Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8168278 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2016 | 6 Pages |
Abstract
Requirements on the field uniformity in neutron polarizers are analyzed in view of the fact that neutron polarizing coatings have been improved during the past decade. The design of magnetic systems that meet new requirements is optimized by numerical simulations. Magnetic systems for wide-aperture multichannel polarizers and analyzers are represented, including (a) the polarizer to be built at channel 4-4â² of the reactor PIK (Gatchina, Russia) for high-flux experiments with a 100Ã150 mm2 beam of polarized cold neutrons; (b) the fan analyzer covering a 150Ã100 mm2 window of the detector at the Magnetism Reflectometer (SNS, ORNL, USA); (c) the polarizer and (d) the fan analyzer covering a 220Ã110 mm2 window of the detector at the reflectometer NERO, which is transferred to PNPI (Russia) from HZG (Germany). Deviations of the field from the vertical did not exceed 2°. The polarizing efficiency of the analyzer at the Magnetism Reflectometer reached 99%, a record level for wide-aperture supermirror analyzers.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
A.G. Gilev, N.K. Pleshanov, B.A. Bazarov, A.P. Bulkin, A.F. Schebetov, V.G. Syromyatnikov, V.V. Tarnavich, V.A. Ulyanov,