Projects per year
Abstract
Highly multiplexed, robotic, fiber-fed spectroscopic surveys are observing tens of millions of stars and galaxies. For many systems, accurate positioning relies on imaging the fibers in the focal plane and feeding that information back to the robotic positioners to correct their positions. Inhomogeneities and turbulence in the air between the focal plane and the imaging camera can affect the measured positions of fibers, limiting the accuracy with which fibers can be placed on targets. For the Dark Energy Spectroscopic Instrument, we dramatically reduced the effect of turbulence on measurements of positioner locations in the focal plane by taking advantage of stationary positioners and the correlation function of the turbulence. We were able to reduce positioning errors from 7.3 to 3.5 μm, speeding the survey by 1.6% under typical conditions.
Original language | English |
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Article number | 263 |
Pages (from-to) | 1-10 |
Number of pages | 10 |
Journal | Astrophysical Journal |
Volume | 168 |
Issue number | 6 |
DOIs | |
Publication status | Published - 14 Nov 2024 |
Keywords / Materials (for Non-textual outputs)
- instrumentation: spectographs
- techniques: spectroscopic
Projects
- 1 Active
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Probing dark matter distribution in the Milky Way with the DESI survey
Science and Technology Facilities Council
1/04/24 → 31/03/27
Project: Research