  We apply the time-dependent analytical R-matrix theory to develop a movie of
hole motion in a Kr atom upon ionization by strong circularly polarized field.
We find rich hole dynamics, ranging from rotation to swinging motion. The
motion of the hole depends on the final energy and the spin of the
photoelectron and can be controlled by the laser frequency and intensity.
Crucially, hole rotation is a purely non-adiabatic effect, completely missing
in the framework of quasistatic (adiabatic) tunneling theories. We explore the
possibility to use hole rotation as a clock for measuring ionization time.
Analysing the relationship between the relative phases in different ionization
channels we show that in the case of short-range electron-core interaction the
hole is always initially aligned along the instantaneous direction of the laser
field, signifying zero delays in ionization. Finally, we show that strong-field
ionization in circular fields creates spin currents (i.e. different flow of
spin-up and spin-down density in space) in the ions. This phenomenon is
intimately related to the production of spin-polarized electrons in strong
laser fields [Barth I and Smirnova O 2013 Phys. Rev. A 88 013401]. We
demonstrate that rich spin dynamics of electrons and holes produced during
strong field ionization can occur in typical experimental conditions and does
not require relativistic intensities or strong magnetic fields.
