Numerical Simulation of Damage Effect for Ferroelectric RAM Irradiated by Space High-Energy Particles

In order to simulate the damage effect of space high-energy particle interacting on ferroelectric random access memory (RAM), the theoretical model of laser supported detonation wave is derived. Also, the equivalent target model of the collision between the core region of the ferroelectric RAM and high-energy particles is established. The high-energy oxygen and nitrogen atoms are selected as the sources of high-energy particles in the air at normal temperature and pressure. The source of particles that bombard the ferroelectric RAM is used to simplify the simulation of the composite target. Meanwhile, the theory of molecular reaction dynamics, the particle collision software based on the Monte Carlo algorithm provided by Stopping and Range of Ions in Matter (SRIM), is used to simulate the collision of high-energy particles with air. The simulated results show that the electron stopping capability of air to high-energy nitrogen and oxygen atoms is far greater than the stopping capability of the nucleus; when the incident energy of high-energy particles is gradually increased, the blocking power of air to electrons increases first and then decreases. Also, the capability to stop the particles of the target nucleus is gradually reduced; under the condition of the implantation, the energy of nitrogen and oxygen atoms are both 1.8 MeV, the movement of the particles in the first seven layers of the target is relatively straight, and the phenomenon of deviation from the axis of symmetry is apparent in the silicon substrate. Due to the presence of more energy in the first seven layers of the target, it is not possible to see the more obvious lateral diffusion. The simulated results will provide a valuable reference for the prediction of single-event effects induced by ground-based pulsed laser simulating space high-energy particle irradiation.