The characteristics of a RAP crystal (RbHC8H4O4), metal-carbon multilayer X
-ray mirror and diamond-like carbon (DLC) X-ray mirror are compared. The ad
vantages of DLC mirrors in resolution power are described. Temperature and
radiation on the reflectivity and bandwidth of Bragg peak for diamond-like
mirrors are studied. It is shown that the parameters of DLC mirrors after a
nnealing in vacuum are stable up to 570 degrees C. (C) 1998 Published by El
sevier Science S.A. All rights reserved.