A National Network Of Accelerators Dedicated To Material Irradiation (EMIR)
- Hosting Legal Entity
- Lujan Neutron Scattering Center at Los Alamos Neutron Science Center (LANSCE) of Los Alamos National Laboratory
- Coordinating Country
- United States
- RI Keywords
- engineering materials, geoscience, extreme environments, polycrystalline materials
- Lujan Center, Group Office TA-53, Bldg. 622, Rm. 220, LANSCE, Los Alamos National Lab, Los Alamos, NM 87545 USA
- The Spectrometer for Materials Research at Temperature and Stress (SMARTS) is a third-generation neutron diffractometer optimized for the study of engineering materials. It was funded by DOE and constructed at the Lujan Center, coming online in the summer of 2001.
SMARTS provides an exciting range of capabilities for studying polycrystalline materials focusing on two areas: the measurement of deformation under stress and extreme temperature, and the measurement of spatially-resolved strain fields. The underpinning technique is neutron diffraction, which has been used to study engineering structural materials since the early 1980s.
Instrument Scientist: Don Brown
firstname.lastname@example.org, (505) 667-7904
- Application Area
- SMARTS combines a large volume sample hutch with medium-high d-space resolution. It is designed for the study of internal stresses in engineering materials under external stimuli. it allows measurements of spatially resolved strain fields, phase deformation and load transfer in composites, as well as the evolution of stress during extreme external stimuli. SMARTS is also used to determine texture and dislocation density when extreme environments unique to the engineering diffractometer are required.
(1) Materials in Extreme Enviornments and Geoscience:
The response of materials to extreme conditions is at the forefront of current materials science research. The high penetration of neutrons through bulk materials enables the study of materials under extreme conditions of temperature, pressure, stress, magnetic ?eld, and irradiation.The neutron di?ractometers at the Lujan Center, in particular the Spectrometer for Materials Research at Temperature and Stress (SMARTS), the High Pressure Preferred Orientation (HIPPO) and the Neutron Powder Di?ractometer (NPDF), provide the oportunity to monitor microstructural evolution, e.g. phase behavior, texture, internal stress, and dislocation density of structural, functional, nuclear and geological materials, under extreme external stimuli.
- Thrust Leader: Don Brown (email@example.com)
- SMARTS expands the application base of neutron diffraction to a wider range of engineering problems than previously possible. With an extensive array of in situ capabilities for sample environments, it enables measurements on small (1 mm3) or large (1 m3) samples. Components with dimensions up to 1 m and up to 1500 kg can be positioned precisely in the beam. Permanently mounted alignment theodolites provide a simple and efficient way to position samples or equipment to within 0.01 mm. The furnace and load frame suite allows research on materials under extreme loads (250 KN) and at extreme temperatures (1500 °C). In situ uniaxial loading on samples up to 1 cm in diameter at stresses of 2 GPa and with lower stresses at temperatures up to 1500 °C are routine. (1) Specifications:  Performance - Moderator: Chilled H2O, high resolution - Resolution at 90° (wavelength dependent): ~ 0.4% - d-spacing range: ~ 0.5 - 4 ？ - Nominal time for 1 cm3 under load at temperature: ~ 10 minutes - Nominal time for 1 mm3 in 10-mm-thick Fe plate: ~ 60 minutes  Primary Flight Path - Moderator to sample: ~ 31.0 m - Incident collimation (at sample): 1 - 625 mm2  Secondary Flight Path - Sample to 90° tube: ~ 1.5 m - 2" angle subtended (each 90° bank): ~ 30°  Load-Frame Furnace - Maximum uniaxial force (compression or tension): 250 KN - Actuator motion: 0.15 m - Furnace maximum temperature―under load: 1500°C - Furnace maximum temperature―stand alone: 1800°C - Minimum temperature: 200 K - Specimen geometries: Threaded tesile/cylinder compression - Magnet: 1.5 T  Translator - Capacity: 1500 kg - Motions: X = 0.3 m, Y = 0.3 m, Z = 0.6 m, R = 370°  Radial Collimators - 2 angled subtended: 20° - Spatial resolution parallel to beam: 0.5,1, 2, 3, 4 mm