The results of work creating XUV instrumentation for the solar patrol mission

Abstract

Monitoring of the EUV and soft X-ray (XUV) solar flux variations is very important for needs of all humanity. These variations due to solar activity and their most effective manifestation — solar flares are the main cause of many events in the near-Earth space, the ionosphere and thermosphere, and even after a number of hypotheses, in social sphere and seismology. However, the permanent monitoring of the most important solar events in the spectral range of 0.8–120 nm does not exist, yet. This fact is mainly due to the technological and methodological difficulties of the space measurements in that spectral range.In this paper the first results of Russian project for creating an optical-electronic apparatus “The creation of the permanent space patrol of the EUV and soft X-ray solar radiation” are discussed. Primarily, the optical and electronic parts of the spectrometers and the radiometer are described in this paper. Both devices have almost the same electronic circuit based on the method of secondary electron counting. Sensitivity and dynamic range are calculated. The results show a possibility to achieve a linear dynamic range of six orders of magnitude without switching.