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Current models of antineutrino production in nuclear reactors predictdetection rates and spectra at odds with the existing body of direct reactorantineutrino measurements. High-resolution antineutrino detectors operatedclose to compact research reactor cores can produce new precision measurementsuseful in testing explanations for these observed discrepancies involvingunderlying nuclear or new physics. Absolute measurement of the 235U-producedantineutrino spectrum can provide additional constraints for evaluating theaccuracy of current and future reactor models, while relative measurements ofspectral distortion between differing baselines can be used to search foroscillations arising from the existence of eV-scale sterile neutrinos. Such ameasurement can be performed in the United States at several highly-enricheduranium fueled research reactors using near-surface segmented liquidscintillator detectors. We describe here the conceptual design and physicspotential of the PROSPECT experiment, a U.S.-based, multi-phase experiment withreactor-detector baselines of 7-20 meters capable of addressing these and otherphysics and detector development goals. Current R&D status and future plans forPROSPECT detector deployment and data-taking at the High Flux Isotope Reactorat Oak Ridge National Laboratory will be discussed.

PROSPECT - A Precision Reactor Oscillation and Spectrum Experiment at Short Baselines