Comparison of Xilinx Virtex-II FPGA SEE sensitivities to protons and heavy ions

A comparison of heavy-ion and proton-induced single event effect sensitivities has been made using the Xilinx Virtex-II field programmable gate array (FPGA). Recently fabricated test samples are selected for observations of single event upset and single event functional interrupt. A complex relationship appears to exist between the heavy ion and proton sensitivities due to effects such as multiple-bit upsets and elastic nuclear scattering.