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About

M. Schubnell is a key figure in experimental cosmology, best known for his instrumental contributions to the Dark Energy Spectroscopic Instrument (DESI). His primary research focuses on the development of advanced robotic systems for massive spectroscopic surveys, enabling precise measurements of the universe’s expansion history. Schubnell’s most significant contribution is his leadership in designing, producing, and testing the DESI fiber positioner system—a groundbreaking array of 5,020 robotic actuators installed on the Mayall Telescope at Kitt Peak. These robots automatically reposition optical fibers to target individual galaxies and quasars every 10–20 minutes with micron-level precision, a feat critical for capturing spectra from 35 million objects across 14,000 square degrees. His work on this system, detailed in a 2022 paper with 175 citations, has been foundational for DESI’s baryon acoustic oscillation measurements. Schubnell’s efforts in fiber positioner production and performance testing, documented in earlier publications, have further cemented his reputation as a master of precision instrumentation, directly enabling one of the most ambitious cosmological surveys ever undertaken.