Applications of 3He neutron spin filters at the NCNR

At the NIST Center for Neutron Research (NCNR), we have applied 3He neutron spin filters (NSFs) to the instruments where 3He NSFs are advantageous, such as thermal triple-axis spectrometry, small-angle neutron scattering, and diffuse reflectometry. We present the status of our development and applic...

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Bibliographic Details
Published in:	Physica. B, Condensed matter Vol. 404; no. 17; pp. 2663 - 2666
Main Authors:	Chen, W.C., Erwin, R., McIver III, J.W., Watson, S., Fu, C.B., Gentile, T.R., Borchers, J.A., Lynn, J.W., Jones, G.L.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-09-2009
Subjects:	3He flipping 3He NSF Polarization analysis SANS TAS Wide-angle 83.85.Hf 32.80.Bx Polarization analysis SANS TAS 3He NSF 75.25.+z 61.12.Ld 3He flipping Wide-angle
Online Access:	Get full text
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Summary:	At the NIST Center for Neutron Research (NCNR), we have applied 3He neutron spin filters (NSFs) to the instruments where 3He NSFs are advantageous, such as thermal triple-axis spectrometry, small-angle neutron scattering, and diffuse reflectometry. We present the status of our development and application of this method, including polarized gas production by spin-exchange optical pumping, magnetostatic cavities for storage of the polarized gas on the beam line, and nuclear magnetic resonance (NMR)-based, on-line monitoring and reversal of the 3He polarization. We present the status of developing user-friendly interfaces incorporated into the instrument software to handle these 3He neutron spin filters while taking data and performing data analysis. Finally we discuss the status of development of a polarization capability on the multi-axis crystal spectrometer, which requires polarization analysis over a 220 ° angular range.
ISSN:	0921-4526 1873-2135
DOI:	10.1016/j.physb.2009.06.040