The Solar Anomalous Magnetosphere Particle Explorer (SAMPEX) is the first in a series of Small Explorer spacecraft being managed by GSFC. In order to meet mission constraints of power, weight, and volume, newer enabling technologies were utilized. These include a Solid State Recorder/SSR (a RAM-based array of memory utilized for storing science and engineering telemetry on-board the spacecraft), the SEDS MIL-STD-1773 Fiber Optic Data Bus (the first utilization of a fiber optic data bus as an in-line spacecraft subsystem), the Intel 80386 microprocessor family (currently a candidate or baseline for XTE, TRMM, portions of EOS-AM, Space Station, et al...), surface mount technology, etc...
Have a look at the paper Single Event Effect Flight Data Analysis of Multiple NASA Spacecraft and Experiments; Implications to Spacecraft Electrical Designs by C.M. Seidleck, K.A. LaBel, et. al. It investigates in-flight SEEs observed on SAMPEX, CRUX, and TOMS.
Flight data available: