Magnetohydrodynamic simulation results related to the
capillary discharge dynamics are presented. The main physical
process that should be taken into account is the ablation
of the capillary wall material evaporated by the heat flux
from the capillary plasma. The possible applications of
the capillary discharges related to the physics of the
X-ray lasers and the use of the capillary plasma to provide
a guiding for ultrashort high-intensity laser pulses over
a distance greater than the defocusing length are discussed.
