A STUDY OF MONTE CARLO SIMULATIONS OF THE SPUTTERING AND ION SOLID INTERACTIONS IN FUSION REACTORS

Research on enhancing the plasma confinement characteristics in fusion reactors and tokamaks has focused heavily on Low-Z plasma facing components Be, BeO, and SiC in recent decades. Building reactors, reducing harmful effects, and creating materials resistant to radiation all depend on an understanding of the plasma material interactions. In nuclear reactors, material composition and properties are also influenced by an understanding of impurity interactions. This thesis aims to investigate the effects of varying sputtering rates and long-term plasma durability on structured materials sputtered by plasma under various situations. The majority of this research has been done on the sputtering of materials as it accelerates the degradation of materials. To understand the process of ion solid contacts, a thorough investigation of ions' interactions with target atoms is presented in this work. Monte Carlo (MC) simulation has been done in this entire research by using the transport of ions in matter (TRIM). The influence of ion energy (100–1000 eV) and ion incidence angle by deuterium ions has been simulated in this study. As expected, on one hand, sputtering yield, as a function of ion-energy peaks first and a sequential reduction afterword; on the other hand, as a function of ion-incidence angle shows sequential enhancement towards max value followed by sharp reduction afterwards. The simulated data have been compared with the relevant experimental data and very close agreements were observed. To investigate the behavior of ion energy loss in relation to ion range in the targets, distribution profiles associated with ion range, recoil, ionization, and phonons are developed. Deuterium accumulation and its impact on Be target also have been shown in this work. The sputtering yield of BeD₂ is lowest when the D incident ion interacts with low percentage of D has been simulated as target. Gradually increasing the percentage of D as target results in higher yields.