Oscillations can also occur in the divertor region. There are certain oscillations which have no counterpart in the SOL or confined plasma. For example, fluctuations occur at the X-point when the inner divertor is detached and the outer divertor is attached. This is called the fluctuating regime of detachment. These X-point fluctuations can be understood by the propagation of the ionization front.

Another example is the so-called self-sustaining divertor oscillations.

relevent publication with a member of the working group

P. Manz, S. Potzel, F. Reimold, M. Wischmeier, ASDEX Upgrade team 'Stability and propagation of the high field side high density front in the fluctuating state of detachment in ASDEX Upgrade' Nuclear Materials and Energy, 12, 1152 (2017)

P. Heinrich, P. Manz et al. 'Self-sustained divertor oscillations in ASDEX Upgrade' Nucl. Fusion 60 076013 (2020)

R.D. Nem, P. Manz et al 'Quiescent regions below the X-point in ASDEX upgrade' Plasma Phys. Control. Fusion 63 065005 (2021)