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Title: The SNS Liquids Reflectometer

Journal Article · · Neutron News

The SNS Liquids Reflectometer [1], installed as one of the first instruments at the Spallation Neutron Source, has now been functional for more than a year. This instrument is designed to view liquid and solid surfaces in specular, off specular, and near-surface small angle scattering geometries. The guide system supplies 2 {angstrom} < {angstrom} < 16.5 {angstrom} neutrons at vertical incident angles ranging from 0{sup o} < {alpha}{sub i} < 5.5{sup o} for free liquid surfaces and up to 45{sup o} for solid surfaces. Three bandwidth choppers, synchronized with the spallation source and operating at 15-60 Hz, provide neutrons in bandwidths ranging from 3.5-14 {angstrom} at a fixed incident angle onto a sample. The sample stage enables all of the motions necessary for positioning liquid and solid surfaces, while the detector arm directs a position-sensitive detector to view the sample at specular or off specular angles up to 90{sup o} and can scan out of the specular plane by up to 30{sup o}.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
DOE Contract Number:
DE-AC05-00OR22725
OSTI ID:
943540
Journal Information:
Neutron News, Vol. 19, Issue 3
Country of Publication:
United States
Language:
English