POWGEN: a third-generation high resolution high-throughput powder diffraction instrument at the Spallation Neutron Source

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Zeitschrift fur Kristallographie

DOI:https://doi.org/10.1524/9783486991321-024· OSTI ID:1028770

Huq, Ashfia ^[1]; Hodges, Jason P ^[1]; Heroux, Luke ^[1]; Gourdon, Olivier ^[1]

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1. ORNL

Powgen represents a departure from previous designs for a time-of-flight powder diffractometer at a spallation neutron source and may be considered a third-generation design. The instrument is optimized for both parametric studies of materials under a wide range of conditions (T, P, H, flowing gases, etc) and ab-initio crystal structure determinations of complex solid-state materials with asymmetric unit-cells of the order {approx}1500 {angstrom}{sup 3}. The geometric design of the instrument allows for all detected scattered neutrons to be focused onto a single diffraction profile yielding high count rate while preserving good resolution {Delta}d/d = 0.0015 at a d = 1 {angstrom}.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1028770
• Journal Information: Zeitschrift fur Kristallographie, Vol. Proc 1
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CRYSTAL STRUCTURE
DESIGN
DIFFRACTION
DIFFRACTOMETERS
GASES
NEUTRON SOURCES
NEUTRONS
RESOLUTION
SPALLATION