Test of a continuously polarized He-3 neutron spin filter with NMR-based polarization inversion on a single-crystal diffractometer
Type of Work
Physica B: Condensed Matter
Spin filters based on the large spin dependence of the neutron absorption cross-section by 3 He are currently being applied in neutron scattering. We report here the construction and test of a He-3 neutron spin filter that incorporates (1) in situ continuous optical pumping to maximize the time-averaged polarization and maintain a stable He-3 polarization during experiments, and (2) low-loss adiabatic-fast-passage inversion of the He-3 polarization to eliminate the need for a neutron spin flipper. The device was successfully tested at the single-crystal diffractometer at the Intense-Pulsed Neutron Source, Argonne National Laboratory. This device can be used in measurements of static magnetic-materials as well as magnetic-relaxation phenomena with long relaxation times. Published by Elsevier B.V.
Jones, Gordon L.; Dias, Malcolm F. '05; Collett, Brian; Chen, W. C.; Gentile, T. R.; Piccoli, P. M. B.; Miller, M. E.; Schultz, A. J.; Yan, H.; Tong, X.; Snow, W. M.; Lee, W. T.; Hoffmann, C.; and Thomison, J., "Test of a continuously polarized He-3 neutron spin filter with NMR-based polarization inversion on a single-crystal diffractometer" (2006). Hamilton Digital Commons.
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