Direct experimental comparison of sensitivity of two microprocessors with application of various single events effect (SEE) control methods at influence of different heavy ions flux is presented. The question of optimality of a ratio between productivity, a fault-tolerance and power consumption is considered. The mean fluence between failures (MFBF) for sensitivity comparison is offered.

Questions of radiation protection of the aircrafts radio electronic equipment are considered. The technique allowing to determine optimum parameters of radio electronic equipment protection at impact of pulse ioni-zing radiation is offered. This technique is universal and is suitable for parameters calculation of radiation protection of any difficult heterogeneous objects. Calculations are executed by the Monte Carlo method in flat and cylindrical axisymmetric geometry.

The connection of the term "quality" with the concepts "reliability", "hardness" of products and "risk" is made. The conceptual and mathematical apparatus of the reliability theory is in detail studied out and the parallel with the hardness theory is drawn. Domestic and foreign experience and also the international, national and industry standards in the quality ensuring of different technological systems is considered. It is offered to apply the available developed methodology of the analysis and assessment of reliability and risk to problems of providing, forecasting and assessment of radiation hardness of the space radio electronic equipment at all stages of life cycle.

Influence of use of the dynamic Earth´s magnetic field model when calculating dose loads of the communication spacecraft making flight into a geostationary orbit with use by own low thrust electric propulsion system is investigated. Comparative assessment of cumulative dose of space ionizing radiation when using static and dynamic Earth´s magnetic field model is given. Conditions under which use of static Earth´s magnetic field model leads to significant understating in dose characteristics assessment are considered, and the corresponding recommendations about use of dynamic Earth´s magnetic field model are issued.

The results of studies of thermal control coating samples of high-orbital satellites irradiated with electrons and protons with energy characteristic of hot magnetospheric plasma are presented. Changes in morpho-logy of irradiated samples were by atomic force microscopy investigated, and changes in their spectral reflectance were using a double beam spectrophotometer recorded. It was shown that at proton irradiation on the samples surface the gas filled bubbles are formed. At electron irradiation the microprojection and discharge channels on the samples are by electrostatic discharges caused. It was found that the microstructures formation on the surfaces of irradiated samples has no significant effect on their optical properties.

The calculation model of forecasting of radiation integrated parameters and also neutrons power distributions in reference points on nuclear reactor PRIZ-M by comparison of calculated data to the most consistent measurements results in two mutually perpendicular directions is verified. It is shown that discrepancies between the measured and calculated ranges of fast neutrons do not exceed 17 %, between fluences of neutrons – 27.3 %, and between gamma radiation doses – 24.7 %, that demonstrates reliability of calculation model.

Dose curves of electron radiation of simulator ARSA-2 – dependence of relative values of the absorbed dose of electron radiation on distance to its target are defined. Ranges of the absorbed dose in silicon of simulator electron radiation for all tungsten diaphragms used for discrete change of electron radiation levels are established. The programs used at dosimetric maintenance of tests in the electron radiation mode are made. The three-dimensional distribution of electron radiation field of simulator is preliminary estimated.