Papers
7
Total Citations
328
H-Index
6
About
L. Le Guillou is a key figure in the engineering and cosmological analysis of the Dark Energy Spectroscopic Instrument (DESI), one of the most ambitious ground-based surveys ever undertaken. Their primary research areas encompass the design, calibration, and performance of robotic fiber positioning systems, as well as the critical mitigation of systematic effects in large-scale structure measurements. Le Guillou’s major contributions include leading the development and installation of DESI’s revolutionary focal plane, which houses 5,020 robotic positioners capable of retargeting optical fibers to a precision of several microns every 10–20 minutes—a feat described in their highly cited 2022 paper (175 citations). They have also been instrumental in characterizing and correcting for fiber assignment incompleteness, a vital step for unbiased clustering measurements, as detailed in their 2025 works (25 and 20 citations). Le Guillou’s impact is further underscored by their involvement in the first detection of the baryon acoustic oscillation signal from early DESI data (37 citations). Through this work, they have helped lay the foundation for the most precise 3D map of the universe, enabling transformative insights into dark energy and cosmic expansion.
Research Focus
Key Achievements
Top Papers
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- 2Overview of the Fiber System for the Dark Energy Spectroscopic Instrument57 citations · 2024
- 3First detection of the BAO signal from early DESI data37 citations · 2023
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