This viewgraph presentation reviews the simulation of Single Event Upset ( SEU ) cross sections using the membrane electrode assembly ( MEA ) resistance and electrode diffusion ( MRED ) tool using " Best guess " assumptions about the process and geometry , and direct ionization , low - energy beam test results . This work will also simulate SEU cross - sections including angular and high energy responses and compare the simulated results with beam test data for the validation of the model . Using MRED , we produced a reasonably accurate upset response model of a low - critical charge SRAM without detailed information about the circuit , device geometry , or fabrication process