Work Environment: Outdoors, In confined space, heights, Underground, Working alone, Working overtime or irregular schedule, Domestic/foreign travel, operation of motor vehicles, Work with weapons or explosives, Work with vibrating equipment/machinery, Work near machinery with moving parts, toxic chemicals, irritant chemicals, dusts or powders, sprays, mists, or vapors, fumes, carcinogens, Hearing protection, Gloves or hand protection, Safety shoes or protective foot-gear, Headgear or head protection, safety glasses or eye protection, face shield or facial protection, Mask or respirator. Specific topics of interest for this position include A) development and experimental validation of IREB physics models and tunes based on reduced-order models such as beam envelope methods, including higher-order models, B) characterization and diagnosis of beam interactions with highly collisional, high-Z plasmas, C) radiofrequency and similar high-frequency phenomena associated with IREB operation, D) intense, flash, photon source characterization up to 20 MeV energies, and E) development of physics studies leveraging facilities throughout the US to advance DARHT-relevant physics studies.