><b><a name='TDIonicTimeScale'></a>TDIonicTimeScale</b>
<br/><i>Section</i>: Time-Dependent::Propagation
<br/><i>Type</i>: float
<br/><i>Default</i>: 1.0
<br/><br> This variable defines the factor between the timescale of ionic
 and electronic movement. It allows reasonably fast
 Born-Oppenheimer molecular-dynamics simulations based on
 Ehrenfest dynamics. The value of this variable is equivalent to
 the role of <math>\mu</math> in Car-Parrinello. Increasing it
 linearly accelerates the time step of the ion