Laboratory calibration of the X-ray-spectrometer for space solar patrol mission

During the solar flares the absolute radiation flux increases essentially and the most significant increase (up to the factor of 10(4)) takes place the soft X-ray spectral range. In 2001 - 2002 the solar X-ray-spectrometer was built in the S.I. Vavilov Space Optical Institute in the framework of the project 1523 of the International Science and Technology Center with the support of European Community and Republic of Korea. The instrumentation is dedicated for permanent registration of absolute solar fluxes during the all periods of solar activity - from quiet Sun to the most powerful solar flares. The paper describes the results of our work in progress on development of optical-electronic apparatus for Space Patrol of solar soft X-ray and extreme ultraviolet radiations and presents the last device of this apparatus - solar X-ray-spectrometer and the first results of its laboratory testing. There are the plans to install this apparatus for the Space Solar Patrol at the Russian Module of the International Space Station and at the satellite with solar-synchronous orbit at the altitude of 550 km to be launched by the M.V. Khrunichev State Space Center.