Effects of SEU and SEB are simulated with 0.4μm diameter microbeam. SEU for drain region of MOSFET and CMOS SRAM are calculated. Collective charge depending on LET for specific device structure is calculated for different ions. LET and critical charge are provided. SEB for VDMOS is simulated and electric field, potential line, current, rate of impact ionization are given at different times along ion tracks. It is very important for heavy microbeam test physics models which have been set up.

The MEDICI software of two dimensional simulation of semiconductor device is briefly introduced.Its characteristics and use are described.With the help of MEDICI,effects of total dose for MOSFET and dose rate for pn junction are simulated.Their physical models are set up.A theory approach is provided for the research of ionization radiation effects.

Finite difference method is used to simulate the physical process numerically during which the electromagnetic signal is generated by the interaction of nuclear-explosion-induced currents with the geomagnetic field. The EMP waveforms above burst point are researched. The earth-based coordinates and the local spherical coordinates are introduced to illustrate propagating properties of the nuclear electromagnetic pulse along the orbit direction of satellites with various explosion height and yield. Taking into account the attenuation and dispersion of the ionospheric plasma, the FFT method is used to extrapolate the strength of the DEMP. With cosmic noise considered, the peak electric field strength with the yield over 1 kt could be detected at a distance of 10⁴km.

The finite difference and PIC method are used to simulate the behavior of secondary electrons stimulated by primary X-ray photoelectrons. The results are given for the air pressure below 1 Pa and the plasma effects of low energy secondary electrons to the irradiated conductor are discussed as well.

The System generated electromagnetic pulse (SGEMP) generated by X rays in various ranges of fluence have been numerically studied.Certain trends about the electric and magnetic field and their distribution as a function of fluence are abtained and discussed.

In this report we have presented the forms of Maxwell's equations and the source equations in the ellipsoidal-hyperbolidal coordinates, obtained the numerical results of IEMP produced in the metallic ellipsoidal cavity when its major axis is parallel to the γ flux by using finit difference method.