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About

Jerry Edelstein is a leading experimental astrophysicist whose career has been defined by pioneering the robotic fiber-positioning technology that powers the largest dark energy surveys ever conducted. As a key architect of the Dark Energy Spectroscopic Instrument (DESI), Edelstein’s primary contributions lie in the design and implementation of the instrument’s revolutionary focal plane system. He led the development of the 5,020 robotic fiber positioners that automatically retarget optical fibers every 10–20 minutes with micron-level precision, a feat described in his highly cited 2022 paper (175 citations). This technology, first prototyped for the BigBOSS experiment (80 citations), enables DESI to simultaneously measure the spectra of 40 million galaxies and quasars, mapping the expansion history of the universe over 14,000 square degrees. His work on fiber system design and focal ratio degradation has been critical to ensuring the instrument’s performance. With his foundational 2016 DESI instrument design paper garnering 234 citations, Edelstein’s engineering innovations have directly enabled the Stage IV dark energy experiment that is now transforming our understanding of cosmic acceleration and the growth of large-scale structure.