The mercury target at J-PARC MLF provides neutron beam for material and life science. However it is also good neutrino source to search for ‘sterile neutrino’ for basic science at the same time. This article describes JSNS2 experiment (J-PARC Sterile Neutrino Search using J-PARC Spallation Neutron Source).
Based on the time-of-light (TOF) technique, new generation pulsed neutron sources enable novel neutron scattering experiments. Using small-angle neutron scattering (SANS) at the pulsed neutron sources, simultaneous measurements of SANS and Bragg edge transmission can be performed. From the SANS profiles, the precipitates and inclusions in metals and alloys are characterized, while the Bragg edge transmission spectra give crystallographic information about the matrix. This is a powerful tool for quantitative characterization of the microstructures in the metals and alloys. The neutron transmission experiments have potential for further development. Magnetic Bragg edge transmission analysis will be useful for magnetic materials. These new neutron scattering techniques enhance the usability and flexibility of neutron scattering experiments.
A new cold neutron triple-axis spectrometer was installed at OPAL reactor in ANSTO. The components, capabilities, sample environment, software, statistics, and commissioning experiments are presented in this paper. Plans for future progress are also discussed. The authors look forward to welcoming users to promote neutron science in Australia, Taiwan, and the rest of the world with SIKA.
The superconductivity has been applied to detect a neutron through sequential detector development. The current-biased transition-edge detector (CB-TED) of MgB2 wire detected neutrons successfully at temperatures near the critical temperature. Contrarily, the Nb-based current-biased kinetic inductance detector (CB-KID) with a 10B converter observed neutrons at wide temperatures in the superconducting state. Finally, the delay-line CB-KID achieved neutron imaging by using only the four leads from the detector.