The ion dynamics in the Earth's magnetotail is studied in the case when a c
ross tail electric field E-o and reconnection-driven magnetic turbulence ar
e present in the current sheet. The magnetic turbulence observed by the Int
erball spacecraft is modeled numerically by a power law magnetic fluctuatio
n spectrum. A test particle simulation is performed for the ions, and the d
istribution function moments are obtained as a function of the magnetic flu
ctuation level, deltaB/B-o, and of the value of the normal component B-n. I
t appears that even in the presence of magnetic turbulence, the normal comp
onent has a marked influence on particle dynamics: the ion bulk velocity al
ong E-y and ion temperature are almost inversely proportional to B-n. The m
agnetic turbulence causes the current to split in two layers, and the level
of magnetic fluctuations needed to have splitting is roughly proportional
to B-n. It appears that in the relevant range of parameters, B-n and deltaB
/B-o have opposite effects on the current structure and on ion heating.