Materials that undergo controllable structural and property changes upon external stimuli are known as stimuli-responsive or “smart” materials. Understanding the transitional pathway and the out-of-equilibrium state of their micro-structures are crucial for the establishment of a dynamic structure-property relationship. With increasing neutron flux, time-resolved small angle neutron scattering...
High Current Accelerator driven Neutron Sources (HiCANS) are considered as the next generation medium flux neutron facility taking over the role of today’s national neutron sources. The High Brilliance Source HBS will provide dedicated target stations delivering ~ 100 kW proton beam power, where the instruments around the target station define the pulse and spectral properties of the neutrons...
We have been developing a 3He neutron spin filter (NSF) for the efficient utilization of pulsed neutrons, since the 3He NSF is effective for neutrons in the wide energy range. The 3He NSF is effective especially for neutrons with energy higher than several-tens-meV. It also can cover a large solid angle and polarize neutrons without deflecting them from their original trajectory, it is...
As one of the important auxiliary devices for neutron scattering instruments, sample environment provides various experimental conditions to enhance the research capabilities of the instruments. The sample environment at the Chinese Spallation Neutron Source (CSNS) has been providing in-situ experimental services since the commissioning of the instrument in 2018. It has evolved from initially...
Spherical Neutron Polarimetry (SNP) is a powerful technique which can measure the variation of polarization directions between incident and scattered neutron. Using this technique, the directional and phase information of the magnetic structure factor can be determined. This technique has been achieved by Meissner effect or high permeability alloys to produce zero-field environment.
We are...
High pressure is an important pathway to access and understand the properties of materials as well as their various phases in the fields ranging from mineral physics inside the earth to cooperative many-body quantum phases emerging in crystals.
At PSI we combine the high-pressures with accelerator-based scattering and resonance methods in order to explore, understand and control theses...
Conventional neutron scattering techniques encounter limitations when measuring scattering events characterized by small momentum or energy transfers due to the inherent trade-off between resolution and useable flux. To address this challenge, we explore the innovative utilization of neutron spin Larmor precession. By harnessing this phenomenon, it becomes possible to encode neutron momentum...
Muon spin spectroscopy, known as a collection of muon spin rotation, relaxation and resonance (μSR) techniques, uses highly polarized muons to study the microscopic magnetic structure and dynamics of condensed matter. The interaction between muon spins and the local field inside materials forms the physical basis of μSR techniques. Such information is extracted by the detection of positrons...
There are two neutron facilities at Oak Ridge national laboratory(ORNL): High Flux Isotope Reactor(HFIR) with the world’s highest continuous neutron brightness and Spallation Neutron Source(SNS) with the world’s highest peak neutron brightness. Supported by the powerful neutron sources of SNS and HFIR, the diffraction instruments at ORNL have developed world leading capabilities on high...
Small-Angle Neutron-Scattering (SANS) with polarization analysis is a powerful technique to investigate magnetic order in hard condensed matter systems on the nanometer and mesoscopic length scales, and to suppress hydrogen incoherent scattering in soft matter materials. The high neutron flux expected at the European Spallation Source (ESS), coupled with novel instrumentation that will be...
AMATERAS, cold-neutron disk-chopper spectrometer at the Materials and Life Science Experimental Facility in J-PARC, has been in operation since 2009 [1]. Due to its high flexibility of the neutron intensity and the energy resolution, AMATERAS has been used for experiments in various research fields such as magnetism, functional materials and so on. Recent issues of AMATERAS are the high...
ABSTRACT
Probing the interplay between crystal structure and magnetism in new multinary oxides through the Rietveld refinement of high resolution synchrotron and neutron powder diffraction data has becoming increasingly critical for the advancement of science and technology in condense matter science. The seminar will highlight the brief summary of the (X+n) results collected at reputed...
Accelerator driven neutron sources provide a cost-efficient and attractive alternative to classical neutron sources like fission reactors. With the advent of high current proton accelerator systems, a novel class of such neutron facilities can be established termed High-Current Accelerator-driven Neutron Sources (HiCANS). Such sources can counteract the increasing shutdown of existing...
A Multi-Slit Very Small Angle Neutron Scattering (MS-VSANS) has just been accepted at beam line 14# in China Spallation Neutron Source (CSNS). MS-VSANS aims to achieve the best signal-to-noise ratio. It has three modes, i.e., SANS, VSANS and polarized neutron, respectively. With three 11 m2 He3 detectors at 1 m, 4m and 12 m, and one 2121 cm2 high resolution detector at 12.75 m...
The muon experiment facility called the Muon Science Establishment (MUSE) is the user facility at J-PARC MLF as well as the neutron facility.
The muon production target, which is 2 cm thick graphite consuming about 5% of 3 GeV proton beam and located 30 m upstream from the neutron mercury target, produces high-intensity muon beams to be utilized in versatile muon science studies. Four...
TOSCA is a high-resolution, broad band, indirect geometry chemical spectrometer operated at the ISIS Neutron and Muon Source, UK. As a neutron analogue to optical spectroscopy, it is optimised for the study of molecular vibrations in fields such as catalysis, hydrogen storage materials, hydrogen bonded systems, or biological and organic compounds. We present the detailed design and performance...
In this work, we present a demonstration of performing polarized neutron imaging (PNI) at the beamline BL20 at Chinese Spallation Neutron Source (CSNS). Utilizing the V-cavity supermirror as the polarizer, the in-house developed in-situ polarized 3He neutron spin filter (NSF) system as the analyzer, and an energy resolved neutron imaging detector, an aluminum cylindrical solenoid as a sample...
Neutron Spin Echo (NSE) instruments are the highest energy resolution neutron spectroscopy instruments. WASP the Wide Angle Spin echo is the youngest member of this family. WASP’s magnetic configuration is unique, it is the single functioning instrument of its kind. After four cycles of user operation the first results were published. It will be shown on practical examples how the very wide...
