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Abstract. Within the framework of the conceptual project ``Adaptive Plasma
EXperiment'' a trap with the closed magnetic field lines ``Experimental
Pseudo-Symmetric trap'' is examined. The project APEX is directed at the
theoretical and experimental development of physical foundations for
stationary thermonuclear reactor on the basis of an alternative magnetic
trap with tokamak-level confinement of high plasma. The fundamental
principle of magnetic field pseudosymmetry that should be satisfied for
plasma to have tokamak-like confinement is discussed. The calculated in
paraxial approximation examples of pseudosymmetric curvilinear elements with
poloidal direction of B isolines are adduced. The EPSILON trap consisting of
two straight axisymmetric mirrors linked by two curvilinear pseudosymmetric
elements is considered. The plasma currents are short-circuited within the
curvilinear element what increases the equilibrium
. The
untraditional scheme of MHD stabilization of a trap with the closed field
lines by the use of divertor inserted into axisymmetric mirror is analyzed.
The experimental installation EPSILON-OME that is under construction for
experimental check of divertor stabilization is discussed. The possibility
of ECR plasma production in EPSILON-OME under conditions of high density and
small magnetic field is examined.
IAEA 2001