Poplar: A polarized neutron development beamline for polarization analysis and Larmor labeling techniques

Fankang Li; Kaleb Burrage; Wei Lu; Dominic Giuliano; Arturo Diaz; Wei Tian; Doug Kyle; Lowell Crow

doi:10.1063/4.0000783

Poplar: A polarized neutron development beamline for polarization analysis and Larmor labeling techniques

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Abstract

A thermal neutron development beamline equipped with a Si monochromator has been commissioned at the HB-2D beam port of the High Flux Isotope Reactor at Oak Ridge National Laboratory. This instrument is dedicated to the development of neutron scattering methods and instrumentation, serving as a complement to the cold neutron development beamline CG-4B at the cold guide hall. Two incident wavelengths are available, 2.43 and 1.72 Å, with a flux of 1.75 and 1.28 × 10 5 n / (cm 2 s), respectively. The instrument can be operated either in high-resolution or high-intensity mode through the horizontal bending of the monochromator. As the bending increases, the incident flux on the sample increases as a result of the additional lattice strain induced in the silicon wafers. With its mission centered on advancing neutron scattering instrumentation, the beamline has been named POPLAR, an acronym for polarized neutron development beamline for polarization analysis and Larmor labeling techniques.

Original language	English
Article number	024301
Journal	Structural Dynamics
Volume	13
Issue number	2
DOIs	https://doi.org/10.1063/4.0000783
State	Published - Mar 1 2026

Funding

F. Li is grateful to the ORNL teams for their support andJustin Bolton, Jon Smith, Barton Bailey, and Elias Pulliam for theircontributions to the instrument design. F. Li also thanks GaryTaufer, Mike Harrington, Hugh Harvey, and Steve Hicks for theirassistance with data acquisition and instrument control, and ErikStringfellow, Mike McDowell, and John Carruth for leading theinstallation efforts. Additionally, F. Li appreciates the valuablediscussions with Masaaki Matsuda and Huibo Cao.This work was supported by the U.S. Department of Energy(DOE), Office of Science, Office of Basic Energy Sciences, EarlyCareer Research Program Award (KC0402010), under ContractNo. DE-AC05-00OR22725. This research used resources at theHigh Flux Isotope Reactor, a DOE Office of Science User Facilityoperated by the Oak Ridge National Laboratory. The beam timewas allocated to HB-2D under Proposal No. IPTS-34986.1.This manuscript was authored by UT-Battelle, LLC underContract No. DE-AC05-00OR22725 with the U.S. Department ofEnergy. The United States Government retains and the publisher,by accepting the article for publication, acknowledges that theUnited States Government retains a non-exclusive, paidup,irrevocable, world-wide license to publish or reproduce thepublished form of this manuscript, or allow others to do so, forUnited States Government purposes. The Department of Energywill provide public access to the results of federally sponsoredresearch in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doepublicaccess-plan). This work was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences, Early Career Research Program Award (KC0402010), under Contract No. DE-AC05-00OR22725. This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The beam time was allocated to HB-2D under Proposal No. IPTS-34986.1.

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10.1063/4.0000783

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title = "Poplar: A polarized neutron development beamline for polarization analysis and Larmor labeling techniques",

abstract = "A thermal neutron development beamline equipped with a Si monochromator has been commissioned at the HB-2D beam port of the High Flux Isotope Reactor at Oak Ridge National Laboratory. This instrument is dedicated to the development of neutron scattering methods and instrumentation, serving as a complement to the cold neutron development beamline CG-4B at the cold guide hall. Two incident wavelengths are available, 2.43 and 1.72 {\AA}, with a flux of 1.75 and 1.28 × 10 5 n / (cm 2 s), respectively. The instrument can be operated either in high-resolution or high-intensity mode through the horizontal bending of the monochromator. As the bending increases, the incident flux on the sample increases as a result of the additional lattice strain induced in the silicon wafers. With its mission centered on advancing neutron scattering instrumentation, the beamline has been named POPLAR, an acronym for polarized neutron development beamline for polarization analysis and Larmor labeling techniques.",

author = "Fankang Li and Kaleb Burrage and Wei Lu and Dominic Giuliano and Arturo Diaz and Wei Tian and Doug Kyle and Lowell Crow",

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AU - Li, Fankang

AU - Burrage, Kaleb

AU - Lu, Wei

AU - Giuliano, Dominic

AU - Diaz, Arturo

AU - Tian, Wei

AU - Kyle, Doug

AU - Crow, Lowell

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AB - A thermal neutron development beamline equipped with a Si monochromator has been commissioned at the HB-2D beam port of the High Flux Isotope Reactor at Oak Ridge National Laboratory. This instrument is dedicated to the development of neutron scattering methods and instrumentation, serving as a complement to the cold neutron development beamline CG-4B at the cold guide hall. Two incident wavelengths are available, 2.43 and 1.72 Å, with a flux of 1.75 and 1.28 × 10 5 n / (cm 2 s), respectively. The instrument can be operated either in high-resolution or high-intensity mode through the horizontal bending of the monochromator. As the bending increases, the incident flux on the sample increases as a result of the additional lattice strain induced in the silicon wafers. With its mission centered on advancing neutron scattering instrumentation, the beamline has been named POPLAR, an acronym for polarized neutron development beamline for polarization analysis and Larmor labeling techniques.

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Poplar: A polarized neutron development beamline for polarization analysis and Larmor labeling techniques

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