Affiliation:
1. Institut Max von Laue - Paul Langevin , 71 avenue des Martyrs, 38042 Grenoble, France
Abstract
In this last of a series of three papers on the development of an advanced solid-state neutron polarizer, we present the final construction of the polarizer and the results of its commissioning. The polarizer uses spin-selective reflection of neutrons by interfaces coated with polarizing super-mirrors. The polarizer is built entirely in-house for the PF1B cold neutron beam facility at the Institut Max von Laue–Paul Langevin (ILL). It has been installed in the PF1B casemate and tested under real conditions. The average transmission for the “good” spin component is measured to be >30%. The polarization averaged over the capture spectrum reaches a record value of Pn ≈ 0.997 for the full angular divergence in the neutron beam, delivered by the H113 neutron guide, and the full wavelength band λ of 0.3–2.0 nm. This unprecedented performance is due to a series of innovations in the design and fabrication in the following domains: choice of the substrate material, super-mirror and anti-reflecting multilayer coatings, magnetizing field, and assembling process. The polarizer is used for user experiments at PF1B since the last reactor cycle in 2020.
Reference49 articles.
1. Characterization of a ballistic supermirror neutron guide;Nucl. Instrum. Methods Phys. Res., Sect. A,2006
2. Measurement of the parity violating triton emission asymmetry in the reaction 6Li(n,α)3H with polarized cold neutrons;Phys. Rev. C,2008
3. First observation of P-odd asymmetry of α-particle emission in the 10B(n,α)7Li nuclear reaction;Phys. Lett. B,2017
4. Rotation of the compound nucleus 236U* in the fission reaction 235U(n, f) induced by cold polarised neutrons;Phys. Lett. B,2007
5. Particular features of ternary fission induced by polarized neutrons in the major actinides 233,235U and 239,241Pu;Phys. Rev. C,2016
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