  The ensemble of Euclidean gluon field configurations represented by the
domain wall network is considered. A single domain wall is given by the
sine-Gordon kink for the angle between chromomagnetic and chromoelectric
components of the gauge field. The domain wall separates the regions with
self-dual and anti-self-dual fields. The network of the domain wall defects is
introduced as a combination of multiplicative and additive superpositions of
kinks. The character of the spectrum and eigenmodes of color-charged
fluctuations in the presence of the domain wall network is discussed. The
concept of the confinement-deconfinement transition in terms of the ensemble of
domain wall networks is outlined. Conditions for the formation of thick domain
wall junction during heavy ion collisions are discussed, and the spectrum of
color charged quasiparticles inside the trap is evaluated. An important
observation is the existence of the critical size $L_c$ of the trap stable
against gluon tachyonic modes, which means that deconfinement can occur only in
a finite region of space-time in principle. The size $L_c$ is related to the
value of gluon condensate $\langle g^2F^2\rangle$.
