Relocation and upgrade of neutron spin echo spectrometer, iNSE

ISSP-NSE instrument previously installed at the C2-2 port of the guide hall of JRR-3M, the Japan Atomic Energy Agency (JAERI), was relocated to the C2-3-1 port at the end of the C2 cold guide and renamed as “iNSE”. The instrument is now equipped with a neutron velocity selector capable of changing the neutron wavelength in the range of 4–16Å with the wavelength resolution from 10% to 20%. The scattering angle was extended up to 98∘98∘. A new set of polarizer and analyzer consisting of the remanent supermirrors derives about 87% of polarized neutrons with the wavelength of 7Å. The neutron flux at the sample position was increased by a factor of 2 to 3. At present, the upgraded instrument covered the range of the spatial and time domains of 0.01⩽q⩽0.4Å-1 and 0.05⩽t⩽50ns, and these ranges may be further extended.