The microelectronics latch-up by action of single voltage pulses with different amplitude-time characteristics is researched. It is shown that results of single voltage pulses experiments can be used for preliminary selection of CMOS integrated circuits with latch-up sensitivity at influence of space heavy charged particles.

New radio- and radiation protective composites filled with neutron, gamma and electromagnetic radiation absorbers with metal (aluminum alloys) and polymer (ultrahigh molecular weight polyethylene – UHMWPE) matrixes are created. Aluminum matrix composites with radiation absorbing fillers W, BN, B4C and W2V5 and polymer composites with similar fillers are the most interesting. Radiation tests are shown that these composites provide dose reduction of electronic components by secondary gamma radiation attenuation having influence on the space radio-electronic equipment.

Radiation response of bipolar transistors 2N2222A and voltage comparators LM111 at different dose rates and irradiation temperatures is described by the conversion model of ELDRS effect. It was obtained that at low-temperature irradiation the ELDRS effect appears in the devices, which are ELDRS-free at room temperature irradiation. This effect is connected with low value of the activation energy of the positive charge conversion process to interface traps at low temperature.

Results of determination of radiation hardness of constant-voltage regulator chips 1342EN5T and 1326PN1T in process and after impact of gamma radiation Co⁶⁰ are presented.

The FD_ORBIT2 program complex created in S.A. Lavochkin Scientific and production association and intended for definition of the ionizing radiation charged particles flux spectrums and the absorbed doses behind spherical protection in near-earth space by the spacecraft difficult evolving orbits is described.

The allowance is investigated that stopping power of material in the range of atomic number 6 < Z < 30 and in the range of space ionizing radiation electron and proton energy is close to mass aluminum stopping power therefore use of "dose-thickness" curves for aluminum is quite reasonable. The identical mass shielding thickness doesn´t lead to the identical total absorbed dose, and also to the identical mass of devices for different materials. In going from aluminum to iron, it is necessary to increase the mass shielding thickness. The error of this allowance and the influence of various materials on radiation protection mass are analyzed. The application of dissimilar materials both as a case construction, and as protection covers is compared.

Questions of predicted reliability updating of the spacecraft onboard equipment of long functioning completed by electronic components from the flight batches, which passed selective resistance tests to dose effects, are considered.

Process of a bremsstrahlung generation by interaction of an electron beam of RIUS-5 accelerator with a target is considered. For the description of radiation transfer, the model of individual collisions, which is convenient for effective calculation paralleling on hybrid computers, is used. The weight modifications of the Monte-Carlo method oriented on hybrid paralleling are constructed. The parallel code is developed for simulation of photon and electron transfer in substance on supercomputers with heterogeneous architecture by means of NVIDIA© CUDA technology. The algorithms are tested by comparing with calculation results using MCNP packet. The satisfactory consent of calculation results is shown. Results of comparing of numerical simulation and the experimental data are presented. The comparing showed the coincidence of qualitative character and a satisfactory consent of the quantitative calculated and experimental data.

The measurement results of gamma and neutron pulse form of the reactor BARS-4 and the accelerator RIUS-5 done with use of the distant pulse ionizing radiation fiber-optic sensor DIVO/40S are presented. The developed sensor had the reactor BARS-4 pulses impact within 1.5 years. Use of the sensor allows to bring the electrical registration system of radioluminescence optical signal out of a radiation zone and to raise electro and fire safety of system of standard radiation control of the reactor ionizing radiation and to expand the experimental opportunities of researches on accelerators.