The $\bf {E × B}$ staircase of magnetised plasmas
Abstract
We show that a class of near-marginal and low-collisional magnetised plasmas naturally
evolve into a globally organised state dubbed the $\bf {E × B}$ staircase’. A key signature of this
self-organised state is the containment of avalanche activity, detrimental for confinement, by a
series of microbarriers for transport, the staircase steps, beneficial for confinement. Conditions
for existence of the $\bf {E × B}$ staircase, impact on transport and confinement and robustness in
parameter space are discussed
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