Position Summary: The Princeton University Plasma Physics Laboratory (PPPL) seeks to fill a post-doctoral research physicist position at the National Spherical Torus Experiment Upgrade (NSTX-U) in Princeton, NJ. For tokamaks and future facilities to operate safely in a high-pressure long-pulse discharge, it is imperative to address key issues associated with impurity sources, transport and core high-Z impurity accumulation. A vital component of the experimental work will include the development of a predictive model for soft-x-ray (SXR) emission and the construction and maintenance of a new multi-energy SXR diagnostic to measure the characteristic emission from medium- to high-Z impurities. Applicants should have an experimental background and familiarity with running (1D and 2D) tomographic reconstruction algorithms as well as transport codes (e.g. MIST, STRAHL, NCLASS, TRANSP, etc.). The successful candidate is expected to participate in impurity transport experiments in NSTX-U under a wide range of plasma densities, temperatures and confinement scenarios. Exploring both neoclassical fluxes and the Z-scaling of core turbulent transport is essential. The effect of resonant magnetic perturbations (RMPs) on impurities will be also characterized aiming at developing control tools to prevent core accumulation. This effort is designed to contribute to the near- and long-term highest priority research goals for NSTX-U which will integrate a non-inductive operation at reduced collisionality, with high-pressure, long energy-confinement-times and a transition to a divertor solution with metal walls.
Essential Qualifications: Minimum qualifications include a Ph.D. in experimental plasma physics or a closely related discipline.
Preferred Qualifications: The ability to interface effectively with a wide range of scientific and technical personnel is highly desirable.
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