The efficiency of conversion of the heat flux into hard x radiation (H
XR) is analyzed, via time-dependent two-temperature one-dimensional no
n-LTE-radiation-hydrodynamic numerical modeling, for a heat-to-radiati
on flux converter linked to the edge of a low-atomic-number hot Z-pinc
h. The domain of parameters in this scheme is found where about the sa
me HXR yield can be achieved at values of input energy which are an or
der of magnitude lower than in the conventional scheme of a radially i
mploding plasma. (C) 1997 American Institute of Physics.