NSE graduate student Yang Yang won two awards for presentations of his doctoral research at the 2017 American Nuclear Society Student Conference. Yang’s podium presentation entitled “The Necessity of Full-3D Monte Carlo Simulations for Ion Irradiation” won the Best in Materials Science and Technology Award. His summary paper on the same topic won the Best Overall Research Award.
Yang’s work focuses on computer simulations of dopants/defects distributions generated by nanoscale ion implantation. Recently, combination of ion radiation with nano-engineering has become a novel technique for improving materials’ performance. However, accurately tuning of materials properties by ion radiation relies on the precise knowledge of dopants/defects distribution. Widely used one-dimension (1D) Monte Carlo simulation approach such as SRIM (the Stopping Range of Ions in Matter) 1D approach will fail to predict these distributions when the exchange of ions at boundaries become significant. Using the recently NSE-Team-developed full-3D Monte Carlo simulation code for ion irradiation in matter (IM3D), Yang quantifies the relative error of 1D approach in several classic applications. He discovers that 1D approach significantly overestimates the dose in nano-sized targets. His work resolves a long-standing issue about when full-3D ion irradiation simulations become necessary.
Yang, a fifth-year PhD student, is working on this project with professors Ju Li, Michael Short from MIT NSE, Dr. Chung-Soo Kim, Prof. Karl Berggren from MIT EECS, and Dr. Yonggang Li from Chinese Academy of Sciences.
The 2017 ANS Student Conference was hosted by the The University of Pittsburgh.