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CHESS: The Future Direct Geometry Spectrometer at the Second Target Station



G. Sala, M. Mourigal, C. Boone, Nicholas Butch, A. Christianson, O. Delaire, A. J. DeSantis, C. L. Hart, R. Hermann, T. Huegle, D. N. Kent, J. Y. Lin, M. Lumsden, M. Manley, D. G. Quirinale, M. B. Stone, Y. Z.


CHESS is a planned direct geometry neutron chopper spectrometer designed to detect and analyze weak signals intrinsic to small cross-sections (e.g., small mass, small magnetic moments or neutron absorbing materials) in powders, liquids and crystals. CHESS is optimized to enable transformative investigations of quantum materials, spin liquids, thermoelectrics, battery materials and liquids. The broad dynamic range of the instrument is also well suited to study relaxation processes and excitations in soft and biological matter. The 15 Hz repetition rate of the Second Target Station (STS) at the Spallation Neutron Source enables the use of multiple incident energies within a single source pulse, greatly expanding the information gained in a single measurement. Furthermore, the high flux grants an enhanced capability for polarization analysis. This enables the separation of nuclear from magnetic scattering or coherent from incoherent scattering in hydrogenous materials over a large range of energy and momentum transfer. This paper presents optimizations and technical solutions to address the key requirements envisioned in the science case and the anticipated uses of this instrument.
Review of Scientific Instruments


neutron spectrometer


Sala, G. , Mourigal, M. , Boone, C. , Butch, N. , Christianson, A. , Delaire, O. , DeSantis, A. , Hart, C. , Hermann, R. , Huegle, T. , Kent, D. , Lin, J. , Lumsden, M. , Manley, M. , Quirinale, D. , Stone, M. and Z., Y. (2022), CHESS: The Future Direct Geometry Spectrometer at the Second Target Station, Review of Scientific Instruments (Accessed April 19, 2024)
Created May 31, 2022, Updated November 29, 2022