Professor Mike Alles of Vanderbilt University delivered this lecture for the Introduction to Radiation Effects Engineering online SCALE course.
Radiation testing underpins the reliability of electronic systems destined for harsh environments such as space, high‑altitude platforms, and nuclear facilities, where exposure to ionizing particles can induce failure modes that are impractical to observe in situ. Understanding the necessity of pre‑flight qualification and the cost‑effectiveness of ground‑based exposure experiments is essential for engineers tasked with delivering robust hardware. The topic therefore occupies a central role in modern aerospace and defense development programs.
The presentation surveys the spectrum of testing objectives, ranging from formal qualification against military or NASA standards to part‑screening, lot variability assessment, and data collection for commercial‑off‑the‑shelf (COTS) components. It contrasts surrogate source strategies—such as using protons to emulate neutron effects—with direct beam testing, and emphasizes the integration of empirical data into model calibration and validation workflows. Particular attention is given to the coupling of radiation effects with operational variables (temperature, bias, frequency) and the difficulty of interpreting results from highly integrated, system‑on‑chip devices where component‑level isolation is no longer feasible.
Armed with this knowledge, learners can articulate the strategic importance of radiation testing, evaluate and prioritize competing testing objectives, and critically assess the complications introduced by testing integrated systems. They are prepared to make informed decisions about facility selection, surrogate‑source utilization, and the design of experiments that capture both worst‑case and realistic operating conditions, thereby supporting reliable hardware qualification and the development of predictive radiation‑effects models.