17 Works

NG4 - Disk-Chopper Time-of-Flight Spectrometer (DCS)

National Institute Of Standards And Technology
The NG4 neutron guide incorporates an "optical filter" which removes almost all of the high energy neutrons and gamma-rays in the initial section of the guide. After an auxiliary cooled graphite filter and local shutter there are seven disk choppers that collectively produce clean monochromatic bursts of neutrons at the sample position. The sample is located in a large sample chamber, accessible from above and from the side; a radial collimator reduces scattering from the...

NG2 - High-Flux Backscattering Spectrometer (HFBS)

National Institute Of Standards And Technology
The NCNR backscattering spectrometer is one of the highest intensity instruments of its kind. It enables very high energy resolution studies of the low frequency dynamics of many systems. Applications of backscattering spectroscopy are numerous and include molecular reorientations, dynamics of adsorbed systems, and viscous liquids.

NG5 - Spin-Polarized Triple-axis Spectrometer (SPINS)

National Institute Of Standards And Technology
A multi-crystal analyzer with 11 PG blades provides horizontal focussing capability. The focusing is fully automated and controlled from the instrument computer. A two-dimensional position-sensitive detector (PSD) is also available. With the multi-crystal analyzer, the PSD (20 cm � 25 cm in area) can simultaneously probe scattering events with different momentum and energy transfer.

BT9 - Multi-Angle Crystal Spectrometer (MACS)

National Institute Of Standards And Technology
The Multi Axis Crystal Spectrometer at the NIST Center for Neutron Research is a third generation cold neutron spectrometer that provides ultra high sensitivity access to dynamic correlations in condensed matter on length scales from 0.1 nm to 50 nm and energy scales from 2.2 meV to 20 meV. The project is funded jointly by the NIST Center for Neutron Research, the National Science Foundation, and the Johns Hopkins University.

NGD - Polarized Beam Reflectometer/Diffractometer (PBR)

National Institute Of Standards And Technology
This cold neutron instrument is used to study materials of interest in surface and interfacial science, including magnetic multilayers, polymer films, and artificial biological membranes. PBR is most commonly used for specular neutron reflectometry, a technique sensitive to the depth profiles of the nuclear composition and the vector magnetization in thin films and multilayers. For magnetic samples, the option to use a spin polarized neutron beam allows for clear distinction between magnetic and structural contributions...

NGB - 30m SANS - Small Angle Neutron Scattering

National Institute Of Standards And Technology
Sponsored by the National Science Foundation as part of the Center for High Resolution Neutron Scattering (CHRNS), this instrument is installed on a split neutron guide NG-B. Designed to cover a wide Q-range, from 0.015 nm-1 to nearly 6 nm-1, it is suitable for examining structural features in materials ranging from roughly 1 to 500 nm. At least 75% of the instrument time will be allocated to guest researchers by the Beam Time Allocation Committee...

BT1 - High Resolution Powder Diffractometer

National Institute Of Standards And Technology
The BT-1 high-resolution neutron powder diffractometer is used to to obtain neutron powder diffraction data for crystallographic analysis by the Rietveld method or other characterization purposes. It is a 32 detector instrument that can be used with three different monochromators and two different incident Soller collimators, allowing the instrument response to be tailored to the needs of the experiment. The instrument can be used with furnaces, refrigerators and cryostats so that data may be collected...

BT5 - USANS - Ultra Small Angle Neutron Scattering

National Institute Of Standards And Technology
A perfect crystal diffractometer (PCD) for ultra-high resolution small-angle neutron scattering (USANS) measurements has been in operation at the thermal neutron beam port, BT-5 since 2002. The PCD increases the maximum size of features accessible with the NCNR's 30-m long, pinhole collimation SANS instruments by nearly two orders of magnitude, from ~102 nm to 104 nm.

NGB - 10m Small Angle Neutron Scattering

National Institute Of Standards And Technology
The NCNR 10m Small Angle Neutron Scattering (SANS) instrument is designed to measure the structure of materials, primarily in solid and liquid form. The measured data are in the form of scattered intensity at a specific scattering angle. The primary information gained from measurements using SANS is a map of spatial correlations in composition. Length scales measured are typically in the range of single to hundreds of nanometers. Typical quantities extracted include the long period...

BT8 - Residual Stress Diffractometer

National Institute Of Standards And Technology
The Residual Stress Diffractometer is used for measuring lattice strains and preferred orientation (texture), for studying residual and applied stress in engineering materials, and the effect of materials processing on preferred orientation. Designed for versatility, the heart of the instrument is a rotating drum that allows - together with three monochromators - to select wavelengths from 0.08 nm to 0.32 nm. This enables the measurement of d-spacings anywhere between 0.06 nm up to 0.22 nm...

BT7 - Double Focusing Triple-Axis Spectrometer

National Institute Of Standards And Technology
As part of the modernization of the thermal neutron spectrometers, a new state-of-the-art thermal neutron instrument has been installed at the BT-7 thermal beam port. There is a choice of collimations in the reactor beam that bring neutrons onto a choice of PG(002) or Cu(220) 20 cm by 20 cm double-focusing monochromators. The sample stage incorporates an independent magnet axis in addition to the usual motorized sample orientation and rotation angles. The analyzer and detector...

NGD - MAGIK Offspecular Reflectometer

National Institute Of Standards And Technology
The MAGIK reflectometer complements the Polarized Beam Reflectometer and the Horizontal-Geometry Reflectometer in providing specialized capabilities for measurements of in-plane scattering in addition to world-class depth-profiling (with specular reflectivity) of biological, battery/electrochemical, polymer, and magnetic thin films. Polarized-beam measurements are possible with the use of a 3He analyzer. This instrument is an evolution of the AND/R reflectometer, which was located on the NG-1 guide. MAGIK is located along the NG-D guide in the expanded guide...

NG7 - SANS - Small Angle Neutron Scattering

National Institute Of Standards And Technology
The 30 meter long Small-Angle Neutron Scattering (SANS) instrument on neutron guide NG7 was the first new instrument to go into operation in the NCNR guide hall in May 1991. Jointly developed and sponsored by the NCNR, the ExxonMobil Research and Engineering Co., and the University of Minnesota, the instrument has undergone a number of improvements over the years to remain, along with its near-twin on guide NGB, the best such instruments in the U.S....

BT4 - Triple Axis Spectrometer

National Institute Of Standards And Technology

BT4 - Filter Analyzer Neutron Spectrometer/Triple-Axis Spectrometer

National Institute Of Standards And Technology

NG7 - Horizontal Neutron Reflectometer

National Institute Of Standards And Technology
Neutron reflectometry is a relatively new technique for investigating the near-surface structure of many materials. Specifically, it probes the neutron scattering density at depths of up to several thousand Å, with an effective depth resolution of a few Å. What is measured is the profile of reflectivity as a function of angle beyond the critical angle for total external reflection. The sample must thus present a smooth, flat surface, preferably several cm2 in area. The...

Neutron Spin Echo Spectrometer (NSE)

National Institute Of Standards And Technology
Neutron Spin Echo (NSE) spectrometers use the Larmor precession of the neutrons' magnetic moment in a magnetic field as an internal clock to time the transit of the individual neutrons through two large solenoids, one placed before and one placed after the sample. This method allows one to obtain the highest energy resolution possible (sub μeV) over a wide range of incident wavelengths. NSE instruments directly measure the real part of the intermediate scattering function...

Registration Year

  • 2016
    17

Resource Types

  • PhysicalObject
    17

Data Centers

  • National Institute of Standards and Technology (NIST)
    17