is no longer more charge behind the ion than in front. This increase in conductance at the critical frequency is called the Debye effect. It is part of the evidence that shows that the ionic atmosphere is indeed present and functioning according to the way first calculated by Debye. 

Asymmetry, of the ionic cloud, 514 Autocorrelation function ions, 415 liquid argon, 417... 

Since the latter arises from the distortion of the ionic cloud, one must derive a relation between the relaxation force and a quantity characterizing the distortion. It will be seen that the straightforward measure of the asymmetry of the cloud is the distance d through which the center of charge of the ion and the center of charge of the cloud are displaced. 

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